App Developers Projects

SaaS testing

We have a number of SaaS websites/apps in development and we are looking for someone to properly test them and provide detailed feedback on issues, improvements needed which will support our dev team in creating the best products. We are looking for a long term agreement paid monthly ideally.

I need next.js and blockchain developers

I have an ecommerce site and am looking for next.js and blockchain experts who has rich experience in web development and ecommerce sites.

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UK Solicitor ONLY: Food app T&Cs, privacy & telemetry

I am launching a consumer mobile app in the food and recipe space, helping people reduce food waste and discover recipes. I need comprehensive legal documentation and data protection advice before going live. Full technical details will be shared once engaged. ------------------------------------------------- 1. PRIVACY POLICY, TERMS & CONDITIONS, AND TERMS OF USE Full, production-ready documents suitable for App Store (Apple) and Google Play submission, covering a global user base. Must address: - Data collected, purpose, and retention - Lawful basis for processing across all major jurisdictions (UK, EEA, US, and a framework for the rest of the world) - User rights (access, erasure, portability, objection) - Third-party processors and data sharing - Cookie/tracking equivalents in a mobile context - Minimum age requirements across jurisdictions ------------------------------------------------- 2. TELEMETRY AND DATA COLLECTION ADVICE The app collects behavioural telemetry linked to a pseudonymous per-install identifier (no name or email stored). I need written advice covering: - What I can legally collect, and on what lawful basis, across different regulatory regimes (UK GDPR, EU GDPR, CCPA/CPRA, and any other material jurisdictions) - Legitimate interest vs. consent, when each applies and how to document it - Anonymisation thresholds, what level of aggregation (e.g. on-device aggregation, k-anonymity, category-level bucketing) takes data outside scope entirely, and the equivalent thresholds under CCPA and other regimes - Commercial data licensing, whether and how anonymised or aggregated data can be sold or licensed to third parties without consent obligations, and what conditions must be met per jurisdiction - Children's data obligations by jurisdiction (COPPA, Article 8 UK/EU GDPR, etc.) - Proportionate and defensible retention periods ------------------------------------------------- 3. DPIA REVIEW Review and sign off a completed draft DPIA for the telemetry feature. Full document provided once engaged. ------------------------------------------------- WHAT I AM NOT LOOKING FOR - Generic template documents - Advice limited to UK/EU only, global coverage is a requirement - Junior associate work without senior oversight ------------------------------------------------- DELIVERABLES - Production-ready Privacy Policy (global scope) - Production-ready Terms & Conditions and Terms of Use - Written advice note on telemetry, anonymisation thresholds, and commercial data licensing by jurisdiction - DPIA sign-off or marked-up revisions ------------------------------------------------- BEFORE I ENGAGE, PLEASE PROVIDE Proof of qualification - SRA number or equivalent with current practising certificate Relevant experience - examples of privacy policies or data protection advice delivered for consumer mobile or digital products (anonymised references or case studies are fine) Data protection specialism - confirmation this is a primary part of your practice, not an occasional add-on; CIPP/E or BCS Practitioner Certificate in Data Protection preferred Global coverage - confirm you can advise substantively on UK GDPR, EU GDPR, and US (CCPA/CPRA) at minimum, and state clearly which other jurisdictions (Canada, Australia, Brazil etc.) you can or cannot cover Turnaround - this is blocking a production release, please state realistic timelines upfront

Paid UX Research Participants Needed – iOS Mobile App (US Only)

I’m running a usability study for a new iOS mobile platform and need a small group of everyday users — ages 18 to 60+ — to help evaluate the experience from a real user’s perspective. What’s involved: • Install the app and complete the standard onboarding flow • Explore features at your own pace over the study period • Respond to brief UX surveys sent intermittently • Submit a short screen recording at the end confirming feature use Compensation: • $50 flat fee paid upon successful onboarding completion • Up to $200 additional compensation tied to your level of engagement with the platform’s core features • Total potential earnings: $250 Requirements: • US-based • iPhone owner • Comfortable installing and navigating a new app No prior tech experience required. The hands-on portion is fully self-directed — outside of onboarding and occasional questionnaires, your time is your own.

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Shopify Developer & Design - product template + metafield system

We're an established UK online building-products retailer (large catalogue) levelling up our Shopify store, supplier by supplier. We're looking for a design-capable Shopify developer — someone who builds clean, well-structured Shopify and has a genuine eye for design. This first project builds the reusable foundation our whole catalogue will run on, then completes one product range (external cladding, ~11 products) as the gold-standard template. What the project involves: Set up a metafield + metaobject structure for product specs (material, colour, RAL, coverage, fire rating, dimensions, lead time, warranty) and per-brand info Build one flexible, well-designed product + collection template that auto-renders spec tables, a brand block, swatches and a coverage calculator from those metafields Configure storefront filters (Search & Discovery) from the metafields Add Product/Review schema and handle canonical/robots on filter URLs (no URL/handle changes — existing handles stay) Complete one cladding range end-to-end as the exemplar, including collection pages with auto-fill rules You must be able to show: Shopify metafield + metaobject experience Storefront filtering (Search & Discovery or similar) Liquid theme section development A portfolio of stores that genuinely look good, not just function Important: there's a design sign-off stage — you'll build the example product page in the template and we approve the look before go-live, as it becomes the template every other product inherits. Strong work leads to ongoing rollout across the wider catalogue at an agreed per-range rate. To apply, please include: Two or three Shopify stores you've built (ideally large catalogues with filtering) One line on how you'd structure metafields for a product that comes in multiple colours and sizes Your availability and rough timeline for a project of this size

AI-Powered Customer Support Chatbot Development

I'm seeking a Software Engineering Intern or Junior AI Developer to assist in the development of an AI-powered customer support chatbot. The project focuses on building an intelligent conversational assistant capable of answering user questions, retrieving information from knowledge bases, and providing accurate responses through modern AI technologies. The chatbot will support web-based interactions and utilize Large Language Models (LLMs) and Retrieval-Augmented Generation (RAG) techniques to improve response quality and contextual understanding.

Full-Stack Developer (Kotlin Multiplatform + SvelteKit)

We are Stuck In The Riddle Ltd, an escape room operator. We have recently finished building Riddle Ramble, an interactive, city-based escape room game app where players visit real-world waypoints to solve puzzles. The application is completely built and fully deployed, but our original development agency is winding down their operations. We are looking for a reliable, long-term freelance developer (or a tight-knit duo) to inherit the codebase, conduct a thorough initial code review, and handle ongoing maintenance, bug fixes, and future feature development. The Tech StackMobile Application: Kotlin Multiplatform (KMP) deploying to iOS and Android. Web Application (Creator Admin Dashboard): SvelteKit / JavaScript. Backend & Database: Firebase (Blaze Pay-As-You-Go Plan, utilizing Firestore, Authentication, and Cloud Functions). Hosting: Firebase Hosting (for the web app) and custom domain routing via GoDaddy. Infrastructure: Fully controlled under our own Google Cloud Organization workspace. Key Responsibilities Initial Code Review & Audit: Inherit the existing codebase from our GitHub repositories, set up a local development environment, and audit the code for stability and cleanliness. Onboarding & Configuration: Wire a local development/staging Firebase environment so updates can be safely tested before hitting the live production app. General Maintenance & Optimization: Act as our on-call developer to handle unexpected server issues, minor bugs, and OS-level update requirements (iOS/Android compliance). Future Feature Evolution: Collaborate with the business owner to plan and build new puzzle mechanics or game features over time. Candidate Requirements Proven, referenceable experience deploying live production apps using Kotlin Multiplatform (KMP). Strong proficiency in Svelte / SvelteKit and JavaScript for web applications. Production-level experience managing Firebase architecture (Firestore, Cloud Functions, Security Rules). Comfortable inheriting existing code without immediately demanding a full rewrite. Excellent communication skills in English.

Partner Network (Remote Business Development Role)

Build the FrontGlow Founding Partner Network (Remote Business Development Role) Overview FrontGlow Media is building a nationwide premium network of professionals across the UK in luxury residential, commercial AV, smart home technology and digital display solutions. We are looking for a proactive Business Development & Partnership Recruitment Manager to help build our Founding Partner Network. This is not a generic VA position. Your focus is identifying, engaging and qualifying professionals who would be a great fit for the FrontGlow Partner Network. Initial 60-Day Targets Recruit approximately 45 founding partners: 10 Interior Designers / Architects 10 Creative Media Professionals 10 Referral / Business Development Partners 5 Commercial Sales Partners 5 Technology Partners 5 Installation Partners Responsibilities Research suitable professionals. Conduct personalised outreach. Introduce FrontGlow and answer initial questions. Encourage suitable candidates to complete our Partner Application. Maintain our recruitment CRM. Schedule qualification calls where appropriate. Produce a weekly progress report. Research Sources LinkedIn PeoplePerHour Upwork Fiverr Pro Houzz Checkatrade MyBuilder RIBA BIID Local industry directories Professional communities Ideal Candidate We’re looking for someone with experience in: Business Development Recruitment Partnership Development LinkedIn Outreach CRM Management Relationship Building Experience in architecture, construction, AV, smart home, luxury residential or commercial sectors is a bonus. Success Metrics Your performance will be measured by results: Qualified professionals contacted Response rate Applications submitted Approved partners Accuracy of CRM records Weekly reporting Contract Initial 60-day contract 10–20 hours per week Opportunity for an ongoing role as FrontGlow expands To Apply Please include: A short introduction. Examples of outreach or recruitment campaigns you’ve managed. Your experience using LinkedIn or freelance platforms for business development. How you would approach recruiting high-quality professionals for a premium partner network. Your availability and hourly rate. We’re looking for someone who enjoys building relationships and can help establish a high-quality nationwide partner network.

Create a VCARD with Design likje a APP

We need an app-style design for a virtual business card (VCARD) for a company that will have several employees. The system will only use HTML/JS/CSS. Sample images can be used. The card will have 2 parts - Front and Back. Access to the back will be via Flip/Rotate.

Shopify web designer/developer

Hi, I’m looking for a Shopify developer to complete a handful of final tasks on our website. Main Menu STORIES * Already linked correctly. MAGAZINE * This should link to the magazine archive page (example attached). * Users should see available issues displayed vertically, with the newest issue always appearing at the top and older issues naturally moving down the page. * Each issue should have the option to purchase either the digital or print version, taking the user directly to the basket/checkout. * I have the templates designed already to make this faster LOS ANGELES * When clicked, this should take users to the Los Angeles section within Stories. * Los Angeles content must only appear within the Los Angeles section and should never appear in the main Stories feed. * The main Stories feed should only contain Liverpool-related content. SHOP everything is completed User Account * Please remove the account/profile icon, as we do not currently offer memberships or subscriptions. Footer * Network logos need linking to their respective websites (I can provide all URLs). * If possible, I’d also like some recommendations on improving the footer layout and navigation, although this isn’t urgent. General Testing * Please thoroughly test the website, including navigation, product links, checkout flow, automated emails and overall user experience. * I believe most of this is working, but I’d like confirmation everything has been checked properly. Priority Issue * I would like these changes done by today if possible Future Work (Please Quote Separately) * Homepage hero video replacement (Liverpool culture/music-focused video). I’m currently waiting on footage, so this will be in around a week’s time. * Embedding our Los Angeles radio station partner into the website and removing the current Shopify audio/list setup. This isn’t a priority right now and can be completed later. That’s pretty much everything for now. I’d love to get this sorted as quickly as possible. Ideally today if possible. Thanks, Amy

SaaS Developer — Bathroom360 Platform (React, Supabase)

ABOUT BATHROOM360 Bathroom360 Ltd is a UK-based technology startup building a vertical SaaS platform for the bathroom installation industry. Our platform takes a bathroom installer seamlessly from first customer contact through to invoicing and aftercare — survey, floor plan, 3D visualisation, quotation, building regulations, scheduling, and payment — in one connected cloud platform. We are seeking an experienced full-stack developer to build Version 1.0 of the Bathroom360 platform, ready for showcase at London Build Expo, Olympia, November 2026. A full Product Blueprint is attached to this posting. Please read it before submitting your proposal. Proposals that do not reference the Blueprint will not be considered. --- THE PROJECT We require a complete SaaS platform built to the specification in the attached Bathroom360 Product Blueprint. The platform serves three customer segments: independent bathroom installers, bathroom showrooms, and white-label partners. The platform includes 15 modules: company onboarding, customer CRM, bathroom survey, floor plan designer, 3D visualiser, finishes and tile specification, supplier product library, quotation engine, building regulations guidance, job scheduling, installation workflow, snagging and sign-off, invoicing and payments, aftercare and warranty, and an AI assistant powered by the Anthropic Claude API. --- TECHNOLOGY STACK REQUIRED The Blueprint specifies the following technology stack. You must have demonstrable experience with all of the following: - React and Next.js — frontend framework - Supabase — database, authentication, storage, and edge functions - Three.js — 3D bathroom visualisation - Tailwind CSS — styling - Stripe — subscription billing - Resend — email delivery - Anthropic Claude API — AI assistant integration - Vercel — hosting and deployment --- WHAT WE ARE LOOKING FOR - A developer or small team with a portfolio of completed SaaS projects - Demonstrable Three.js experience — please include examples of 3D work in your proposal - Experience building multi-tenant SaaS platforms with Supabase row-level security - Strong communication in English — this is a collaborative project requiring regular updates - UK-based or UK timezone working hours preferred --- PROJECT STRUCTURE This is a fixed-price project with milestone payments. We do not pay hourly and we do not pay the full amount upfront. Payment is structured as follows: - 25% on project start and infrastructure setup - 25% on completion of Phase 1 modules (survey, floor plan, 3D, quotation, PDF) - 25% on completion of Phase 2 modules (supplier library, invoicing, scheduling, AI) - 25% on final delivery, testing, and Expo readiness sign-off --- TIMELINE - Development start: August 2026 - Phase 1 complete: September 2026 - Phase 2 complete: October 2026 - Final delivery and testing: November 2026 - Showcase: London Build Expo, Olympia, November 2026 --- WHAT YOUR PROPOSAL MUST INCLUDE We will not respond to generic proposals. Your proposal must include: 1. Confirmation that you have read the attached Product Blueprint 2. Your fixed-price quote for the complete Version 1.0 build 3. Links to at least two previous SaaS projects you have built 4. At least one example of Three.js or 3D web work you have completed 5. Your proposed delivery timeline with milestones 6. Any questions or concerns about the specification --- ABOUT THE COMPANY Bathroom360 Ltd is founded by Pamella Edwards — a qualified plumber, heating and gas engineer, and Triple-Appointed London Build Ambassador for Women in Construction, Diversity in Construction, and Sustainability in Construction. The platform is built on deep industry expertise and a clear commercial model with three revenue segments. We are a serious business with a clear vision, a detailed product specification, and a confirmed showcase event. We are looking for a developer who is equally serious and can deliver to a professional standard. Please attach your proposal and we will respond within 48 hours. Bathroom360 Ltd

Football - Kit Builder Promotion

I need a video creating of our brand new 'Kit Builder' App - https://www.vervesport.co.uk/kit-builder This will be used as a paid advert. The meaning behind the Kit Builder, Football teams/coaches can browse & build the exact kit they want with all the colour, designs, sizing, customisation & delivery options.

Luxury Handbag Product Developer / Pattern Cutter Required

Project Overview We are launching a premium handbag collection inspired by couture lace, Swarovski crystal embellishment and luxury craftsmanship. The collection has already been conceptually designed and consists of three tote sizes (Bud, Bloom and Jardin), along with matching clutch and crossbody styles. I already have: Collection sketches Dimensions Design direction Material references Initial prototype from an overseas factory Italian embellishment supplier for the lace I am now looking for an experienced Luxury Handbag Product Developer to transform these concepts into production-ready luxury handbags. What I Need The successful candidate will: 1. Product Development Refine the existing bag designs for manufacture Ensure correct proportions and luxury construction Recommend improvements where necessary 2. Pattern Cutting Produce professional handbag patterns suitable for production Ensure correct seam allowances and construction Develop patterns for all three sizes 3. Technical Pack Create a factory-ready tech pack including: Full dimensions Pattern pieces Construction sequence Stitching specifications Seam allowances Leather reinforcement placement Lining construction Pocket construction Handle construction Base board specifications Hardware placement Edge finishing Bill of Materials (BOM) Material consumption Hardware specification Manufacturing notes Quality control notes 4. Prototype Support Review factory prototypes Identify construction issues Recommend improvements Work with the factory until the product reaches luxury quality standards Experience Required Please only apply if you have experience developing luxury handbags. Ideally you have worked with brands or manufacturers producing premium or luxury leather goods. Experience with: Leather handbags Luxury accessories Structured handbags Tote bags Pattern engineering Product development Factory communication Tech pack creation Experience with lace, couture fabrics or embellished products would be a significant advantage.

LMOps / DevOps for Knowledge Transfer & Course Development

About Us TechWorld with Nana is a fast-growing tech startup, known for high-quality DevOps and cloud engineering courses. We are building a new AI engineering course and need several experienced practitioners to help shape it. The Role We are looking for a senior AI/DevOps engineer based in the US to participate in a structured knowledge transfer engagement. You will walk our founder and course creator through your real-world AI use cases, tools, workflows, and production experience — helping us build a practical, hands-on AI course grounded in real engineering practice. This is not a development role. It is a paid consulting engagement focused on sharing knowledge and experience. What You'll Do Walk through your production AI use cases in structured sessions with our founder Share tools, architectures, workflows, and lessons learned from real AI projects Provide feedback on course content direction and practical relevance Help ensure the course reflects what engineers actually do in the field What We're Looking For Based in the US Strong production AI experience — LLMs, MLOps, AI tooling, or AI-integrated DevOps workflows DevOps/cloud background (AWS preferred) Comfortable explaining complex concepts clearly to a non-engineer audience English fluency required Why Join Us Your expertise will directly shape educational content seen by thousands of engineers worldwide. Flexible, async-friendly engagement. How to Apply Please share your background, relevant AI production experience, and your hourly rate expectation. Explain why you believe to be a good fit, and what experience you can contribute to this role. Kind regards

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Developer Required – Cloud-Based HR / Staff Management Platform

We are looking for an experienced web developer or software development company to build a secure, cloud-based HR and staff management platform. The system would be accessed through a web browser and used to securely store and manage staff information and documents. Potential features may include: Secure password-protected login Different access levels for administrators, managers and staff Employee/staff profiles and contact details Employment information and job roles Secure document upload and storage Training records, qualifications and certificates Holiday and absence information Document and certificate expiry reminders Search and reporting functions Employee self-service access Audit trail of changes Mobile-friendly design Secure cloud hosting, backups and recovery Appropriate GDPR and data protection measures We are open to recommendations regarding the best technical approach. The system may initially start with a core set of features, with the potential to expand over time. We would like interested developers to provide: Relevant experience Examples of similar systems developed Recommended approach Estimated timescale Indicative costs Ongoing hosting, maintenance and support options Experience developing secure business systems, HR platforms, staff portals or cloud-based database applications would be highly desirable. Please get in touch with details of your experience and an outline of how you would approach the project.

Senior Next.js Developer (5+ years of experience)

We are looking for a skilled Next.js Developer to help build a decentralized platform focused on digital ownership and content monetization. Responsibilities - Develop and maintain the frontend using Next.js (App Router) - Connect frontend to backend APIs (Express.js) for off-chain data storage (MongoDB) - Integrate wallet connection and interact with smart contracts using wagmi, viem, or web3 - Ensure responsive design and smooth user experience Requirements - Strong experience with Next.js (App Router) and React - Experience working with REST APIs - Hands-on experience with wagmi, viem, and web3 - Comfortable with version control (Git) Nice to Have - Experience with Express.js and MongoDB - Background in educational or content-marketplace platforms

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VBA Developer Needed to Reconcile Inventory

We are looking for an experienced VBA / Database Developer to help us resolve a technical misalignment in our inventory management system's go-live data. The system utilizes a FIFO engine where IngredientBatches controls batch availability, and a movement-led IngredientStock ledger calculates live stock based on receipt/consumption transactions. Currently, a gap in our opening balance setup has caused our live stock dashboard to display negative figures. The strategy and a core fix module (mod_OpeningStockReceipts.bas) have already been outlined. We need an expert to run diagnostics, align the columns, execute the fix safely, and ensure full system reconciliation without disrupting existing consumption history. Scope of Work Module Integration: Import and test a provided VBA module (mod_OpeningStockReceipts.bas) designed to generate missing opening receipt entries in the movement ledger from existing batch data. Column & Data Alignment: Run data validation checks (via a provided macro) to identify and correct misaligned data columns (specifically Status and RemainingQty in the IngredientBatches table). Data Reconciliation: Ensure that: IngredientStock reconciles perfectly with positive opening balances. FIFO batches remain completely unchanged. Existing ConsumptionLedger records stay intact. No duplicate stock movements are created. System Validation: Rebuild and validate the live stock dashboard formulas to ensure future "End of Day" automated runs function reliably. Thank you

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Flutter Developer — iOS Background Geofencing & FCM Push

About the project We are building a London driving app that alerts drivers the moment they enter the ULEZ or Congestion Charge Zone — even with the phone locked and app closed. The UI is being built in FlutterFlow by the founder. I need a Flutter specialist for the native engine layer only. What you'll build Integrate flutter_background_geolocation into a FlutterFlow project — GPS must run with screen locked and app killed on iOS and Android Write zone crossing detection logic against TfL GeoJSON boundaries (CCZ + ULEZ) Write zone entries to Supabase on crossing and trigger FCM push notification via Edge Function Save FCM token to Supabase, configure APNs key in Firebase for iOS All tested and confirmed working on a real iPhone Stack: Flutter/Dart · FlutterFlow · Supabase · Firebase FCM · flutter_background_geolocation · TfL GeoJSON Timeline: ~4 weeks · Fixed price preferred Requirements — non-negotiable Live App Store or Google Play app with iOS background geofencing that you built — include the link in your proposal or it will not be read Flutter + Dart minimum 2 years FlutterFlow custom actions experience Firebase FCM on iOS (APNs configuration) Supabase or PostgreSQL experience To apply, include in your proposal: App Store / Play Store link showing live background geofencing Which package/approach you used and why Your fixed-price quote for this scope Your earliest start date Proposals without all four will not be considered.

I need a blockchain developer for the DEX project

I'm looking for an experienced blockchain developer to build a decentralized exchange (DEX). The project includes smart contract development, wallet integration, token swaps, liquidity pools, and frontend integration. Requirements: - Strong Solidity experience - Previous DEX or DeFi development - Experience with Hardhat/Foundry - React/Next.js + Ethers.js or Viem - Knowledge of AMM, liquidity pools, and blockchain security Please share: - Relevant DEX/DeFi projects - GitHub or portfolio - Your estimated timeline and budget Only apply if you have proven experience building blockchain or DeFi applications.

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Product UI / Design System Designer for Hospitality SaaS

I’m looking for an experienced Product UI / UX Designer to help define the visual language for my SaaS platform, Grace. Grace is a hospitality operating system covering reservations, CRM, loyalty, marketing, reporting, EPOS and AI. The platform is already well into development and contains the majority of the required functionality. This is NOT a “design my app from scratch” project. The workflows already exist. I need somebody to take an existing product and turn it into a polished, premium SaaS experience. What already exists * Existing working application * Existing design system * Comprehensive UI Requirements Catalogue * Premium UI kits for inspiration * Hundreds of implemented screens and workflows * Existing React / Tailwind codebase What I need I am not expecting every screen in the application to be designed. Instead, I want somebody to define the visual language that everything else will follow. Deliverables would include: * Production-ready Figma Design System * Typography * Colour palette * Spacing system * Elevation and shadows * Iconography * Buttons * Inputs * Tables * KPI cards * Navigation * Drawers * Modals * Charts * Empty states * Loading states * Design tokens I’d also like approximately 8-10 flagship screens redesigned, such as: * Dashboard * Guest Profile * Reporting * Reservations * Host Screen * Marketing * AI Panel * Settings The remaining screens will then be implemented using this design language. Style I am aiming for a premium B2B SaaS product. Think: * Linear * Vanta * Stripe Dashboard * Notion * Raycast * Modern Apple interfaces I already own premium UI kits which can be used for inspiration, particularly around analytics, widgets and charts. I do not want these copied. They should simply inform the visual direction. The final product should have its own identity. Important This project is about creating a cohesive design system, not producing hundreds of individual screens. Experience designing complex SaaS products is much more important than experience creating marketing websites. Please include: * Examples of SaaS dashboards or internal tools you’ve designed. * Your approach to creating scalable design systems. * Whether you’ve worked alongside AI-assisted development tools such as Cursor or Claude Code. * Your estimated timeline and cost. Budget: Approximately £500, potential to work on future development of the product as we scale and hit the market.