Technology & Programming Projects

React Native & Node.js developer for release audit

I need an experienced React Native / Expo and Node.js developer to conduct a final release audit for my full-stack mobile app and backend. Check for release blockers, crash risks, broken flows, auth and payment flows, security/privacy issues, and app store readiness. Provide a short written report first; no code changes until approval. Must have experience with Stripe, Google OAuth, mobile release and security best practices. This is a fixed-price audit only.

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WordPress Speed Optimisation (Advanced)

We are currently experiencing slow load times, particularly on the homepage across both mobile and desktop, where sections take time to fully appear. From our performance reports, the main issue appears to be related to media, specifically how videos and images are being loaded. This is not a basic cache or plugin job - the core issue seems to be video loading and overall content delivery. We would like to keep all videos self-hosted and maintain the current visual design. No visual or layout changes are required - the focus is purely on improving how content loads. This needs to be implemented globally across the site, as many service pages are duplicated across multiple area pages. All work should be carried out on a staging environment first, with no changes made directly to the live site. Once approved, changes can then be pushed live. We are looking for the following: • Videos should not load on initial page load; only a static poster (preview) image should be displayed initially • Video files should only load on user interaction (e.g. hover or tap), not automatically in the background • Poster images should maintain a clean, premium appearance without visible play controls • Lazy loading should be applied across media to prevent unnecessary loading • Videos should remain self-hosted, avoiding third-party platforms such as YouTube or Vimeo • Mobile devices should be served optimised video versions or fallback images where appropriate • Images should be properly resized, compressed, and served in modern formats to reduce file size without affecting visual quality The goal is to significantly reduce initial page weight and improve load speed while maintaining a smooth, premium user experience. While media loading appears to be the main issue, we would also expect a full performance review of the site, including scripts, CSS, and overall loading behaviour, to ensure any additional bottlenecks are identified and addressed as part of the optimisation. Before proceeding, could you please confirm: 1. Whether you can achieve strong performance improvements while keeping videos self-hosted 2. What level of improvement we can realistically expect (particularly for initial load and homepage performance) 3. What approach you would take to implement this, especially regarding video loading strategy If possible, please also provide examples of similar work, particularly on video-heavy websites. We are specifically looking for someone who understands video and image optimisation and loading strategies, not just general WordPress speed plugins. Note: There is also a minor issue on Safari where the layout appears to shift slightly on load, likely related to fonts or responsive behaviour. This is secondary but would also want this to be reviewed and rectified alongside the performance work. We are not looking for a separate paid audit or discovery phase - we expect a clear outline of approach before proceeding, with implementation included within the agreed scope. Strong communication is important, and we are happy to discuss further via call if needed once initial approach has been outlined. Thanks

SQL Query development to fix Indexing, loops and other issues

Seeking an experienced SQL specialist to optimize and complete a large query against voluminous healthcare databases. Responsibilities include diagnosing and resolving indexing inefficiencies, correcting malfunctioning loops, refactoring and consolidating subqueries, and integrating disparate name-code mappings to match source and company records accurately. Deliverables should improve performance, ensure correctness, and produce maintainable, well-documented SQL suitable for enterprise-scale data matching.

Domain and DNS Management

I need the DNS settings for my new domain configured, full 301 redirect, global search and replace of the old brand name and assets.

Senior Software Engineer (Part-Time / On-Call)

Seeking a versatile Senior Software Engineer (part-time, on-call) to support a diverse technical portfolio—from AI-integrated SaaS to high-performance cloud infrastructure. Ideal candidate excels in at least two areas: AI/ML & data (LLMs, prompt engineering, LangChain, vector DBs), Python full-stack (FastAPI/Django, async, ORMs), Node.js/TypeScript (backend, React/Next.js), or infrastructure (AWS, Docker, Kubernetes). Responsibilities: deliver production-ready code across concurrent projects, provide reliable on-call support and rapid troubleshooting, translate requirements into scalable architectures, and uphold rigorous documentation, testing, and code quality standards. Long-term potential to transition into a full-time lead role.

Login Protected Web portal

Hi, I’m looking to build a very simple internal staff portal for my medical practice. Scope: Login-protected webpage Dashboard with buttons (Scheduling, Billing, etc.) Each button opens a website WITHOUT exposing the actual URL to staff Clean, professional design Hosted on my domain (portal.cityderma.com) This is Phase 1 only, so I want something simple, fast, and reliable. Please share: Estimated cost Timeline Examples of similar work Thanks

Senior React Native Engineer (6+ Month Engagement)

We're hiring a senior software engineer with deep React Native expertise to lead development on an ongoing mobile product. This is a fixed-price engagement with scope for 6+ months of continued work as milestones are completed. ⚠️ US-based applicants only. Proposals from outside the United States will not be reviewed. You must be able to verify US residency and work during US business hours. About the Role You'll own significant portions of our React Native codebase, ship production features to both iOS and Android, and help shape technical direction on the mobile side. This isn't a junior-friendly role - we need someone who can architect, execute, and deploy without hand-holding. What You'll Do - Design and build features in React Native with TypeScript across iOS and Android - Drop into native Swift (iOS) or Kotlin (Android) when bridging, debugging, or optimizing performance requires it - Architect and maintain state management using Redux (or justify a better choice) - Own App Store and Google Play submissions end-to-end, including provisioning, signing, review responses, and phased rollouts - Collaborate with backend and design on API contracts and UX decisions - Write clean, tested, maintainable code and review others' work Must-Have Qualifications - 5+ years of professional software engineering experience, with 3+ years focused on React Native in production - Strong TypeScript fluency — not "I've used it," but genuinely comfortable with advanced types, generics, and strict mode - Hands-on native iOS development in Swift (writing, not just reading) - Hands-on native Android development in Kotlin (writing, not just reading) - Production experience with Redux or a comparable state management library (Zustand, MobX, Redux Toolkit, etc.) at scale - Demonstrated history of shipping apps to the App Store and Google Play, including handling rejections and store review processes - Based in the United States Nice to Have - Experience with CI/CD for mobile (Fastlane, EAS, Bitrise) - Familiarity with native module authoring and React Native's New Architecture (Fabric/TurboModules) - Performance profiling experience on mobile Engagement Details -Type: Fixed-price, milestone-based Duration: 6+ months, ongoing Location: Remote, US only Hours: Flexible, but meaningful overlap with US business hours required

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Senior Game Developer (Unity / Cocos3D) – US Only

Are you a seasoned game developer ready to craft next-level gaming experiences? We’re looking for a US-based Senior Game Developer with deep expertise in Unity or Cocos3D to join our innovative team. What You’ll Do: - Build and optimize high-quality games for mobile and desktop platforms. - Bring game ideas to life with clean, efficient, and scalable code. - Collaborate with designers, artists, and fellow developers to create engaging gameplay. - Troubleshoot and enhance existing game systems for performance and stability. - Mentor junior developers and share your technical expertise. - Stay ahead of industry trends and implement best practices in game development. What We’re Looking For: - US-based only (remote work). - Proven track record as a senior game developer with published titles. - Expert in Unity3D (C#) or Cocos3D (C++/Lua). - Strong knowledge of game physics, AI, animations, and multiplayer systems. - Experience optimizing performance across platforms. - Excellent problem-solving skills and attention to detail. - Great communication skills and ability to thrive in a remote environment. Bonus Points: - Experience with AR/VR or multiplayer online games. - Knowledge of shaders or graphics optimization. - Familiarity with cloud game services like PlayFab or Firebase. Why Join Us: - Work remotely from anywhere in the US. - Competitive pay for top-tier talent. - Be part of exciting, high-profile game projects with creative freedom.

Developer User Testing: Video Review of AI Tool (Bitloops CLI)

We're seeking experienced developers (experience using AI coding agents like Codex, Claude Code, Open Code, etc.) to conduct user testing of our new AI development tool and provide video feedback on their first-time experience. What is Bitloops? Bitloops is an intelligence layer for AI-native development that helps capture context, validate code changes, and provide context directly to the AI coding agents during AI-assisted coding workflows. It's designed as a CLI tool with IDE plugins and git hooks. What you'll do: Explore our GitHub repository (https://github.com/bitloops/bitloops) and share your initial impressions Install the CLI tool following our documentation Run through the getting started guide and basic functionality Record a 15-20 minute video speaking your thoughts aloud throughout the process What we want to hear about: First impressions of the GitHub repo (README, documentation quality, code structure) Installation experience (any friction, unclear steps, or smooth sailing) Your understanding of what the tool does and how it fits into development workflows Ease of getting up and running with a real project Any confusion points, suggestions, or "aha moments" How you see this fitting (or not fitting) into your current development process Requirements: Professional software developer with 3+ years experience Comfortable with CLI tools and git workflows Experience with AI coding assistants (GitHub Copilot, Claude, ChatGPT, etc.) Good English communication skills for video narration Screen recording capability Deliverables: One 15-20 minute screen recording with audio commentary Brief written summary (2-3 paragraphs) of key takeaways Timeline: 3-5 days from project start This is genuine user research to improve our developer experience. We value honest, constructive feedback over praise.

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Business App for Building Restoration Company

Project Brief: Mobile App for Stone Restoration Estimating Overview I am an estimator for a stone restoration company. A significant part of my role involves conducting site surveys, recording repair requirements, and then producing detailed schedules of work with associated pricing. Currently, I take shorthand notes on-site and later spend several hours manually typing these into structured documents and calculating costs. I would like to develop a mobile application that streamlines this process by allowing me to capture structured data on-site and automatically generate a formatted pricing schedule. Objectives Reduce time spent on manual transcription and pricing Standardise descriptions of repair works Minimise human error in pricing and documentation Enable faster turnaround from survey to quotation Core Functionality User Input Interface (Mobile-Friendly) Simple, fast interface designed for use on-site Dropdown menus / scroll selectors for: Repair type (e.g. crack repair, stone replacement, repointing, cleaning, etc.) Size or measurement (e.g. m², linear meters, unit count) Optional manual input fields for: Notes or special conditions Custom measurements Predefined Repair Database Each repair type has: A short code / abbreviation A full written description (used in final document) A predefined unit price Ability to update/edit pricing and descriptions (admin function) Automatic Description Generation Based on selected inputs, the app generates: Full repair description Measurement details Unit rate and total cost Live Pricing Calculation App calculates totals automatically as items are added Running total for entire project Schedule Builder Users can add multiple repair items into a list Each item includes: Description Quantity Rate Total Export / Output Generate a professional document (PDF or Word format) Structured as a schedule of works / pricing document Option to: Email directly from the app Save to device or cloud storage Additional Features (Desirable but Not Essential Initially) Voice-to-text for notes while surveying Photo attachment per repair item Offline functionality (important for site work) Cloud sync for backing up projects Template-based output formatting (company branding) Technical Considerations Mobile-first design (iOS and Android preferred) Fast, minimal input steps (optimised for field use) Simple backend database for repair types and pricing Scalable structure for adding new repair categories End Goal The app should allow me to complete most of the survey documentation on-site, reducing post-visit admin time from hours to minutes, while producing consistent, professional outputs. Example Workflow Select repair type from dropdown Select size/measurement Input quantity App auto-generates description + price Add item to schedule Repeat for all repairs Export completed pricing document

Arduino dimming multiple led + hardware advice

I need someone who can advise on some circuitry to pulse and dim up to 28 leds for a lighting project. Chatgpt has suggested a way to do this but not exact wiring or coding. Im a furniture maker - complye novice at arduinos and coding so need stuff explaining simply.

Senior Data Engineer

We are looking for a Senior Data Engineer to serve as a technical leader within our Analytics Engineering team. In this role, you will design and build scalable data platforms and high-impact data products that power critical business decisions, analytics, and machine learning use cases. You will work cross-functionally with engineering, product, data science, and business teams to deliver reliable, high-quality data solutions while setting standards and best practices across the organization. Design, build, and maintain scalable data pipelines and data products Architect robust data models and transformation frameworks Lead end-to-end data platform initiatives (design → development → deployment) Define and implement best practices for data quality, testing, and observability Collaborate with cross-functional teams to gather requirements and deliver solutions Optimize data systems for performance, scalability, and cost-efficiency Mentor engineers and contribute to team-wide technical standards Drive adoption of modern data tools and frameworks Build reusable components and improve overall platform efficiency 5+ years of experience in Data Engineering or Analytics Engineering Strong expertise in SQL and Python Experience building and maintaining large-scale data pipelines Hands-on experience with: Cloud platforms (AWS, GCP, or Azure) Data warehouses (Snowflake, BigQuery, Redshift) Data transformation tools (dbt or similar) Workflow orchestration tools (Airflow, Dagster, etc.) Strong understanding of data modeling, ETL/ELT, and data architecture Experience with CI/CD and DevOps practices for data systems Ability to lead complex projects and work across teams Strong communication skills (technical + non-technical) Experience supporting machine learning workflows Knowledge of data governance and data quality frameworks Experience with cost optimization (FinOps) Background working in startup or high-growth environments Experience building internal data platforms or shared infrastructure Strong problem-solving and system design skills Passion for building scalable and maintainable systems Ability to work with ambiguity and drive clarity Leadership mindset with a focus on mentoring and collaboration Continuous improvement mindset with attention to quality and performance Experience with real-time data processing Exposure to data observability tools Experience designing semantic layers or metrics layers Job Skills

Full-Stack Developer (Part-Time, Remote)

We are looking for a reliable Full-Stack Developer with 2+ years of professional experience to join our remote team on a part-time basis. This role is ideal for someone who is self-motivated, communicates well in English, and can work independently while delivering clean, scalable solutions. Responsibilities * Develop and maintain web applications (frontend and backend) * Build responsive, high-performance user interfaces * Design and integrate REST APIs and third-party services * Collaborate on feature planning and implementation * Debug, test, and improve existing systems * Write clean, maintainable, well-documented code Requirements * 2+ years of full-stack development experience * Strong JavaScript skills and experience with React, Vue, or similar * Backend experience with Node.js, Python, or similar * Experience with SQL and/or NoSQL databases * Familiar with Git and version control workflows * Solid understanding of web architecture and best practices * Fluent English communication Nice to Have * Experience with AWS, GCP, or Azure * Familiarity with CI/CD and DevOps practices * Experience working remotely with distributed teams Work Details * Part-time, flexible hours * Fully remote * Long-term opportunity How to Apply Send your proposal with a short introduction and relevant experience.

Around 10 small items changing on my Wordpress Website

Hi We have an existing wordpress website and need around 10 items changing on the website such as:- * Email working and coming through * Basket taken off * Alignment issues * Other smaller issues Thanks

Frontend Developer (Angular)

About the Role: We are looking for an experienced Frontend Developer with expertise in Angular to join our dynamic team. The ideal candidate will be responsible for building and maintaining user-friendly, scalable web applications. If you're passionate about frontend development and working with cutting-edge technologies, we'd love to hear from you. Key Responsibilities: - Develop and maintain responsive web applications using Angular. - Collaborate with backend developers to integrate APIs and ensure seamless data flow. - Optimize application for maximum speed and scalability. - Implement UI/UX best practices to enhance user experience. - Participate in code reviews and follow coding best practices. - Write unit tests to ensure code reliability and maintainability. - Stay up-to-date with emerging frontend technologies and trends. Required Skills & Experience: - Strong proficiency in Angular 2+ (with deep knowledge of Angular framework concepts such as components, - services, modules, and directives). - Experience with HTML5, CSS3, and JavaScript (ES6+). - Familiarity with modern frontend build tools (e.g., Webpack, NPM). - Solid understanding of RESTful APIs and how to integrate them into a frontend application. - Proficiency in TypeScript. - Knowledge of state management tools such as NgRx or Redux. - Experience with Responsive Design and mobile-first development. - Familiarity with unit testing frameworks like Jasmine, Karma, or Jest. - Experience with version control systems like Git. - Knowledge of Agile/Scrum methodologies. Bonus Skills: - Experience with RxJS and handling asynchronous operations. - Familiarity with UI component libraries like Material UI or Bootstrap. - Experience in working with CI/CD pipelines. - Exposure to cloud platforms like AWS or Azure.

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Create enviroments in Unreal for use in an Immersive Room

We are looking into the possibility of having various enviroments with AI characters movining in the enviroment created within Unreal Engine which that we stream and project onto multiple wall and floor projectors for use within an Immersive Room. We are looking at using Touchdesigner to control everything from Serial devices for projector control and serial date received into Touchdesigner to DMX control of products using Enttec ODE/Ethergate with Artnet protocol for lighting within the room. Experince with Touchdesigner required to possibly sort an easy UI for control. Also adding interactive cameras controlling wall and floor content. Movement or particle system on walls and floor and hotspot wall areas for activation of products sound effects on the wialls. The addtion of an Interactive floor for those installs that have floor projection. Currently testing Orbbec Femto Bolt camera but open to other cameras/sensors. Have tested Slamtec RPLIDAR A1.

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Secure digital onboarding portal with Salesforce integration

We are Citipost Mail (Citipost Ltd), a UK-based B2B mail and communications provider, seeking an experienced developer or small team to build a secure digital customer onboarding portal and workflow for new business accounts. Our current process is manual and paper-heavy (Application for Credit, Agency Application Form, Customer Service Agreement and T&Cs, Direct Debit mandates). Average onboarding from application to fully signed CSA is around 15 days; we want to significantly reduce this through automation, better UX, and tighter workflow control. A core requirement is proven Salesforce CRM integration experience, as the portal must integrate with our Salesforce instance with both push and pull data flows. Scope Customer journey Sales triggers onboarding and generates a secure, unique link for the prospect. Prospect completes an online journey (standard or agency account), with conditional fields and document sets based on account type and payment method. Prospect uploads supporting documents (e.g. company letterhead, DD mandate) and signs digitally. Save-and-resume, accessible UI, and validation for key fields (company registration number, postcode, VAT, bank details). Workflow and approvals Automatic routing to Credit Control for checks and setting credit terms. Generation of the correct CSA pack (full CSA + T&Cs or CSA form + online T&Cs link) plus DD mandate where applicable. Internal counter-signature flow for Commercial/Legal. Status tracking from “Onboarding” to “Active” once fully signed and approved. Automation, dashboards, reporting Configurable email reminders for incomplete forms and unsigned CSAs/DDs, with escalation when SLAs are breached. Internal dashboards for Sales, Credit Control, and Support showing pipeline, live status, bottlenecks, and overdue tasks. Basic analytics on onboarding duration, drop-off points, and signed/returned agreement rates. Data, integrations, compliance Capture all existing form data in a structured database: company details, trading/registered addresses, VAT, contacts, services required, anticipated spend/volume, agency flags, payment terms and methods. Role-based access control and full audit trail (submissions, approvals, comments, document versions). GDPR-compliant data handling, encryption in transit and at rest, aligned to UK data standards. Salesforce integration (essential) Push onboarding data, documents, statuses, approvals, and signed milestones into Salesforce. Pull relevant Salesforce data to pre-populate forms, validate records, and avoid duplicate entry. Advise on object mapping, API approach, authentication, sync logic, and error handling. Please only apply if you can show previous work integrating a custom portal or workflow system with Salesforce CRM (bi-directional if possible). Other integrations & admin Ability to integrate with finance systems (e.g. Sage) and e-signature platforms (e.g. DocuSign, Adobe Sign). Admin interface to manage form fields, workflows, approval rules, email templates, and SLAs without code changes. Scalable, flexible architecture to support higher volumes, new product lines, and potential internationalisation. Deliverables Technical discovery and proposed architecture/tech stack. Design and build of the onboarding portal (front-end and back-end). Salesforce CRM integration (push and pull). Implementation of agreed finance and e-signature integrations. Dashboards/reporting for core onboarding KPIs. Documentation, handover, and admin training. What we’re looking for Proven experience delivering secure B2B onboarding/workflow portals with multi-step forms, approvals, and e‑signatures. Demonstrable Salesforce integration experience with a custom portal or external application. Experience integrating with CRM/finance systems and e-signature tools. Strong understanding of data security, GDPR, and role-based access. UK-based or very familiar with UK data protection and compliance. Please include in your response Links/examples of similar portals or Salesforce-integrated workflow systems you’ve built. Details of your Salesforce integration experience (including any bi-directional integrations). Proposed tech stack and approach. Estimated timeline and ballpark budget for an MVP aligned to this scope.

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Shopify Developer Needed for Custom eCommerce Functionality

We’re looking for an experienced Shopify developer for ongoing work across multiple eCommerce projects. This role is focused on building high-quality, custom functionality. Not just editing themes. You’ll be responsible for: Building custom Shopify sections and widgets beyond standard theme capabilities Turning design briefs into pixel-perfect, fully functional builds Creating bespoke content rows and layouts based on design specs (Figma) Implementing custom promotional logic such as “spend £X, get Y”, tiered offers, and conditional incentives Enhancing and extending Shopify functionality where needed Writing clean, scalable code using Liquid, JavaScript, HTML, and CSS Ensuring strong performance and fast-loading storefronts

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Mobile App Project – North America Developers Preferred!

I am looking for a talented and creative mobile app developer to help complete an existing project in the healthcare industry. This app is already 40% complete, and you will collaborate with a small team of developers to bring it to full launch. About the Project: Platform: iOS and Android (built with Flutter for cross-platform efficiency) Goal: Develop a user-friendly patient management app that allows patients to track appointments, access medical records, and communicate securely with healthcare providers. Current Status: 40% developed; collaboration with 1–2 other developers required Design: Wireframes and partial codebase available; your input on UI/UX improvements is encouraged What I’m Looking For: Experienced mobile app developers with a portfolio of live apps Healthcare industry experience preferred Ability to write clean, maintainable, scalable code Strong understanding of app performance, security, and usability Excellent communication and teamwork skills Bonus Points: Experience with backend integration (APIs, Firebase, or SQL databases) Knowledge of push notifications, analytics, and app store deployment Creative suggestions to enhance user experience Why Work on This Project? Collaborate with a small, motivated team Contribute to a high-impact healthcare app Flexible collaboration and prompt payment for quality work If you are a passionate developer ready to make a difference in healthcare, send me your proposal including: Brief introduction & experience Examples of previous apps you’ve built (healthcare apps preferred) Estimated timeline and cost Let’s complete this app and create something amazing together!

MERN Stack Developer

Job Description: We are looking for an experienced MERN Stack Developer to build and maintain scalable web applications using MongoDB, Express.js, React, and Node.js. You will be responsible for both frontend and backend development, working closely with our team to deliver high-quality products. Responsibilities: - Develop and maintain web applications using React, Node.js, and Express.js - Design and manage databases using MongoDB - Build RESTful APIs and integrate third-party services - Write clean, maintainable, and efficient code - Debug and optimize applications for performance - Collaborate with designers and other developers Requirements: - Strong experience with JavaScript (ES6+) - Proven experience with the MERN stack - Understanding of REST APIs and authentication (JWT, OAuth) - Experience with Git and version control - Ability to work independently and meet deadlines Nice to Have: - Experience with TypeScript - Knowledge of cloud platforms (AWS, Vercel, etc.) - Familiarity with Docker or CI/CD pipelines