Javascript And Jquery Projects

I need a full stack blockchain developer

We are building a Web3 NFT-based minting & staking project using React, JavaScript, and blockchain integrations. The current version is a functional prototype that simulates core game mechanics and user flows. While it's not production-ready, it sets a strong foundation for blockchain gaming with staking and NFT minting mechanics. We’re planning to launch our MVP in about 1–2 months. Can we do a short trial technical assessment just before start? for 5-10 mins minor changes

Full-Stack Developer for E-Commerce Landing Page

We need an experienced Full-Stack Developer to build a responsive e-commerce landing page from finalized Figma designs. ​Responsibilities ​Translate Figma designs into clean, semantic HTML5, CSS3, and JavaScript. ​Set up a basic backend to securely handle user sign-ups and contact form submissions. ​Integrate a secure payment gateway (Stripe or PayPal API) for a smooth, single-product checkout flow. ​Optimize the landing page for fast loading speeds and ensure flawless mobile responsiveness. ​If you have experience building clean, fast e-commerce landing pages, we want to hear from you! Please submit your proposal alongside a few links to your recent work. We look forward to reviewing your application!

Beginner Programmer Needed for Short-Term Implementation

Beginner programmer sought for short-term implementation. Project logic is complete; tasks involve typing code in VS Code, implementing UI components and integrating APIs using React and TypeScript. Remote work with collaborative GitHub workflow. Budget: $3/hour. Requirements: basic JavaScript/TypeScript knowledge, attention to detail, ability to follow instructions, and access to VS Code and GitHub. Applicants should include a brief introduction, coding examples such as school projects, and indicate available daily hours.

Client-Facing Technical Consultant

We are looking for a professional English speaker with a technical background to represent our engineering team during client meetings, project discussions, and technical interviews. The ideal candidate should have excellent verbal communication skills, be comfortable speaking with US-based clients, and possess a basic understanding of software development concepts and modern technologies. ### Responsibilities * Attend client meetings and technical discussions. * Communicate project requirements and technical concepts clearly in English. * Participate in technical interviews and screening calls. * Present engineering experience and project work professionally. * Coordinate with our internal engineering team before and after meetings. * Take notes, gather requirements, and provide meeting summaries. * Maintain a professional presence when interacting with clients and stakeholders. ### Requirements * Native or near-native English speaking ability. * Strong communication and presentation skills. * Basic understanding of software development concepts. * Familiarity with technologies such as JavaScript, React, Node.js, Python, Java, .NET, AWS, or similar is a plus. * Reliable internet connection and professional work environment. * Ability to attend meetings during US business hours. ### Preferred Qualifications * Previous experience in software engineering, QA, DevOps, business analysis, technical sales, or customer-facing technical roles. * Experience participating in technical interviews or client-facing discussions. * Familiarity with Agile/Scrum environments. ### Compensation * $20–$50+ per hour depending on experience and communication skills. * Flexible payment schedule (weekly or monthly). * Long-term collaboration opportunities available.

Oxygen Website Developer Required – Ongoing Freelance Work

Smart Design UK is a growing web design and digital marketing agency based in Ashford, Kent, and we are looking for an experienced Oxygen Builder Developer to assist with the production of WordPress websites on an ongoing freelance basis. About the Role We already handle the design, planning, content creation, and client communication. We are looking for a developer who can take our completed wireframes, layouts, and content and accurately build them within Oxygen Builder. This is not a design role. Instead, we require someone who can efficiently translate our supplied specifications into clean, responsive, and professional websites. What We Will Provide Website wireframes and layouts Written content Images and media assets Project specifications and build requirements Ongoing support and clarification where required What You Will Be Doing Building WordPress websites using Oxygen Builder Following supplied wireframes and layouts accurately Creating responsive designs that work across desktop, tablet, and mobile devices Ensuring builds meet our internal quality standards Implementing basic animations, layouts, and styling where specified Returning completed websites for final review and client approval Essential Skills Strong experience with WordPress Proven experience using Oxygen Builder Good understanding of responsive web development Knowledge of HTML, CSS, and basic JavaScript Ability to follow detailed specifications and instructions Excellent attention to detail Ability to meet agreed deadlines Desirable Skills Experience with WooCommerce Understanding of page speed optimisation Experience working with custom code snippets Familiarity with SEO-friendly website structures Working Relationship We are looking to establish a long-term relationship with a reliable freelancer or development company who can become an extension of our team as our workload continues to grow. Further details regarding our build process, quality requirements, and project workflow will be discussed with shortlisted applicants. To Apply Please provide: Examples of Oxygen Builder websites you have built Details of your experience with WordPress and Oxygen Your typical turnaround times Your preferred pricing structure (hourly or per project) We look forward to hearing from experienced Oxygen developers interested in ongoing freelance work.

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.

Software Engineer — AI Benchmark & Test Developer (Remote, EST)

Experienced Software Engineer needed to develop AI coding benchmarks: analyze real GitHub PRs, implement robust fixes, author rigorous tests, and craft clear LLM evaluation prompts within reproducible Docker environments. Follow a disciplined 7-step workflow—review PRs, run and validate repos in Docker, implement golden solutions on a dedicated branch, write fail-to-pass tests, compose metadata and prompt variants, and open a three-commit PR. Must be available during EST business hours, proficient in multiple languages (e.g., Python, JavaScript/TypeScript, Go, Ruby, Java), skilled with Git, testing frameworks, Docker, and CI. Ideal candidates practice meticulous TDD, contribute to open source, and communicate proactively, producing high-quality, reproducible deliverables validated by automated checks.

opportunity

Creation of an AI agent for Claude (Opus 4.8)

Build an AI Web & WhatsApp Chatbot (Node.js + Claude API) We're a company looking for an experienced developer to build a customer-facing AI chat assistant powered by Anthropic's Claude API, running on both our website and WhatsApp Business. The assistant answers visitor questions using content drawn exclusively from our own website, captures contact details, and emails each completed conversation to our team so they can follow up. This is a self-contained, end-to-end build with clear, documented deliverables. Scope of work: A Node.js + Express backend that calls the Claude API, keeping the full conversation server-side and never exposing credentials to the browser. A lightweight, embeddable web widget: a floating launcher that invites visitors to ask, a branded chat panel, a custom agent name and logo, and a welcome message. A WhatsApp Business integration through Meta's official Cloud API: webhook verification, message send/receive, and per-user session handling, reusing the same core logic as the web agent so both channels behave consistently. A retrieval-augmented (RAG) layer that crawls our sitemap on a nightly schedule, indexes the entire site, and grounds every answer in that content, with strict anti-hallucination rules that direct users to a contact address when information isn't available. Automatic email delivery of each transcript through our SMTP server (Postfix, SSL) on both channels, sent when a conversation finishes. Spam and abuse protection: rate limiting, honeypot fields, input validation, and a configurable daily cost cap to protect the API budget. Requirements: strong JavaScript/Node.js, solid experience with REST APIs and LLM integration, familiarity with embeddings and RAG pipelines, the WhatsApp Business Cloud API, SMTP configuration, and sound security practices. GDPR awareness is a plus. Deliverables: production-ready, documented code with full setup instructions. Generic placeholders are provided for all company-specific values, so configuration is straightforward. Please send a brief proposal, relevant work samples, and your estimated timeline and budget.

opportunity

WordPress developer to build a subscription-based platform

PROJECT BRIEF: BeyondTheSpec.co.uk — Subscription Platform Build Beyond the Spec is a subscription-based A-Level Psychology revision platform for UK students and teachers, run by a single operator (a psychology teacher and A-level examiner with 20+ years' experience). Launch deadline: end of August 2026. The content already exists. Over 96 polished interactive HTML quiz and flashcard files are ready, along with PDFs, cheat sheets, and worksheets. I need a developer to build a clean, professional platform to deliver this content to paying subscribers. REQUIRED FEATURES FOR LAUNCH User Accounts Student and teacher registration and login Two account types: Individual and School/Department School accounts can manage multiple student logins under one licence Subscription & Payments Monthly and annual billing via Stripe Three tiers: Free, Standard, and Premium School/department licence option Owner can manage pricing without developer help Content Delivery Interactive HTML files must render natively on the page (not as downloads) PDFs available to download YouTube videos embedded within topic pages Content locked by subscription tier Content organised by unit and topic Student Progress Tracking Quiz scores saved against each student's account Students can see which topics they've attempted and their scores over time Simple progress dashboard per unit Note: owner does not need to view individual scores at launch School Account Tracking School licence holders can view basic progress data for their students Simple summary per student: topics attempted, scores, dates Design Clean, professional, mobile-responsive design Colour-coded unit navigation (codes provided) Owner will supply logo and brand assets IMPORTANT TECHNICAL NOTE My HTML quiz files calculate and display scores internally using JavaScript. The platform needs to capture these scores and save them against the student's account. Please explain in your proposal how you would solve this. FUTURE FEATURES (not needed at launch — awareness only) AI essay marking, real-person marking workflow, live tutor session booking, student-created flashcards, expanded school analytics. TIMELINE & BUDGET Launch deadline: end of August 2026 Budget: around £500 Ongoing: small retainer or ad hoc basis for occasional updates YOUR PROPOSAL SHOULD INCLUDE Confirmation you can deliver all launch features above How you would handle score capture from the HTML files Your proposed technology stack Fixed price or detailed estimate Examples of similar subscription/membership sites you've built How I would upload new content myself after handover Serious enquiries only — please read this brief carefully before responding.

Shopify developer with strong frontend/UI and CRO experience

We are looking for an experienced Shopify developer (preferably with strong frontend/UI and CRO experience) to build a custom curtain calculator/configurator for our Shopify store. The goal is to create a highly user-friendly, SEO-friendly and conversion-focused calculator that allows customers to easily configure and purchase custom curtains directly on our website. IMPORTANT: We strongly prefer a custom-built solution without relying on external apps, unless absolutely necessary. The calculator should be lightweight, fast, scalable, and fully integrated into our existing Shopify theme/design. Main Objective: Customers should be able to: • Configure their curtains step-by-step • Instantly see pricing updates based on formulas • Easily understand options and pricing • Add products directly to cart and checkout • Order free fabric samples/swatches through a dedicated CTA/button The configurator must feel premium, modern, minimal, and visually aligned with our Shopify branding/theme. Core Calculator Features: The pricing and calculations should dynamically adjust based on: • Width • Height • Pleat type • Pleat factor • Curtain division/layout • Delivery type • Delivery costs The system should calculate prices automatically using custom formulas. Functional Requirements: • Dynamic live price calculation • Responsive/mobile-first design • Clean UX/UI with clear customer flow • Fast loading speed • Fully integrated into Shopify product/cart/checkout flow • Editable formulas/settings from backend if possible • Validation for incorrect measurements/input • Optional visual explanations/tooltips for customers • SEO-friendly structure and performance optimization • Conversion-focused structure to maximize completed purchases Conversion Optimization Requirements: We want the configurator to increase trust and conversion rates through: • Clear pricing transparency • Smooth checkout flow • Modern premium design • Smart CTA placement • Minimal friction • Clear overview before checkout Extra conversion features: • Sticky “Add to cart” or “Continue” buttons • Visual progress indicator • Mobile optimized experience • Optional upsell/cross-sell suggestions • Trust elements/reviews integration if relevant Free Sample Feature: A separate CTA/button should allow customers to easily request free fabric samples/swatches directly from the configurator or product page. Technical Preferences: • Shopify Liquid • JavaScript • Custom coding preferred over heavy third-party apps • Strong understanding of Shopify theme architecture • Experience with custom product configurators/calculators • Performance optimization knowledge Required Skills: • Shopify development • Shopify Liquid • JavaScript / frontend development • UX/UI design • Conversion Rate Optimization (CRO) • SEO best practices • Experience building custom calculators/configurators • Strong understanding of responsive design Bonus Skills: • Experience in custom/interior/furniture ecommerce • Experience with dynamic pricing engines • Experience improving webshop conversion rates Important: We value transparent communication, proactive thinking, and someone who truly understands both technical development and conversion-focused ecommerce design. We are looking for a long-term partner who can help optimize and scale our webshop experience.

Long-Term Website & Mobile Developer

Our company is a fast-growing tech startup focusing on innovative web and mobile solutions. We are looking for a skilled developer to join our team for long-term collaboration, building and maintaining high-quality web and mobile applications. We are seeking a dedicated Website & Mobile Developer to design, develop, and maintain both web and mobile applications. The ideal candidate is experienced in front-end and back-end development, mobile platforms (iOS/Android), and is comfortable working on projects from concept to deployment. This is a long-term role with opportunities to contribute to strategic product planning and technical architecture. Key Responsibilities - Develop, test, and maintain web applications (desktop and mobile responsive). - Develop, test, and maintain native and/or cross-platform mobile applications (iOS/Android). - Collaborate with UI/UX designers to create engaging user experiences. - Write clean, maintainable, and efficient code following best practices. - Troubleshoot, debug, and optimize applications for performance and scalability. - Integrate third-party APIs and services as needed. - Maintain version control and documentation for all projects. - Participate in code reviews and provide constructive feedback. - Stay updated with emerging technologies, frameworks, and industry trends. Requirements - Proven experience in web development (HTML, CSS, JavaScript, frameworks like React, Angular, Vue). - Experience with back-end technologies (Node.js, PHP, Python, Ruby, Java, or similar). - Mobile development experience: - Native: Swift (iOS), Kotlin/Java (Android) - Cross-platform: React Native, Flutter, or similar - Experience with databases (SQL, NoSQL) and RESTful APIs. - Familiarity with version control systems (e.g., Git). - Strong problem-solving skills and attention to detail. - Ability to work independently and in a team. - Good communication skills in American English. Preferred Qualifications - Experience with CI/CD pipelines and cloud deployment (AWS, Azure, Firebase, etc.). - Knowledge of Progressive Web Apps (PWAs). - Experience with Agile/Scrum development methodologies. What We Offer - Long-term collaboration with a growing team. - Flexible working hours and remote work options. - Opportunities to work on innovative projects and learn new technologies. - Competitive salary and performance-based bonuses.

Senior Full stack developer

We work remote by default – focused, efficient, and with full ownership. For larger features, architectural decisions, and real brainstorming sessions, we come together in Berlin – fast, hands-on, and without unnecessary meeting overhead. We use AI to accelerate – not to replace thinking. We design the system, steer the output, and take responsibility for what we ship. Fast where it makes sense. Careful where it matters. Your mission You’ll join our UI Engineering team and take ownership of full-stack projects that power our adtech ecosystem. This isn’t just about coding – it’s about collaboration, technical ownership, and making an impact. Here’s what your day might look like: Build and maintain modern React frontends and Node.js APIs with TypeScript. Design and implement REST or GraphQL APIs that scale efficiently. Collaborate closely with backend engineers, designers, and product owners to translate requirements into elegant solutions. Write clean, maintainable, and well-tested code – with automated tests as a natural part of your workflow. Contribute to architecture decisions and best practices – we value opinions backed by experience. Your skills 5+ years of hands-on experience in full-stack JavaScript development. Deep knowledge of Node.js (framework e.g. Koa, Express or Fastify), TypeScript, React and modern web architectures. Solid understanding of relational databases (e.g. MySQL, MariaDB, PostgreSQL or SQL Server), including database design, SQL querying, and REST API development (GraphQL is a plus). A strong sense of code quality with mandatory hands-on experience in testing, including frameworks such as e. g. Jest, Vitest, or Node’s built-in testing framework – Clean design and automated tests are not optional. Bonus points for experience with: AWS, Jenkins, Grafana, Graylog, Confluence, Jira, Shell scripting

Smart Contract Developer - Blockchain Defi APP

The future of Web3 starts with you — join us as a Blockchain / Web3 Developer! Requirements 3+ years of software development experience 1–2+ years of experience in blockchain, Web3, crypto, or DeFi projects Strong experience with Solidity and smart contract development in the EVM ecosystem Good understanding of Ethereum / EVM architecture, gas optimization, token standards, and smart contract security Experience with Web3 tools such as Hardhat, Foundry, Remix, MetaMask, Ethers.js, Web3.js, Viem Experience deploying and maintaining smart contracts on testnet and mainnet Knowledge of DeFi: AMMs, staking, lending, bridges, oracles, stablecoins, and liquidity pools Backend integration experience: APIs, indexers, event listeners, wallets, or transaction services Understanding of common blockchain security risks Experience with JavaScript, TypeScript, Python, Node.js, or similar backend technologies Familiarity with Git, CI/CD, testing frameworks, code reviews, and documentation Responsibilities Design, develop, test, and deploy smart contracts for Whitechain and Web3 products Build blockchain features for DeFi platforms, wallets, GameFi, and ecosystem tools Write secure and gas-efficient Solidity code Create unit tests, integration tests, and deployment scripts Integrate smart contracts with backend services, frontend apps, wallets, APIs, and blockchain infrastructure Review existing smart contract code and suggest improvements Support audits, security reviews, and vulnerability remediation Monitor deployed contracts and help resolve production issues Research new blockchain protocols, DeFi mechanics, and EVM improvements Contribute to technical documentation and best practices Nice to Have Experience with L1 / L2, rollups, bridges, validators, nodes, or RPC infrastructure Experience with audit tools such as Slither, Mythril, Echidna, Tenderly, or OpenZeppelin Defender Knowledge of The Graph, SubQuery, custom indexers, or blockchain analytics pipelines Experience with account abstraction, cross-chain protocols, or oracle integrations Open-source Web3 contributions or a public GitHub portfolio Understanding of tokenomics, staking, governance, or protocol economics Experience in fintech, crypto exchange, DeFi, wallet, or Web3 infrastructure companies If you are passionate about Solidity, EVM, DeFi, and building reliable Web3 products, we would be happy to hear from you.

opportunity

Power Apps UX/UI Specialist – Matrix Interface

We are looking for an experienced Microsoft Power Apps UX/UI specialist to assist with designing and developing a custom registration matrix interface within a Microsoft Power Platform solution. The platform is used to manage fund registrations across multiple jurisdictions and currently operates using Dataverse and model-driven apps. We require a more scalable and user-friendly matrix-style interface for operational users. The existing standard model-driven grid functionality has limitations with horizontal and vertical scrolling, freeze pane/fixed column behaviour, usability for large matrices, dynamic hiding/showing of columns, and overall UX when working with high-volume registration data. We are exploring a custom Canvas App, Custom Page, or PCF-style approach and are looking for someone with strong experience designing advanced Power Apps interfaces and data-driven matrix/grid layouts. Scope of Work The successful contractor will assist with designing a scalable matrix-style UI within Power Apps, creating a responsive scrolling interface, implementing fixed identifier columns (freeze-pane style behaviour), dynamically hiding columns where no data exists, improving usability for large datasets, advising on the best technical approach (Canvas App vs PCF vs Custom Page), working with Dataverse tables and relationships, supporting UX optimisation for operational users, and potentially implementing proof-of-concept components. The solution will need to support Funds, Sub-Funds, Share Classes, jurisdiction/registration locations, and registration statuses and dates. Technical Environment Current technology stack includes Microsoft Power Platform, Dataverse, Model-Driven Apps, Power Apps Grid Control, JavaScript, Power Automate, and Microsoft 365. Experience with PCF Controls, React/TypeScript, advanced Canvas App design, responsive Power Apps layouts, complex Dataverse-driven interfaces, and grid or matrix-style UI implementations would be highly advantageous. Deliverables Initial engagement would focus on UX/UI review and recommendations, proposed technical approach, wireframe or mock-up design, working prototype/proof of concept, and recommendations for scalable implementation. There is potential for follow-on implementation work depending on outcome. Ideal Candidate We are looking for someone with strong experience in Power Apps UX/UI design who has built advanced/custom interfaces beyond standard model-driven forms, understands Dataverse architecture, can advise pragmatically on platform limitations, has experience building matrix/grid-style interfaces, and can demonstrate similar previous work. Additional Information This is a professional/legal services environment, so usability, scalability, and maintainability are important. We are not looking for a basic form redesign; the requirement is for a more sophisticated operational interface for managing large volumes of registration data efficiently.