Hire the Best Jest Developers

Clients rate our Jest Developers
Rating is 4.7 out of 5.
4.7/5
Based on 255 client reviews
Bhumi G.

Surat, India

$15/hr
5.0
34 jobs

✅ Top Rated Awarded by Upwork (Top 10%) ✅ Helped 38+ Global Clients ✅ 10,200+ Hours Worked ✅ Fast, Friendly & Attention to Detail ✅ Result Oriented ✅ Budget Friendly ✅ Free Consultation Hi, I’m Bhumi, I’m a full-stack web developer with 6+ years of experience working with startups, founders, and small businesses to build modern, scalable, and easy-to-use web applications. I build fast, responsive front-ends using REACT, NEXT.JS, AND TAILWINDCSS, and I’m equally confident in back-end with tools like NODE.JS, NEST.JS, SUPABASE, AND POSTGRESQL. I focus on writing clean, maintainable code, keeping communication clear and consistent, and making sure the work I do actually moves things forward for your business. 𝗪𝗛𝗔𝗧 𝗜 𝗢𝗙𝗙𝗘𝗥: ✅ Custom Web App Development ✅ React / Next.js Frontend ✅ Node.js / Nest.js Backend ✅ API Design & Integration (REST, GraphQL, Third Party Integrations) ✅ Database Design (SQL, NoSQL) ✅ Fixing Bugs, Refactoring Code ✅ Ongoing Support & Feature Additions 💬 𝗨𝗣𝗪𝗢𝗥𝗞 𝗖𝗟𝗜𝗘𝗡𝗧 𝗦𝗛𝗔𝗥𝗘𝗗 𝗧𝗛𝗘𝗜𝗥 𝗘𝗫𝗣𝗘𝗥𝗜𝗘𝗡𝗖𝗘 𝗪𝗜𝗧𝗛 𝗠𝗘: ★★★★★ 5.0 "Bhumi is one of the best developers I've had the privilege to work with. She is very professional and has excellent communication skills. She works very fast and is very efficient with the hours that she puts in. Her work is excellent, code is clean, and she gets the job done. I have zero complaints. If the task is within her skill set, hands down she is the best." - Roger R. ★★★★★ 5.0 "Only the best experience! Our project has advanced a lot with Bhumi's support." - Olga G. ★★★★★ 5.0 "Bhumi was an absolute pleasure to work with and a true asset to the project. Her work speed is exceptional; she consistently turned around tasks very quickly, regardless of their complexity. What really stood out was her fantastic attitude – she readily accepted feedback and handled revisions or changes (even last-minute ones from the client) professionally and without any pushback, simply focusing on getting the work done efficiently. Communication was excellent; Bhumi was always clear about her availability, so managing the workflow was effortless. I knew I could assign her tasks and trust they would be completed reliably and rapidly. Furthermore, she possesses a great eye for design. After establishing the initial look and feel, Bhumi demonstrated a strong ability to extend the design language to new components autonomously, maintaining aesthetic consistency beautifully and saving us considerable time on creating detailed mockups. She's incredibly easy to collaborate with, responsive, and highly skilled. I wouldn't hesitate to hire Bhumi again and give her my highest recommendation." - Ruben R. ★★★★★ 5.0 "We are happy with the Bhumi's work! I should admit that all the deliverables we get are of the high quality including solutions for quite complex tasks. Also what is very important for us is that Bhumi is responsible and stable, understands priorities and gives the result. Well done!" - Andrey O. ★★★★★ 5.0 "It's a pleasure for us to work with Bhumi! Tasks are always delivered on time with high standards. We also really appreciate her flexibility and communication skills!" - Anna P. 🎯 𝗠𝗬 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘 (𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗮𝗹, 𝗠𝗼𝗱𝗲𝗿𝗻, 𝗥𝗲𝗹𝗶𝗮𝗯𝗹𝗲): 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 - React.js, Next.js, Vite - Chakra UI, MUI, Ant Design - Tailwind CSS, Shadcn - TypeScript, JavaScript 𝗦𝘁𝗮𝘁𝗲 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 - Redux Toolkit, React Query, Context API - Zustand 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 - REST APIs, GraphQL APIs, WebSockets - Stripe, Firebase, OpenAI, Auth0, Twilio 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 - Node.js, Express.js - MongoDB, PostgreSQL, Redis - Supabase, Firebase, Serverless Functions 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁 - Vercel, Netlify, AWS (EC2, S3, Lambda) - Docker, GitHub Actions, Railway 𝗔𝗜 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 - OpenAI, Claude, Bolt.new, Cursor - Custom chatbots, task automation, AI-driven features 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 & 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 - Jest, Cypress - OAuth, JWT, Role-based Access 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 & 𝗧𝗼𝗼𝗹𝘀 - Jira, Trello, ClickUp, Asana - Git, GitHub, Bitbucket - Slack, Teams, Discord 💬 𝗙𝗥𝗘𝗘 𝗖𝗢𝗡𝗦𝗨𝗟𝗧𝗔𝗧𝗜𝗢𝗡: I offer a 𝗙𝗥𝗘𝗘 initial consultation, even if we don’t work together, you’ll leave the call with ideas or suggestions that can help. Ready to start? 𝗖𝗹𝗶𝗰𝗸 𝐈𝐧𝐯𝐢𝐭𝐞 𝐭𝐨 𝐉𝐨𝐛 OR 𝗦𝗲𝗻𝗱 𝗮 𝐌𝐞𝐬𝐬𝐚𝐠𝐞, and let’s explore how I can bring value to your project. Best Regards, Bhumi Full Stack Web Developer (React | Node.js | Next.js | TypeScript, Javascript)

  • Jest
  • Full-Stack Development
  • Material UI
  • React
  • Next.js
  • Redux
  • MERN Stack
  • Front-End Development
  • HTML
  • CSS
  • Back-End Development
  • Node.js
  • ExpressJS
  • SQL
  • MongoDB
Andrew C.

Lynchburg, Virginia

$85/hr
4.9
39 jobs

I build production-ready applications for startups and SaaS companies, with deep expertise in Supabase, Stripe, and modern full-stack architecture. My recent work includes AI voice agents, multi-tenant marketplaces, and workflow automation systems handling real users and real payments at scale. I help founders launch MVPs that are built to grow, not just built to work. I deploy custom builds in 3-6 weeks, ready to onboard users. Tailored to your market, whether SaaS, marketplace, or startup. Key Achievements: TikTok Creator Marketplace Built a production marketplace that generated 100M TikTok views and distributed $15,000 to 200+ creators: - Dual payment processing (Stripe Connect for brands, PayPal for creators) - TikTok API integration with Apify web scraping for campaign data - Trigger.dev automation scaling email campaigns to 1000+ creators - Multi-tenant architecture with proper data isolation AI Voice Agent System Production voice agent conducting structured assessments (9 sections, 22 subsections): - Eleven Labs voice integration with real-time database sync - Hybrid validation where AI verifies manual input and asks follow-up questions - Transcript processing extracting structured insights from conversations - Deployed to production handling automated data collection at scale Mental Health RAG Chatbot - Built multi-tenant SaaS with RLS policies protecting customer data - Auth flows with MFA enforcement and session management - Vector DB + RAG for AI-powered features, with chat context and transcribed therapy sessions By leveraging AI tools like Claude Code, modern frameworks, integrations like Supabase and Stripe, and a collaborative approach, I’ve consistently delivered high-quality solutions faster and more efficiently. I take app ideas in any niche from clients, and spec and build out an infrastructure and user experience from scratch. My experience includes teaching two web development boot camps, and providing ongoing guidance to developers seeking consistent support and measurable progress. I enjoy communicating to non-coders about my implementations in ways they can understand them. I excel at: - Collaborative problem-solving: Working closely with designers, developers, and stakeholders to deliver features that balance technical precision and user experience. - Building dynamic marketplaces with real-time data tracking and automated payments. - Full-stack development with a focus on Supabase, React, Node.js, and API integrations. - Impact-driven solutions: Leveraging my skills and tools to meet deadlines, exceed expectations, and contribute measurable value to your projects. Core Stack: - Frontend: React, Next.js, React Native, Tailwind CSS - Backend: Supabase (Postgres, RLS, Edge Functions, Auth, Storage, Vector DB, RAG) - Payments: Stripe (Connect, Subscriptions), PayPal API - AI: OpenAI, Claude, Eleven Labs, vector databases, RAG - Automation: Trigger.dev, n8n, Zapier workflow orchestration - Infrastructure: Vercel, AWS, Railway AI-Assisted Development: Claude Code, Cursor (delivering 2-3x faster without sacrificing quality) What Makes Me Different? - Efficiency with AI: I use modern tools like Cursor AI to deliver faster, more cost-effective solutions, allowing you to focus on what matters most. - Attention to detail: I ensure designs are perfect across all devices, creating engaging, accessible experiences for your users. - Results-oriented mindset: My goal is to help you achieve measurable business outcomes through technical excellence. Ready to launch? Whether it’s a mobile app, a marketplace, or just hooking up Supabase and Stripe, I’ll help you ship faster and with confidence.

  • Jest
  • React
  • TypeScript
  • HTML
  • CSS
  • JavaScript
  • Redux
  • GraphQL
  • Front-End Development
  • REST API
  • AWS Amplify
  • Next.js
  • Material UI
Dariia L.

Surrey, Canada

$40/hr
5.0
40 jobs

I have 6 years of experience with a huge skill set in web development. • Server-side Languages & Technologies: Node, PHP, Java • SSP Frameworks: Next.js • Database&ORM: MySql, Postgres • Template Engines: Blade, EJS • Backend Frameworks: Express, Laravel, Rails • JavaScript Frameworks: React, Vue • HTML/CSS (incl SCSS) • Testing: Jest, Mocha, Chai, Cypress • AWS, Google Cloud • Version-control: Git, Bitbucket • Jira, Trello, SlickPlan, Workamajig • CMS & E-commerce integrations: WordPress, WooCommerce, MemberPress • Marketing & SEO: Google Analytics, Google Tag Manager, page speed optimization I respond within 24 hours.

  • Search Engine Optimization
  • WordPress
  • WordPress Development
  • Search Engine Marketing
  • HTML
  • Web Testing
  • JavaScript
  • CSS 3
  • HTML5
  • Custom PHP
  • Usability Testing
  • Website
Erik N.

Palm Desert, California

$75/hr
5.0
23 jobs

I'm a principle software engineer with over a decade of experience designing, developing, and deploying complex web applications and APIs. I have deep expertise in front-end, back-end, and DevOps, and love working across the full stack. Key skills I bring to the table: - Front-End Development: React, Next.js, Svelte, Vue.js, Nuxt.js, TypeScript, Material UI - Back-End & API Development: Node.js (Express, Nest), Python (Flask, Django, FastAPI), PHP (Laravel), Ruby on Rails - Cloud & DevOps: AWS, Azure, GCP, Docker, Kubernetes, CI/CD, TDD, Agile methodologies - Data & Machine Learning: Power BI, Tableau, TensorFlow, PyTorch, scikit-learn - Database Management: MySQL, PostgreSQL, MongoDB, DynamoDB, Supabase - Design & Copywriting Recent client work highlights: -Mobile Apps (React Native) -AI training, deployment and integrations - Google Chrome Extensions - Enterprise Next.js website (App Router) - Crypto Payment rails - Led teams of international developers I look forward to the opportunity to bring my expertise and passion to your project. Let's hop on a call and chat about how I can help!

  • Jest
  • Python
  • JavaScript
  • React
  • Node.js
  • ExpressJS
  • Firebase
  • HTML
  • CSS
  • MongoDB
  • TypeScript
  • Next.js
  • GitHub
  • API Development
  • Front-End Development
Nimish T.

Jaipur, India

$20/hr
4.9
80 jobs

Top Rated full-stack developer — $70K+ earned, 1,643+ hours, 94% Job Success across 68 Upwork projects. I lead a 30+ person engineering team at Craxinno Technologies (founded 2017). We've shipped 100+ web apps, mobile apps, and digital products for founders, agencies, and enterprise clients worldwide. Our core stack: React, Next.js, Node.js, TypeScript, Express.js That's where we spend most of our time. We build fast, type-safe, SEO-friendly web applications, SaaS dashboards, internal tools, and marketing sites that hold up at scale. Our own site runs on Next.js + Node.js + TypeScript — we use what we ship. Technologies we work with daily (across 109+ in our stack): • Frontend — React, Next.js, TypeScript, JavaScript, Tailwind CSS, Redux, Zustand, HTML5, CSS3, SASS • Backend — Node.js, Express.js, NestJS, REST APIs, GraphQL, WebSockets • Databases — PostgreSQL, MongoDB, MySQL, Redis, Firebase, Supabase, Prisma • DevOps & Hosting — AWS, Vercel, Docker, CI/CD, GitHub Actions, Nginx • Mobile — React Native, Flutter, Swift, Kotlin • CMS & E-commerce — WordPress, Elementor Pro, Shopify (Liquid, custom apps) • Design — Figma, Adobe XD (UI/UX design, prototyping, design systems) • QA — Jest, Playwright, Cypress, Postman Services we offer 1. Web App Development — Next.js / React SaaS, dashboards, internal tools, marketing sites 2. Mobile App Development — React Native, Flutter, and native (Swift / Kotlin) builds 3. UI/UX Design — Figma-first design with pixel-perfect handoff to code 4. API & Backend Development — Node.js / Express / NestJS APIs, third-party integrations 5. E-commerce — Shopify storefronts and custom apps 6. WordPress — pixel-perfect Figma-to-Elementor Pro builds when CMS flexibility matters 7. DevOps & Maintenance — AWS/Vercel deployment, monitoring, ongoing support Why clients keep coming back • Strong, type-safe codebases — TypeScript end-to-end means fewer production bugs and easier handoffs • Pixel-perfect from Figma — your design is the spec, not a suggestion • Async-friendly delivery — Loom walkthroughs at each milestone, 0–4 hour response time • A full team behind one point of contact — you talk to me, but you get the bandwidth of a 30+ person studio • 5-star reviews across the board — clients consistently call out communication, speed, and clean code Let's talk Whether you have a Figma file, a half-built repo, or just an idea — send it over. I'll review it and tell you honestly whether we're the right fit and how I'd approach it. Thanks for reading, Nimish Taneja Founder, Craxinno Technologies

  • Angular
  • iOS Development
  • MySQL
  • TypeScript
  • Node.js
  • PHP
  • Swift
  • Next.js
  • Sass
  • Full-Stack Development
  • Tailwind CSS
  • HTML
  • WordPress
  • Front-End Development
  • Website Redesign
Syed Ahmed H.

Karachi, Pakistan

$15/hr
5.0
10 jobs

I specialize in cross-platform mobile development using React Native (both Expo and Bare workflows) with over 5 years of hands-on experience. I write clean, maintainable JavaScript and TypeScript (ES6+) code and work with advanced state management tools like Redux, Redux-Saga, React Context API, and React Hooks to create scalable app architectures. I focus on clean, tested, and maintainable code that’s built to scale — creating user experiences that are not only beautiful and intuitive but also keep your users coming back. 𝗪𝗵𝗮𝘁 𝗜 𝗢𝗳𝗳𝗲𝗿: 5+ years of mobile development experience 20+ apps built and deployed Full-cycle development: from idea to launch Fast, friendly communication & regular progress updates Emphasis on UI/UX, performance, and long-term maintainability 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝗟𝗮𝗻𝗴𝘂𝗮𝗴𝗲𝘀 & 𝗦𝘁𝗮𝘁𝗲 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 JavaScript / TypeScript (ES6+) Redux, Redux-Saga, Redux-Thunk React Context API, React Hooks Flutter BLoC, Riverpod 𝗔𝗣𝗜 & 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 RESTful APIs & GraphQL (Apollo Client) Firebase (Auth, Firestore, Cloud Functions, Notifications) Supabase Node.js + Express PostgreSQL / MongoDB / NoSQL 𝗙𝗲𝗮𝘁𝘂𝗿𝗲𝘀 & 𝟯𝗿𝗱 𝗣𝗮𝗿𝘁𝘆 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 Google Maps SDK, Mapbox, OpenStreetMap Real-time chat, dashboards, analytics Multilingual Support (i18n) BLE (Bluetooth Low Energy) integration Stripe, RevenueCat, Superwall, Square Social Logins (Google, Apple, Facebook) OTA Updates with CodePush OpenAI API, Google ML Kit, Core ML 𝗠𝗼𝗻𝗶𝘁𝗼𝗿𝗶𝗻𝗴, 𝗔𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀 & 𝗗𝗲𝘃𝗢𝗽𝘀 Sentry, Crashlytics, MixPanel, Google Analytics Unit Testing & basic E2E Testing CI/CD pipelines for automated builds GitHub, GitLab, Bitbucket Daily builds & versioning (Expo EAS & Fastlane) 𝗖𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗶𝘀 𝗞𝗲𝘆 I keep clients involved and informed with regular updates, early test builds, and quick responses. Whether you're starting a new project or improving an existing app, I’m here to make sure it gets done right. Let’s chat! Send me a message and we can discuss how to bring your app idea to life.

  • Firebase
  • Mobile App Development
  • Supabase
  • React Native
  • iOS
  • React
  • iOS Development
  • Android App Development
  • MongoDB
  • TypeScript
  • Node.js
  • MERN Stack
  • Front-End Development
  • Full-Stack Development
  • AI Development

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