Hire the Best React Native Developers
in Kenya

I’m Paul Upendo, a Senior Front-End Engineer specializing in React, Vue, JavaScript, Next.js, Node.js, and Firebase. I’ve worked both as a top independent freelancer and as an engineer on Upwork’s internal Monetization Engineering team, where I improved platform performance, rebuilt critical features, and helped drive revenue at enterprise scale. I bring a product-focused, performance-driven approach to front-end engineering — delivering fast, reliable, and scalable interfaces that directly support business goals. What I Deliver: * High-performance front-end development with Core Web Vitals optimization * React & Vue migrations from legacy stacks (AngularJS, PHP, jQuery) * Modern, scalable component systems with Tailwind, Radix UI, and reusable patterns * Next.js applications with SSR/ISR, serverless APIs, and Firebase integrations * Dashboards, analytics interfaces, and data visualizations * Clean architecture, clear communication, and dependable delivery Why Clients Trust Me: ✓ Senior-level engineering judgment ✓ Strong UX and product understanding ✓ Proven performance improvements (27% gains, 95%+ web vital performance scores) ✓ Experience building for millions of real users ✓ Clear timelines, proactive communication, and reliable execution If you need a front-end engineer who brings speed, clarity, and senior-level technical expertise, I’d be glad to help you build something exceptional.

I am a Senior Full-Stack Developer and AI/ML Engineer with a proven record of delivering high-performance, scalable, and secure digital products. Over the past 5+ years, I’ve helped global clients transform complex ideas into production-ready solutions that drive real business impact. I excel in environments that demand technical depth, strategic thinking, and end-to-end ownership. My experience spans real estate, fintech, healthcare, and education—where I’ve led the design and development of web platforms, mobile applications, and intelligent systems. I specialize in building solutions that are robust, maintainable, and optimized for long-term growth. What I bring to your project: ✅ Senior-level expertise in full-stack web & mobile development (React, Next.js, React Native, Django, Flask) ✅ Strong capability in AI & Machine Learning, including integrating intelligent, data-driven features ✅ Deep understanding of backend architecture and cloud infrastructure ✅ Clean, scalable, and well-tested code following industry best practices ✅ Leadership, mentorship, and the ability to drive technical direction in fast-paced environments ✅ Commitment to security, high performance, and engineering excellence Let’s build something exceptional together.

I help startups, SaaS companies, and growing businesses build scalable web applications, AI-powered software, cloud-native platforms, and enterprise solutions using React, Next.js, Node.js, TypeScript, Python, Go, AWS, Docker, and Kubernetes. Whether you need an MVP, a production-ready SaaS platform, custom APIs, AI automation, cloud infrastructure, or ongoing product development, I can take ownership of the entire software development lifecycle from architecture and backend development to frontend implementation, deployment, and long-term scaling. What I Can Build 🚀 SaaS Applications Multi-tenant SaaS platforms Subscription and billing systems Admin dashboards Customer portals Role-based access control (RBAC) User authentication & authorization SaaS architecture and scaling 💻 Full Stack Web Development React.js & Next.js applications TypeScript & JavaScript development Node.js, Express.js & NestJS backends Python (FastAPI & Django) Go (Golang) backend services REST APIs & GraphQL APIs Microservices architecture Real-time applications with WebSockets Responsive and high-performance web applications 🤖 AI & Automation OpenAI & GPT integrations AI chatbots AI agents Retrieval-Augmented Generation (RAG) LangChain applications Vector databases AI workflow automation Document processing Intelligent search systems ☁️ AWS Cloud & DevOps AWS architecture and deployment Docker containerization Kubernetes orchestration CI/CD pipelines GitHub Actions Infrastructure as Code Nginx configuration Monitoring, logging & performance optimization Production deployments Cloud cost optimization 🔗 API Development & Integrations Stripe & PayPal integrations Payment gateways Third-party API integrations OAuth & JWT authentication Firebase & Supabase Data synchronization Webhooks Enterprise API development Technical Skills Frontend: React.js, Next.js, TypeScript, JavaScript (ES6+), HTML5, CSS3, Tailwind CSS, Redux Backend: Node.js, NestJS, Express.js, Python, FastAPI, Django, Go (Golang) Databases: PostgreSQL, MySQL, MongoDB, Redis Cloud & DevOps: AWS (EC2, S3, RDS, Lambda, CloudFront, IAM), Docker, Kubernetes, GitHub Actions, CI/CD, Nginx, Linux AI & Machine Learning: OpenAI API, LangChain, RAG, Vector Databases, AI Agents, Prompt Engineering Why Clients Hire Me ✔ Full-stack expertise—from frontend to cloud infrastructure ✔ Clean, scalable, and maintainable code ✔ Fast MVP development without compromising quality ✔ Strong communication and transparent project updates ✔ Production-ready deployments with DevOps best practices ✔ Long-term maintenance and feature development ✔ Focus on performance, security, and scalability If you're looking for a Full Stack Developer, React Developer, Next.js Developer, Node.js Developer, TypeScript Developer, Python Developer, Go Developer, AWS Developer, DevOps Engineer, or AI Developer who can deliver reliable, scalable software from concept to production, I'd be happy to discuss your project. Tags Full-Stack Developer (React / Node.js) | React / Next.js / Nest.js Developer | Node.js Backend Developer | MERN Stack Developer | Full Stack Laravel Developer | Supabase Full Stack Developer | Full Stack JavaScript Developer | Full Stack SPA Developer | Full Stack Real-Time Web Applications Developer | Full Stack Dashboard Development Expert | Full Stack Custom SaaS & MVP Developer | Full Stack DevOps Engineer | Full Stack Database Management Expert | Responsive Web Design Specialist | Enterprise SaaS, Admin Dashboards, Role-Based Analytics, Reporting, Internal Workflow Automation | Senior Software Developer | SaaS Developer | Nest.js Framework Expert | Node.js Web Development | React Lifecycle Expert | Full Stack Development Specialist,Nuxt.js,Vue.js,Nuxt.js,Vue.js,Nuxt.js,Vue.js,Nuxt.js,Vue.js React.js, React Native, Next.js, Node.js, Nest.js, JavaScript, TypeScript, Python, Django, Laravel, Supabase, PostgreSQL, MySQL, Firebase, Expo, Flutter, iOS, Android, RESTful API, API Integration, Payment Gateway Integration (Stripe), User Authentication, Cross-Platform App Development, Progressive Web Apps (PWA), AI Development, AI Agent Development, Website Redesign, Mobile App Development, Custom SaaS Development, Full Stack DevOps,Nuxt.js,Vue.js #WebDevelopment #FullStackDevelopment #WebApplication #JavaScript #NodeJS #ReactJS #Python #Django #APIIntegration #RESTfulAPI #AIDevelopment #PostgreSQL #SaaSDevelopment #UserAuthentication #DatabaseArchitecture #PaymentGatewayIntegration #MobileAppDevelopment #iOS #Android #Flutter #CrossPlatform #ReactNative #Firebase #Expo #TypeScript #ProgressiveWebApp #CustomSaaS #DevOps

I’m a Senior Software Engineer with 6+ years of experience building high-quality web and mobile applications using React.js and React Native. I specialize in developing cross-platform solutions that are fast, reliable, and deliver a seamless user experience across devices. Currently, I work as a Senior Mobile Engineer at Gessic Softwares, where I design and build scalable mobile applications while applying modern development practices and performance optimization techniques. My approach to development is client-focused: I work closely with stakeholders to understand their business needs and translate them into practical, well-engineered solutions. If you're looking for a developer who can deliver clean, maintainable code and high-performing applications, I’d be glad to collaborate and help bring your product to life.

I am a full-stack developer with over four years of experience building high-quality, industry-standard web components and apps in the corporate world. My core skills are JavaScript/Typescript, ReactJs, React Native, NodeJs, Laravel/PHP, and HTML/CSS. I have a bachelors' in Applied Computer Technology from the United States International University - Africa in Applied Computer Technology.

Full-stack product engineer specializing in mobile apps and scalable backend systems. I build mobile apps for iOS and Android, from startup MVPs to production-grade apps that need a serious refactor. Whether you need a cross-platform app built with React Native, a clean architecture overhaul, or a web dashboard to complement your mobile product, I handle the full scope: UI, logic, APIs, and deployment. My process starts with understanding your users and business goals before writing a single line of code. I follow scalable architecture patterns, write clean, maintainable code, and communicate consistently throughout, so you always know where the project stands. Every delivery goes through thorough testing across devices before it reaches your users. If you're ready to build something solid or fix what's broken, send me a message with a brief overview of your project. I typically respond within a few hours and offer a free discovery call to make sure we're the right fit before you commit.