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$110/hr
100%
Job Success
$500K+ earned
Offers consultations
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I help companies build software that is difficult to build.
With 20+ years of hands-on engineering experience—including CTO and Head of Engineering roles—I design, build, modernize, and scale complex software products. I've worked with startups, fast-growing SaaS companies, trading firms, and enterprise organizations, leading projects from idea to production.
My experience includes AI-powered applications, trading and fintech platforms, SaaS products, cloud-native systems, backend architecture, automation, and engineering leadership. I still write production code every day and enjoy solving challenging technical problems.
Whether you need an MVP, a production-ready platform, AI integration, system modernization, performance optimization, or technical leadership, I can take ownership of the entire engineering process—from architecture and implementation to delivery.
Core expertise:
• AI Agents, LLMs & Automation
• Trading & FinTech Systems (FIX, Market Data, Risk)
• SaaS Platforms & Cloud Architecture
• Java, Python, Node.js, TypeScript
• AWS, Docker, Kubernetes, PostgreSQL
• CTO / Fractional CTO / Engineering Leadership
I prefer long-term partnerships where I can make a measurable technical and business impact.
Nikita B.
has worked
.
$30/hr
91%
Job Success
$20K+ earned
Offers consultations
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I build production-ready web apps and AI features that ship fast and don’t break in production.
RAG chatbots, AI agents, LLM integrations, and full-stack delivery (Spring Boot + React/Next.js + Node/Python).
Top Rated | 100% Job Success
Hi, I’m Muneeb, a Full-Stack Engineer specializing in AI integrations (LLMs, RAG, Agents) and scalable web apps.
I help startups and product teams ship clean, fast, production-ready features from MVP to mature systems without hand-holding.
What I build (client outcomes)
LLM features inside your product: summarize, extract, classify, chat, search, Q&A
RAG chatbots (secure, multi-tenant, citations, evals, monitoring)
AI agents & tool-using workflows (guardrails, retries, structured outputs)
Full-stack SaaS features (auth, billing, dashboards, APIs, admin panels)
Automation + integrations (OAuth, 3rd-party APIs, Twilio, webhooks, event-driven flows)
Performance & reliability fixes (slow endpoints, query tuning, memory leaks, flaky UI)
My core stack
Frontend: React, Next.js, Angular, TypeScript, Tailwind, shadcn/ui
Backend: Java (Spring Boot), Node.js (NestJS), Python, REST APIs
AI/LLM: RAG, AI Agents, prompt engineering, LangChain/LangSmith, Claude/Gemini (as needed)
Data: PostgreSQL, MySQL, MongoDB
DevOps: Docker, Git, CI/CD (GitHub Actions/Jenkins)
How I work
* Clarify scope + success criteria (fast)
* Ship an MVP version early (so you can test)
* Iterate with tight feedback loops
* Handover with clean code + docs + deployment notes
If you want someone who can own a feature end-to-end and deliver reliably, message me with:
your goal, your current stack, and what “done” looks like.
Muneeb K.
has worked
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$63/hr
100%
Job Success
$100K+ earned
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End of list.
• Software Engineer with over 12 years of experience in designing, developing, and supporting enterprise-grade software systems.
• Proficient in Java, Spring / Spring Boot / Spring AI / Quarkus / LangChain4J
• Experienced with Groovy / Grails / Micronaut and C# / .NET
• Hands-on experience building AI-powered applications and intelligent agents using Large Language Models (LLMs) integrated via LangChain4J and Spring AI
• Build custom AI developer tooling — skills, plugins, and coding knowledge-base projects — that codify engineering best practices into reusable workflows
• Practical experience using AI coding agents and assistants — Claude Code, Codex, and Grok — to accelerate development, refactoring, and code review workflows
• Proven track record in enterprise application development and high-availability system support
• Core expertise across Web, Desktop, and Cloud-based solutions
• Strong ability to collaborate effectively in multicultural and distributed teams
• Extensive hands-on experience in software research, design, development, testing, and deployment
Hayk H.
has worked
.
$29/hr
100%
Job Success
$90K+ earned
Available now
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I am senior software engineer having more than 8 years of experience designing & developing products based on below technologies-
Backend:
✔ Spring Boot / Java EE / kotlin / Java
✔ Microservices / Kafka / RabbitMQ
✔ REST API / SOAP
✔ Spring security / OAuth
✔ Twilio / social / azure ad
✔ JPA / Hibernate
✔ Tomcat / glassfish
✔ Junit / mockito
✔ Azure / AWS services
Database:
✔ MySql / mongodb / LDAP / Postgresql
Frontend:
✔ Ionic with angular
✔ Angular / React / TypeScript
✔ JSP / JSF / Thymleaf
✔ HTML5 / CSS
BI tools:
✔ jaspersoft studio / jasper server / ireport
Others:
GIT / tortoise SVN / IntelliJ / netbeans / eclipse / vs code / JIRA / STS
Feel free to contact!
Prabudh K.
has worked
.
$60/hr
100%
Job Success
$40K+ earned
Offers consultations
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I help product teams integrate AI into their existing Java/Spring Boot systems — turning slow, manual workflows into intelligent, conversational experiences.
Recently I built an AI-powered campaign creation system for a leading Indian OTT advertising platform (100M+ users) — replacing complex form-based operations with a conversational AI interface using Spring AI and Claude. The result: faster campaign setup with significantly less manual effort.
With 14+ years of delivery across OTT, AdTech, retail, healthcare and fintech — I understand that AI only adds value when it fits your existing architecture and solves a real business problem. I don't prototype. I build production-ready systems.
What I deliver:
- AI workflow automation inside existing Java/Spring Boot systems
- Conversational interfaces replacing form-heavy operations
- Microservices architecture and REST/GraphQL API design
- Full stack delivery — Spring Boot backend through React frontend
Tech I work with:
Spring Boot · Spring AI · Claude API · MCP · React · Flutter · AWS · Docker · PostgreSQL · MongoDB
My background includes:
- Ex-Technical Architect and Java Team Lead
- Delivered for Fortune 500s and high-scale startups
- $40K+ earned on Upwork across 14 contracts · 3,100+ hours
Best fit for:
Product companies in OTT, AdTech or fintech with an existing Java backend looking to add AI capabilities — without rebuilding from scratch. I've also delivered across retail and healthcare, so if your problem fits my skills, let's talk.
If that sounds like your situation — message me.
VIJAYAKUMAR G.
has worked
.
$20/hr
100%
Job Success
$900+ earned
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End of list.
I am a software engineer since 2020 and a full-stack developer since 2018.
I am here to help you make your idea become reality, i have worked with the following technologies:
✅ Flutter
✅ Spring boot
✅ Angular
✅ Django
✅ NodeJS
✅ Javascript/Typescript
✅ Java
✅ Kotlin
✅ Python
✅ MySQL
✅ PostgreSQL
✅ MongoDB
✅ Git (Github, Gitlab, Bitbuket)
Alioune K.
has worked
.
Nigeria
$32/hr
$40K+ earned
Start of list.
End of list.
I'm a Back End Developer with extensive experience in building high-quality sites. I have vast experience building Web services and APIs. I am specialised in backend development using Express in Nodejs or Spring Boot in Java. I love solving problems and I am committed to serve my customers well.
Patrick U.
has worked
.
$20/hr
100%
Job Success
$5K+ earned
Offers consultations
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End of list.
🚀 Build & Launch Your MVP in 2–3 Weeks — Guaranteed
Are you a founder or startup looking to get your idea off the ground fast? I help entrepreneurs like you go from concept to a production-ready MVP in weeks — not months — using powerful AI-enhanced workflows.
💡 What I Deliver:
• Fully functional MVPs in 2–3 weeks
• Clean, scalable full-stack architecture
• AI-powered development for faster results
• Clear, consistent communication and daily updates
🔥 Recent Wins:
• AI-Powered Job Platform — Launched in 2 weeks → 1000+ active users
• Crypto Gaming Platform — Built in 2.5 weeks with real-time features
• Copyright Management System — Full-stack build handling $100K+ in transactions
🧰 My Tech Stack Includes:
Frontend: React.js, Next.js, Remix, Cursor AI, Bolt.new, Lovable
Backend: Node.js, Express, Nest.js, Prisma, GraphQL, supabase
Databases: PostgreSQL, MongoDB
Other: AWS, Vercel, Docker, CI/CD, WebSockets
💎 Why Clients Choose Me:
• Speed without sacrificing quality
• Production-ready code and clean documentation
• Clear communication across EST/PST/GMT/MST time zones
• Post-launch support to help you scale confidently
Whether you’re validating an idea or racing to meet investor deadlines, I’m here to help you deliver. Let’s bring your vision to life — fast and right.
👉 Send me a message and let’s build your MVP!
$87/hr
$1K+ earned
Start of list.
End of list.
I'm a full stack AI Developer who builds smart web apps using AI, machine learning, and deep learning. I mix solid front-end and back-end skills with AI know-how to create apps that are scalable, data-driven, and easy to use.
* Frontend Development 12 years
* Backend Development 9 years
* Full Stack & AI Development 12 years
* WordPress, Shopify, CMS 10 years
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I bring creative thinking and strong problem-solving skills to turn your ideas into high-quality, polished products. I’m great at managing time, delivering reliable results, and understanding exactly what clients need even when things aren’t fully defined. With 15 years of full-stack development experience, I can handle projects of any size, from startups to large-scale enterprise solutions.
If you want a high quality project based on your excellent idea, let's start.
$30/hr
100%
Job Success
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End of list.
Do you need a mobile application that is secure, stable, and built to last?
With 15+ years of software development experience, including a role as Tech Lead in the banking sector (Diners Club), I specialize in creating high-performance applications where data security and code quality are non-negotiable.
I combine deep Backend knowledge (Java/Spring Boot, Microservices) with modern Mobile development (React Native) to build complete, robust ecosystems, not just simple interfaces.
My Core Expertise:
Mobile Development: React Native (Android & iOS) with offline-first architecture.
Strong Backend Roots: Expert in Java and Legacy Integrations (AS400, SQL).
Banking-Grade Security: I build apps with the rigorous security standards required by financial institutions.
Scalability: Experience with Docker, Kubernetes, and Cloud infrastructure.
Whether you need to modernize a legacy system or build a secure Fintech app from scratch, I can guide you to the best technical solution.
Let's discuss your project.