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I'm Ahmet Saim Ustel, a Full Stack Developer with 4+ years of professional experience building scalable SaaS platforms using the MERN stack. I design end-to-end web applications from database design to responsive UI, deploying production-ready software and collaborating with product teams to ship value on time. I'm actively exploring AI-driven development with Claude Code for test generation, code refactoring, and workflow automation, and I have hands-on experience integrating OpenAI APIs and AI agents for tasks like automated screening and workflow optimization. I enjoy turning complex problems into robust, maintainable systems and mentoring teams to ship high-quality software.…I'm Ahmet Saim Ustel, a Full Stack Developer with 4+ years of professional experience building scalable SaaS platforms using the MERN stack. I design end-to-end web applications from database design to responsive UI, deploying production-ready software and collaborating with product teams to ship value on time. I'm actively exploring AI-driven development with Claude Code for test generation, code refactoring, and workflow automation, and I have hands-on experience integrating OpenAI APIs and AI agents for tasks like automated screening and workflow optimization. I enjoy turning complex problems into robust, maintainable systems and mentoring teams to ship high-quality software.

Ahmet Saim Ustel

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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I'm Ahmet Saim Ustel, a Full Stack Developer with 4+ years of professional experience building scalable SaaS platforms using the MERN stack. I design end-to-end web applications from database design to responsive UI, deploying production-ready software and collaborating with product teams to ship value on time. I'm actively exploring AI-driven development with Claude Code for test generation, code refactoring, and workflow automation, and I have hands-on experience integrating OpenAI APIs and AI agents for tasks like automated screening and workflow optimization. I enjoy turning complex problems into robust, maintainable systems and mentoring teams to ship high-quality software.…I'm Ahmet Saim Ustel, a Full Stack Developer with 4+ years of professional experience building scalable SaaS platforms using the MERN stack. I design end-to-end web applications from database design to responsive UI, deploying production-ready software and collaborating with product teams to ship value on time. I'm actively exploring AI-driven development with Claude Code for test generation, code refactoring, and workflow automation, and I have hands-on experience integrating OpenAI APIs and AI agents for tasks like automated screening and workflow optimization. I enjoy turning complex problems into robust, maintainable systems and mentoring teams to ship high-quality software.

Available to hire

I’m Ahmet Saim Ustel, a Full Stack Developer with 4+ years of professional experience building scalable SaaS platforms using the MERN stack. I design end-to-end web applications from database design to responsive UI, deploying production-ready software and collaborating with product teams to ship value on time.

I’m actively exploring AI-driven development with Claude Code for test generation, code refactoring, and workflow automation, and I have hands-on experience integrating OpenAI APIs and AI agents for tasks like automated screening and workflow optimization. I enjoy turning complex problems into robust, maintainable systems and mentoring teams to ship high-quality software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Turkish

Fluent

English

Advanced

Work Experience

Co-founder & Technical Lead at Exponential

February 1, 2025 - Present

Designed, built, and deployed 9 SaaS platforms end-to-end using the MERN stack. Architected scalable RESTful APIs with Express.js, MongoDB, and Redis caching layer. Built real-time features with Socket.IO for live notifications. Implemented JWT authentication, RBAC, Helm, CORS, Rate Limiting, and 2FA. Docker, Docker Compose, PM2, Nginx; wrote integration tests with Jest and Vitest using MongoDB memory server. Led AI-driven development using Claude Code for test writing, refactoring, and boilerplate automation. Platforms included EU Digital Product Passport compliance, Health Care CRM, Carbon Credit Marketplace, and Water Management SaaS.

Technical Lead at Medusa Global Acceleration & Consultancy

January 1, 2025 - June 1, 2025

Led technical operations for 60+ websites across diverse hosting environments and tech stacks. Built a Factory Management System (Next.js + Node.js + MongoDB + Redis) used by 15 staff, boosting workflow speed 3x. Managed server migrations, VPS/dockerized infrastructure, and performance optimization.

Full Stack Web Developer at Nova Forge

July 1, 2025 - August 1, 2025

Developed an AI-powered recruitment platform with autonomous interview agents. Built React + TypeScript frontend with Vite, TanStack Query, and Supabase (Postgres). Implemented AI voice interview service using Python, FastAPI, OpenAI API, and Twilio. Engineered end-to-end AI pipeline: candidate screening, automated phone interview, scoring and ranking. Deployed AI microservice on Digital Ocean with Nginx and system design.

Full Stack Web Developer at Sar Sistem Software Company

August 2, 2022 - January 1, 2025

Developed 3 high-traffic production applications using the MERN stack; implemented real-time data processing, responsive UI, and backend services. Worked on RESTful APIs, MongoDB, Redis, and modern frontend tech. Led code reviews and CI/CD integration.

Frontend Developer at Freelance

August 1, 2021 - August 1, 2022

Developed responsive websites using WordPress and React.js for diverse clients, focusing on UI/UX and performance optimization.