About
Abu Sadat Ansari. Full stack and AI engineer in Kolkata.
Story
I build software that ships. Client sites, products, and AI.
I am a full stack and AI engineer. I build web apps with Next.js, React, and Node, and I add AI where it earns its place: RAG assistants, voice agents, and media pipelines.
I started out running a creative agency and worked with more than 20 clients around the world. That is where I learned to scope work, talk with clients, and deliver on time. At SystemStar I built backend modules for HeatFleet, a heating oil marketplace, and several internal AI tools. I studied Computer Science at UEM Kolkata.
Experience
Where I have shipped. Roles, products, and what I built.
Software Engineer, Valence Tech
July 2026 – Present · India (Remote)
- Build AI agents and intelligent automation workflows
- Develop scalable backend architectures and microservices to power reliable, maintainable applications.
Full Stack Developer Intern, TheHouseKraft
June 2026 – June 2026 · Bengaluru, India (On-site)
- Identified an authentication vulnerability during the evaluation process, helping secure the internship opportunity.
- Worked on bug fixes and explored Java within the existing codebase.
Software Engineer Intern, SystemStar
Dec 2025 – Apr 2026 · Delaware, US (Remote)
- Backend modules and APIs in NestJS for HeatFleet, a heating oil marketplace.
- AI video pipeline: Redis queues, workers, FFmpeg, BunnyCDN.
- Multi-assistant voice agent on VAPI with context handoff.
- Wan 2.1 video model hosted on Runpod GPUs.
- Image-to-speech pipeline with Hugging Face TTS models.
Stack
Technologies I build with. Hover a logo for its name.
Exploring
- Distributed systems
- Advanced RAG
- AI-native system design
Education
- Degree
- Bachelor of technology in Computer Science
- University
- University of Engineering & Management, Kolkata
- Years
- 2022 – 2026
- GPA
- 7.9/10