Tsion BirhanuFull Stack Developer & AI Engineer

I build the whole thing across the front end, back end, and AI in between.

I build production web apps end to end: Next.js interfaces, FastAPI services, PostgreSQL data layers, and RAG systems that answer from real business data.

See the workAsk my AI twin
request → responsetracing

  1. 01 interface

    Next.js · React · TypeScript

  2. 02 api

    FastAPI · Node.js · Express

  3. 03 data

    PostgreSQL · MongoDB · Supabase

  4. 04 retrieval

    pgvector · LangGraph · embeddings

  5. 05 model

    Gemini · streamed answers

$ one developer, all five layers

8+
Products shipped to production
2×
First place, hackathons
UTC+3
Remote · async first

/about

Who you’re hiring

tsion/

tsion/about.md

I build production web apps for real users, real data, and real uptime expectations. My day to day work is Next.js and React on the front end, with FastAPI, Node.js, or Express behind it.

I also build AI powered features when they make the product more useful. Most of that work is retrieval, semantic search, and helping a model answer from real project data instead of guessing.

I like owning a feature from the first "what are we solving" conversation through design, API, UI, and deployment. I work remotely from UTC+3 and I am comfortable collaborating with teams across time zones.

/work

Selected case studies

04 shipped products

/experience

Engineering timeline

A timeline of the roles where I shipped features, improved backend systems, and helped move products into production.

  1. a3f9c21feat(platform): full stack delivery, requirements to production

    Full Stack Developer

    Current

    Doxa Innovations PLC, 02/2026 to Present, Bishoftu, Oromia

    • Own full stack delivery across multiple company products, taking each from requirements and data modelling through API, interface, and production deployment
    • Build and maintain production web applications with Next.js, Vue.js, FastAPI, and PostgreSQL, including role based access control and secure customer facing portals
    • Ship containerized releases with Docker Compose, and design APIs and schemas intended to stay maintainable as each product grows
    • Next.js
    • Vue.js
    • TypeScript
    • FastAPI
    • PostgreSQL
    • Docker Compose

  2. 7d1e4b8feat(freelance): AI powered SaaS features

    Freelance Full Stack Developer

    Current

    Private Clients, 12/2024 to Present, Remote

    • Build SaaS applications with AI powered features using Next.js, React, Node.js/Express, and FastAPI
    • Ship RAG based search and LLM integrations with LangChain
    • Manage full project lifecycles for international clients across multiple time zones
    • Next.js
    • React
    • Node.js
    • Express.js
    • FastAPI
    • LangChain

  3. c05a9f3feat(backend): backend services and data workflows

    Backend Developer

    Uponli Team, 09/2025 to 02/2026, Remote

    • Delivered backend services for different internal projects using Python, FastAPI, and SQL
    • Built data processing workflows for structured records, validation, and reliable API responses
    • Optimized database queries and backend logic to improve performance and maintainability
    • Python
    • FastAPI
    • SQL
    • Data Workflows

  4. initial commit, still building

/skills

Technical skills

A focused stack for building reliable web products, AI features, and the systems behind them.

Frontend

  • Next.js
  • React
  • TypeScript
  • Tailwind CSS

Backend

  • FastAPI
  • Node.js
  • Express.js
  • Python

Data

  • PostgreSQL
  • Supabase
  • MongoDB
  • Redis

AI/LLM

  • RAG
  • LangChain
  • LangGraph
  • Semantic Search
  • Gemini

Deployment

  • Docker
  • Vercel
  • Render
  • Netlify

Workflow

  • Git
  • Code Review
  • Testing
  • Documentation
  • Async Collaboration

Currently strongest in

/contact

Let’s talk

Have a project, role, or question? Send a note and I’ll reply fast.

Adama, Ethiopia
Open to freelance, contract, and full-time