Onisim Stefan

Software Developer & Automation Engineer

I build dependable systems that turn noisy real-world input into decisions people can act on.

Open to UK roles and worldwide remote opportunities

01

About

I’m a London-based Software Developer who builds practical, user-focused solutions to real-world problems. I care about scoping a problem precisely, proving that what ships actually does what it claims, and building software people can rely on.

Recently I built parts of the OnisAI offer-scoring platform, including its OCR pipeline, contextual scoring engine, backend workflows and dashboard UI. That work led to a second system: a route corridor engine that scores a journey by what it crosses, not only where it ends.

My route into engineering came through product design and operational work. It shaped how I build: make uncertainty visible, design failure paths first, and prefer evidence gathered from real use over rules that merely sound convincing.

  • Decision systems
  • OCR & data extraction
  • Backend automation
  • Spatial data
  • Product engineering
  • Resilient workflows
  • Python
  • REST APIs
  • LLM integration
  • Docker
  • FastAPI
  • Cloudflare Workers
02

Experience

  1. May — Jul 2026

    Software Developer / Mobile Automation · Wally Driving London LTD

    Built a field-ready iPhone automation system for low-friction remote execution, including desktop-to-phone controls, self-updating GitHub delivery, diagnostics and recovery tooling.

    • Python
    • iOS Shortcuts
    • GPS
    • Automation
    • Git
  2. Oct 2025 — Jun 2026

    Software Developer & AI Automation · OnisAI

    Delivered OCR ingestion, parsing and validation, a contextual offer-scoring engine, backend reporting workflows and dashboard UI for a multi-tenant driver platform.

    • Node.js
    • Express
    • PostgreSQL
    • Cloud Vision
    • Stripe
    • Claude API
    • REST APIs
    • Webhooks
  3. May 2023 — Sep 2025

    Freelance Product & Web Designer · Client work

    Designed clear digital products and web experiences, translating operational needs into usable interfaces and maintainable design systems.

    • Product design
    • Web design
    • Prototyping
    • UX
    • Design systems
  4. May 2017 — Feb 2022

    Customer Service Representative · Tesco

    Customer-facing operational work in Greater London — experience that still informs how I design tools for people working under real constraints.

  5. 2021 — 2023

    BSc Business Administration & Management · Anglia Ruskin University

    Combined business operations, management and analytical work — experience that now informs how I judge software by its operational effect, not only its implementation.

03

Projects

01 / SPATIAL INTELLIGENCEShadow mode

Route corridor engine

A spatial-temporal graph built from driver-observed traffic data. It intersects a live route with exact, near and time-matched corridor evidence so the path matters as much as the destination.

  1. Observe traffic
  2. Match the route
  3. Score evidence
  • Python
  • GPS
  • Spatial indexing
  • Graph construction
  • MapKit contracts
02 / DECISION SYSTEMSShipped

OnisAI offer-scoring platform

A multi-tenant platform that turns a rideshare screenshot into an explainable accept or decline verdict using resilient OCR, validation fallbacks and context-aware scoring.

  1. Read screenshot
  2. Validate inputs
  3. Explain decision
  • Node.js
  • Express
  • PostgreSQL
  • OCR
  • Stripe
  • Claude API
  • REST APIs
03 / APPLIED COMPUTER VISIONShipped

GymLens

Photograph any gym machine and turn it into a workout. GymLens identifies the equipment, shows you what exercises it supports, and carries everything into a tracked session with progress you can see.

  1. Snap the machine
  2. Choose an exercise
  3. Start training
  • JavaScript
  • Cloudflare Workers
  • Workers AI
  • D1
  • FastAPI
  • PostgreSQL
  • Docker

Automation pipeline

Document structuring

Multi-stage PDF extraction into validated JSON, reducing manual review by roughly 80%.

  • Python
  • OCR
  • JSON Schema
  • Regex

Workflow automation

Email attachment classification

Classifies inbound files, extracts metadata, runs OCR and routes each document onward.

  • Python
  • OCR
  • Automation
  • Regex

What comes next

Building software for the real world.

I am currently open to software and automation roles across the UK, plus remote opportunities worldwide.