$ whoami

Hi, I'm Justas, software engineer

Backend-focused full-stack developer with a decade of product experience in fintech product management at Revolut, UBS and others.

Profile picture

From roadmaps
to repositories

I spent over a decade managing products in fintech: building financial crime detection systems at Revolut and UBS, and building payment infrastructure at early-stage startups, and others.

The more I worked with the engineers, the more I wanted pulled to be on that side of the table. I was compelled by the hands-on ownership of and working with system designs, and logic: less coordinating and more building. I finally made the leap and became a full-stack software engineer. See my work

I combine genuine customer empathy from a decade of product work, with the technical depth to act on it directly. I'm looking for Backend or Full-Stack Engineering roles at fast-moving teams where both matter.

experience 10+ years in fintech PM
built & deployed 2 production applications
stack
Python FastAPI TypeScript React PostgreSQL Docker SQL REST APIs Git & GitHub Actions CI/CD Pytest OAuth 2.0 / JWT

Things I've built

Production apps demonstrating backend design, API architecture, and full-stack integration.

live full-stack

SpendPulse

A personal finance app that imports bank statements, auto-categorizes transactions via a custom rules engine, and provides spending analytics with filtering and drill-down. Fully containerized and deployed to production

Python FastAPI PostgreSQL React TypeScript Vite Supabase Docker CI/CD JWT Auth Async data pipeline
  1. Click "Live Demo" to open the app
  2. Create a free account or click on Try Demo
  3. Use the existing data to analyze transactions and add spending categories
  4. Try importing your bank statement or use one of the samples provided
live full-stack

Weight Tracker

Health tracking app with authentication, daily weight logging, trend visualization, and goal-setting. Built as proof of end-to-end full-stack capability.

Python FastAPI PostgreSQL React TypeScript Vite Supabase CI/CD JWT Auth Data Processing Google OAuth 2.0 Integration
  1. Click "Live Demo" to open the app
  2. Create a free account or use demo credentials:
    • Email: wtdemo@justas.tech
    • Password: demo1
  3. Log a weight entry and see the trend chart update
  4. Set a goal weight to see progress tracking

Let's talk

I'm looking for backend or full-stack engineering roles, particularly in fast-moving companies that value product-minded engineers.

I am a EU resident and hold a permanent UK residency status. Looking for remote or EU / UK - based positions. Reach out about roles, collaborations, or just to connect.