Sebastian Evison-Theodossiades - Full-Stack Developer

Full-stack developer focused on web applications and infrastructure. Starting work at NatWest Group in September 2026. Graduated from the University of Leicester with a First-class honours degree (79.48% overall) in Computer Science. Previously worked as a SWE at the Office for National Statistics.

Work Experience

Engineering Graduate Trainee - London

NatWest Group

Starting Sept. 2026

Incoming graduate Software Engineer at NatWest Group.

Software Engineer

Office for National Statistics (ONS)

Sept. 2024 - May 2026

Developed scalable React/Python apps on AWS (ECS Fargate, S3, Cognito) with Terraform; owned CI/CD and automated tests. Took PoC from concept to production plus key supporting services. Accepted part-time extension to continue during dissertation collaboration.

Founder

Lattara.org

June 2025 - Nov. 2025

Built custom Selenium scraping service delivering structured data to clients via scheduled jobs. Maintained monthly subscription model, with payment via cryptocurrency on a self-made dashboard.

Projects

Survey Kit

Open-source React survey framework: mobile-first flow, WCAG 2.2 AA, JSON config, TypeScript, form/chat rendering modes, validation, progress and localStorage persistence. Created for my university final year project, received 80.58% overall.

ONS Tech Stack Visualiser

Led MVP development to map ONS repositories, project and dependencies. ECS-hosted app (React/Node.js) deployed with Terraform IaC; used by 100+ staff for project discovery and technology assessment.

Lattara.org

High-scale Twitter & YouTube scraping platform. Requires signup, paid via crypto. Outputs clean JSON for developers, analysts and prediction markets.

ScanSave.In

1st place winner of the IBM x LeicesterCS Hackathon 2025. AI-powered app to track diet and spending by scanning barcodes. Next.js, Supabase, GeminiAI.

LinkedIn Games Solver

An automated system that solves LinkedIn's daily games every morning at 8am. The frontend is built with Vite and deployed on Vercel, while the backend uses Python with Flask RESTX. A Selenium-wire bot, running on a Hetzner VPS, scrapes the answers and updates the solutions each day.

Education

University of Leicester

BSc Computer Science

Sept. 2022 - June 2026

Graduated with a First-class honours degree (79.48% overall). Completed a one-year placement at the ONS in Year 3; part-time employment at the ONS continued in Year 4 whilst collaborating on my final year project (achieved 80.58% overall).