· Teya: A fintech company offering SMBs payment solutions.

· Assisted migration of the payment gateway from Python to Java, scaling throughput to 300 req/s and millions of daily transactions, cutting cloud costs by 99%, and achieving 700ms p50 latency.

· Migrated HSM from on-prem to the cloud, eliminating transaction loss from hardware unavailability.

· Integrated a new acquiring host, moving from on-prem to the cloud and reaching 99.96% reliability.

· Led AI-assisted coding adoption (Cursor 2024, Claude Code 2025) and in 2026 developed an Agentic Coding training course for 50+ engineers: hack.l3.ai

· Contributed to a custom event-driven alerting system that replaces parts of PagerDuty, simulating trades, measuring end-to-end latency, and auto-paging engineers on anomaly detection

· AIMMS: A specialized programming language for mathematical optimization applications.

· Led performance roadmap, reducing p50 page load time from 20s to under 4s, boosting user experience.

· Migrated the company to GitLab, replacing a 2-week manual testing cycle with an automated CI/CD pipeline across 3 teams and cutting release time to minutes.

· Modernised 50% of the codebase from legacy ES5 to ES2015+, eliminating common JavaScript bugs.

· Improved map response times by 50%, speeding up hotel rendering and enhancing conversion.

· Increased map conversion rate by 2% through A/B testing and machine learning experiments.

· Enabled Mac users to book Booking.com hotels directly from Apple Maps for the first time.

· Supported 600+ engineers on production incidents and rollouts as part of the incident response team.

· One.com: A leading web hosting company serving millions of individuals and SMBs across the Nordic region.

· Led the redesign of the photo application (v2 and v3), migrating from a legacy PHP/XML gallery to a Node.js/PostgreSQL SPA serving 200K+ domains.

· Contributed to Apache auth module (C), video encoding pipeline (Perl), and video player (ActionScript).