Leading Web Experimentation initiatives and engineering excellence.

• —Led architecture and backend development of a real-time Contextual Bandit (CMAB) experimentation system delivering ML-driven personalization via low-latency APIs, reducing decision latency from ~400ms to under 200ms through hybrid Redis + session caching.
• —Built an AI-powered architecture intelligence system (Claude Code + GitHub Copilot) spanning 71 microservice repositories, with 15 custom investigation skills and 3 specialized agent personas.
• —Led migration of Edit Proxy from Python 2 to 3 on Google App Engine, reducing security vulnerabilities by 99% in 3 months.
• —Resolved a critical AWS DynamoDB auto-scaling issue for a high-load distributed system averaging 450 req/s with spikes to 45K during peak hours, achieving 99.9% uptime.
• —Mentored junior engineers and performed code reviews, enforcing best practices and guiding system design decisions.

Cloud-native SaaS product development in collaboration with Kunnusta.

• —Architected distributed, event-driven backend systems for a multi-tenant newsroom SaaS platform serving European customers.
• —Led migration of news microservices to serverless-first architecture using AWS Step Functions, Lambda, and SQS — achieving 99% uptime and 50%+ performance improvement.
• —Initiated migration of 2 AWS Fargate-based microservices to Lambda, increasing cold start speed by 50%+ and reducing monthly costs by ~40%.
• —Designed backend REST APIs for publishing to Instagram and TikTok via OAuth 2.0.