Tristan Trommer
Software Engineer @ Zalando • Distributed Systems, System Architecture & High-Velocity Delivery •
I am a Software Engineer specializing in distributed systems, backend architecture, and cloud-native engineering. I thrive in high-velocity, high-scale environments where performance, strict availability, and delivery speed directly drive business value.
My engineering philosophy centers on extreme ownership, architectural pragmatism, and execution speed. Whether refactoring legacy microservices, designing real-time event streaming pipelines, planning zero-downtime framework migrations, or building full-stack serverless applications from scratch, I focus on shipping clean, resilient, and highly maintainable code.
I am particularly interested in system design trade-offs, developer experience, and modernizing complex infrastructures without interrupting live operations.
Blog
There are no posts available.
Experience
Zalando
5 yrs · Berlin, Berlin, Germany
Software Engineer
Full-time · Hybrid
Jun 2025 – Present · 1 yrs 2 mos
- Authored comprehensive technical design documents and an infrastructure roadmap to migrate an 88,000-line core Scala/Cats Effect microservice to Kotlin and Spring Boot 4.x on JDK 25. Designed a zero-downtime Strangler Fig strategy leveraging traffic shadowing, feature-flagging, and automated "Double EXCEPT" SQL reconciliation for real-time data parity across 6 planned rollout waves.
Junior Software Engineer
Full-time · Hybrid
Jul 2024 – May 2025 · 11 mos
- Transitioned from a Java background to production-grade Scala in under 3 months, becoming a primary maintainer for high-throughput partner-facing APIs.
Junior Software Engineer
Apprenticeship · Hybrid
Aug 2021 – Jun 2024 · 2 yrs 11 mos
- Developed and maintained microservices, REST APIs, and internal tools in Java and Kotlin, adhering to strict code quality, testing, and version control standards.
EventAssets
10 mos · Berlin, Berlin, Germany
Founder
Self-employed · Remote
Oct 2025 – Present · 10 mos
- Built and bootstrapped a high-performance event management/media platform from end-to-end — scaling to 50+ active events with zero infrastructure downtime while owning product design, architecture, localization, and payment flows.
Vessel X
3 mos · İzmir, İzmir, Türkiye
Intern
Internship · Hybrid
Jun 2023 – Aug 2023 · 3 mos
- Engineered a serverless backend on GCP (Python, PostgreSQL) to process real-time telemetry and device communications for an autonomous marine vessel.
Skills
Projects
Tristan Trommer
Jan 2024 - Jan 2024 · 1 mos
A high-performance personal portfolio and engineering blog deployed globally at the edge on Cloudflare Workers. Engineered with TypeScript, Next.js, Framer Motion, and Tailwind CSS to achieve zero cold starts, fluid UI interactions, and sub-100ms page load times worldwide.
EventAssets
Jun 2025 - Present · 1 yrs 2 mos
A high-performance, fullstack serverless event media platform scaled to 50+ live events across 5 languages. Built using Hono, Next.js, Stripe, and Cloudflare Workers, the platform features a custom Cloudflare R2 media engine with dynamic edge image optimization and manual D1 database sharding (10 GB to 500 GB), delivering sub-50ms global API latency.
Contact
Use the contact form or send me an email.