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AR
Applied ML engineer with seven years shipping production LLM systems — retrieval, evaluation, and reliable tool-use. Care most about small teams where research and product live in the same repo. Left last role after the org went from three engineers to sixty and the shipping loop broke.
What I want in a company
The values that matter most to me — matched against the same taxonomy on company profiles.
🚀Ship Fast & Iterate⚙️Engineering-Driven🎧Deep Work / Low Meetings🌐Remote-Friendly🛡️Safe to Fail
What I'm looking for
Roles
🧠 ML / AI💻 Engineering
Seniority
SeniorStaff
Company size
Small (~50)Medium (~200)
Compensation
EUR 110,000 – 150,000 · equity-heavy OK
Experience
Senior ML Engineer
@ Retrieval Labs
Feb 2023 — Jun 2026
Berlin, DE (Remote)
- Built the retrieval + evaluation pipeline behind a customer-support agent used by 40+ enterprise customers.
- Cut hallucination rate from 6.4% to 0.9% on production traffic by rebuilding the eval loop around real support tickets.
- Owned model migrations across three Claude generations and two OpenAI generations without a customer-visible regression.
- Interviewed 40+ candidates; hired four of the five senior engineers I brought in.
ML Engineer
@ Hume Systems
Aug 2020 — Jan 2023
Berlin, DE
- Second engineering hire. Shipped the first version of an on-device speech-emotion model deployed to two million monthly users.
- Wrote the evaluation harness the whole company still uses.
- Left when the company crossed 60 engineers and product velocity dropped by 3x.
Research Engineer
@ Sennheiser Research
Sep 2018 — Jul 2020
Hannover, DE
- Speech separation and enhancement models. One patent granted, one pending.
- Contributed to two ICASSP papers as second author.
Skills
Applied ML
Expert
Systems
Advanced
Platforms
Advanced
Leadership
Advanced
Projects
Minimal open-source eval harness for LLM apps. 4.1k GitHub stars.
Nightly LLM summary of Hacker News delivered by email. 900 subscribers.
Education
TU Berlin
MSc · Computer Science · 1.3 (top of cohort)
2016 — 2018
Universitat Politècnica de Catalunya
BSc · Telecommunications Engineering
2012 — 2016
Languages
English · Native or bilingualSpanish · Native or bilingualGerman · Professional working
Manifesto
I want to work on things that reach real users, in teams that can still fit around a single dinner table. I care about being able to explain what I did last month to a non-technical friend without embarrassment.