Julia Vos

S

Engineering Manager at Mill Bio · A/B testing, Scala

Mill Bio
Rotterdam, Netherlands · CET (UTC+1)
10+ years experience
EPFL
English, Dutch
Hiring
Messaging unavailable

Overview

I lead search and ranking at Mill Bio in Rotterdam. Shipped a rewrite that took build times from 44 minutes to under 4. Led the migration of 50 services to Scala. Before that: UniCredit and Société Générale. Most at home with Elasticsearch and Java. Jazz piano, badly.

Good reasons to reach out
  • Candidates for the role I'm hiring for
  • Questions about search and ranking
  • Speaking or podcast invitations
  • Thoughtful intros to people in my field
Please don't message about
  • Crypto token projects
  • Courses and coaching offers
  • Offshore staffing offers

Travels often; replies within 48 hours

Skills
learning to rankLuceneA/B testingElasticsearchJavaScala
HiringHiring for a role
closes in 3 months

Looking for a data engineer who has worked on learning to rank at scale

Role
Data engineer
Level
Senior
Type
Full-time
Work mode
Remote within country
Compensation
$160k-$224k + equity
Team
Search, 14 people
Start
Within two months
Must have
Strong SQL and statistics Turns analysis into decisions Ownership of something end to end
Process
3 conversations, no take-home

Comp €76k-€138k. Three interviews over a week. Message me with one thing you shipped that you're proud of.

Rotterdam, Netherlandsjavascalalearning to rank
Open

Experience

  1. Engineering Manager
    Dec 2024 - Present
    Mill Bio · 1 yr 10 mo · Full-time · Rotterdam, Netherlands
    • Shipped a rewrite that took build times from 18 minutes to under 3.
    • Shipped 27 launches on the search team without a rollback.
    • Wrote the A/B testing service that now handles 52 million requests a day.
  2. Software Engineer
    Jul 2021 - Oct 2024
    UniCredit · 3 yr 3 mo · Full-time · Rotterdam, Netherlands
    • Wrote the Java service that now handles 55 million requests a day.
    • Cut p99 latency on the search services from 644ms to 84ms.
  3. Senior Software Engineer
    Mar 2019 - Jul 2021
    Société Générale · 2 yr 4 mo · Full-time · Rotterdam, Netherlands
    • Mentored 10 engineers through their first promotion.
    • Wrote the Lucene service that now handles 67 million requests a day.
  4. Software Engineer
    Oct 2016 - Mar 2019
    Philips · 2 yr 5 mo · Full-time · Rotterdam, Netherlands
    • Brought on-call pages for search down from 12 a week to 2.
    • Shipped a rewrite that took build times from 32 minutes to under 3.

References

No references yet.

Education

  1. EPFL
    MSc, Electrical Engineering
    2018 - 2020
  2. Humboldt University of Berlin
    BA, Electrical Engineering
    2013 - 2016

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