Lisa Janssens

Overview

Currently at Mollie, where I work on real-time systems. Shipped 18 launches on the real-time team without a rollback. Before that: Telefónica and Feedzai. Most at home with low-latency systems and Go. I coach a junior basketball team.

Replies on weekday evenings

Experience

1. Principal Engineer

   Apr 2023 - Present
   Mollie · 3 yr 6 mo · Full-time · Amsterdam, Netherlands
   • Sit on 4 boards.
   • Previously an operator for 6 years before investing.
   • Backed 30 founders at pre-seed and seed.
2. Senior Engineering Manager

   Nov 2019 - Apr 2023
   Telefónica · 3 yr 5 mo · Full-time · Amsterdam, Netherlands
   • Shipped 12 launches on the real-time team without a rollback.
   • Moved 89% of real-time traffic off a legacy monolith without a customer-facing incident.
3. Software Engineer

   Sep 2018 - Nov 2019
   Feedzai · 1 yr 2 mo · Full-time · Amsterdam, Netherlands
   • Cut p99 latency on the real-time services from 850ms to 144ms.
   • Wrote the low-latency systems service that now handles 73 million requests a day.
4. Senior Software Engineer

   May 2016 - Sep 2018
   UBS · 2 yr 4 mo · Full-time · Amsterdam, Netherlands
   • Led the migration of 31 services to Elixir.
   • Shipped 23 launches on the real-time team without a rollback.
5. Software Engineer

   Sep 2014 - May 2016
   Delivery Hero · 1 yr 8 mo · Full-time · Amsterdam, Netherlands
   • Wrote the Erlang/OTP service that now handles 84 million requests a day.
   • Cut p99 latency on the real-time services from 398ms to 162ms.

No references yet.

Education

1. École Polytechnique

   Ingénieur, Mathematics
   2000 - 2004