Sergio Nuno Gonzalez

Sample

Backend Engineer at Quill Works | ex-SAP

Quill Works
Barcelona, Spain · CET (UTC+1)
3+ years experience
École Polytechnique
English, Spanish
Messaging unavailable

Overview

I work on payments infrastructure at Quill Works in Barcelona. Brought on-call pages for payments platform down from 21 a week to 1. Previously at SAP. Most at home with distributed systems and Java. Coffee nerd.

Good reasons to reach out
  • Second opinions on Java decisions
  • Thoughtful intros to people in my field
Please don't message about
  • SEO and link-building offers
  • Requests to fix your code for free

Answers in batches on Fridays

Skills
PCI DSSperformance engineeringJavaPostgreSQLgRPCdistributed systems

Experience

  1. Backend Engineer
    Sep 2025 - Present
    Quill Works · 1 yr 1 mo · Full-time · Barcelona, Spain
    • Took payment success rates from 92.9% to 96.1%.
    • Wrote the distributed systems service that now handles 82 million requests a day.
  2. Backend Engineer
    Oct 2023 - Sep 2025
    SAP · 1 yr 11 mo · Full-time · Barcelona, Spain
    • Took payment success rates from 92.9% to 96.2%.

Projects

Open-source gRPC toolkit
2025

A small library for payments infrastructure that 98 developers star on GitHub.

References

No references yet.

Education

  1. École Polytechnique
    Ingénieur, Computer Science
    2018 - 2022

Details

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