Repon Kumar Roy

Software Engineer at Google based in Zurich.
Specializing in Distributed Systems, C++, and High-Performance Computing. Previously at WorldQuant and Grab.

Experience

Software Engineer

Google Switzerland GmbH April 2022 - Present
  • Currently working in Google Trust Services (TLS certificates for all Google domains).
  • Automated password change efficiency improved by 75% in Cupcake Gigafactory.
  • Resolved facebook.com DSL script issue, enabling service for 17% previously unserved traffic.
  • Owned Radio Journeys in Assistant (1.5M daily queries, 94% SAI rate).

Quantitative Developer

Millennium Management (WorldQuant) Dec 2021 - April 2022
  • Implemented highly available Etcd cluster in Kubernetes for distributed locking.
  • Implemented Storage Infrastructure over Network for Alpha Cache to increase throughput.

Senior Software Engineer

Grab Holdings Inc. Aug 2019 - Dec 2021
  • Designed secure AMI rollout pipeline for fast automated updates.
  • Reduced pipeline update runtime from ~45mins to ~3mins.
  • Fixed role sync issue, reducing sync time from ~14mins to 16s.
  • Managed K8s cluster and migrated services.

Research Software Engineer Intern

Cisco Systems (San Jose, US) Aug 2018 - July 2019
  • Designed SDN based Cloud Network Overlay extensions suitable for Enterprise Policy.
  • Implemented sidecar proxy based VNF for consistent policies in cloud and on-prem.
  • Implemented fast shared memory IPC for VPP.

R&D Software Engineer

Works Applications Singapore March 2018 - July 2018
  • Designed a web application that provides intuitive tools to streamline the candidate recruitment processes.
  • Features included auto-evaluation of candidates, finding the optimal assignment of interviewer and schedule, feedback suite to evaluate the candidate’s performance and statistics resulting in 5x decrease in recruiting time.
  • Application developed using Javascript/HTML/CSS with jQuery and bootstrap.

Engineering Projects

Clipy

Modern, privacy-focused clipboard manager for macOS with smart categorization and design.

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Takt

German language learning app with smart POS tagging. Built with Flutter & SQLite.

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Tango

Logic puzzle game with haptic feedback and interactive grid mechanics. Built with React 19 & Vite.

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Equamath

Mathematical puzzle generator and solver. Analyzes solution uniqueness using custom services.

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Book Search

Fast book search engine with SQLite FTS5 backend and Gunicorn/Flask server.

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Open Source Contributions

Spinnaker

Contributed to improving latency to sync LDAP roles, reducing time from 16 minutes to 14 seconds.

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Zlint

Added CRL lints to Zlint, a Go-based X.509 certificate linter checking for standard consistency.

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doctl

Contributed to DigitalOcean's official command line interface for managing infrastructure/droplets.

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Skills

Languages

C++, Python, Java, Go, Kotlin, TypeScript, SQL, Dart

Frameworks & Tools

Kubernetes, Docker, Pandas, Scikit-learn, Spinnaker, Terraform

Expertise

Distributed Systems, Systems Programming, Machine Learning, Algorithms

Education & Awards

BSc Computer Science

BUET (2013-2017)

CGPA: 3.52/4.00. Relevant modules: Algorithms, OS, Distributed Systems, AI.

Achievements

  • Google Kickstart: Rank 34/1156 (Top 2%) - 2017
  • ACM-ICPC Dhaka: 2nd Place (2016, 2017)
  • CodeForces: Rating 2082 (Top 4%) - Candidate Master
  • TopCoder: Rating 1675 (Yellow)

© 2025 Repon Kumar Roy