Touko PeltomaaBlogResume

Touko Peltomaa

Lead Software Engineer

Helsinki, Finland linkedin.com/in/toukopeltomaa github.com/peltomaa

Resume

Here's a summary of my experience, showcasing key roles, projects, and the technologies I've mastered.

Lead Software Engineer - Supermetrics
Jul 2025 – Present
Data Warehouse/Storage team
  • Leading frontend development for an external and internal next-gen DWH product
ReactTypeScriptNode.js
Engineering Manager - Supermetrics
2023 – 2025
Various teams
  • Youngest Engineering Manager; led team of 6 developers across the stack
  • Owned IAM and user management for 20,000 weekly active users
  • Architected ClickHouse usage tracking processing 2.1B data points/year
  • Designed onboarding flow capturing 8,000 user surveys (40%), driving org-wide personalization
  • Built scalable Hub information architecture enabling cross-team rapid feature expansion
  • Spearheaded migration from RBAC to granular Permission-Based system across teams
  • Conducted 50+ technical interviews, hired 10+ developers
ReactPHPTypeScriptNode.jsClickHouse
Senior- / Mid Software Engineer - Supermetrics
2019 – 2023
Various teams
  • Led license and billing frontend, generated $500K+ in first-year revenue
  • Built flagship products (Google Sheets, Excel, Data Studio) with React and PHP
  • Redesigned frontend architecture with domain-driven design, introduced React Query
  • Mentored 10+ engineers as chapter lead, led advanced TypeScript workshops
ReactPHPTypeScriptReact Query
Junat Kartalla
2017 – Present
Train tracking app unifying European API data
  • Train tracking app unifying European APIs, ~500K yearly unique users
  • Available on Web, Android, and iOS
TypeScriptReactReact NativeExpoNode.js
Junior- / Mid Software Engineer - OPR-Finance
2017 – 2019
Affiliate traffic management and mobile optimization
  • Built scalable Java Spring Boot API for affiliate traffic management
  • Optimized Cordova / Angular.js mobile app performance
  • Created A/B testable landing pages with Marketing
  • Implemented advanced GTM and Analytics tracking
JavaSpring BootAngular.jsCordovaGoogle Tag ManagerGoogle Analytics
Awards
  • Won Supermetrics 2025 hackathon (100+ participants)
  • Best Developer of the Month for checkout flow frontend work
  • Most hiring code reviews in a quarter at Supermetrics