Oleg Koval markOleg Koval

Looking for a CTO, engineering manager, staff engineer, or fractional lead? EU and remote. Work together or request a CV.

Experience

9 roles · 2012 → present · fintech, payments, APIs, cloud.

  1. 2025 - present

    Lead Engineer

    Bizcuit.nl · Utrecht, NL

    Lead10 engineers

    Fintech PWA: bank connectivity and payment orchestration. End-to-end banking features across backend, frontend, integrations, and releases.

    • SEPA, Verification of Payee, Bulk Attended Use, Bulk Onboarding, webhooks
    • Improved PSP/bank API reliability, latency, and error reporting
    • Led production support, incident response, and release discipline
  2. 2022 - 2025

    Lead Engineer

    brandfetch.com · Remote

    Lead7 engineers

    Digital assets, brand management, CDN. Led design of core public API including the high-scale Logo API.

    • Scaled data pipelines for asset collection and processing
    • AI categorization for asset quality, search, and automated tagging
    • Usage-based billing on Stripe to unlock flexible pricing

Earlier roles

  1. 2021 - 2022
    Senior Software Engineergetbamboo.io · Australia · remote · 6 engineers

    Crypto trading platform - event-driven AWS Lambda microservices (CQRS) processing 80K+ daily transactions. 40% faster trade execution.

  2. 2020 - 2021
    Senior Full-Stack EngineerProject management SaaS (Asana / Monday.com space) · Amsterdam · 8 engineers

    Work management platform for agencies and studios. Led a greenfield module end-to-end on React/TypeScript + Node.js.

  3. 2019 - 2020
    Senior Backend EngineerDott · Amsterdam

    Free-floating e-scooter platform. Serverless event-driven backend on GCP; 30% cloud cost reduction; MDS-compliant public APIs.

  4. 2019
    Senior Software EngineerBugaboo International · Amsterdam

    E-commerce digital transformation. Event-sourced Node.js microservices for high-traffic product launches; ~90% coverage via TDD/BDD.

  5. 2016 - 2019
    Senior Software EngineerWeAreReasonablePeople · Rotterdam

    Software/design agency - healthcare, finance, e-commerce clients. Legacy modernization cut page loads 50% on two major clients.

  6. 2013 - 2016
    Software Engineer (consulting)Startups & agencies · Ukraine

    Short engagements building scalable products, 50+ crawlers, ML/analytics with Python + D3.js, and TDD/BDD strategy for client teams.

  7. 2012 - 2013
    Software EngineerEricsson · Łódź, Poland

    Telecom R&D - automation and tooling for Emulated GSM testing. Co-designed test result management system saving ~50 h/month.