2019 — present
STX Group, Amsterdam
- Senior Software Engineer2024 — present
- Software Engineer2019 — 2024
Key techTypeScript · React · Vue.js · Node.js · OpenSearch · Postgres · AWS CDK · Kafka
- Joined when engineering was ~3 people and stayed through growth to 80+. Established frontend as a business capability — introduced Vue.js and demonstrated how better UI improved trade-entry speed and reduced errors, making the case for the company's first dedicated frontend role; then built the function from scratch, including hiring, interview loops and onboarding for four engineers.
- Rebuilt the Bid & Offer application from a tool traders were bypassing into one they open daily — reworked query paths, pagination and rendering to eliminate browser crashes on 20k+ record grids and bring loads down to seconds, recovering bid/offer and spread data analysts had been losing. Now handles hundreds of daily entries across three continents.
- Own the Sales Margin service company-wide — replaced file-based margin calculators with a structured P&L capture system; own the APIs and event handlers end to end, including snapshot correctness when trade data changes after capture; ran rollout, training and hypercare.
- Lead design and delivery of the end-to-end counterparty KYB flow across HubSpot, internal pre-trade services, Trulioo, webhooks and core counterparty systems — setting architecture while staying hands-on and guiding junior and mid-level engineers.
- Led the monolith-to-microservices migration, improving reliability and deployment speed across teams.