Leads.io (formerly Social Blue)
Technical Lead, Social Blue / Lead Software Development Engineer, Leads.io
Hoorn, Netherlands · performance-marketing group: 11 offices, 9 countries, ~240 people after the 2022 merger
- Led two teams (Client Portal: 5 engineers; Finance/Count: 3) in an engineering department of ~20, while writing production code throughout.
- Co-designed and built the event-driven central API connecting the company's seven internal services (client portal, finance, lead collection, landing-page builder, lead marketplace, revenue tracking, NetSuite). Owned idempotency, sync/async boundaries and data corrections. Ran for years without needing attention.
- Replaced live BigQuery queries in client reporting with hourly, client-scoped cached JSON: report load time from ~27 s to ~250 ms for 100+ clients, and no cross-client data exposure through reporting queries.
- Rewrote the monthly lead-approval flow in the client portal (clients review and reject delivered leads). From the most unstable system in the department to no incidents in its final year.
- Built the Oracle NetSuite integration (invoicing, multi-currency lead bundles, customer management) as a reusable Eloquent-style module; the team shipped features and resolved tickets faster against one consistent interface.