At Bringin, I owned the full platform as a founding engineer, building payments, KYC, real-time systems, and the React frontend from zero to 10,000+ users.
I designed a transaction state machine, idempotent order creation, multi-provider reconciliation, and failure handling, catching double-spend and idempotency issues before users were affected. I also built SumSub KYC with resumable sessions, improving completion by 20–40%, and delivered DAC8 reporting for tax and regulatory submissions.
I build resilient systems end to end: WebSocket and gRPC payment updates reduced latency from 10–15 seconds to sub-second, while observability, security controls, and internal tooling reduced recurring issues and support effort.
Estonia