Tomisin Leshi
Backend engineer. Five years at LINK building the systems that move money across African borders.
Value Insight
I specialise in the reliability layer: event-driven systems, outbox patterns, idempotency guarantees, and corridor routing that survives a provider failing mid-flow. I design the architecture, write the code, and operate what I ship.
Proof of Work
- 1:Designed a multi-corridor routing layer that evaluates providers in real time and handles guaranteed webhook delivery, reconciliation, and settlement failover.
- 2:Built BridgeCore: an event-driven payments core using Kafka, the outbox pattern, and an idempotency layer so no payment runs twice.
- 3:$270K+ in Stellar Community Fund grants for building compliant cross-border payment infrastructure.
- 4:Shipped a SEP-24 anchor on Stellar handling interactive deposit and withdrawal flows, with KYC built in.
- 5:Issued a naira-backed stablecoin on Stellar, Ethereum, Polygon, Arbitrum and Base, with $2M+ in on-chain volume.
Where I Worked
- Own the technical direction of the payments platform: architecture, infrastructure, reliability and the engineering roadmap.
- Designed the routing layer that picks the best provider for each currency pair. Three to four million dollars has moved through it.
- Grew the engineering team from just me to four engineers across backend, frontend and security.
- Secured three Stellar Community Fund grants for infrastructure work.
- Sat in on provider and partner negotiations and architecture reviews.
- Moved the v1 retail product onto the upgraded platform through an API service.
- Set up the architecture and code review practices the team still uses.
- Acted as the bridge between founding decisions and day-to-day delivery.
- Built the product's first customer-facing screens, including onboarding and transaction flows for the v1 retail web app.
Introduced microservices for POS and wallet integration, and built the REST API behind daily mobile POS and wallet requests.
Built Python/Django endpoints for an AI business dashboard serving 2K+ concurrent users.
Programmed control and telemetry for an autonomous underwater vehicle, with PID-based navigation in C++.
How I Build
Most bugs live in the gaps: between your API and the next service, between an event and its handler, between what you log and what actually happened. The stack I reach for makes those gaps visible.
Education
Executive Development Programs, Architectural and Building Sciences
Blockchain, Web3 Developer
Bachelor of Engineering, Computer Software Engineering
Activities: Robotics, basketball, Dance