Open to opportunities

Kehinde Hussein Fasunle

@kehindehusseinfasunl

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Senior fullstack engineer with 5+ years building resilient event-driven apps, secure APIs, and scalable cloud systems.

Nigeria

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What I'm looking for

I’m looking to build and lead full-stack systems—event-driven pipelines, secure APIs, and reliable cloud deployments—where I can improve performance, strengthen testing, and mentor engineers to ship production-ready software with confidence.

I’m a senior fullstack engineer with 5+ years architecting resilient full stack applications, event-driven pipelines, and secure APIs. I bring deep expertise in TypeScript, Python, and Go with container orchestration on Kubernetes and EKS.

I’ve consistently reduced operational friction and improved reliability—like cutting delivery latency from 11 seconds to 2.3 seconds for high-volume notifications, and delivering real-time chat at scale with low message propagation. I’ve also led idempotent event and webhook systems that improved payment success rates, reduced duplicate partner issues, optimized database performance, and strengthened test coverage while mentoring junior engineers.

Experience

Work history, roles, and key accomplishments

Senior Backend Engineer

LuftSocial

Aug 2025 - Jan 2026 (5 months)

Designed and deployed a fault-tolerant notification and scheduling system handling 200k+ daily push/email/in-app notifications across time zones. Architected real-time chat infrastructure, idempotent message persistence, and an AI feature onboarding framework while improving reliability through testing and migration strategies.

Scheduling Redis Exponential backoff Integration Testing Socket.IO RESTful APIs PostgreSQL Read Replicas

Senior Fullstack Engineer

CloudPay (Fintech) / MMG (Ecommerce)

Jan 2022 - Jan 2025 (3 years)

Architected an event-driven payments orchestration engine for debit cards, bank transfers, and USSD channels, improving payment success and delivery reliability. Built an idempotent webhook gateway, enforced contract testing, and optimized database and AWS RDS performance while increasing TDD test coverage.

Event Driven Architecture Payment Orchestrators Kafka Webhooks Exactly Once Delivery Contract Testing P95 Latency Tuning AWS RDS Index Tuning Materialized View Caching TDD

Fullstack Engineer

VibeMap

Jun 2020 - Dec 2021 (1 year 6 months)

Built a real-time event location API and supporting event creation/RSVP system for 50k+ monthly users. Implemented geospatial search with PostGIS, concurrency-safe overbooking prevention, idempotent payment webhook consumers, and an admin dashboard with real-time attendee analytics.

PostGIS Timezone Boundary Edge Cases RSVP Systems Optimistic Locking Webhooks Paystack Webhooks Dashboards Analytics