Open to opportunities

Allen Muhani

@allenmuhani1

Message

I’m a senior backend engineer building cloud-native Node.js APIs for fintech, payments, and blockchain platforms.

Kenya

Message

What I'm looking for

I’m looking for a remote-first team where I can take ownership, solve real client problems, and keep raising engineering craft—building cloud-native APIs, strengthening testing/CI, and delivering measurable performance and reliability improvements.

I’m a senior backend engineer with 8+ years building high-traffic, production-grade APIs and services across Node.js, TypeScript, and Java for fintech, payments, and blockchain-native platforms.

I specialize in RESTful and event-driven architectures, relational database design, Redis caching, and cloud-native AWS deployments—helping teams raise engineering standards through automated testing, clean code, and best practices.

Across roles, I’ve engineered high-availability REST/WebSocket services, designed Kafka-based async services, reduced database read load by 70%, improved API response times, and built CI/CD and test suites with 85%+ coverage—delivering reliable, low-latency systems and fewer production defects.

Experience

Work history, roles, and key accomplishments

Co-Founder & Backend Lead

Java Nash

Jan 2022 - Jan 2025 (3 years)

Designed and built high-availability REST and WebSocket APIs and event-driven backend services for real-time marketplace and multi-chain payments platforms. Reduced database read load by 70% with Redis, achieved sub-10ms p99 responses via schema/query optimisation, and improved software quality with 85%+ test coverage and 60% fewer production defects.

TypeScript NestJS REST APIs Kafka PostgreSQL Redis

Technical Product Manager

Mtek

Jan 2020 - Jan 2022 (2 years)

Led backend delivery of a high-volume B2B payments platform in Node.js and Spring Boot, processing millions of monthly transactions across mobile money and card rails. Implemented schema-first REST APIs for multiple PSP/bank integrations, optimised MySQL for SLAs under 10x traffic spikes, and reduced resilience issues by refactoring legacy sync RPC calls into Kafka-based messaging.

Spring Boot B2B Payments REST APIs Contract Testing

Backend Engineer

Wakala

Jan 2019 - Jan 2020 (1 year)

Built Node.js backend services integrating on-chain smart contracts (ERC-20, ERC-4626, ERC-721) and exposing clean REST APIs for dApp consumption. Integrated The Graph as an indexing layer to serve queryable contract events, improving p95 latency by 40% and delivering zero critical post-go-live incidents.

Hardhat Graph GraphQL REST APIs CI CD

Software Engineer

Grandtech

Jan 2018 - Jan 2019 (1 year)

Built backend services for a domestic payments engine with RTGS and EFT integrations, implementing robust REST and host-to-host integration flows with full exception-handling coverage. Authored technical architecture documentation that became the internal standard for API design patterns and integration best practices.

REST APIs Payment Integration RTGS And EFT Integration Best Practices