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John S
@jsimiyu
Senior Backend Engineer
Kenya
English
About me
Senior Backend Engineer specialising in production backend systems, APIs, fintech infrastructure, identity, and enterprise integrations. I work mainly with Java and Spring Boot, with experience in Python, Go, and Node.js/Express. I’ve built financial transaction systems, investment platforms, enterprise SSO, legacy integrations, large-file infrastructure, and API/data platforms using PostgreSQL, Kafka, Keycloak/OIDC, and Docker.
Skills
John S
Offline •
Average response time: 1 hour
See my services
Full Stack Web Applications
I will build your spring boot vaadin business web application
API & Integrations
I will build a scalable backend API for your application
Work experience
Senior Backend/Platform Engineer
Invest Africa • Full-time
Aug 2021 - Present • 5 yrs 2 mos
Investment core, financial engines, lending/payment systems.
