OBADIA KIPNGENO KERICH

Own feature delivery for WiseStella, handling design through deployment in a distributed engineering environment. Built production features including a natural-language query capability powered by an LLM layer so operational users can ask questions in plain language. Designed and secured REST APIs connecting internal services and third parties, replacing ad hoc integrations with a consistent API layer. Automated recurring operational workflows that were previously handled manually. Act as a primary point of contact for production issues, diagnosing and resolving incidents to restore service. Partner with product and engineering teams to translate operational requirements into shipped features, while writing and maintaining technical documentation for deployment and onboarding.

Independently designed and built DetectPay, a mobile fintech application enabling customers to discover nearby merchants and pay via M-Pesa. Owned architecture, backend services, and database model from scratch. Implemented Row Level Security (RLS) and role-based access control (merchant, admin, super-admin) to protect transaction and profile data. Integrated Safaricom Daraja APIs for real M-Pesa payment flows, including callback verification and edge cases. Built the Flutter Android and iOS client backed by Supabase and PostgreSQL, using AI-assisted tools to accelerate delivery while keeping core architecture and security decisions manual.

Led development of enterprise SaaS applications for international clients from requirements through production release. Owned backend architecture including database design and REST API integrations with third-party platforms. Extended an existing product line with OpenAI-powered functionality. Automated workflow steps that previously required manual coordination between teams. Ran integration and regression testing ahead of releases to reduce production defects. Mentored junior developers through code reviews and pairing on backend design decisions, and produced documentation for APIs, database schema, and system architecture used by the team.