Outhan Chazima — specializing in system design & architecture and applied AI. I turn ambiguous product problems into resilient, distributed systems — and increasingly into LLM-powered features: RAG pipelines, AI agents, and semantic search. Currently engineering travel-tech infrastructure at Triply.co.
Capacity planning, data modeling, API contracts, and trade-off analysis. I design for the failure modes first — then for the happy path.
Event-driven microservices, message queues, idempotency, and eventual consistency — systems that stay correct when networks don't.
Caching strategies, database sharding, horizontal scaling, and load testing to take systems from thousands to millions of requests.
Battle-tested experience building payment rails and transaction systems where double-charges and lost ledger entries are not an option.
Clean, versioned, well-documented interfaces — REST and event APIs that other teams can build on without reading the source.
Architecture reviews, design docs, mentoring engineers, and aligning system decisions with product and business goals.
An event-driven analytics platform that ingests transactions from every company system and surfaces live revenue and profit insights to TV, web and mobile dashboards.
Proprietary — architecture walkthrough available on request
Backend platform for high-volume disbursements across multiple channels, with an Angular operations console. Led the system architecture end-to-end.
Proprietary — architecture walkthrough available on request
Revenue-collection system used across every airport and airstrip in Kenya, including a USSD app and an Android POS for parking-fee enforcement. Led a team of four.
Government deployment — details available on request
Cashless gate-control and revenue-collection system for ferry crossings, integrated with M-Pesa and eCitizen for secure transaction processing.
Government deployment — details available on request
A configurable USSD gateway bridging Safaricom, Airtel and Telkom, with validation checks that let teams stand up new USSD applications quickly.
Proprietary — architecture walkthrough available on request
A Django platform that automates collection, validation and submission of regulatory financial reports to the Central Bank of Kenya for payment service providers.
Proprietary regulatory system — details available on request
Designing and scaling the core platform behind a travel-tech product — booking flows, payment integrations, and the services that hold them together.
Designed and led payment, revenue-collection and analytics platforms at one of Kenya's established fintech players — high-volume transaction processing where correctness is everything.
Full-stack product development — shipping features end to end and building the engineering fundamentals that later grew into an architecture focus.
Mathematical foundations behind the engineering — plus IBM Big Data Engineer Explorer & Mastery awards (2019) and a Google Africa Development Scholarship.
Every dependency will eventually time out, duplicate, or lie. Good architecture assumes it from day one.
Proven tools, well-understood patterns. Novelty belongs in the product, not in the production database.
If a system can't be explained on one whiteboard, it can't be debugged at 3 a.m. either.
Capacity decisions come from numbers — load tests, p99 latencies, and growth curves — not vibes.
Consulting on system design, architecture reviews, or senior engineering roles — I'm one message away.