I build backend systems that don't break under pressure — 4,107 events/sec webhook delivery at p95 8ms, 96.1% document extraction accuracy on financial documents, 88% latency reduction on a national messaging platform. 15+ years designing high-throughput platforms, multi-tenant SaaS, Fintech infrastructure, and distributed systems across Africa, the UK, and globally.
I specialise in the hard backend problems — systems that need to be fast, consistent, recoverable, and maintainable at scale. I've rescued systems others gave up on, scaled platforms to 10k+ concurrent users, and shipped production infrastructure for healthcare, government, and financial services.
- Architecture — multi-tenant SaaS, event-driven systems, distributed transaction design
- Platform engineering — CI/CD pipelines, containerised deployments, observability stacks
- Fintech — subscription billing, payment gateway integration, idempotent financial workflows
- AI integration — LLM-powered features wired into production backend systems
Languages & Frameworks
Data & Messaging
Cloud & DevOps
AI & Integrations
| Repo | What it is | Stack |
|---|---|---|
| hookstream | Webhook delivery engine — 4,107 ev/s at p95 8ms, guaranteed delivery, circuit breakers, AI diagnostics | TypeScript · Redis · BullMQ · Kubernetes |
| finparse-ai | AI document parser — 96.1% field extraction accuracy on South African financial documents | Python · FastAPI · Claude Vision · AWS S3 |
| nexus-scheduler | AI-powered scheduling API with natural language booking, concurrency-safe slot reservation | TypeScript · Anthropic · Redis · WebSockets |
| recon-engine | Transaction reconciliation service — ~2,400 records/sec, exact + fuzzy matching, discrepancy reporting | Python · Django 5 · Celery · PostgreSQL |
| billing-worker | Subscription billing processor — Stripe charges, retry dunning, webhook reconciliation | Python · FastAPI · Celery · SQLAlchemy |
| devpulse | GitHub activity intelligence platform with AI-generated developer profiles | TypeScript · Prisma · GitHub API · Claude |
| saas-multitenant-kit | Production multi-tenant SaaS boilerplate — tenant isolation, plan gating, Stripe + Paystack | Laravel · PostgreSQL · Paystack · Docker |
| pharmacy-data-sync | Healthcare dispensing data sync — incremental facility sync, bulk insert, Celery workers | Python · Django 3.2 · PostgreSQL · Redis |
| nodebase | Self-hosted backend-as-a-service — auth, document store, WebSocket subscriptions, zero dependencies | Java 21 |
2006 ──── Backend & systems engineering, Government of Malawi (payroll, HR, national-scale B2B)
2012 ──── High-throughput messaging platform — reduced latency 88% (3hrs → <20min)
2016 ──── Enterprise systems: Samsung, MTN, Cell C, UK NHS · spring-audit-service (2018)
2019 ──── Real-time fleet tracking, CI/CD overhaul (-70% deployment failures)
2020 ──── National pharmacy & healthcare systems, City of Cape Town · pharmacy-data-sync
2021 ──── Subscription billing & recurring payments at scale — FlexClub · billing-worker
2022 ──── Enterprise logistics, inventory & financial system integration — Emendis · recon-engine
2024 ──── Multi-tenant hotel SaaS, rescued 3 stalled modules — RoomRaccoon
2025 ──── hookstream: 4,107 ev/s webhook engine · finparse-ai: 96.1% doc extraction · nexus-scheduler: NL booking API · CapeRidaz · Calendrax
📍 Cape Town, South Africa | Open to remote & hybrid roles
📧 yowelikachala@gmail.com | LinkedIn | www.caperidaz.com