HomeWork

A track record of delivery.

Selected case studies from across our portfolio — each representing a real engineering challenge, a deliberate approach, and a measurable outcome.

Enterprise Analytics Dashboard for Kazi Analytics
Featured Case Study
SaaS Platform

Enterprise Analytics Dashboard for Kazi Analytics

Kazi Analytics needed to rebuild their core reporting platform from scratch — the existing system was too slow to query, too rigid to extend, and too brittle to trust. We rebuilt it from the ground up with ClickHouse as the analytical engine, a React front end, and a Node.js API layer.

12×
faster query performance
50M+
daily events processed
<180ms
avg. query latency
99.9%
uptime since launch
ReactNode.jsClickHouseAWSTerraform
Fintech
Fintech

Payments Infrastructure Rebuild

Re-architected a payments system processing 10,000+ daily transactions. Introduced multi-provider failover, PCI-compliant tokenisation, and real-time reconciliation.

GoPostgreSQLKafkaKubernetes
API throughput
99.97%
uptime SLA
B2B Marketplace
B2B Marketplace

Soko Procurement Platform

Full-stack B2B marketplace with real-time inventory, multi-vendor management, integrated logistics APIs, and a buyer analytics dashboard built for 200+ enterprise clients.

Next.jsGraphQLRedisGCP
200+
enterprise clients
page speed gain
AI Integration
AI Integration

Intelligent Document Review System

Built an LLM-powered document classification and extraction pipeline for a legal-tech company. Reduced manual review workload by 70% and improved extraction accuracy to 94%.

PythonAnthropic ClaudepgvectorFastAPI
70%
workload reduction
94%
extraction accuracy
HealthTech SaaS
HealthTech SaaS

Rafiki Health Patient Management

End-to-end patient management and telemedicine platform for a network of 40 clinics across East Africa. Offline-first architecture built for low-connectivity environments.

React NativeNode.jsCouchDBAWS
40
clinics deployed
100%
offline capable
Cloud & DevOps
Cloud & DevOps

Infrastructure Modernisation

Migrated a monolithic application to a containerised microservices architecture on Kubernetes. Reduced deployment time from 3 hours to 8 minutes, with zero-downtime deploys.

KubernetesTerraformGitHub ActionsDatadog
95%
deploy time reduction
0
downtime deploys
EdTech Platform
EdTech Platform

Stawi Learning Management System

A scalable LMS built for 50,000+ learners across Sub-Saharan Africa, with adaptive content delivery, progress analytics, and a mobile-first design optimised for low-bandwidth.

Next.jsNode.jsPostgreSQLCloudFront
50K+
active learners
2s
avg. load on 3G
Industries

Built across sectors that demand reliability.

Our experience spans industries where software failure has real consequences — which is why we engineer with the rigour that every sector deserves.

Fintech & Payments

High-throughput transaction systems, PCI compliance, and real-time reconciliation.

Healthcare

Patient management, telemedicine, and clinical data systems built for African contexts.

B2B Marketplace

Multi-vendor platforms, procurement systems, and supply chain digitisation.

EdTech

Learning management systems optimised for low-bandwidth, high-engagement contexts.

Data & Analytics

Real-time dashboards, data pipelines, and self-serve analytics platforms.

AI & Automation

Intelligent workflows, LLM integrations, and document intelligence systems.

Pawa PaymentsNairobi, Kenya
"Gathai Systems didn't just deliver code — they challenged our approach, proposed a better architecture, and built something we're proud to put our name on. The quality of work and the quality of communication were both exceptional."— Amara Kamau, CTO, Pawa Payments
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Your project could be next.

We take on a selective number of new engagements each quarter — ensuring every client receives our full attention.