I architect and deliver production-grade web platforms, intelligent AI systems, mobile applications, and end-to-end automation pipelines — engineering scalable solutions that solve real operational problems. Based in Nairobi, serving clients globally.
I'm Simon — a Full-Stack Engineer with 3+ years of experience delivering production-grade digital systems across diverse domains. My work spans the entire software stack: from precision-crafted React interfaces to robust Django, Flask, and C#/.NET backend architectures.
My technical edge is breadth with depth: I architect cloud-native solutions on Azure, design normalized database schemas in PostgreSQL and SQL Server, wire intelligent AI pipelines using OpenAI and Claude, and ship cross-platform mobile apps in React Native and Kotlin.
I'm driven by solving real operational problems — automating workflows that save hours every day, building platforms that serve thousands of users reliably, and engineering integrations that unlock measurable revenue. From Nairobi startups to global clients.
End-to-end web platforms with React frontends and Django/Flask/C# backends. Multi-role access control, real-time features, and clean API design from the ground up.
Enterprise-grade APIs, desktop applications, and real-time backend services with ASP.NET Core, Entity Framework, and SignalR. Battle-tested and production-ready.
Cross-platform mobile apps with React Native and native Android with Kotlin. Rich UX, offline support, push notifications, and Play Store deployment.
Deploy, scale, and manage your application on Microsoft Azure. App Service, Blob Storage, Azure SQL, Functions, and CI/CD pipelines via GitHub Actions.
Integrate GPT-4o, Claude, or custom AI pipelines into your product. RAG systems, chatbots, document analysis, and intelligent workflow automation.
Normalized schema design, complex queries, migrations, and performance optimization. PostgreSQL, SQL Server, and Azure SQL for transactional and analytical workloads.
Python scripts and scheduled jobs that eliminate manual work — report generation, data sync, scraping pipelines, email automation, and more.
Stripe subscriptions, M-Pesa Daraja, and PayPal — fully integrated payment flows, webhooks, invoicing, and subscription management for any platform.
Data analysis pipelines, machine learning models, dashboards, and BI integrations — transforming raw data into operational insights and automated decisions.
An end-to-end SaaS platform that manages the full lifecycle of academic assignment fulfillment — from client order submission through writer assignment, delivery, revision, payment allocation, and automated invoicing. The system enforces role-based access for students, writers, and administrators, with a performance analytics dashboard that tracks writer ratings, completion rates, and revenue flows. Deployed on Azure with a PostgreSQL backend.
A full-stack property management platform that centralises tenant lifecycle management, automated rent billing, M-Pesa payment reconciliation, and maintenance workflow tracking within a single landlord-agent portal. The billing engine runs on a scheduled pipeline that generates statements, sends M-Pesa payment prompts via Daraja API, and updates ledgers automatically — eliminating manual rent collection entirely.
A dedicated platform that orchestrates the full research services workflow — from project brief submission and researcher matching through milestone tracking, secure file exchange, payment processing, and a structured review-and-revision cycle. The payment module supports Stripe and M-Pesa with webhook-driven status updates, keeping clients and researchers in sync at every stage.
A multi-property operations dashboard that gives agency managers a real-time view of portfolio performance — occupancy rates, rent collection status, maintenance request queues, and agent activity summaries. Built as an administrative layer on top of the Civet property management platform, enabling branch-level reporting and cross-property financial analysis.
A data science-driven agricultural platform that transforms daily farm operations data into actionable intelligence. The system ingests crop monitoring readings, livestock health records, and weather signals to power predictive yield models and surface prioritised decision recommendations through an operations dashboard — helping farm managers act on insight rather than intuition.
An automated billing platform for water utility providers that replaces manual meter-reading and statement workflows with a fully digital pipeline. The system manages tenant accounts, processes field-officer meter readings via a companion mobile interface, applies a tiered pricing engine, dispatches bulk SMS notifications via Twilio, and reconciles M-Pesa payments — reducing billing cycle time from days to minutes.
A multi-department healthcare operations platform covering patient record management, appointment scheduling, clinical billing, laboratory result routing, and pharmacy inventory — all consolidated under role-based staff portals. The system generates PDF clinical reports and financial statements on demand, with a Celery-powered notification layer that keeps patients and clinical staff informed at each care stage.
A real-time device telemetry platform that ingests event streams from monitored mobile endpoints, applies an OpenAI-powered anomaly detection layer, and surfaces geofencing violations and threat flags to an operator dashboard over WebSockets. The AI pipeline classifies behavioural deviations automatically, reducing manual review overhead and enabling faster incident response.
An intelligent document retrieval platform that allows legal and HR teams to query large document repositories in natural language. Uploaded PDFs are chunked, embedded, and indexed into a vector store; a LangChain-orchestrated RAG pipeline routes queries to the Claude API and returns cited, context-grounded answers — dramatically cutting document review time for compliance-heavy workflows.
A full-featured commerce platform that handles product catalogue management, shopping cart logic, Stripe subscription billing with proration, PayPal checkout fallback, and a seller analytics dashboard. The platform automates transactional communications via SendGrid and integrates a flexible coupon and discount engine to support promotional campaigns without manual intervention.
We define the problem, goals, users, and constraints. No assumptions — clear scope before any code is written.
System design, database schema, API contracts, and tech stack decisions — all documented and agreed upfront.
Iterative development with weekly updates, staging environments, and transparent communication throughout.
Deployed to production, tested, documented, and handed over with full support. Long-term partnerships welcome.
I'm currently open to freelance projects, contract work, and full-time engineering roles. Whether you have a fully-scoped project or just an idea — reach out and let's talk.