BACKEND LEANING
FULLSTACK ENGINEER
- b2b saas & erp systems, multi-tenant architecture
Four years specializing in backend systems for B2B SaaS and ERP products. Right now I'm running two of my own.
- founder, bizbora & kaziflow
Nashon Ernest
Products, live in the wild
Three platforms I’ve founded and shipped myself, each one running real businesses today. Not demos.
Where I’ve worked
BizBora Hub Ltd
Founder & Software Engineer
Jan 2026, Present · Nairobi, Kenya
- Built and run BizBora, a cloud ERP now used by 5 businesses across 8 store locations. It's multi-tenant: one shared app and database, but each business only sees its own inventory, sales, procurement and accounting.
- Built and run KaziFlow, a B2B SaaS platform 8 businesses use daily for CRM, invoicing, payments and accounting. Payment handling is idempotent, so a retried request can't double-charge or double-record a customer.
- Handle 20 to 40 peak concurrent sessions across 13 onboarded businesses by caching the data that gets hit hardest, and lead a small team of 2 engineering interns.
Next.js, FastAPI, PostgreSQL, Redis
Axesoft Ltd
Founding Software Engineer
Mar 2024, Dec 2025 · Nairobi, Kenya
- Shipped 15+ systems for outside clients, from requirements through to production. Custom ERPs, web apps, mobile backends.
- Wrote REST APIs and transactional services in Python and FastAPI, plus Node.js and Express, with React and React Native clients on top.
- Designed schemas mostly in PostgreSQL, with MongoDB on a few projects, and set up JWT and OAuth 2.0 authentication across the board.
- Replaced paper and spreadsheet processes with proper digital workflows. Cut manual processing time by up to 40% for some clients.
Python, FastAPI, Node.js, React, PostgreSQL
Digisoft Solution Limited
Software Engineer
Oct 2023, Jul 2024 · Nairobi, Kenya
- Built and maintained mobile and web apps with React Native and Laravel, across the full development cycle.
- Redesigned the screens and flows behind most support tickets. Support requests dropped 25%.
React Native, Laravel, MySQL
Real Biz Digital
Software Engineer Intern
Oct 2022, Jan 2023 · Remote
- Worked on 10+ web apps using Node.js and React, and helped maintain older codebases.
- Wrote test cases that caught bugs earlier, which sped up delivery by around 30%.
React, Node.js
CodeJika
Volunteer Code Coach
Aug 2022, Dec 2023 · Remote
- Taught web development basics to high school students across Africa and mentored student-run coding clubs.
Where I’m useful
B2B SaaS & ERP systems
My specialty. Multi-tenant architecture, data modeling, and workflows shaped around how your business actually operates, not a generic template. I've built and still run two of these myself.
Backend & API development
REST APIs, authentication, and the data layer underneath them, including payment flows that can't afford to double-charge someone. FastAPI/Python or Node.js/TypeScript, whichever fits what you're already running.
Technical consulting
A second opinion on your stack, your architecture, or a system someone else built. I'll tell you plainly what's solid, what's fragile, and what I'd change first.
Mentorship
I've coached developers on real production code, not tutorials. If you want someone to pair with your team or review their work honestly, I'm happy to help.
About
I specialize in backend systems for B2B SaaS and ERP products: multi-tenant architecture, API design, and payments that have to work correctly every time, not most of the time. Most of my work is FastAPI/Python, or Node.js/TypeScript and Java/Spring Boot depending on what the client already runs, with React and Next.js on the front end when a project needs that too. Right now I run BizBora Hub, where I built and still operate two live products: an ERP that five businesses use, and a SaaS platform eight companies use every day for invoicing and CRM. Before that I was the founding engineer at a software consultancy, where I shipped fifteen different systems for outside clients.
Outside client work I’m doing an MBA with a focus on AI for business. I like understanding not just how a system runs, but why the business needs it to run that way.
Toolbox
Languages
TypeScript, JavaScript, Java, Python, SQL
Frameworks
React, Next.js, React Native, Spring Boot, Node.js, Express, FastAPI, Django, Laravel
Backend & APIs
REST, gRPC, GraphQL, API design, auth & authorization
Databases
PostgreSQL, MySQL, MongoDB, Redis
Cloud & infra
AWS, Azure, Vercel, Koyeb, CI/CD