Welcome to my portfolio
Aaron Masembe
Full Stack Software Engineer & DevOps
Full-Stack Software Engineer specialising in system architecture, backend development, mobile engineering, and DevOps. Builder of production-grade platforms in Go, Flutter, and Next.js — from HMAC-signed QR ticketing to Airtel Money payment gateways.
📍 Lusaka, Zambia
📧 aaronmasembemujabikalibala@gmail.com
📱 +260777451194
Core Stack
49+
DB Tables
68+
REST Endpoints
22
RBAC Roles
About Me
Full-Stack Software Engineer with hands-on experience in system architecture, backend development, mobile engineering, and DevOps. I independently designed and built a production-grade multi-surface transport management platform in Go, Flutter, and Next.js — featuring 49+ database tables, HMAC-signed QR ticketing, offline-first mobile architecture, real-time GPS tracking, and mobile money payment integration.
At Mamastops Logistics, I led the architecture of production payment gateways (Airtel Money, e-toll), delivered Odoo ERP integrations, and deployed Grafana/Prometheus observability infrastructure on Kubernetes clusters on AWS.
Beyond engineering, I'm passionate about mentoring others in technology and innovation — having led teams in robotics competitions and STEM education initiatives. I believe technology should be accessible and empowering for everyone.
Education
Bachelor of Science in Information Technology with Education
The Copperbelt University • December 2024
Grade 12 Certificate
Kamenza Secondary School • November 2019
Achievements
- ✓Huawei Seeds for the Future 2023 — Best Team in Zambia
- ✓JETS 2024 Mentor — Led team to 3rd place in Robotics & 1st in Software Innovations
- ✓Team to represent Muchinga Province at the national JETS competition
Skills & Expertise
Programming Languages
Frameworks & Platforms
Backend & APIs
Databases
System Design & Architecture
Mobile Development
DevOps & Cloud
Integrations
Monitoring & Logging
Other Skills
Experience
Software Engineer (Backend & DevOps)
Mamastops Logistics Solutions
May 2025 – Present
Lusaka, Zambia
- →Implemented Airtel Money payment integration: designed and built RESTful endpoints and webhook handlers to initiate payments, receive asynchronous confirmations, and reconcile transactions in production.
- →Delivered Odoo ERP integration to synchronise invoices, partners, and operational data between the logistics platform and Odoo, improving reconciliation and reporting workflows.
- →Built robust API patterns (authentication, idempotency, retries, validation) and structured logging to ensure reliable processing of external callbacks and payment flows.
- →Containerised services with Docker, deployed on Kubernetes clusters on AWS, and built CI/CD pipelines via GitHub Actions to automate releases.
- →Set up Grafana and Prometheus observability stack to monitor platform health and track business KPIs, enabling data-driven decision-making.
- →Designed full system architecture for the mobile money payment gateway and e-toll integration, defining service boundaries, data flows, and API contracts from the ground up.
- →Developed internal helper tools and report generators to automate custom client and operations reports used by partners and operations teams.
- →Collaborated with cross-functional teams to deliver feature updates, troubleshoot production issues, and roll out performance improvements.
Junior IT Technician
Chililabombwe Municipal Council
December 2024 – April 2025
Chililabombwe, Zambia
- →Conducted network tests and troubleshooting.
- →Performed software installation, security checks, and hardware maintenance (desktops, laptops, switches, and printers).
- →Developed software solutions for managing printers on a Metropolitan Area Network.
Teaching Practice
Kenneth Kaunda Secondary/STEM School
May 2024 – July 2024
Chinsali, Zambia
- →Conducted IT and STEM-based classes, integrating modern technologies into teaching practices.
- →Managed classroom projects, providing mentorship and guidance to students in technology-related activities.
- →Developed strong organisational and decision-making skills through curriculum planning and classroom management.
Featured Projects
Transport Management System
FeaturedProduction-grade multi-surface transport platform for Zambia's public transport sector. Backend: Go (Gin/GORM) API with 49+ PostgreSQL tables, 22-role RBAC, JWT + TOTP auth, HMAC-signed QR ticketing, Haversine geospatial bus tracking, and 68+ REST endpoints. Mobile: Two Flutter apps (passenger + offline-first crew). Web: Next.js + TypeScript dashboard with role-aware views. Payment architecture supporting MTN MoMo, Airtel Money, and Zamtel via Africa's Talking with USSD fallback.
Mobile Money Payment Gateway
ProductionDesigned and implemented end-to-end Airtel Money payment integration for Mamastops Logistics: RESTful endpoints, asynchronous webhook handling, transaction reconciliation, and idempotent payment flows. In production processing live cashless payments.
Mamastops Report Generators
LiveCustom GPS report generation system for Mamastops logistics operations. In production and actively used internally by the company.
CMC Inventory Management System
Comprehensive inventory management prototype with real-time data synchronisation. Led as Team Software Engineer during development.
Modern Apartment Management System
Full-stack apartment management solution with tenant and property management features.
Zambia Tourist Introduction Site
Interactive tourism platform showcasing Zambian attractions and travel information.
Edutrack School Management System
Comprehensive school management system prototype for educational institutions.
Sulfame Tech
An innovative software development company dedicated to creating cutting-edge solutions for modern businesses.
Innovation First
Leveraging cutting-edge technologies to build solutions that drive business growth and transformation.
Expert Team
Talented developers and engineers passionate about delivering excellence and exceeding expectations.
Fast Delivery
Agile development practices ensuring rapid deployment and continuous improvement of your projects.
Ready to Transform Your Ideas?
Sulfame Tech is launching soon with a mission to deliver innovative software solutions that empower businesses and create lasting impact.
Let's Connect
I'm always interested in hearing about new projects and opportunities.