Oluwaseyi Edward SegunProduct engineer
Senior Python / Django / Flutter engineer
I design, build, deploy, and support serious digital products: management platforms, operational dashboards, APIs, commerce systems, mobile apps, payments, and connected infrastructure.
Engineering with business context
I build backend-heavy web and mobile systems for businesses that need reliable software, not experiments.
I am a Python/Django full-stack engineer with 10+ years of experience designing management systems, internal tools, dashboards, admin platforms, e-commerce workflows, and operational software that teams depend on every day.
My strength is speed with structure. I move quickly from idea to production, but I care just as much about clean architecture, maintainable code, documentation, deployment, and long-term stability.
I am comfortable owning the full technical path: database design, backend architecture, APIs, real-time workflows, background jobs, integrations, server setup, monitoring, and production support.
Download full CVCase studies
These are products with moving parts: users, staff, money, data, infrastructure, and workflows that have to cooperate every day.
Senior engineering, without the theatre
I can join for a focused architecture engagement, own a complete build, or stay close after launch to keep the system healthy.
Django and Python backends, database design, REST APIs, permissions, background jobs, and production-ready system foundations.
Customer and staff mobile apps that connect cleanly to Django APIs, payments, notifications, localization, and operational workflows.
Commerce flows, inventory, wallets, billing, Paystack, OPay, Monnify, multi-currency support, and practical sales operations.
Linux/VPS setup, Nginx, Daphne, Supervisord, PgBouncer, Redis, Celery, monitoring, and long-term production support.
Turning loose business problems into structured software: smoother operations, better reporting, reduced manual work, and clearer delivery.
Operational management platforms, executive dashboards, admin tools, reporting modules, CRM, inventory, and interfaces teams can run the business from every day.
A calm, visible process
No mysterious black box. Decisions, risks, tradeoffs, and progress stay legible from the first conversation through production.
Clarify the users, workflows, constraints, failure modes, and business outcome.
Shape the data, APIs, permissions, integrations, and deployment path.
Ship useful increments with clean implementation and direct feedback loops.
Launch with monitoring, background jobs, documentation, and operational confidence.
Keep it stable, improve what matters, and evolve it with the business.
A decade of shipping
Retained to provide ongoing backend and IT support, helping maintain internal systems, resolve technical issues, and support in-house IT operations.
Focus areas include backend reliability, infrastructure support, troubleshooting, and keeping key technical workflows running smoothly.
Building product and software platforms for renewable energy operations across solar mobility, mini-grid operations, customer management, payments, IoT control, analytics, and admin workflows.
Lead development across the Cajin Solar Flutter app, Django backend systems, and web-admin tools used by customers, field teams, station operators, affiliates, and internal staff.
Tech: Flutter, Dart, Django, Python, DRF, PostgreSQL, Celery, Redis, Firebase Cloud Messaging, Paystack, OPay, Monnify, Shelly IoT, and REST APIs.
Lead the company's IT function and a team of three developers, overseeing software development, infrastructure, internal systems, and day-to-day technology operations.
Design and manage web application architecture, coordinate development tasks, support servers and websites, manage email systems, ISP relationships, internal networking, and business technology stability.
Served as sole backend engineer for a ride-hailing startup, leading backend design, development, deployment, monitoring, and documentation ahead of MVP launch.
Built the backend from scratch with Django, designed scalable REST APIs, managed Linode infrastructure, configured production deployments, and implemented Prometheus/Grafana monitoring.
Led development of a health, beauty, and lifestyle e-commerce ecosystem from the ground up.
Designed backend architecture, database structure, inventory, CRM, logistics workflows, health trackers, pharmacist chat, lab test requests, multi-currency support, VPS deployment, user training, and ongoing improvements.
Tech: Python, Django, Celery, Redis, PostgreSQL, Elasticsearch, TinyMCE, Ubuntu, Nginx, Daphne, Supervisord, and PgBouncer.
Built and maintained a digital operations platform supporting sales tracking, food ordering, arcade operations, wallet functionality, online payments, blogs, bulk SMS, and e-commerce features.
Delivered an arcade automation system using an internet-enabled SPDT relay board to control game stations based on paid play time.
Tech: Python, Django, Channels, Redis, MySQL, TinyMCE, Ubuntu, Nginx, Daphne, and Supervisord.
Developed an e-commerce and billing platform supporting product purchases, prepaid electricity unit transactions, and STS 20-digit token generation.
Built inventory, CRM, reporting, support, FAQs, knowledge base, CMS, multi-currency transactions, deployment, and user training.
Designed and developed a custom e-commerce platform that helped extend physical-store operations into online retail for medical devices and wellness products.
Built product management, online sales, inventory, CMS updates, email marketing, DNS configuration, VPS deployment, and production setup.
Developed an e-commerce platform to modernize online ordering, customer engagement, inventory tracking, and sales operations.
Built product catalogs, sales management, inventory, CRM, reporting, CMS updates, multi-currency transactions, email marketing, DNS, VPS deployment, and custom email server setup with iRedMail.
Human, after all
I care about the texture of the work: clear documentation, thoughtful details, useful tools, and the music that keeps long builds moving.
Notes from the work
Long-form notes are being prepared.
Have a real problem to solve?
Tell me what is changing, what is stuck, or what needs to exist. I’ll reply with useful questions and a sensible next step.