Hello, I'm
Olusegun Emmanuel
Full-Stack Engineer with DevOps experience — building scalable web and mobile applications, working with production infrastructure, and leading engineering teams.
Engineering Software That Scales
I'm a Full-Stack with 5+ years of experience building scalable web and mobile applications, designing backend systems, and managing production infrastructure from development to deployment.
I lead engineering teams across backend, frontend, mobile, and DevOps, driving architecture, development workflows, CI/CD, and reliable software delivery.
I work closely with Product, Design, QA, and cross-functional teams to turn ideas and Figma designs into secure, scalable, production-ready products. My core stack includes FastAPI, React, Next.js, React Native, PostgreSQL, Docker, AWS, and modern CI/CD practices.
Technologies I Work With
A comprehensive toolkit spanning backend, frontend, mobile, DevOps, and infrastructure.
Backend Development
Frontend & Mobile
Databases & Messaging
DevOps & Infrastructure
Security & Compliance
No Code & SEO
Projects I've Shipped
Production applications spanning real estate, fintech, ride-hailing, social networking, and enterprise systems.
Also built & maintain:
My Journey
From entry-level developer to Software Manager — a story of consistent delivery, technical leadership, and growth.
Software Engineer
Poietes· Remote
- Design and build full-stack features end-to-end — from API design and database modelling to frontend integration and production deployment
- Develop and maintain RESTful APIs and microservices using FastAPI and Node.js, with PostgreSQL and Redis for data and caching layers
- Implement CI/CD pipelines, containerise services with Docker, and manage production environments on Linux VPS with Nginx and SSL
- Build responsive, performant frontends with React and Next.js, translating Figma designs into pixel-perfect, accessible interfaces
- Conduct code reviews, write technical documentation, and contribute to engineering best practices in a fully remote team
Software Manager
Smash Technology · On-Site
- Lead engineering teams across backend, frontend, mobile, and DevOps operations
- Manage product development workflows from planning through to production deployment
- Oversee scalable system architecture and engineering implementation for 13+ production applications
- Collaborate with Product Managers, Designers, QA teams, and stakeholders to deliver scalable products
Lead Software Engineer
Smash Technology · On-Site
- Built and maintained backend systems using FastAPI and Flask, frontend apps with React.js and Next.js
- Managed mobile application development using React Native with Google Play Store deployments
- Implemented CI/CD pipelines, configured Docker containers, Nginx servers, and Linux infrastructure
- Conducted code reviews, developer mentorship, and engineering process improvements
Software Engineer Intern
HNG Nigeria · Remote
- Developed AI-powered video and audio summarization systems with cross-functional teams
- Built and maintained backend APIs, integrated Google OAuth and third-party authentication
- Improved backend reliability, maintainability, and performance in agile sprints
Backend Developer
Epistimis · USA (Remote)
- Maintained and optimized backend systems and APIs for scalability
- Refactored codebases and improved documentation and collaboration processes
- Facilitated engineering standups and assisted with software release planning
Software Engineer Intern
ALX Africa — The Room Fellowship · Kenya (Remote)
- Designed and implemented RESTful APIs for real estate platforms
- Deployed and monitored production services with debugging and testing
- Participated in pull request reviews, engineering planning, and agile workflows
ICT Department
National Lottery Regulatory Commission · Abuja, Nigeria
- Managed and monitored network infrastructure and data center operations
- Troubleshot server, network, and hardware issues for enterprise systems
- Maintained availability and security of IT infrastructure
Let's Build Something Together
Have a project in mind?
I'm always open to discussing new projects, technical leadership roles, or opportunities to build impactful software. Whether it's a full-stack application, mobile app, API architecture, or DevOps infrastructure — let's talk.