Backend Engineer · PsychSpace
Architected two interoperating backends — NestJS/MongoDB product API and Django/PostgreSQL scoring engine — linked by RS256 service JWTs. Built psychometric scoring, RBAC, S3 uploads, and Swagger docs.
About
Backend engineer
building scalable,
secure systems
I'm Fredrick — based in Abuja, Nigeria. I design server-side architectures, REST APIs, database optimization, and auth systems. Core stack: Node.js, Express, NestJS, MongoDB, PostgreSQL, and FastAPI, with React when frontend integration is needed. Experienced leading engineering teams through delivery.
Skills
What I work with
Languages
- JavaScript
- TypeScript
- Python
Backend & Frameworks
- Node.js
- Express.js
- NestJS
- FastAPI
- Django
- Socket.io
Databases
- PostgreSQL
- MongoDB
- MySQL
- Knex.js
- Database Design
Architecture & Systems
- Microservices
- System Design
- JWT / RBAC
- gRPC
- Auth Systems
DevOps & Cloud
- AWS
- DigitalOcean
- CI/CD
- Git
- GitHub
Frontend
- React.js
- HTML
- CSS
- Tailwind CSS
Experience
Where I've built
Backend Engineer · Engineering Team Lead · Claymore Limited
Led sprint planning, reviews, and architecture for Stakeholders Connect. REST APIs, Socket.io chat/notifications, JWT/RBAC, MongoDB optimization, and AWS CI/CD with Joi validation.
Backend Developer (Intern) · TechVibes Ltd
Swift Ride platform — ride/fare APIs with Google Maps/Mapbox, WebSocket driver tracking, MFA (SMS/email/authenticator), and Cloudinary batch image processing.
Backend Developer · SustainaFinance DataNexus
ESG and financial data pipelines — ingest, harmonize, and validate multi-source metrics with real-time calculation logic and governance controls.
Backend Developer · Padding Technologies
Evolution and Officing backends on Node.js, Express, and PostgreSQL — schema design, complex SQL, tests, and cross-functional delivery.
Backend Developer (Intern) · HNG Tech
Screen-recording Chrome extension backend; contributed auth and payment microservices for a large e-commerce platform.
Full-Stack Developer (Intern) · Elatech Limited
Weather app with third-party APIs and a Paystack clone covering core payment workflows with live Paystack integration.
Education
BSc, Computer Science
Coursework in Algorithms & Data Structures, Database Systems, and Software Engineering.
Approach
How I work
01
Design for failure
Retries, timeouts, and clear ownership when a dependency drops.
02
Make contracts explicit
APIs and events that other services can depend on without guesswork.
03
Measure before guessing
Logs, metrics, and query plans beat intuition when latency slips.