Available for opportunities

Backend Software Engineer

Crafting scalable architectures and secure APIs with a focus on clean code, system design, and leadership in modern backend development.

Arowosere Abdulkhabeer - Backend Software Engineer

About Me

A passionate engineer focused on building robust, maintainable systems

As a Backend Software Engineer, I specialize in designing and implementing scalable architectures that power modern applications. My approach combines technical expertise with leadership principles to deliver solutions that are both efficient and maintainable.

I'm passionate about clean code practices, security-first development, and mentoring teams to adopt best practices. My experience spans from optimizing high-traffic systems to integrating complex payment gateways with 99.8% uptime.

Currently, I'm focused on architectural thinking, system design patterns, and exploring how to build resilient distributed systems that scale gracefully under load.

System Design
Clean Architecture
Security Best Practices
Team Leadership
Clean Code

Writing maintainable, testable, and scalable code

Architecture

Designing robust system architectures

Security

Implementing secure, compliant solutions

Performance

Optimizing for speed and efficiency

Professional Experience

My journey building and optimizing real-world systems

ScholarGuide Tech

Remote Backend Software Engineer
  • ▹Built and maintained core backend services using Node.js and TypeScript.
  • ▹Designed and enforced role-based access control (RBAC).
  • ▹Improved API performance and responsiveness through query optimization.
  • ▹Optimized MongoDB aggregation pipelines, reducing CPU usage by 40%.

Dala Innovation

Remote Backend Developer (Contract)
  • ▹Developed secure backend access controls for the DalaCare App.
  • ▹Implemented JWT/OAuth authentication flows and middleware-based authorization.
  • ▹Applied core software security principles to mitigate vulnerabilities.

Crude City Global

Backend Software Engineer (Contract)
  • ▹Engineered backend services for an HR management platform.
  • ▹Designed and implemented RESTful APIs and role-based access controls.
  • ▹Modeled relational data and implemented persistence logic using SQL and ORM tools.
  • ▹Implemented complex business rules and validations for HR processes.

InternPulse

Backend Developer (Internship)
  • ▹Developed and maintained backend services using Node.js and JavaScript.
  • ▹Integrated third-party payment APIs to improve transaction reliability.
  • ▹Implemented API logic for concurrent requests and real-time validations.
  • ▹Wrote and maintained unit and integration tests.

Featured Projects

A showcase of my work in building scalable backend systems

In Progress
Agendos
A comprehensive productivity platform featuring task management, reminders, and collaborative workspaces.
Node.js
TypeScript
MySQL
Redis
Real-time Collab
WebSocket
Completed
Demo Credit App
A credit simulation backend built for learning wallet systems, transaction processing, and financial APIs.
Node.js
TypeScript
MySQL
Knex.js
FinTech
Wallet System
Testing
Production
PEDMONIE
Unified payment platform with Stripe integration, processing 5K+ transactions/month with 99.8% uptime.
Node.js
Express.js
MySQL
Stripe API
Payments
High Availability
Completed
Car Dealer API
RESTful API for car dealership management with authentication, inventory tracking, and payment integration.
Node.js
Express.js
TypeScript
MongoDB
JWT
Paystack
Live
Sweetened Cleaning Services
Professional website for UK-based cleaning company with modern design and client inquiry system.
HTML
CSS
JavaScript
SEO
Completed
Library Management System
Digital library backend with book cataloging, borrowing functionality, and role-based access control.
Node.js
TypeScript
Express.js
MongoDB
RBAC
JWT
Completed
Productivity & Life-Management
Full-stack system for realistic planning with streak tracking and real-time task engine.
Node.js
TypeScript
React.js
MySQL
Completed
Node.js Payment Service
RESTful API to parse and execute financial instructions using a defined syntax and rule-driven engine.
Node.js
Express.js
FinTech
Completed
Heuristic Engine API
Backend service for automated threat detection with a risk scoring system for URLs and emails.
Node.js
Security
Algorithms

Technical Expertise

Technologies and tools I use to build robust backend systems

Languages

TypeScript
JavaScript
Java
Node.js
SQL
C#
Bash

Frameworks

Express.js
Next.js
SpringBoot
.NET
ASP.NET

Databases

PostgreSQL
MongoDB
MySQL
Redis
SQLite

DevOps & Tools

Docker
AWS
Azure
Git
CI/CD
Jest
Postman
OpenAPI

Let's Work Together

Have a project in mind? I'm always open to discussing new opportunities and collaborations.