Full Stack Engineer

Open to full-time

Bio

Abdulqudus A is a Full Stack Engineer with several years of experience in building scalable and secure enterprise systems across the identity, telecom, and government technology sectors. Abdulqudus utilizes Angular and Ionic for front-end development and Node.js/NestJS for backend microservices. He builds secure, high-performing applications with technologies like RabbitMQ and Bull Queue for asynchronous communication, PostgreSQL and MongoDB for database optimization, and Elasticsearch for fast search capabilities. His work also involves CI/CD automation, containerization, and AWS cloud deployment. At Seamfix, Abdulqudus led the development of a remote e-passport system for the Ministry of Foreign Affairs, reducing third-party API calls by 40% through MongoDB caching. He also delivered biometric verification systems for major telcos, achieving over 3 million registrations and enhancing capture success rates in low-connectivity regions by implementing retry/fallback logic. Abdulqudus holds a B.Eng in Electrical & Electronics Engineering from Kwara State University, graduating with First Class Honors. He is best suited for roles that involve technical leadership and the development of robust, scalable software solutions.

Expertise

Node.jsMongoDBGitJavaScriptSQLAngularAWSTypeScriptReact NativeDatabase CachingDocument DatabaseRelational DatabaseHTMLKafkaKubernetesReact

Video Intro

Assessments

General Coding and Video Assessment

(91/100)

Implement an LRU Cache AlgorithmHard
Find the Length of the Longest Substring Without Repeating Characters. Difficulty MediumMedium
Average score on Optimize Angular E-commerce Platform Performance copyMedium
Angular's Change Detection Mechanism copyMedium

Projects

Bill Splitting Mobile App

I developed a user-friendly bill splitting app to simplify group payments among friends, families, and teams. Users can create bills, split costs (equally or custom), track payments, and settle balances via Paystack. Built with React Native for smooth cross-platform use and NestJS for secure, scalable APIs. Features include real-time notifications, integrated payments, and seamless syncing of shared expenses. Tech Stack: React Native, NestJS, Paystack, PostgreSQL, JWT

Remote Registration and Identification System

As part of a collaborative team, I helped develop a remote registration and identification platform to streamline the process of identifying nationals living abroad. The system features a user-friendly interface for individuals to securely submit their details and documents remotely, along with a web-based back office admin portal for efficient verification and management of registrations. This project modernizes the identification process, providing convenience for users and enhancing operational efficiency for administrators.

Experience

Senior Software Engineer
SEAMFIXJan 2025 — Oct 2025
- Built a fully remote e-passport system for the country's Ministry of Foreign Affairs, enabling diaspora citizens to apply and receive passports without visiting embassies or offices.
- Implemented AI-powered identity assurance with facial recognition, liveness detection, and similarity scoring against official records.
- Reduced third-party API calls by 40% through MongoDB-powered caching and structured API interaction logs, significantly lowering operational costs and redundant calls.
- Integrated OpenTelemetry, cutting debugging and issue resolution time by 40% across services.
- Boosted PostgreSQL performance by 35% via indexing and query optimization.
- Built scalable microservices using TypeScript, NestJS, and messaging queues (RabbitMQ, Bull Queue) for communication.
NodeJs, NestJs, Ionic, Angular, Redis, RabbitMQ, AWS, MongoDB, PostgreSQL, Docker, Git.
Software Engineer III
SEAMFIXJan 2024 — Jan 2025
- Delivered biometric verification systems for major telcos (MTN Nigeria, MTN Liberia, MTN Ivory Coast, GLO) and national ID projects across Africa.
- Built multi-step biometric and SIM registration system with over 1 million subscribers and 3 million registrations with retry/fallback logic, boosting capture success rate in low-connectivity regions.
- Integrated with national identity databases, ensuring compliance with data privacy regulations.
- Designed a retry system with RabbitMQ/Bull Queue, reducing downtime of SIM registration services by 50%.
- Implemented geolocation and geofencing controls to restrict registrations to authorized locations, reducing offsite enrollments by 95% and strengthening compliance.
- Designed AWS S3-based storage for biometric data and documents, enabling secure and cost-effective storage at scale.
TypeScript, NodeJs, NestJs, Ionic, Angular, Redis, RabbitMQ, AWS, MongoDB, PostgreSQL, Docker, Git, ElasticSearch
Software Engineer II
SEAMFIXJan 2022 — Dec 2024
- Spearheaded delivery of a multi-tenant platform for digitizing and verifying academic records for 4 universities in Nigeria.
- Reduced credential issuance turnaround time through workflow automation and a self-service ID verification/payment model, unlocking new B2C monetization channels.
- Implemented JWT-secured APIs with RBAC (Role Based Access Control), safeguarding sensitive endpoints.
React, Express, NodeJS, Outsystems, DynamoDB, AWS Lambda, PostgreSQL, NOsql WorkBench