David Amaku — Senior Full Stack Developer

Professional Summary

Senior Full Stack Developer with 5+ years delivering production-grade software across fintech, SaaS, geospatial, and mobile platforms. Experienced in Agile cross-functional teams, microservices architecture, and end-to-end product delivery — from system design to deployment. Led a monolith-to-microservices migration that increased deployment frequency by 400%, built systems serving 11,000+ active users, and maintained 85% automated test coverage throughout. Adept at technical discovery, solution design, legacy modernisation, and mentoring teams toward quality engineering practices. Committed to user-centric digital services built to last in production.

Technical Skills

Backend Node.js, NestJS, Express.js, Python, Golang, TypeScript, REST APIs, GraphQL, WebSockets Frontend Next.js, React, Flutter (web & mobile), SwiftUI Databases PostgreSQL, MongoDB, Redis — schema design, query optimisation, migrations DevOps / CI/CD Docker, Kubernetes, Terraform, GitHub Actions, AWS (EC2, S3, CloudWatch, IAM, ElastiCache) Testing Jest, unit testing, integration testing, E2E testing, TDD — 85% coverage achieved in production codebase Architecture Microservices, event-driven SOA, distributed systems, design patterns, DDD Collaboration Git (5+ years), Agile/Scrum, code review, technical documentation, cross-functional delivery

Work Experience

Senior Software Engineer — Backend

Getpayed Technology Solutions

Sep 2025 – Present

Built and maintained POS terminal management system integrated with Sterling Payment API.
Designed automated payment workflow processing for high-frequency transaction handling.
Collaborated in agile cross-functional delivery teams; contributed to sprint planning, peer code review, and documentation.

Node.jsTypeScriptPostgreSQLREST APIsGit

Senior Software Engineer — Backend

Bank With Zelia

Apr 2024 – Present

Architected microservices backend for digital banking, covering payment processing, account management, and transaction history.
Designed REST APIs consumed by mobile banking clients with a focus on performance, reliability, and security.
Contributed to integration test suites covering core payment flows; maintained service documentation for maintainability.

NestJSNode.jsPostgreSQLRedisDockerGit

Senior Backend Engineer (Contract)

Aadun Realty

Mar 2025 – Jul 2025

Delivered a blockchain-based real estate tokenisation platform from discovery through production launch.
Designed and documented 200+ API endpoints; led technical discovery and produced system architecture artefacts.
Sole technical lead — owned solution design, code quality, and deployment pipeline.

Node.jsTypeScriptMongoDBAWSBlockchainGit

Lead Engineer → Lead Backend Engineer → Software Engineer

Zap Technologies Ltd

Mar 2023 – Feb 2025

Led monolith-to-microservices migration of a live cryptocurrency exchange — 400% improvement in deployment frequency, zero data loss.
Architected multi-chain wallet system supporting 6 blockchains; sustained 99.9% uptime for 11,000+ active users.
Reduced API response times by 70% through profiling, caching strategy (Redis), and query optimisation.
Built and maintained automated CI/CD pipelines using Docker and Kubernetes; enforced 85% test coverage with Jest (unit, integration, E2E).
Managed $100K+ monthly transaction volume; resolved 20+ security vulnerabilities via VAPT process.
Led a team of 10+ engineers; mentored 5 junior developers to mid-level through pair programming and structured reviews.

NestJSNode.jsTypeScriptMongoDBPostgreSQLRedisDockerKubernetesTerraformAWSJestGit

Software Engineer — Blockchain

Solarsoft Technologies

Aug 2021 – Nov 2022

Developed Solidity smart contracts and decentralised applications (DApps) integrated with web frontends.
Participated in Agile sprint ceremonies, peer code review, and ongoing technical documentation.
Contributed to integration and unit test coverage for smart contract interactions.

SolidityJavaScriptNode.jsWeb3.jsEthers.jsGit

Founder & Lead Engineer

Amaku Solutions

2021 – Present

Designed, built, and shipped 8+ digital products across geospatial, fintech, HR/payroll, mobile gaming, and operations management.
Full end-to-end ownership on every product: requirements, system architecture, backend, frontend, CI/CD, App Store release.
Delivered CORSLocate (geospatial SaaS), a multi-tenant Payroll platform, Tracc (crypto analytics), and Pots & Pans (real-time multiplayer mobile game).

FlutterNext.jsNestJSNode.jsGoSwiftPostgreSQLMongoDBRedisAWS

Selected Projects

Zap Crypto Exchange Platform

Fintech · Web3 · 2023–2025

Multi-chain cryptocurrency exchange supporting 6 blockchains with non-custodial wallets. Scaled from zero to 11,000+ active users. 400% deployment improvement, 70% API latency reduction, 99.9% uptime, $100K+ monthly volume.

NestJSMongoDBRedisKubernetesTerraform

Payroll Management SaaS

HR & Finance · 2025–Present

Multi-tenant payroll platform for educational institutions. Handles salary computation, progressive tax, loan processing, payslip generation, and financial reporting with role-based access control.

NestJSNext.jsPostgreSQLPDFKit

CORSLocate

Geospatial · SaaS · 2024–Present

Marketplace for land surveyors to discover and subscribe to CORS/GNSS correction services across Nigeria. Replaces weeks of manual coordination with a 5-minute digital workflow. Paystack-integrated subscription model.

FlutterNext.jsNode.jsMapboxPaystack

go-with-me / infra-hub-tf

Open Source · Infrastructure

Open-source production-ready Go boilerplate for backend services, and a multi-environment Terraform infrastructure module with security hardening — used as a foundation across personal and client projects.

GoTerraformAWSDocker

Qualifications Matrix — JL13 / GoA Requirements

Requirement	Expected	Where to Find in This CV
Source control (Git) in collaborative development	5 yrs	All roles, 2021–present (5+ years)
Automated unit testing & integration testing	3 yrs	Zap Technologies (2023–2025): Jest, TDD, 85% coverage; Bank With Zelia (2024–present)
Relational & non-relational database technologies	3 yrs	All roles: PostgreSQL, MongoDB, Redis (2021–present)
Full Stack on complex agile software solutions	5 yrs	Zap, Bank With Zelia, Getpayed, Amaku Solutions (2021–present)
Production apps with modern application & JS frameworks	3 yrs	NestJS, Express, Next.js, Flutter — Zap, Bank With Zelia, Amaku Solutions (2022–present)
Legacy system transformation to modern digital services	3 yrs	Zap Technologies: monolith-to-microservices migration (2023–2024)
Frontend: React / Vue / Angular; Backend: Node.js (NestJS, Express), Python	2 yrs	NestJS, Express, Node.js throughout; Next.js/React: Amaku Solutions, Aadun Realty; Python: multiple projects
Design patterns & software architecture	2 yrs	Microservices, event-driven SOA, DDD — Zap Technologies & Amaku Solutions (2021–present)
CI/CD pipelines	2 yrs	Zap Technologies: Docker, Kubernetes, Terraform, GitHub Actions (2023–2025)
Cross-functional team collaboration & UX-aware delivery	2 yrs	All employment roles; end-to-end product ownership at Amaku Solutions including UX to deployment