Available for new opportunities

Full-Stack Software Engineer

Disu Oluwatoyin Joseph. I build and ship web applications end-to-end, from user-facing interfaces to backend services and cloud infrastructure. JavaScript, Go, Ruby, and everything in between.

View Work Get in touch

Currently Ziru Technology

Stack JS, TypeScript, Go, Ruby

Experience 4+ years

Domains Fintech, Identity, Hospitality

Location Nigeria, Remote-first

Scroll to explore

About

Full-stack,
front to back

I build web applications end-to-end: user-facing interfaces, backend services, cloud infrastructure, and everything in between. My work spans authentication systems, audit logging, compliance tooling, device intelligence, browser fingerprinting, transaction monitoring, and AI-powered features.

Currently engineering identity and fraud prevention systems at Ziru Technology. Previously I owned the core booking management system at Hotels.ng. I also ship my own products: QRVEST is a full-stack AI-powered SaaS platform I designed and built from scratch.

Based in Nigeria · Remote-first · Open to global opportunities

Technical Skills

React / Next.js

TypeScript

JavaScript ES6+

CSS / SASS

Ruby

AWS / Docker

PostgreSQL / MySQL / MongoDB

RabbitMQ

Experience

Where I've
worked

Companies

Jul 2024 – Present

Ziru Technology

Software Engineer · Remote

Built device fingerprinting system to detect and flag suspicious login attempts, strengthening platform security and reducing unauthorised access risk

Developed adverse media screening module integrating third-party data sources to surface regulatory and reputational risk signals on individuals and entities

Designed a comprehensive audit trail system across the application, enabling full traceability of user actions and supporting compliance reporting

Contributed to core SSO product development enabling seamless single sign-on for enterprise employees across multiple applications

Developed an internal sandbox tool enabling organisations to simulate and test transaction monitoring scenarios before production rollout

Implemented pixel-perfect UI designs from Figma specs, ensuring cross-browser consistency across all apps

JavaScript TypeScript React SSO Device Intelligence Compliance

Nov 2021 – Jun 2024

Hotel Booking Limited

Software Engineer · Hotels.ng · Remote

Hardened application security by implementing token-based authentication and API key management with granular access scopes, reducing attack surface across all public endpoints

Built and delivered approximately 70% of a scalable internal booking management system handling incoming hotel reservations and booking workflows end-to-end

Eliminated N+1 query problems across critical API paths, improving time complexity from O(n2) to O(n) and significantly reducing database load under high traffic

Delivered measurable frontend performance improvements and intuitive UI enhancements, resulting in higher user satisfaction scores and reduced bounce rates

Designed an audit logging solution and built automated data migration scripts supporting a seamless legacy system transition

Created database cleanup and recovery scripts to remove malicious data injections and restore application stability

React REST APIs PostgreSQL Auth Performance

Jan 2021 – Oct 2021

Carril Agency

Software Engineer · Remote

Spearheaded end-to-end development of a SaaS platform for ordering digital services, including a recurring payment solution integrated with third-party payment providers

Containerised the application stack using Docker, ensuring environment parity across development, staging, and production

Optimised backend systems for high-traffic scenarios with a focus on efficient data retrieval, real-time updates, and personalised recommendations

SaaS Payments Docker Backend

Nov 2019 – Dec 2020

Bank of Industry

IT Graduate Trainee · Remote

Collaborated with senior engineers on key software development projects, gaining exposure to enterprise-scale systems and SDLC practices

Enterprise SDLC

Featured Project

Shipped from scratch

01 / Personal Project

QRVEST

AI-powered self-ordering platform for restaurants

Full-stack SaaS platform enabling restaurants and hotels to accept dine-in and online orders via QR code or shareable link. Features an AI menu assistant powered by RAG pipelines and a customer intelligence dashboard for targeted loyalty campaigns.

React Go RabbitMQ AWS RAG / LLM PostgreSQL

Visit qrvest.com →

Contact