STEPHEN TOOMEY

Full-Stack Software Engineer

Lagos, NG.

Overview

About

Work

Education

Languages

Certificates

Skills

Projects

References

About

Highly accomplished Full-Stack Software Engineer specializing in the React and Node.js ecosystem, with a proven track record of independently building, containerizing, and deploying secure, multi-tenant applications in cloud environments. Leverages foundational computer scienc...

Work

Jan 2024 → May 2024 ·

Independent Consulting

Full-Stack Developer

Education

Sep 2021 → May 2025 ·

Computer Science

University of the People

Languages

English

Certificates

Jan 2025·

Advanced Full-Stack Engineering Certification

Independent Engineering Program

Skills

Languages

JavaScript (ES6+), HTML5, CSS3, Node.js, SQL Basics

Frontend

React, Context API, useReducer, React Router, Chart.js, Vite, Responsive Design, Accessibility (WCAG), BEM

Projects

References

Independent Consulting

Full-Stack Developer

Remote, N/A, Global

Jan 2024

→

May 2024

Led full-stack development initiatives, optimizing performance, enhancing security, and streamlining deployment for multi-tenant cloud applications.

Optimized asset-loading latency by 40% across distributed environments through the strategic integration of Cloudinary image pipelines managed via Multer middleware.

Secured multi-tenant architectures by implementing automated, race-condition-safe inventory deductions and integrating a secure Paystack payment gateway for localized Naira transactions.

Reduced client-side re-rendering overhead by 35% in high-density product discovery views by engineering custom useMemo hooks and Flux-pattern state machines (Context API + useReducer).

Mitigated real-time latency bottlenecks on analytical dashboards by building bi-directional WebSocket pipelines with Socket.io and optimizing Chart.js visualization engines.

Enforced 100% user data isolation across production application environments by establishing strict cryptographic token verification routines utilizing stateless JWT and bcrypt hashing algorithms.

Streamlined local-to-cloud delivery cycles by containerizing development services with Docker/Docker Compose and establishing continuous automated integration (CI/CD) paths via GitHub Actions.

Accelerated database query lookups in text-heavy document storage applications by replacing file-based management with scalable, custom server-side MongoDB $regex indexes.

Architected modular UI state management by custom-building reusable hooks abstracting browser Geolocation APIs and third-party RESTful integrations.

Languages

JavaScript (ES6+), HTML5, CSS3, Node.js, SQL Basics.

Frontend

React, Context API, useReducer, React Router, Chart.js, Vite, Responsive Design, Accessibility (WCAG), BEM.

Backend

Node.js, Express.js, REST API Design, MongoDB, Mongoose ODM, JWT Authentication, bcrypt, Socket.io.

Cloud & DevOps

Docker, Docker Compose, GitHub Actions (CI/CD), Vercel, Railway, MongoDB Atlas, Cloudinary.

Tools & Methodologies

Git/GitHub, Postman, Agile/Scrum, Asynchronous Communication, RESTful Architecture.

Testing

Jest, React Testing Library, Vitest.

Computer Science Knowledge

Data Structures (Linked Lists, Stacks, Queues, Hash Maps, Binary Search Trees, Heaps (Priority Queues), Graphs (Adjacency Lists)), Algorithms (BFS, DFS, Dijkstra's Shortest Path, Merge Sort, Quick Sort, Heap Sort, Dynamic Programming (Memoization & Tabulation)), Core Patterns (Recursion, Divide & Conquer, Sliding Window, Two Pointers, Greedy Algorithms), System Applications (Custom caching mechanisms, undo/redo state managers, operational task schedulers, route optimization engines).