Portfolio
This portfolio is where you can learn more about me, explore the projects I've built, and find the best ways to reach me.
Full Stack Engineer
Open to part-time
Bio
Desmond Opoku Mends is a software engineer with early-career experience across backend systems, mobile applications, and web tooling. He works with Java, React Native, TypeScript, Python, and Playwright, building and maintaining applications within a monorepo architecture, developing cross-platform mobile apps, and creating browser extensions. His project work also includes backend web development with Flask and Django, and he applies end-to-end testing practices using Playwright and JUnit to verify application reliability. At Turntabl, he maintains and enhances Java-based applications and has contributed to cross-platform mobile development using React Native. Independently, he built CampusClaim, a lost-and-found application for his university featuring image-based search powered by FAISS and CLIP with a progressive web app interface, and Define Me, a Chrome extension for word definitions built with TypeScript and Manifest V3 service workers. He holds a First Class Honors degree in Computer Science and Engineering from the University of Mines and Technology and is an AWS Certified Cloud Practitioner. He is well suited for junior to mid-level roles involving backend development, mobile applications, or web tooling projects.
Expertise
JavaReactReact NativeTypeScriptHTMLCSSPythonFlaskNode.jsMongoDBSQLGoGitAWS
Video Intro
Assessments
General Project Assessment
(81/100)- Great on Find the Length of the Longest Substring Without Repeating CharactersEasy
- Great on Optimize Product Page Load TimeEasy
- Great on Sharing Authenticated User Data Across the AppMedium
Projects
CampusClaim
CampusClaim is a mobile app that helps university students recover lost belongings and return found items to their rightful owners. Losing personal items on a large campus – phones, wallets, ID cards, textbooks, and keys – is common, but there's usually no easy way to report a loss or check if someone found it. CampusClaim solves this by giving students a shared, searchable space to report and reunite lost property. It allows students to post a lost or found item with details like category, location, date, photos, and an optional reward and other students to search for matching items by typing a description or uploading a photo of the item It handles the claiming process, asking the claimant to verify ownership (unique features, where/when it was lost) before connecting them with the person who found it Opens a direct chat between the finder and the claimant to arrange handover Sends push notifications so users know when someone claims their item or messages them Supports quick, familiar sign-in through university credentials or Google, so students don't need to create yet another account from scratch
ITG App
ITG is a web platform that connects job seekers, including people with disabilities, to inclusive employers and gives companies the tools to post jobs and manage applicants. Many capable job seekers, particularly those with disabilities, struggle to find employers who are genuinely set up to hire and support them, while inclusive employers often struggle to reach the right candidates. ITG solves this by creating a dedicated space where job seekers can showcase their skills and needs, and employers can post roles and connect with candidates who are a good fit. It lets job seekers build a profile (skills, resume, disability type, and preferred location) and search for matching jobs. It lets employers create a company profile and post job listings with requirements, salary, and deadlines. It also supports saving jobs and tracking applications from one dashboard, and gives employers tools to review and manage applicants. It includes admin verification for new companies and job seekers to keep the platform trustworthy. It handles self-serve account management — profiles, resumes, logos, passwords. It uses role-based access so each user sees only what's relevant to them.
Experience
Software Engineer
Turntabl· FinTechAug 2025 — Present- Maintained and enhanced Java-based applications within a monorepo architecture, improving system stability and performance.
- Designed and implemented end-to-end testing using Playwright and its MCP’s to simulate critical user workflows and catch regression at the integration level.
- Debugged production issues through structured root-cause analysis, isolating failures across service and data layers.
- Collaborated within agile teams, contributing to sprint planning, stand-ups, and iterative delivery cycles.
- Built and integrated RESTful APIs with attention to error handling, input validation and consistent response contracts
Frontend Engineer
Calabashe· HealthTechOct 2024 — Dec 2024- Built a healthcare booking platform in React, covering provider search, filtering, multi-step appointment scheduling, and a provider review and rating system
- Integrated GetStream.io to build a live video consultation feature, enabling real-time video calls between patients and providers
- Collaborated on end-to-end feature delivery, from UI implementation to third-party API integration, within an iterative development cycle
Developer
Freelance Developer· OtherJan 2024 — Aug 2025- Designed and built a GUI automation system in Python to eliminate repetitive manual workflows, integrating a custom parsing engine to map structured data inputs to domain-specific output codes
- Delivered custom automation solutions for multiple independent clients, reducing manual data-entry time and improving workflow reliability across different business domains
Education
Bachelors in Computer Science and Engineering
University of Mines and TechnologyTarkwa, Ghana2021 — 2025ALX Software Engineering Program
ALXRemote2023 — 2024
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Full Stack Engineer
Accra, Ghana · 0-2 years experience
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