Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

With over seven years of experience as a frontend engineer, I’ve had the privilege of building production applications across a diverse range of industries. Whether your product aims to address a specific problem, I’m confident that I can provide the expertise and solutions you need.…

Ammiel Gyan Yawson

Front-End Developer, Full Stack Developer, Web Developer, +2





With over seven years of experience as a frontend engineer, I’ve had the privilege of building production applications across a diverse range of industries. Whether your product aims to address a specific problem, I’m confident that I can provide the expertise and solutions you need.…

Available to hire

With over seven years of experience as a frontend engineer, I’ve had the privilege of building production applications across a diverse range of industries. Whether your product aims to address a specific problem, I’m confident that I can provide the expertise and solutions you need.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Frontend Developer at Rotate

April 1, 2024 - February 1, 2026

Led the adoption of TanStack Query to resolve stale-data issues, significantly reducing bug reports about data not updating after user actions. Authored end-to-end tests for existing and newly shipped features using Playwright, increasing product reliability and reducing regression risk. Investigated and implemented performance optimizations that reduced page navigation time from around 2 seconds to 0.2 seconds in a Next.js application.

Senior Frontend Developer (Contract) at Frostwork

March 1, 2024 - September 1, 2024

Rebuilt a legacy Next.js application by simplifying bloated business logic and upgrading outdated dependencies, resulting in a more maintainable and performant codebase. Authored end-to-end tests to increase reliability and reduce regression risk. Diagnosed and resolved hard-to-reproduce production bugs while implementing UI performance optimizations to improve responsiveness.

Senior Frontend Developer (Contract) at Effect Studios

December 1, 2022 - March 1, 2024

Delivered dashboards and e-commerce applications using React, Next.js, and TypeScript under tight deadlines with no compromise on code quality. Introduced TanStack Query to improve data fetching performance and consistency across projects. Established JS documentation standards across codebases to improve onboarding and long-term maintainability.

Frontend Developer (Contract) at Enyata

November 1, 2021 - February 1, 2025

Architected and maintained shared component libraries in React, Vue 3, and TypeScript, accelerating feature delivery across multiple teams. Optimized application load time by implementing code-splitting and pruning third-party library usage. Led mentorship of junior developers through code reviews and knowledge-sharing sessions, raising code quality standards across the team.

Full Stack Developer at Freelance

October 1, 2020 - October 1, 2021

Designed and shipped a membership and attendance management application serving 600 members, enabling instant member verification that was previously a manual process. Managed project scoping and task breakdown for frontend and backend implementations, consistently delivering within agreed timelines. Provided and integrated PostgreSQL databases on AWS RDS with Django backends to support production data persistence.

Frontend Developer at Freelance

October 1, 2018 - October 1, 2020

Designed and developed user interfaces for multiple institutions, optimizing each to enhance user experience. Shipped 5 marketing websites that automated client-facing communications, reducing the need for manual intervention and unblocking conversions. Developed fully responsive websites ensuring compatibility across a wide range of devices using HTML, CSS, JavaScript, and React.