Adonis D. Martin
About Me

I'm Adonis D. Martin

A skilled frontend engineer with a passion for creating visually stunning and user-friendly websites. With a keen eye for detail and a commitment to excellence, I specialize in crafting online experiences that leave a lasting impression. From concept to launch, I collaborate closely with clients to bring their visions to life and ensure their digital presence stands out from the crowd. With my expertise and dedication, I am here to help you elevate your online presence and make a powerful impact in the digital landscape.

My Journey

A few of the teams and products I've helped build along the way

Senior Software Engineering

HealthieFull-time
Aug 2025 - Present

Led frontend architecture across the team — setting standards, conducting code reviews, and mentoring engineers on best practices. Partnered with designers and product managers to translate designs into technical specs and drive implementation of complex features.

Software Engineering

HealthieFull-time
Apr 2024 - Aug 2025

Built responsive React applications with a focus on performance, accessibility, and clean UI. Worked within Agile teams alongside designers and cross-functional stakeholders, translating designs into functional interfaces and driving adoption of modern frontend practices.

Full Stack Web Developer

SimplePracticeFull-time
Oct 2021 - Mar 2024

Built and maintained full-stack web applications across the entire development lifecycle — from responsive front-end interfaces and server-side APIs to database design, testing, and cloud deployment. Collaborated closely with designers and product teams, and contributed to code reviews and engineering best practices.

Junior Lead Instructor

General AssemblyPart-time
Nov 2020 - Oct 2021

Taught and mentored students in front-end development — delivering hands-on lessons covering HTML, CSS, JavaScript, and modern frameworks while developing curriculum materials. Provided individual guidance, assessed student progress, and collaborated with instructors and coordinators to continuously improve the learning experience.

Frontend Web Developer

BopsidyContract
Feb 2020 - Apr 2020

Developed and maintained website content with HTML, CSS, and JavaScript, implementing responsive design and accessibility improvements across browsers.

Tools I Work With

A focused, modern toolkit for building reliable frontends

Languages

TypeScriptJavaScriptHTML5CSSRuby

Frameworks

ReactNext.jsrailsTanStack Start

Styling

SassTailwind CSSCSS Modulesstyled-components

Tooling & Testing

ViteVitestPlaywrightStorybookGitHub Actions

How I Work

The principles behind everything I ship

Accessibility First

I build to WCAG 2.2 AA as a baseline — semantic HTML, ARIA patterns, keyboard navigation, and colour contrast baked in from the start, not bolted on at review.

Performance Obsessed

Every millisecond counts. I profile before I optimise, so improvements are evidence-based — not guesswork — and measurable in real user metrics.

Clear Communication

I write readable PRs, leave useful comments, and flag trade-offs early. Good code ships faster when everyone on the team understands the why behind each decision.

Have a project in mind?

I'm always happy to talk through ideas, scope, and timelines. Let's build something fast, accessible, and built to last.

Contact Me