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Thiago[ Martins ]

Fullstack Developer · Argentina

I build web products that turn ideas into measurable results.

Hi, I'm Thiago Martins. I partner with teams that need to validate, scale, or reimagine their platforms. I stay involved from strategy to implementation to secure dependable launches and sustained growth.

  • I combine discovery, technical design, and continuous delivery to launch products with less friction.
  • I turn complex requirements into clear experiences that prioritize conversion and accessibility.
  • I work with startups and remote teams across LATAM and Europe, adapting to their pace and tooling.
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How I can help
Discovery & MVPseCommerce scalingInternal systems & dashboards

Book a free discovery call and let's define the next step for your product.

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About me

I'm a product-driven fullstack developer. I enjoy working side by side with founders, PMs, and designers to turn ambitious ideas into real digital experiences. My approach blends research, storytelling, and technology to create solutions people love to use.

I bring clarity when a project is just starting and discipline when it is time to scale. Thorough documentation, transparent communication, and iterative deliveries keep every stage moving forward with confidence.

Based in Rosario, Argentina, collaborating remotely with teams across LATAM and Europe.
Bilingual (es/en) to ease collaboration with stakeholders and international documentation.
My vision is to build products that blend measurable impact with experiences that tell stories.

Strategy & product

I turn ideas into prioritised roadmaps. I facilitate discovery workshops, define metrics, and align teams so every release has purpose.

Business-centered experiences

I design accessible interfaces, microcopy, and flows that improve conversion. Every feature includes hypotheses and success criteria.

Modern, scalable stack

I work with TypeScript, React, Astro, and Node.js to build maintainable, modular foundations ready to grow with your company.

How I work

Every project is different, but combining strategic discovery, technical design, and short delivery cycles lets us learn faster. Here's the flow we follow together:

  1. 01

    Discovery and alignment

    I map goals, audiences, and constraints. We create a prioritised backlog that balances impact and effort.

  2. 02

    Technical design and prototypes

    I define architecture, data models, and reusable components. We validate the experience with clickable prototypes.

  3. 03

    Iterative delivery and measurement

    We launch in short cycles, measure results, and adjust with real data to sustain steady growth.

Professional experience

I balance studio work, client projects, and mentorship. Each role strengthened my ability to connect business needs with clear technical delivery.

  1. CEO & Fullstack Developer · MaskedBytes

    Boutique studio · eCommerce & marketplaces

    Apr 2024 – Present Remote · Global

    I lead a studio focused on eCommerce and marketplace experiences for startups and scaling brands.

    • I define measurable roadmaps with founders and PMs to launch MVPs in short cycles.
    • I coordinate design, development, and analytics so every release drives business value.

  2. Teaching Assistant · SoyHenry

    Bootcamp · Education

    Dec 2023 – Jul 2024 Remote · Argentina

    I supported new developers through the first stages of an intensive fullstack bootcamp.

    • Led pair programming sessions, code reviews, and weekly workshops for 30+ students.
    • Produced boards and documentation that made cohort-wide async collaboration easier.

  3. Fullstack Developer · KaroKids

    Client project · eCommerce

    Jan 2024 – Mar 2024 Remote · Colombia

    I developed the commerce platform for a kidswear brand alongside the design and marketing teams.

    • Integrated secure checkout, catalog management, and automated email campaigns.
    • Kept mobile load times under 1.5s through asset optimization and CDN strategy.

  4. Fullstack Developer · Ares WebDev

    Freelance · Web applications

    Nov 2023 – Present Remote · Argentina

    I craft custom solutions for entrepreneurs and small businesses that want to strengthen their digital presence.

    • Deliver accessible interfaces and maintainable code tailored to each business.
    • Iterate on tooling and CI/CD pipelines to raise quality with every release.

Want a deeper look at my background?

Download my resume to review detailed outcomes, preferred stacks, and recommendations from the teams I've worked with.

Download resume

My work

I design and build end-to-end digital products. Here is a selection of projects, technologies, and collaboration models that reflect my approach.

Featured projects

A mix of client collaborations and personal projects where I led discovery, architecture, and delivery. Each case shows how I connect business, design, and technology.

The Lyrics Bay Client project

The Lyrics Bay

Social platform where music lovers share and curate lyrics with a personalized feed.

  • Designed a gamified onboarding and real-time collaborative editor so the community keeps the catalog alive.
  • Implemented hybrid rendering and caching that cut initial load time by 35%.
TypescriptReactZustandNodeJSExpressPostgreSQL
View project
MedicShop Client project

MedicShop

Marketplace that streamlines purchasing medical equipment for clinics and practitioners.

  • Built a headless architecture that syncs inventory, pricing, and catalogs across multiple vendors.
  • Integrated payment gateways and automated invoicing to operate across countries without friction.
TypescriptReactReduxNodeJSExpressMongo
View project
KaroKids eCommerce Client project

KaroKids eCommerce

Scalable eCommerce for a Colombian kidswear brand focused on growth and agile catalog updates.

  • Developed an admin panel with publishing workflows and real-time stock reports.
  • Optimized time-to-purchase with static routes and API caching strategies.
JavascriptReactReduxNodeJSExpressSequelizePostgreSQL
View project
Ares GamesDB Personal project

Ares GamesDB

Video game database with filters, favorites, and detailed profiles powered by the RAWG API.

  • Implemented combined filters, pagination, and saved searches to explore over 3,500 games.
  • Designed an accessible dark mode and reusable components that preserve visual consistency.
JavascriptReactReduxNodeJSExpressSequelizePostgreSQL
View project
Personal Portfolio Personal project

Personal Portfolio

Portfolio built with Astro and Tailwind to showcase product thinking and technical delivery.

  • Automated metadata, image optimization, and multi-theme support to boost SEO.
  • Integrated typed content so sections update from a single data module.
TypescriptAstroTailwind
View project
GreenPortal Personal project

GreenPortal

Fan project using the Rick and Morty API to explore characters with playful UI touches.

  • Developed instant filters and virtual pagination to browse over 800 characters.
  • Micro-interactions and skeletons deliver instant feedback on slow connections.
JavascriptReactReduxNodeJSExpressSequelizePostgreSQL
View project
Ares Tac Toe Personal project

Ares Tac Toe

Modern Tic-Tac-Toe with multiplayer support and celebratory animations.

  • Implemented a real-time match engine that validates moves and ties.
  • Designed animations and empty states that keep gameplay snappy and accessible.
HTMLCSSJavaScript
View project
NotesAres Personal project

NotesAres

Lightweight notes app built to capture ideas quickly from any device.

  • Offline-first sync with LocalStorage persistence keeps notes available without connection.
  • Reusable, accessible components create a consistent experience.
HTMLCSSJavaScript
View project

Technologies & tools

This is the foundation I use to build reliable, adaptable products. I pick each piece according to the project context, prioritising maintainability and performance.

Frontend & User Experience

  • HTML
  • CSS
  • JavaScript
  • TypeScript
  • React
  • Next.js
  • Astro
  • Tailwind CSS
  • Redux
  • Zustand

Backend & Data

  • Node.js
  • Express
  • Sequelize
  • PostgreSQL
  • MongoDB

Ways to collaborate

Bring me in for a project, a focused sprint, or as an ongoing partner. These are a few starting points to work together.

Discovery sprint (2 weeks)

Ideal for validating ideas or redefining a product. We build clarity around the problem, measure opportunities, and outline an actionable plan.

  • Kickoff workshop
  • User map & journeys
  • Clickable prototype
  • Prioritised backlog

End-to-end development

We work together from architecture through production launch. Perfect for MVPs or new critical modules.

  • Architecture & stack setup
  • Reusable UI components
  • Integrations with external APIs
  • Deployment pipeline & monitoring

Continuous optimization

Monthly partnership to scale existing features, improve key metrics, and keep a healthy codebase.

  • Initial technical audit
  • Optimization roadmap
  • Iterative implementation
  • Reports with metrics & learnings

Certifications & continuous learning

I stay up to date with training that strengthens my ability to guide teams and make well-founded technical decisions.

Fullstack Developer (Bootcamp)
Fullstack Developer (Bootcamp) SoyHenry · 2024

Intensive 800+ hour bootcamp focused on agile teamwork and building real products.

 Teaching Assistant
Teaching Assistant SoyHenry · 2024

Recognition for mentoring, facilitating student teams, and supporting tech careers.

 State Management with Zustand
State Management with Zustand DevTalles · 2024

Hands-on training to implement scalable state management in modern React apps.

Let's talk about your project

I'm excited to partner with teams that value quality and transparent communication. Whether you need to validate an MVP, optimise an existing platform, or add expert hands to a complex roadmap, I can support you from strategy through delivery.

I suggest short work cycles with clear deliverables, accessible documentation, and shared metrics so everyone involved knows what is next and why.

  • Available for remote collaborations across American and European time zones.
  • Guaranteed response within 24 business hours.
  • We can schedule a free discovery call to review your goals.

Share context, goals, and key dates. I will prepare a proposal with phases, estimates, and the ideal ways of working for your team. Prefer another communication tool (Slack, Notion, ClickUp)? I adapt easily.