hi, i'm bruna szarin 👋🏻

a fullstack software engineer.

I build things for the web (and pet cats)

some of the brands I've already worked with

about me

nice to meet you.

I'm a frontend-focused Fullstack Developer with expertise in React, Next.js, TypeScript, JavaScript, HTML, CSS, Tailwind and Sass.

Experienced in developing and integrating solutions across insurance systems, e-commerce ecosystems and logistics ERPs, handling complex business rules and data-driven applications. Solid backend experience with Node, Python, C# and Java, working with REST and GraphQL APIs.

Proficient with Git (GitHub, GitLab), testing (Jest, React Testing Library), and Agile methodologies (Scrum, Kanban). Focused on performance, scalability, maintainability and clean code.

my journey

some places I've been.

expert in ecommerce

shopify development.

10+ years building fast, conversion-focused Shopify storefronts for brands across different industries.

theme development

Liquid, at the core of every store I build.

Over 10 years working with Shopify's templating language — building fast, maintainable themes from scratch or customizing existing ones to fit exactly what a brand needs.

online store 2.0

Sections, blocks, and merchant-friendly themes.

JSON templates, sections and blocks, Metafields and Metaobjects — building storefronts merchants can actually customize themselves, without touching code.

checkout extensibility

The last step of the purchase, done right.

Custom checkout experiences and A/B-tested improvements to reduce drop-off — every friction point removed between "add to cart" and "order confirmed."

payments & shipping

Integrating the tools that make a sale real.

Payment gateway and shipping provider integrations — connecting storefronts to the infrastructure that actually gets products to customers.

app development

Custom apps that extend what Shopify can do.

Building and integrating Shopify apps — connecting stores to ERPs, marketing platforms, and whatever custom tooling a business needs.

storefront & admin api

GraphQL, REST, and webhooks that just work.

I've implemented GA4, Google Tag Manager, Meta Pixel, and the Facebook Conversions API — configuring purchase, add-to-cart, and checkout events with accurate attribution.

performance

Fast stores convert. I make sure they're fast.

Lighthouse, PageSpeed Insights, Core Web Vitals, Microsoft Clarity, and Hotjar — monitoring performance and user behavior to find bottlenecks across the whole customer journey.

industries

Different industries, the same care for detail.

DTC fashion, health & wellness, InsurTech, FinTech, SaaS, and logistics — building customer-facing web applications and scalable frontend solutions across very different businesses.

a peek behind the scenes