Jacopo Carta
Full-Stack Engineer · QA
Focused on shipping real products, from SaaS platforms to custom web applications, with a strong QA background. Available for contract, freelance, or full-time roles.
What I use daily
Next.js
TypeScript
PostgreSQL
Tailwind
VercelINTRODUCTION
INTRODUCTION
About
Hi, i'm Jacopo Carta, a full-stack engineer focused on building SaaS platforms and custom web applications with a solid QA background.
I'm currently building WTB Market, a full-stack SaaS platform for sneaker and trading card resellers. Check below if you want to know more about it.
Featured Project
Designed and built the entire platform from scratch — backend architecture, REST APIs, data models, and frontend. Reached 1,700+ paying users across Europe, handling 240k+ unique visitors and 400k+ requests/month, contributing to a business at ~€10k MRR.
WTB Market
2022 - nowFull-stack Developer
- Built and maintain the full-stack architecture — backend, REST APIs, data models and frontend.
- 240k+ unique visitors and 800k+ page views annually, handling 400k+ requests per month.
- 1,700+ paying users across Europe, contributing to ~€10k monthly recurring revenue.
Applause
2025 - nowFreelance QA Engineer
Working on structured test cycles for international products across web and mobile environments. Responsible for test case design, full regression coverage, bug reporting via Jira and direct communication with product teams in Agile workflows.
uTest
2023 - 2025Freelance QA Tester / Test Lead
Two years on uTest's crowdsourced testing platform, progressing to Test Lead across multiple cycles. Covered manual, regression and payment flow testing across 400+ products and 2,000+ test cases. Handled bug triage, tester coordination and end-of-cycle reporting — finishing in the top 2% of the platform.
Discord Bot Developer
2020 - 2022Node.js Developer
- Built and maintained custom Discord bots for sneaker communities.
- Developed scraping and monitoring tools for tracking stock on popular platforms.
- Automated workflows and notifications via Discord integrations.
PROJECTS
PROJECTS
HOW I WORK
HOW I WORK
Spec & Architecture
Define requirements, design data models and plan the stack before writing a single line of code.
Frontend
Build the UI with accessibility, performance and Core Web Vitals in mind from day one — not as an afterthought.
Backend & APIs
REST APIs, authentication, business logic and data pipelines. Designed to be maintainable and easy to extend.
Testing & QA
Manual end-to-end coverage, API testing with Postman, regression cycles. The QA background means bugs get caught before users do.
Deploy & Infra
Self-hosted on VPS with Caddy, or deployed to Vercel. Separate prod and dev environments, DNS, SSL — handled.
Monitor & Iterate
Analytics, error tracking and real user feedback drive what gets worked on next. Shipping is the start, not the finish.
TECH & SKILLS
TECH & SKILLS
Favorite technologies
- Next.JS
React- TypeScript
- Tailwind CSS
Express
MongoDB- PostgreSQL
Prisma
- Vercel
Cloudflare
Caddy
Postman
Jest
Playwright
QA Background
Most of my QA work has been done through manual and regression testing on uTest and Applause across hundreds of products and test cycles in real-world environments.
On my own projects I use Postman for API testing and manual end-to-end coverage. Currently expanding into automated testing with Jest for unit and integration tests and Playwright for end-to-end automation.
Skills
Everything I know comes from shipping real products — not side projects that live on localhost. That changes what you care about.
LET'S GET IN TOUCH
LET'S GET IN TOUCH
Location
Liguria, Italy.