CH.
Bucharest, Romania

Cosmin
Halpern

QA Automation Engineer & SaaS Builder

I break things professionally and build them obsessively.

Available for Freelance — March 2026
See My WorkLet's Talk

// about me

QA engineer by day,
indie hacker by night.

I'm Cosmin — a freelance QA Automation Engineer with 10 years of experience across enterprise software, AAA gaming, and retail tech. During the day I design test frameworks, break APIs, and make sure releases don't catch fire. After hours, I ship SaaS tools and AI-powered products.

My QA career spans companies like Electronic Arts, Ubisoft, METRO, and Tremend — building automation frameworks from the ground up and embedding quality into delivery pipelines.

Based in Bucharest, Romania. Currently focused on SaaS products and AI-powered tools — combining a decade of engineering discipline with the Anthropic API, Next.js, and Supabase to build things people actually pay for.

$ current_focus = ["SaaS products", "AI tools", "QA consulting"]

QA & Testing

JavaSeleniumRestAssuredTestNGAPI Testing

Frontend

ReactNext.jsTypeScriptTailwind CSS

Backend & Data

SupabasePostgreSQLPythonFlask

AI & Integrations

Anthropic APIFirecrawlStripeResend

// experience

10 Years in QA

From game testing at EA and Ubisoft to building enterprise automation frameworks at METRO — a decade of breaking software intentionally.

IDS Consulting

Current

QA Automation Engineer

Aug 2024 — Present
  • —Design and develop automated test suites using Java and Selenium for enterprise web platforms
  • —Measure system performance on multi-user platforms through automated test scenarios
  • —Work directly with developers, product owners, and business analysts across the full delivery cycle
  • —Identify and troubleshoot both front-end and back-end issues using automated tests
JavaSeleniumCucumberCI/CD

METRO.digital

QA Automation Engineer

Dec 2020 — Aug 2024
  • —Created and maintained automation frameworks for large-scale retail digital platforms
  • —Designed automated test suites covering new releases and system maintenance quality
  • —Improved software engineering KPIs through test automation strategy and reporting
  • —Collaborated with cross-functional teams including developers, POs, and business analysts
JavaSeleniumCucumberJiraTestNG

exense GmbH

QA Automation Engineer

Jun 2022 — May 2024
  • —Built and maintained testing frameworks using Selenium WebDriver, Cypress, and RestAssured
  • —Developed automated API and UI tests in Java and JavaScript
  • —Managed test cases and suites using Zephyr; bug tracking via GitHub Issues
  • —Collaborated with developers on test case design covering edge cases and integrations
SeleniumCypressRestAssuredPostmanJavaJavaScript

Tremend Software Consulting

QA Engineer

Oct 2021 — May 2022
  • —Automated tests using Selenium WebDriver, RestAssured, Appium, and Postman
  • —Built and maintained testing frameworks with TestNG and JUnit
  • —Managed CI/CD pipelines for automated testing using Jenkins and Bamboo
  • —Documented best practices and QA processes in Confluence
SeleniumAppiumRestAssuredJenkinsTestNG

METRO SYSTEMS Romania

QA Automation Engineer

Jan 2019 — Dec 2020
  • —Created and executed automated tests using Selenium WebDriver, RestAssured, and Postman
  • —Maintained testing frameworks with TestNG/JUnit for scalability and efficiency
  • —Managed test cases with Zephyr/TestRail; regression testing via Jenkins
  • —Contributed to version control and deployment processes using Git
SeleniumRestAssuredTestNGJenkinsGit

Tremend Software Consulting

QA Engineer

Oct 2017 — Dec 2018
  • —Performed automated testing with Selenium WebDriver and Java
  • —Built mobile automated tests with Appium integrated with BrowserStack
  • —Conducted regression, scripted, and ad-hoc testing with daily client syncs
SeleniumJavaAppiumBrowserStackMaven

Ubisoft

QA Tester

Apr 2017 — Oct 2017
  • —Functional testing on AAA game titles following company quality standards
  • —Scripted, regression, and ad-hoc testing in fast-paced release cycles
JiraTestRailConfluence

Amber

QA Tester

Jun 2016 — Apr 2017
  • —Mobile game testing across iOS and Android in short and long development cycles
  • —Certification testing for iOS App Store and Google Play
  • —Bug identification, isolation, regression, and reporting
JiraTestRailAndroid SDKiOS

Electronic Arts (EA)

QA Tester

Jun 2015 — Jun 2016
  • —Functional testing on console titles including Star Wars: Battlefront and FIFA 17
  • —Live monitoring, regression, scripted and free testing across release milestones
  • —Mentored new team members on QA standards and workflows
TestRailJiraDevTest

// portfolio

Things I've Built

TrackmyRival

Competitor intelligence SaaS that monitors competitor websites, pricing pages, and job postings. Automated tracking with a credits-based model.

Next.jsSupabaseAnthropic APIFirecrawl

Invoysr

Invoice capture and organization tool built specifically for Romanian freelancers and PFA entities. Subscription-based with automated parsing.

Next.jsSupabaseStripeTypeScript

Trovaly

AI-powered influencer discovery platform that helps brands find and connect with the right creators for their campaigns.

Next.jsAISupabaseTypeScript

Rovo Agent (Atlassian)

AI agent that audits Jira story quality using predefined criteria and automatically posts quality scores as comments on each story.

Atlassian ForgeAnthropic APIJira APINode.js

WhatsApp Learning Coach Bot

Automated coaching bot for tracking self-learning progress. Sends scheduled prompts, collects responses, and generates weekly progress reports.

FlaskAnthropic APIAPSchedulerWhatsApp API

Oana Otilia Candles

E-commerce website for a handcrafted candle brand. Clean, elegant storefront built to showcase artisan products and drive online sales.

ReactTypeScriptVite

Corsican Metalworks

Modern web presence for a metalworks business — responsive design, clean UI, and a streamlined admin interface. Live at corsican.ro.

ReactTypeScriptVite

// what i'm building

SaaS Spotlight

Products I've shipped and am actively developing. Real code, real users.

Live Product

TrackmyRival

AI-powered competitor intelligence for SaaS teams

Monitor competitor websites, pricing pages, and job postings automatically. Stay ahead without manual research.

Next.jsSupabaseAnthropic APIFirecrawl
Check it out
Live Product

Invoysr

Invoice capture & organization for Romanian freelancers

Built for PFA entities — capture, sort, and track invoices effortlessly. Stop losing documents at tax time.

Next.jsSupabaseStripe
Check it out
Client Project

Corsican Metalworks

Modern web presence for a metalworks business

React + TypeScript + Vite client website with responsive design and a clean admin interface. Built and delivered for corsican.ro.

ReactTypeScriptVite
Visit Site

// services

What I Do

Three distinct skill sets. One engineer who can do all three.

QA Automation

End-to-end test automation frameworks, API testing, and CI/CD integration. I use Java, Selenium, and RestAssured to build reliable, scalable test suites that catch regressions before your users do.

JavaSeleniumRestAssuredTestNGAPI TestingCI/CD

Full-Stack Development

From landing pages to full SaaS products. I build with Next.js, Supabase, and Stripe to ship fast, scalable web applications with proper auth, payments, and database architecture.

Next.jsTypeScriptSupabaseStripePostgreSQLReact

AI Engineering

Integrating AI into real products — not demos. I work with the Anthropic API to build agents, automated pipelines, and LLM-powered features that genuinely improve user workflows.

Anthropic APILLM AgentsFirecrawlPythonAI Pipelines
Work With Me

// writing

From the Blog

All posts