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Serge Vinterman

@sergevinterman

Product Engineer at Limitless building prediction-market features end to end and iterating test automation for production releases.

Bulgaria

Message

At Limitless, I ship prediction-market features end to end, from idea and design through code, tests, release, and support. I also fix bugs across the frontend and backend and iterate test automation for production releases.

At Skipr, I built QA from zero, including processes, documentation, dashboards, automation, and team hiring. I tested security for government and enterprise clients and also wrote product features and fixed bugs.

At Turbo Stars and Web33, I organised QA for a microservices platform and built test automation for client projects. I’ve also tested DeFi projects, operated validator and full nodes, and built servers, autotests, wallet checkers, and trading bots.

Experience

Work history, roles, and key accomplishments

Current

Product Engineer

Current

Limitless

Jan 2025 - Present (1 year 10 months)

Ships features end to end, fixes bugs across frontend and backend, and works daily with AI tools. Also handles manual and automated testing for a custom trading core.

AI Testing Frontend Backend CLOB AMM RFQ Parlay Testing Automation

QA & AQA Lead

Skipr

Jan 2024 - Jan 2025 (1 year)

Built QA from zero including process, docs, dashboards, automation, and team hiring. Implemented E2E automation for web, mobile, API, and load testing, and handled security testing for government and enterprise clients.

Playwright Appium TypeScript Axios Artillery GitHub Actions LambdaTest NodeJS Flutter VPN SAST

Senior QA & AQA Engineer

Turbo Stars

Jan 2022 - Jan 2024 (2 years)

Organized QA on a microservices platform with dense math logic. Built UI and API test frameworks, performed load testing, and created Jira productivity dashboards. Onboarded and mentored two QA engineers.

Playwright TypeScript Axios Chai GitLab CI CD Postman Swagger Jira

AQA Engineer

Web33

Jan 2020 - Jan 2022 (2 years)

Built test automation from scratch for 15+ client projects, including web and mobile suites for DeFi apps. Implemented load and stress testing, and set up a self-hosted test pipeline with Kubernetes.

Selenium Appium Gatling Artillery Jenkins Docker Helm ArgoCD Kubernetes Prometheus Grafana

Builder, Node Operator, Tester

Crypto Projects

Jan 2019 - Jan 2021 (2 years)

Performed testnet bug hunting and reports for early-stage projects, ran validator and full nodes, and built and ran own servers. Wrote autotests and trading bots for various exchanges.

Testnets Network Operations Testing Automation Trading Bots SPOT Futures Copy Trading