Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I’m Oskar Pietka, a Senior Full-Stack Developer focused on building and scaling high-performance web applications and robust APIs. I work across the stack with Python, TypeScript/JavaScript, React, Next.js, Node.js, Express, and both PostgreSQL and MongoDB—especially when reliability and speed matter. Recently, I’ve architected Node.js/Express services handling millions of requests per day with strong p95 latency, and I’ve supported customer-facing platforms and analytics/telemetry that improve engagement and satisfaction. I also enjoy shaping internal engineering frameworks, improving development workflows with testing and performance practices, and collaborating closely with product and engineering teams to deliver secure, maintainable solutions.…I’m Oskar Pietka, a Senior Full-Stack Developer focused on building and scaling high-performance web applications and robust APIs. I work across the stack with Python, TypeScript/JavaScript, React, Next.js, Node.js, Express, and both PostgreSQL and MongoDB—especially when reliability and speed matter. Recently, I’ve architected Node.js/Express services handling millions of requests per day with strong p95 latency, and I’ve supported customer-facing platforms and analytics/telemetry that improve engagement and satisfaction. I also enjoy shaping internal engineering frameworks, improving development workflows with testing and performance practices, and collaborating closely with product and engineering teams to deliver secure, maintainable solutions.

OSKAR PIETKA

Full Stack Developer, Back-End Developer, Web Developer, +2





I’m Oskar Pietka, a Senior Full-Stack Developer focused on building and scaling high-performance web applications and robust APIs. I work across the stack with Python, TypeScript/JavaScript, React, Next.js, Node.js, Express, and both PostgreSQL and MongoDB—especially when reliability and speed matter. Recently, I’ve architected Node.js/Express services handling millions of requests per day with strong p95 latency, and I’ve supported customer-facing platforms and analytics/telemetry that improve engagement and satisfaction. I also enjoy shaping internal engineering frameworks, improving development workflows with testing and performance practices, and collaborating closely with product and engineering teams to deliver secure, maintainable solutions.…I’m Oskar Pietka, a Senior Full-Stack Developer focused on building and scaling high-performance web applications and robust APIs. I work across the stack with Python, TypeScript/JavaScript, React, Next.js, Node.js, Express, and both PostgreSQL and MongoDB—especially when reliability and speed matter. Recently, I’ve architected Node.js/Express services handling millions of requests per day with strong p95 latency, and I’ve supported customer-facing platforms and analytics/telemetry that improve engagement and satisfaction. I also enjoy shaping internal engineering frameworks, improving development workflows with testing and performance practices, and collaborating closely with product and engineering teams to deliver secure, maintainable solutions.

Available to hire

I’m Oskar Pietka, a Senior Full-Stack Developer focused on building and scaling high-performance web applications and robust APIs. I work across the stack with Python, TypeScript/JavaScript, React, Next.js, Node.js, Express, and both PostgreSQL and MongoDB—especially when reliability and speed matter.

Recently, I’ve architected Node.js/Express services handling millions of requests per day with strong p95 latency, and I’ve supported customer-facing platforms and analytics/telemetry that improve engagement and satisfaction. I also enjoy shaping internal engineering frameworks, improving development workflows with testing and performance practices, and collaborating closely with product and engineering teams to deliver secure, maintainable solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Work Experience

Senior Full-Stack Developer at Deel

March 1, 2024 - September 1, 2025

Architected and maintained high-throughput Node.js and Express APIs processing 5M+ requests per day with p95 response times below 1 second. Co-authored and scaled the company’s internal backend framework with a 10-developer team, improving reusable core capabilities and streamlining workflows. Designed and delivered cross-functional customer-facing web applications, including React/TypeScript/Next.js frontend functionality. Built and integrated HTML/CSS within enterprise CMS platforms for multiple high-traffic websites, and implemented Node.js-based tracking for conversion funnel and engagement analytics. Supported enterprise portfolio applications generating $40M in combined annual revenue. Led cross-browser testing across four major browsers and three standalone apps, and resolved high-priority production infrastructure issues to improve reliability.

Full-Stack Developer at Aura

February 1, 2023 - January 1, 2024

Designed secure backend services and RESTful APIs for core application features and critical data distribution paths. Built responsive UI components with Next.js and React while enforcing cross-browser compatibility and optimized client-side rendering. Structured and optimized data layers across PostgreSQL and MongoDB, implementing efficient indexing and query schemas. Investigated full-stack anomalies to resolve frontend UI glitches and backend runtime errors, improving platform uptime. Contributed across the full SDLC, including deployments, automated testing scripts, and ongoing maintenance, while translating product requirements into modular software specifications with cross-functional teams.