Jesper Kowalski
I’m a senior AI full stack engineer with 7+ years of experience building scalable backend systems, cloud-native applications, and real-time streaming platforms.
About
I’m a senior AI full stack engineer with 7+ years of experience building scalable backend systems, cloud-native applications, and real-time streaming platforms. I work across Python, FastAPI, Node.js, NestJS, and Golang, designing REST APIs and microservices with a strong focus on performance, secure authentication, and production reliability.
Across my roles, I’ve optimized PostgreSQL queries and caching strategies, integrated third-party services and payment gateways, and implemented CI/CD pipelines to automate testing and deployments. I also bring hands-on experience with AWS, Docker, distributed systems, and AI-powered integrations—collaborating closely with cross-functional teams to deliver end-to-end features that scale.
- 7 years' experience
- Joined October 2026
Industry experience
- Software & Internet
Work experience
Designed and implemented scalable backend services and APIs. Built microservices handling high-volume data processing workloads and developed secure JWT/OAuth authentication and authorization systems. Optimized PostgreSQL queries, caching strategies, and overall database performance. Integrated payment gateways and third-party service APIs. Implemented CI/CD pipelines for automated testing and deployments, and collaborated with cross-functional teams to deliver end-to-end features in production environments.
Architected and developed scalable microservices-based backend systems. Designed and maintained RESTful and GraphQL APIs for web applications, improving backend performance, scalability, and system reliability. Implemented AWS cloud-native solutions and infrastructure integrations. Built Dockerized environments and automated CI/CD deployment pipelines, partnering with frontend teams for end-to-end feature delivery. Mentored junior developers and conducted code reviews to maintain code quality.
Supported backend engineering initiatives by developing APIs, improving application performance, and collaborating with senior developers on scalable web application systems.
Education
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