Marek User
@marek
I am a senior full-stack engineer building scalable, high-performance applications.
PolandWhat I'm looking for
I am a Senior Full-Stack Software Engineer with over 8 years delivering scalable, high-performance applications across finance, healthcare, e-commerce, travel, and media. I focus on building reliable systems that meet production demands.
I design and implement both frontend and backend components, using React, Next.js, JavaScript (ES6+), TypeScript, Node.js, NestJS, and Express to create modular, maintainable code. I build secure REST and GraphQL APIs and tune databases for improved performance and reliability.
I deploy and operate cloud-native services on Google Cloud Platform and AWS (S3, Lambda), containerize with Docker, and manage deployment pipelines to enforce quality and uptime. I apply Clean Architecture, microservices patterns, and testing practices (Jest, React Testing Library, unit & integration testing) to reduce latency and improve user experience.
I have led development of mission-critical systems, collaborated with distributed teams to meet tight release schedules, and re-engineered legacy tools into modern solutions. I look for opportunities to solve complex problems, drive technical quality, and mentor colleagues in high-performing teams.
Experience
Work history, roles, and key accomplishments
Senior Software Engineer
Atula Technologies Ltd
May 2022 - Present (3 years 4 months)
Designed and implemented new features for enterprise-level applications, developing secure, scalable APIs and tuning databases to improve performance and reliability.
Software Engineer
INTERBYTES
Apr 2020 - May 2022 (2 years 1 month)
Led development of mission-critical systems for international clients, optimizing architecture and deployment pipelines to improve scalability and code quality.
BRSoftware Engineer
Brainly
Jul 2019 - Apr 2020 (9 months)
Built modular backend systems integrated with customer-facing interfaces, managing complex data workflows and ensuring high availability under heavy load.
Junior Software Engineer
Polcode
Jun 2017 - Jul 2019 (2 years 1 month)
Re-engineered legacy business tools into modern, maintainable solutions, transitioned APIs and improved system integration while collaborating with QA and DevOps to streamline deployments.
Education
Degrees, certifications, and relevant coursework
NUNanyang Technological University
Bachelor of Computer Science, Computer Science
2013 - 2017
Bachelor of Computer Science at Nanyang Technological University from 2013 to 2017.
Tech stack
Software and tools used professionally
Availability
Location
PolandAuthorized to work in
Job categories
Skills
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