I’m a Senior Software Engineer with 9+ years of experience building scalable web platforms, specializing in backend systems, cloud infrastructure, and full-stack development. I’ve designed and delivered production-grade marketplace, fintech, and SaaS solutions using technologies like Node.js, React, AWS, and event-driven architectures with Kafka. In my recent roles, I’ve led the development of high-performance systems handling large volumes of transactions, implemented secure payment integrations (Stripe, PayPal), and built modular platforms combining e-commerce and community features such as forums, CMS, and real-time interactions. I’ve worked across startups and enterprise environments, consistently focusing on performance, scalability, and clean, maintainable code. What sets me apart is my ability to take a product from concept to production with strong architectural thinking, combined with hands-on delivery. I don’t just write code—I design systems that scale, make pragmatic technology decisions, and ensure long-term maintainability while keeping business goals in focus.

Kamil Serwata

I’m a Senior Software Engineer with 9+ years of experience building scalable web platforms, specializing in backend systems, cloud infrastructure, and full-stack development. I’ve designed and delivered production-grade marketplace, fintech, and SaaS solutions using technologies like Node.js, React, AWS, and event-driven architectures with Kafka. In my recent roles, I’ve led the development of high-performance systems handling large volumes of transactions, implemented secure payment integrations (Stripe, PayPal), and built modular platforms combining e-commerce and community features such as forums, CMS, and real-time interactions. I’ve worked across startups and enterprise environments, consistently focusing on performance, scalability, and clean, maintainable code. What sets me apart is my ability to take a product from concept to production with strong architectural thinking, combined with hands-on delivery. I don’t just write code—I design systems that scale, make pragmatic technology decisions, and ensure long-term maintainability while keeping business goals in focus.

Available to hire

I’m a Senior Software Engineer with 9+ years of experience building scalable web platforms, specializing in backend systems, cloud infrastructure, and full-stack development. I’ve designed and delivered production-grade marketplace, fintech, and SaaS solutions using technologies like Node.js, React, AWS, and event-driven architectures with Kafka.

In my recent roles, I’ve led the development of high-performance systems handling large volumes of transactions, implemented secure payment integrations (Stripe, PayPal), and built modular platforms combining e-commerce and community features such as forums, CMS, and real-time interactions. I’ve worked across startups and enterprise environments, consistently focusing on performance, scalability, and clean, maintainable code.

What sets me apart is my ability to take a product from concept to production with strong architectural thinking, combined with hands-on delivery. I don’t just write code—I design systems that scale, make pragmatic technology decisions, and ensure long-term maintainability while keeping business goals in focus.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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Work Experience

Senior Software Engineer at Netic
January 1, 2024 - December 31, 2025
Designed and implemented a scalable Node.js microservices architecture deployed on AWS EKS for a multi-tenant marketplace handling over 1.5M monthly transactions. Optimized service orchestration and caching to reduce API latency by 38%. Built a full-stack marketplace platform with React, Next.js, and TypeScript, accelerating onboarding and engagement. Integrated secure payments via Stripe and PayPal with webhook-driven event processing and reconciliation achieving 99.98% transaction accuracy. Implemented Kafka-based event-driven workflows for real-time order/inventory updates and user notifications. Architected a modular community platform with REST and GraphQL, JWT/OAuth2 authentication, and RBAC. Built admin dashboard for moderation and analytics; optimized PostgreSQL/Redis; Led CI/CD with GitHub Actions and Docker enabling zero-downtime releases. Collaborated in Agile teams, mentoring engineers and guiding architectural decisions.
Full Stack Developer at Code District Kyiv
July 1, 2019 - January 31, 2024
Developed full-stack SaaS and marketplace applications using React, Node.js, and TypeScript for international clients with up to 500K active users. Designed RESTful and gRPC services to support high-throughput systems, improving inter-service communication by ~35%. Built modular e-commerce features with cart, checkout, and Stripe payments; implemented real-time updates with WebSockets and Kafka; optimized Redis caching and database tuning for peak loads. Led CMS integrations for dynamic content and content management. Migrated and designed scalable AWS EC2/RDS infrastructure; applied TDD with Jest, reducing production bugs by ~30%. Collaborated with cross-functional teams in Agile environments.
Software Engineer at EL Passion
May 1, 2017 - June 30, 2019
Developed modern web applications using JavaScript, React, and Node.js; built backend services with Express REST APIs; implemented responsive UI and ensured accessibility. Worked with MongoDB and PostgreSQL; integrated third-party APIs for payments, notifications, and analytics. Participated in code reviews and Agile ceremonies to maintain high-quality deliverables.
Junior Software Engineer at Mood Up
July 1, 2015 - May 31, 2017
Contributed to backend features with Node.js and frontend components; fixed bugs and optimized performance. Worked with MySQL and supported testing and deployment. Collaborated with senior developers to implement features and gain experience in Agile environments.

Education

Bachelor's Degree in Computer Science at University of Manchester
January 1, 2012 - January 1, 2015

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Retail, Financial Services, Professional Services

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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