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Hi, I’m Alexander, a Senior/Lead Full-Stack Engineer with 15+ years of experience building scalable, product-focused applications using Node.js, Ruby on Rails, and modern frontend frameworks. I take full ownership of systems, balance fast delivery with durable solutions, and leverage production feedback to drive iteration. I’m comfortable across backend, frontend, and infra, with a strong focus on delivering user value and improving developer productivity. I enjoy mentoring engineers, aligning teams around clear API contracts, and shaping architecture that scales with business needs.…Hi, I’m Alexander, a Senior/Lead Full-Stack Engineer with 15+ years of experience building scalable, product-focused applications using Node.js, Ruby on Rails, and modern frontend frameworks. I take full ownership of systems, balance fast delivery with durable solutions, and leverage production feedback to drive iteration. I’m comfortable across backend, frontend, and infra, with a strong focus on delivering user value and improving developer productivity. I enjoy mentoring engineers, aligning teams around clear API contracts, and shaping architecture that scales with business needs.

Alexander

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

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Hi, I’m Alexander, a Senior/Lead Full-Stack Engineer with 15+ years of experience building scalable, product-focused applications using Node.js, Ruby on Rails, and modern frontend frameworks. I take full ownership of systems, balance fast delivery with durable solutions, and leverage production feedback to drive iteration. I’m comfortable across backend, frontend, and infra, with a strong focus on delivering user value and improving developer productivity. I enjoy mentoring engineers, aligning teams around clear API contracts, and shaping architecture that scales with business needs.…Hi, I’m Alexander, a Senior/Lead Full-Stack Engineer with 15+ years of experience building scalable, product-focused applications using Node.js, Ruby on Rails, and modern frontend frameworks. I take full ownership of systems, balance fast delivery with durable solutions, and leverage production feedback to drive iteration. I’m comfortable across backend, frontend, and infra, with a strong focus on delivering user value and improving developer productivity. I enjoy mentoring engineers, aligning teams around clear API contracts, and shaping architecture that scales with business needs.

Available to hire

Hi, I’m Alexander, a Senior/Lead Full-Stack Engineer with 15+ years of experience building scalable, product-focused applications using Node.js, Ruby on Rails, and modern frontend frameworks. I take full ownership of systems, balance fast delivery with durable solutions, and leverage production feedback to drive iteration.

I’m comfortable across backend, frontend, and infra, with a strong focus on delivering user value and improving developer productivity. I enjoy mentoring engineers, aligning teams around clear API contracts, and shaping architecture that scales with business needs.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Software Engineer, Team Lead (Full-Stack) at Kimelo

October 1, 2024 - Present

Designed and implemented API contracts used across teams, reduced integration bugs, and built internal code-generation tools that accelerated feature delivery. Implemented a schema-driven GraphQL validator, improved CI stability, defined service boundaries and integration patterns, and mentored engineers to raise development standards. Delivered end-to-end features across backend (Node.js/Rails), frontend, and Infra, driving user value and developer productivity.

Senior Software Engineer at Loxo

October 1, 2022 - July 1, 2024

Owned long-term development of platform architecture, iterating base features to support product growth. Implemented backend and frontend features, designed multi-service systems and API integrations, and improved developer experience through tooling and automation. Collaborated with product requirements to translate them into scalable technical solutions.

Senior Software Engineer at MoneySmart

June 1, 2018 - January 1, 2022

Delivered product features across backend and frontend, contributing to user-facing improvements. Maintained and evolved Node.js and React applications in production, refactored legacy systems to improve maintainability and performance, and shipped features in a fast-paced environment.

Senior Software Engineer at MoovwebWarsaw

October 1, 2015 - May 1, 2018

Delivered backend and frontend features, contributed to product growth, and refactored legacy systems to improve maintainability and performance. Consistently shipped features in a fast-paced environment.