Full-Stack Engineer

Location
Croatia
Rate, USD
Not specified
Work schedule
Full Time,
Language skills
English
Available for Hire
Yes
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About me

I am a Full-Stack Engineer with over 3 years of experience delivering production-ready React and TypeScript systems tailored for fintech, SaaS, and digital asset clients. I take pride in owning features end-to-end, from gathering requirements and designing UI to implementing backend logic, authentication, Stripe billing, deployment, and quality assurance. My approach emphasizes fast remote delivery, clean API contracts, and leveraging AI-assisted workflows without compromising engineering quality.

Throughout my career, I have designed and maintained client-facing product surfaces across multiple concurrent streams, ensuring seamless integration and robust performance. I have engineered backend workflows using Node.js, Express, Supabase, and PostgreSQL, focusing on reducing integration bugs and improving system reliability. My commitment to testing is demonstrated by implementing Jest coverage that significantly cuts production regressions.

I am experienced in standardizing development environments using Docker, which has eliminated environment-specific bugs and streamlined deployment processes. I actively use AI tools like Claude and GitHub Copilot to accelerate delivery speed while maintaining clean, reviewable code. My work includes building operational dashboards, optimizing API latency, and improving page load speeds through efficient state management and lazy loading.

I have successfully delivered numerous custom web applications for fintech, digital asset, and e-commerce clients, converting complex business workflows into authenticated dashboards and payment flows. I architect secure authentication flows, relational data models, and REST API endpoints that handle large volumes of data with full integrity. Additionally, I have developed a library of reusable React/TypeScript components to reduce setup time and deployment failures.

My projects include AI productivity SaaS platforms, travel intelligence tools, geopolitical risk dashboards, developer growth platforms, and real-time social conversation applications. I am proficient in frontend and backend technologies, payments and authentication systems, cloud and DevOps tools, testing frameworks, and AI development tools. I am passionate about building scalable, maintainable, and user-focused software solutions.


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Experience

Jan 2025 - Present Full-Stack Engineer @ TokenFlow

Designed and maintained client-facing React/TypeScript product surfaces across 3+ concurrent streams, owning features from requirements through production deployment. Engineered backend-connected workflows with Node.js/Express, Supabase/PostgreSQL, auth/session logic, and Stripe billing flows, reducing integration bugs by 35%. Implemented Jest coverage for critical auth, payment, and saved-data flows, achieving 85%+ test coverage and cutting production regressions by 40%. Standardized Docker environments across local and staging, eliminating 90% of environment-specific bugs across active product streams. Used AI-assisted refactoring and debugging (Claude, Copilot) to accelerate delivery speed by approximately 30% while maintaining clean, reviewable code.

Dec 2023 - Jan 2025 Full-Stack Software Engineer @ ScaleRoad LLC

Built operational dashboards for records, payments, subscriptions, and status tracking using React, TypeScript, Node.js, and PostgreSQL, serving 10K+ monthly active users. Implemented strict API contracts and aggressive data-caching strategies, reducing API latency by 30% on latency-sensitive product surfaces. Optimized state-management patterns and lazy-loading across dashboard views, improving page load speed by 40%. Turned undefined product ideas into complete full-stack workflows – shaping requirements, designing UI flows, connecting backend logic, testing edge cases, and shipping production-ready features within tight deadlines.

Jan 2023 - Dec 2023 Full-Stack Engineer (Contract / Remote) @ Vertex Digital Studio

Delivered 15+ custom web applications for fintech, digital asset, and e-commerce clients, converting business workflows into authenticated dashboards, CRUD views, and payment flows. Architected secure auth flows, relational data models, and 20+ REST API endpoints across client projects, handling 500K+ daily data rows with 100% data integrity. Built a library of 30+ reusable React/TypeScript components, reducing repeated setup work by 50% and cutting deployment failures by 25% through automated testing. Managed full end-to-end delivery independently: scope, planning, implementation, testing, deployment, documentation, and client handoff.


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