Description

Senior JavaScript Engineer with 6+ years of commercial experience building backend-driven applications, APIs, integrations and e-commerce features.

I work primarily with JavaScript, Node.js, Express and REST APIs, with hands-on React and Redux experience. My background includes checkout and payment flows, order processing, third-party integrations, performance optimisation and production support.

I can help with:

• Node.js and REST API development

• Third-party API integrations

• React feature development and bug fixing

• E-commerce checkout, payments and order workflows

• Performance and stability improvements

• Automated testing and release support

I am available for remote, part-time and short-term projects. I can work independently on a defined task or join an existing development team that needs additional support.

Languages

English
Fluent
Spanish
Basic
Ukrainian
Native or bilingual
Russian
Native or bilingual

Workplace preferences

Can work on-site

Valencia (up to 50km)

Capgemini
Senior Software Engineer (JavaScript / Backend)
December 2023 - Today (2 years and 7 months)
• • Backend development using server-side JavaScript in large-scale product environments
• • Design and implementation of REST APIs and third-party integrations
• • Ownership of features from technical design to production support
• • Collaboration with product, frontend, and external partners in an English-speaking setup
JavaScript Node.js React.js SFCC API
Wallashops
Software Engineer (JavaScript
January 2021 - December 2023 (2 years and 11 months)
• • Built API-driven features and backend services using JavaScript
• • Integrated advertising, analytics, and monetisation-related platforms
• • Contributed to frontend features using React when required
• • Worked on performance-critical user flows and platform stability
Speroteck
Software Engineer (Backend / Integrations)
January 2021 - February 2022 (1 year and 1 month)
• • Designed and implemented REST APIs and integrations with payment, tax, shipping, and review systems.
• • Worked on data-heavy eCommerce workflows involving orders, products, pricing, and internationalisation.
• • Improved checkout and purchase flows to enhance reliability and conversion.