Full Stack Developer (Node.js, React.js)

Altamira is a software development outsourcing company dedicated to delivering solutions that significantly impact client growth and productivity. With deep domain knowledge in product and technology development, we provide cost-efficient solutions without compromising quality, striving for excellence every time.

Our service delivery teams span Slovakia, Ukraine, and the Middle East, with ambitions to expand into Europe, the UK, and the US. We specialize in EdTech, Fintech, eCommerce, and Pharma verticals.

We are seeking a Full-Stack Developer (Node.js + React) to join our team for a long-term project with an international client. This outstaffing engagement means you will be fully integrated into the client's team, collaborating closely with their engineers, product managers, and stakeholders.

Project Overview

You will join an established product with an existing codebase and an active development roadmap. The project focuses on building and maintaining scalable back-end services and complex front-end applications. You will work with modern JavaScript and TypeScript technologies while also maintaining and extending parts of a legacy system. This role demands high autonomy, ownership, and effective collaboration within a distributed team.

Requirements

Back-end (Node.js, with PHP/Laravel exposure)

• Deep, hands-on experience with Node.js in production environments.
• Strong knowledge of TypeScript and modern JavaScript.
• Experience designing and implementing RESTful APIs.
• Understanding of backend architecture patterns (layered architecture, modular design, separation of concerns).
• Solid understanding of asynchronous programming, the event loop, and performance considerations in Node.js.
• Experience working with SQL databases, including query optimization, transactions, and migrations.
• Knowledge of authentication and authorization mechanisms (JWT, OAuth, role-based access).
• Experience with error handling, logging, and monitoring in back-end services.
• Ability to write maintainable and testable code (unit and integration tests).
• Practical experience working with PHP and Laravel in production environments.
• Ability to maintain and extend existing Laravel-based services.
• Comfort working with and debugging legacy PHP/Laravel codebases.

Front-end (React.js)

• Strong experience building complex applications with React.
• Confident use of modern React patterns (hooks, context, controlled components).
• Experience with state management solutions (Redux, React Query, or similar).
• Ability to design and implement scalable component architectures.
• Strong understanding of front-end performance optimization (memoization, rendering control, code splitting).
• Experience working with forms, validation, and complex UI state.
• Knowledge of accessibility (a11y) and cross-browser compatibility.
• Experience integrating front-end applications with APIs and handling asynchronous data flows.
• Ability to maintain consistent UI/UX in large codebases.

Responsibilities

• Develop and maintain back-end services using Node.js and TypeScript.
• Design, implement, and evolve RESTful APIs.
• Maintain and extend existing PHP and Laravel services.
• Build and maintain complex front-end applications using React.
• Collaborate closely with the client's team on feature development and technical decisions.
• Ensure code quality through testing, code reviews, and best engineering practices.
• Work with existing and legacy systems, improving stability and maintainability.
• Take ownership of features end-to-end, from implementation to delivery.
• Contribute to performance, reliability, and scalability improvements across the full stack.

Our transparent recruitment journey typically takes up to 2 weeks and includes a few stages:

• Recruiting Interview (30-45 min)
• Technical Interview (1-1.5h)
• Client Interview (optional, up to 1h)
• Pre-Offer Call (15min)
• Reference Check
• Offer

We Offer:

• Competitive salary, with opportunities for development and growth.
• Possibility to work in our Bratislava and Kyiv offices or fully remotely.
• Supportive management, interesting tasks, and constant assistance.
• Medical insurance (optional).
• English courses.
• Technical equipment provision.
• 20 paid vacation workdays, paid sick leave, regular salary reviews.
• Flexible schedule and ability to manage your working hours.
• Support for personal growth and skills upgrading.
• A great team environment, support for initiatives, and the ability to contribute to common goals.

We believe that the success of altamira.ai is intrinsically linked to the success of our Talents and our Clients!