Full-stack (Node.js/React.js)

Altamira

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Location: Poland
Job Type: full-time
Salary: Unknown
Posted: February 10, 2026

Job Description

Altamira is a software development outsourcing company. We provide solutions that make a tangible impact on our client’s growth and productivity. With domain knowledge across product and technology development, we aim to provide cost-efficient solutions without compromising quality. We are driven to deliver the best, every single time.

Altamira service delivery teams currently span Slovakia, Ukraine, and the Middle East, and we have ambitions to expand our footprint to meet the growing demand across Europe and into our primary growth markets in the UK and the US. In terms of industry verticals, we are focused on EdTech, Fintech, eCommerce, and Pharma.

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

Project

You will join an existing product with an established 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. The role requires a high level of autonomy, ownership, and the ability to work effectively in 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 usually 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, room for development and growth.
Possibility to work in the Bratislava and Kyiv offices or fully remotely.
Loyal management, interesting tasks, constant support.
Medical insurance (optional).
English courses.
Technical equipment providing.
Paid vacations 20 workdays, paid sick leave, regular salary reviews;
Flexible schedule and ability to manage your working hours;
Support your personal growth and skills upgrading.
The great environment inside the team, support of initiatives, and ability to contribute to the common goal.

🎯 Who is this job for?

This role is a strong fit for a Middle to Senior Full-Stack Engineer with solid production experience in Node.js, TypeScript, and React, and exposure to PHP/Laravel. It suits someone comfortable owning features end-to-end, working with both modern and legacy systems, and collaborating closely with an international client team. You should be confident designing REST APIs, building complex React applications, optimizing performance, and maintaining high code quality in a distributed environment.

💬 Potential Interview Questions

How do you design scalable RESTful APIs in Node.js for long-term projects?
I focus on clear resource modeling, consistent naming, proper HTTP semantics, and layered architecture to keep business logic, controllers, and data access well separated.
How does the Node.js event loop work, and why is it important for performance?
The event loop handles asynchronous operations in a single-threaded environment. Understanding it helps avoid blocking operations and ensures high throughput under load.
How do you approach working with a mixed Node.js and Laravel backend stack?
I treat each service independently while keeping contracts consistent, maintain Laravel services carefully, and gradually improve legacy areas without risky rewrites.
What strategies do you use to optimize SQL queries and database performance?
I analyze query plans, add proper indexes, reduce N+1 queries, use transactions correctly, and keep heavy logic out of the database when it hurts maintainability.
How do you handle authentication and authorization in full-stack applications?
I usually implement JWT-based authentication with role-based access control, ensuring secure token handling, proper expiration, and backend-enforced permissions.
How do you manage complex state in large React applications?
I separate server state and UI state, using tools like React Query for data fetching and caching, and local state or reducers for UI-specific logic.
What React performance optimization techniques do you use in production?
I apply memoization (useMemo, useCallback), avoid unnecessary re-renders, use code splitting, and profile components to find real bottlenecks.
How do you ensure code quality when working in a distributed, outstaffing team?
I rely on clear communication, thorough code reviews, automated testing, consistent standards, and taking ownership of features from start to finish.
How do you approach maintaining and improving legacy codebases?
I first understand existing behavior, add tests around critical paths, refactor incrementally, and prioritize stability over aggressive changes.
How do you take ownership of a feature across the full stack?
I clarify requirements, design backend and frontend together, implement and test end-to-end, handle deployment concerns, and follow up with monitoring and improvements.

📋 Job Summary

Altamira is a software development outsourcing company delivering high-impact solutions across EdTech, Fintech, eCommerce, and Pharma for international clients. We’re looking for a Full-Stack Developer to work on a long-term project, building and maintaining scalable backend services with Node.js/TypeScript and complex frontend applications with React. You’ll be fully embedded in the client’s team, taking ownership end-to-end while also extending and maintaining parts of a legacy PHP/Laravel system. The role is based in Poland with full remote flexibility and offers a competitive salary, growth opportunities, and the chance to work on a mature product with a clear roadmap and real business impact.