Senior Full Stack Engineer

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Full Stack Engineer in Spain.

This role offers the opportunity to shape and scale a globally distributed HR and payroll platform that powers work for millions of people across more than 150 countries. You will work in a highly collaborative, remote-first engineering environment where autonomy, ownership, and technical excellence are deeply valued. The position involves building end-to-end features across both frontend and backend systems, contributing directly to the reliability and scalability of a mission-critical global infrastructure. You will collaborate closely with Product, Design, and DevOps teams to deliver seamless, high-performance user experiences. The work spans modern web technologies and cloud-native architectures, with a strong focus on quality, security, and maintainability. This is a high-impact engineering role where your contributions will directly influence how global teams are hired, managed, and paid.

• Design, develop, and maintain full-stack web applications using TypeScript, JavaScript, React, and Express, ensuring scalable and maintainable architecture across systems.
• Build and optimize server-side APIs, business logic, and data models, primarily using Express and related backend frameworks.
• Develop responsive, component-driven frontend interfaces using React, including hooks, reusable components, testing, and performance optimization.
• Design and manage database schemas and queries in PostgreSQL, ensuring efficient data handling and system reliability.
• Create modular, reusable code across frontend and backend systems to improve development efficiency and product scalability.
• Perform debugging, testing, and code reviews to ensure high-quality, secure, and reliable software delivery.
• Collaborate cross-functionally with engineering, product, and design teams while contributing to continuous improvement of engineering practices and tools.

Requirements

• 8+ years of experience in full-stack software development with strong expertise in TypeScript-based development environments.
• Strong proficiency in modern web technologies including React, JavaScript/TypeScript, Express, and relational databases such as PostgreSQL.
• Solid understanding of RESTful APIs, microservices architecture, asynchronous programming, and scalable system design.
• Experience with testing frameworks such as Jest, Mocha, Chai, React Testing Library, Storybook, and Cypress is highly desirable.
• Familiarity with cloud-based SaaS environments and production-grade distributed systems.
• Knowledge of containerization tools such as Docker and Kubernetes is a strong plus.
• Excellent communication skills with the ability to collaborate across technical and non-technical stakeholders in a remote-first environment.
• Strong sense of ownership, attention to detail, and a customer-focused mindset when delivering technical solutions.

Benefits

• Competitive total compensation package aligned with experience and location.
• Stock grant opportunities depending on role and employment type.
• Fully remote-first work model with optional access to shared workspaces.
• Comprehensive benefits and perks tailored by country and employment status.
• Learning and development opportunities to support continuous professional growth.
• Inclusive, global work environment with strong emphasis on diversity and flexibility.