Senior Fullstack Engineer

Jobgether; Spain; Remote; EUR 60,000 - 100,000; Full time

Benefits offered by this job

Fully remote work

Professional development

Technical ownership

Collaborative culture

Mentorship opportunities

Career growth

International environment

Job summary

Jobgether, a partner-backed opportunity in Spain, seeks a Senior Fullstack Engineer to build and evolve financial and billing applications using React, TypeScript, and Ruby on Rails. You will own front-end features and contribute to back-end APIs, with GraphQL to connect services.

You will mentor teammates, drive technical initiatives, and collaborate with Product and engineering to translate business needs into scalable solutions.

Qualifications

• 5+ years of professional web development experience.
• Strong proficiency in React and TypeScript.
• Hands-on experience with Ruby on Rails.
• Experience with GraphQL and API design.
• Ability to design scalable, maintainable applications.
• Excellent collaboration and communication skills.

Responsibilities

• Design, develop, test, and improve financial operation applications.
• Build front-end features with React/TypeScript and integrate with Rails APIs.
• Develop Rails APIs and GraphQL data exchanges.
• Write automated tests and conduct code reviews.
• Mentor teammates and lead technical initiatives.
• Contribute to architectural decisions and on-call rotation.

Skills

React

TypeScript

Ruby on Rails

GraphQL

Frontend development

Backend development

Testing/QA

Tools

GraphQL

Ruby on Rails

REST APIs

Job description

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Fullstack Engineer based in Spain.

As a Senior Fullstack Engineer, you will help build and evolve the technology powering critical financial and billing operations. You will work across the full stack, with a strong focus on developing modern, reliable front-end applications using React and TypeScript. You will also contribute to back-end services and APIs built with Ruby on Rails, using GraphQL to connect applications and systems. Working closely with Product and engineering colleagues, you will help translate business needs into scalable technical solutions. This role offers opportunities to take ownership of technical initiatives, improve development practices, and influence the evolution of the codebase. You will also contribute to team growth through collaboration, knowledge sharing, and mentoring.

Accountabilities

• You will contribute to the design, development, testing, and continuous improvement of applications supporting financial operations, while taking an active role in technical decision-making and team collaboration.
• Develop clean, efficient, maintainable, and testable code using React, TypeScript, and Ruby.
• Build, update, and integrate front-end features and components within React applications.
• Implement and maintain Ruby on Rails APIs to ensure reliable communication between front-end and back-end systems.
• Work with GraphQL to support data exchange between single-page applications and their back-end services.
• Write automated tests, perform manual testing, and review colleagues’ code to maintain high-quality standards.
• Collaborate with Product and engineering teams to align technical solutions with business objectives and non-functional requirements.
• Contribute ideas, improve team processes, communicate progress, and take ownership of development initiatives.
• Mentor colleagues, provide constructive feedback, and support the professional growth of other team members.
• Evaluate different technical approaches by considering performance, security, availability, maintainability, reliability, and user impact.
• Lead technical initiatives, drive improvements to the codebase, and participate in the team's on-call rotation as you grow into the role.
• Stay curious, explore new technologies, and continuously develop your technical expertise.

Requirements

The ideal candidate is an experienced fullstack developer with strong front-end expertise, solid back-end knowledge, and the ability to take ownership of complex technical challenges in a collaborative, fast-paced environment.

• 5+ years of professional web development experience.
• Strong proficiency in React and TypeScript, including integrating front-end components with back-end systems.
• Hands-on experience with Ruby on Rails.
• Solid understanding of back-end development principles, databases, clean code practices, and software testing methodologies.
• Ability to design and implement scalable, maintainable, and performant applications.
• Experience evaluating technical trade-offs and considering multiple solutions before selecting the most appropriate approach.
• Understanding of key software quality dimensions, including user experience, fault tolerance, security, availability, performance, and maintainability.
• Proactive mindset, adaptability, and the ability to lead projects while collaborating effectively with cross-functional teams.
• Strong communication skills, with the ability to explain complex technical concepts clearly.
• Comfortable working in a fast-paced, rapidly evolving environment while managing competing priorities, deadlines, and diverse stakeholders.
• Genuine enthusiasm for technology, continuous learning, and experimenting with new tools and approaches.
• Strong individual contributor capabilities, with a hands-on approach to solving problems and delivering technical results.

Benefits

• Fully remote work: Join a globally distributed organization with a remote-first working environment.
• Professional development: Access company-wide training and opportunities to expand your technical knowledge.
• Technical ownership: Take the lead on engineering initiatives and contribute directly to architectural and codebase improvements.
• Collaborative culture: Work closely with Product and engineering teams in an environment that encourages knowledge sharing and innovation.
• Mentorship opportunities: Develop your leadership skills by supporting and mentoring other engineers.
• Career growth: Build a deeper understanding of the technical stack, business domain, and product development lifecycle.
• International environment: Collaborate with talented professionals across different locations and backgrounds.

Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.