OverviewIn this role you will own features end-to-end across the stack, from database and backend services to the UI.

You'll collaborate with designers, PMs and engineers to ship iterative features, focused on maintainability and scalability.

You'll strengthen observability, testing, and operations while balancing legacy and modern tech.

You'll shape the product with data-driven decisions and actively contribute to engineering guilds and cross-team initiatives.

This is a hands-on, impact-driven position at a scalable SaaS platform used across Europe, with a strong emphasis on UX and system quality.

Compensaciones / Beneficios28-days holiday

bank holidays

monthly vouchers

remote work

mental health support

equal opportunities

ResponsabilidadesOwn features end-to-end across the stack (DB schema, backend, UI) from design to deployment and operations

Pair with engineers, designers, and PMs to ship features and iterate based on usage

Participate in design and code discussions, making trade-offs affecting product and team

Maintain automated testing across unit, integration, and end-to-end levels

Improve observability with metrics, dashboards, and alerts using tools like Datadog, Sentry, and web vitals

Design and build backend services and APIs in Java and Spring Boot,



including event-driven flows with RabbitMQ

Take ownership of services with a DevOps mindset from architecture to deployment and operations

Validate ideas with data by instrumenting work and measuring impact to guide scaling

Be an active member of the Engineering Guild to share ideas and tackle cross-team challenges

Lead technical discussions on trade-offs in features, architecture, and UX

Navigate a hybrid codebase balancing legacy Backbone with modern React/TypeScript

Build internal tools to help operations and support teams move fast without risk

Requisitos principales7+ years of software development experience

Strong focus on modern web frontend and hands-on backend services

Own features end-to-end with responsibility for code and areas owned

Product mindset with user-centric thinking

Data-driven with instrumentation and evidence-based decision making

Comfort with ambiguity in complex domains

Excellent English communication skills and ability to explain complex ideas

Experience working with remote and co-located teams

Willingness to leverage AI tools in daily development workflow

collaborative

strong communication

proactive problem-solving

React, TypeScript

Java, Spring Boot

RabbitMQ

📌 Senior Full Stack Developer - React/Java (Remote) (Valladolid)
🏢 Treatwell
📍 Valladolid