Senior Fullstack Engineer (Java/Kotlin + Javascript)

Who is Parser?

Technology alone does not create impact- the right teams do. Founded in 2018, Parser is a boutique technology services and consulting firm helping global organisations solve complex business challenges through digital transformation, product development and AI enablement.

We are a fast-growing team of 340+ engineers and consultants across Europe (UK, Spain, Portugal), the Americas (US, Argentina, Uruguay, Colombia), and the Middle East.

We combine global reach with a mindset focused on agility, senior expertise, and close collaboration. We work as an extension of our clients' teams, helping them define the right problems, shape solutions, and deliver technology-driven outcomes that create measurable business value. Our expertise spans software engineering, AI & data, product development, and customer experience, delivered by teams that combine strong technical depth with a consulting mindset.

Why Join Us? If you are looking for a place where you can think beyond execution, take true ownership of outcomes, influence decisions, and continuously learn alongside top-tier specialists in a truly global environment, we'd love to meet you.

How we will impact? We are seeking a motivated and detail-oriented Senior Full Stack Engineer to drive the development of scalable, user-centric solutions across our entire technology stack.

This role focuses on building robust backend services alongside modern frontend experiences that power the travel ecosystem. You'll work on systems that directly impact customer experience and business outcomes, taking ownership from API design through user interface implementation.

Your key responsibilities: Backend Development: Develop and maintain scalable backend services using JVM languages (Java, Kotlin) that power distributed systems

Design and implement RESTful APIs and integration patterns for microservices architecture

Optimize database performance (SQL, NoSQL)



and design efficient data access patterns

Build event-driven and asynchronous systems that handle complex workflows

Frontend Development: Develop responsive, user-centric frontend applications using modern web technologies

Collaborate with product and design teams to translate requirements into elegant, performant UI solutions

Implement client-side logic for data visualization, state management, and real-time interactions

Ensure cross-browser compatibility and accessibility standards

Cross-Functional: Lead small, well-defined projects across the full stack, taking end-to-end ownership

Collaborate with team members to co-develop solutions and resolve problems

Apply software design principles, data structures, and design patterns to write clean, maintainable, modular code

Understand system and technology integration across distributed services

Help coordinate stakeholder input when developing solutions

Proactively identify inefficiencies and opportunities for technical improvement

Test, monitor, and debug applications effectively across layers

What you'll bring to the role: +4 years of software development experience in team environments of at least five engineers (agile, version control, etc.)

Proven expertise with JVM languages (Java/Kotlin) in production environments

Strong proficiency in modern frontend technologies (HTML5, CSS3, JavaScript/TypeScript, reactive frameworks)

Experience with frontend frameworks like React is a plus

Experience building and maintaining distributed systems in public or hybrid cloud infrastructure

Solid understanding of data storage (SQL, NoSQL),



API design, and microservices integration patterns

Demonstrated ability to test, monitor, and debug applications across the full stack

Experience with testing and monitoring tools

Ability to grasp how projects fit within team objectives and business needs

Comfortable working with moderately to highly complex systems

Experience with event-driven architectures

Familiarity with containerization and orchestration (Docker, Kubernetes)

Understanding of CI/CD pipelines and DevOps practices

Bachelor's degree in Computer Science or related field (or equivalent experience)

Location: Candidates based in Madrid, Spain: Hybrid model, 3 days per week in the office in Chamartin

You will receive: The chance to join an organization with triple-digit growth that is changing the paradigm on how software products are built.

The opportunity to be part of an amazing, multicultural community of tech experts.

A highly competitive compensation package.

A versátil and hybrid working environment.

Medical insurance.

Parser is committed to fostering an inclusive workplace and providing equal employment opportunities to all applicants regardless of race, religion, gender, sexual orientation, age, disability, or any other protected characteristic under applicable law.

If you require reasonable accommodations during the recruitment process, please let us know and we will work with you to support your participation.

By applying to this role, you acknowledge that your personal data will be processed in accordance with Parser's Privacy Notice for recruitment purposes.

Parser may use AI-assisted tools during certain stages of the recruitment process to support operational efficiency. Our recruiting teams use AI to streamline note-taking and scheduling. All hiring decisions are made by people, with human review and oversight.

Come and join our #ParserCommunity.

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📌 Mid-level Fullstack Engineer (Java/Kotlin + Javascript) (Madrid)
🏢 Parser
📍 Madrid