QA Developer.

Remote Quality Assurance & Testing Full-Time

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QA Developer: our view in 3 lines...

The Role:This role is for a junior QA and backend-focused developer working on client sites, applications, and AI-assisted code review in a digital marketing agency.
The Person:The person will test and develop features, review AI-generated code, trace and fix bugs, break AI features to document issues, and monitor web speed optimisation after each release.
Requirements:The ideal candidate can read and write JavaScript, works comfortably with React or Vue, understands PHP and/or Node, and has experience testing REST or GraphQL endpoints.

About the role

We are seeking an enthusiastic and highly skilled Quality Assurance (QA) Developer to join our fast-paced and innovative digital marketing agency. As a key member of our dev team, you will work closely with our developer team to design, develop, and maintain backend systems that power the sites and applications of our clients.

Applicants must be fluent in Spanish and English (as interviews are in both languages). Please submit resume in English.

What You'll Do

Work closely with our Technology Lead, IA Developers and UX/UI Design Lead to test and develop features.

Review code produced with AI assistance before it reaches a client: check it does what the ticket asked, follows our conventions, and doesn’t contain invented APIs or bugs that look plausible at a glance.

Work with our AI Developer to figure out how to fix it: what’s actually wrong, what the fix should be, and whether it risks breaking something else.

Trace it to its cause — front-end, back-end or prompt — rather than stopping at the symptom, and see the fix through.

Try to break our AI features on purpose, and document every case that works.

Monitor Web Speed Optimization efforts after each release.

Proactively report to our internal Project Manager and IA Developers and manage your schedule to ensure all deadlines are met.

We’re hiring someone who wants to build, not only to fix. As you get comfortable, you’ll take on development tasks alongside the AI Developer on both internal tools and client features.

Who You Are

Located in Europe — this position requires you to work in accordance with our Spain office’s working hours (10am-6pm CET)

Must be fluent in Spanish and professional, working English.

Around 1 year of experience in web development or QA.

Able to read and write JavaScript, and comfortable around a modern framework (React or Vue).

Working knowledge of HTML5 and CSS3, enough to spot layout, responsive and cross-browser issues.

Understanding of back-end logic (PHP and/or Node) so you can follow a feature end to end.

Experience testing REST or GraphQL endpoints.

Experience working inside Git and in an Agile environment.

Comfortable working with AI assistants as part of your workflow — writing good prompts, reviewing generated code critically, and knowing when not to trust the output.

Any hands-on experience with LLMs, even personal projects.

A keen eye for detail, interactivity and animation.

A true team player who can work closely with others.

Any hands-on experience with LLMs, even personal projects.

Perks and Benefits

15 observed holidays + 23 PTO days per year

Indefinite contract following a trial period of 6 months

Permanent remote work + work from home stipend

Dedicated budget for professional development

Compensated onsite retreats at our Bilbao HQ

The opportunity to join a dynamic, close-knit team that loves going to work with and for each other every day

About Terra

Terra is a digital marketing and creative agency built by an integrated and international team of content creators, strategists, designers, and developers. We help organizations reimagine and deliver their most ambitious digital projects and initiatives by acting as an extension of our clients’ teams and delivering exceptional online experiences, content, and marketing strategies.

Our team is innovative, tech-forward, and creative by nature. We are dedicated to pushing boundaries and staying ahead of the curve in today’s ever-evolving digital landscape. We believe in the power of collaboration and foster a work environment that encourages creativity and growth. And with a strong focus on work-life balance, we prioritize the well-being and career development of our team members. Finally, we are committed to promoting from within and offering meaningful opportunities for professional growth.

Terra is also an equal opportunity employer.

We recruit, employ, train, compensate, and promote team members regardless of their race, religion, color, national origin, sex, disability, age, veteran status, or any other protected status (as required by applicable law).

Our top goal as an employer is to bring together a diverse mix of talented people who are excited to join our company, stay with Terra for a long time, and do their best work while they’re here. We take pride in the quality of the services and work we provide to our clients, and we know none of it is possible without the hard work and commitment of our passionate and creative employees.

Published September 17, 2026

Location Bilbao, Spain

Category Quality Assurance & Testing

Job Type Full-Time

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