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Senior Full Stack Developer Job Opening In Cataluña – Now Hiring KEENFOLKS


Job description

Join to apply for the Senior Full Stack Developer role at KEENFOLKS .

Who We Are At Keenfolks , we’re redefining what it means to be a marketing agency in the age of AI.

We’re an integrative AI marketing powerhouse that blends human creativity with cutting‑edge technology to craft personalised, high‑impact solutions for some of the world’s most iconic brands.

We integrate AI into existing marketing operations; we don't just advise—we build, deploy, and operate AI systems that deliver measurable results.

We make current marketing investments work harder through intelligent automation and data integration.

Role Overview We’re looking for a Senior Full Stack Developer to join our fast‑growing tech team.

In this role, you’ll design, develop, and optimise scalable, high‑performance web applications, working across both front‑end and back‑end environments.

You’ll collaborate closely with cross‑functional teams, integrating modern technologies and best practices to deliver clean, efficient, and impactful AI solutions.

Your Responsibilities Lead the architecture, design and development of front‑end applications using React (Next.js/Vite) or Vue.js, following the atomic design principle.

Build reusable UI components, ensuring a consistent and accessible design system.

Develop and maintain backend services using TypeScript (Node.js) and Python (FastAPI).

Collaborate closely with Product and Design to translate ideas into clean, efficient, and delightful user experiences.

Integrate and optimise modern AI tooling into the development workflow— from code generation and refactoring to testing and documentation.

Contribute to architecture decisions, code reviews, and technical strategy.

Deploy, manage, and scale projects using SST Framework (Serverless Stack) – Nice to have.

Requirements 6 years of professional experience as a Full Stack and Frontend Engineer.

Deep expertise in TypeScript and modern React (Next.js) or Vue.js development.

Strong understanding of UI/UX principles and design systems (atomic design, component libraries, accessibility).

Proficiency with Node.js and/or FastAPI (Python) on the backend.

Solid understanding of modern CI/CD pipelines, API design, and state management.

Demonstrated experience using AI tools (Claude Code, Cursor, GitHub Copilot, GPT, etc.) to enhance productivity and code quality—be ready to share examples.

Excellent communication, problem‑solving, and collaboration skills.

Nice to Have Experience with APIs, Docker, or cloud environments.

Experience with SST (Serverless Stack) for AWS‑based deployments.

Familiarity with infrastructure‑as‑code, serverless architectures, and event‑driven systems.

What We Offer Hybrid Work: 2 days in our beautiful office, 3 from home.

Free Lunch on office days.

Coffee, tea & fresh fruit always available.

Office fun: ping pong, yoga, and social activities.

Free Friday afternoons.

Afterworks & team building every month.

Work from anywhere for 30 days/year.

Birthday day off to celebrate your day.

23 vacation days 2 personal days.

Learning & Development Program focused on AI innovation.

Career growth and continuous upskilling opportunities.

A dynamic, entrepreneurial culture that values creativity, trust, and constructive freedom.

Your Attitude At Keenfolks , we believe innovation starts with curiosity and courage—the courage to experiment, to fail fast, and to learn faster.

We’re constantly pushing boundaries, seeking greatness over comfort, and rewarding those who challenge the status‑quo.

If you’re a visionary who learns from every experience, embraces change, and thinks like an entrepreneur, you’ll fit right in.

Diversity Matters At The Keenfolks , we’re proud to be an equal‑opportunity employer.

We believe true innovation thrives in diversity of people, ideas, and perspectives and we’re committed to building a culture where everyone belongs and can do their best work.

Want to Know More?

Follow us on LinkedIn to discover our culture, values, and projects shaping the future of AI‑driven marketing.

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Required Skill Profession

It / Computing / Software


  • Job Details

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Unlock Your Senior Full Potential: Insight & Career Growth Guide


Real-time Senior Full Jobs Trends (Graphical Representation)

Explore profound insights with Expertini's real-time, in-depth analysis, showcased through the graph here. Uncover the dynamic job market trends for Senior Full in Cataluña, Spain, highlighting market share and opportunities for professionals in Senior Full roles.

86440 Jobs in Spain
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780 Jobs in Cataluña
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Download Senior Full Jobs Trends in Cataluña and Spain

Are You Looking for Senior Full Stack Developer Job?

Great news! is currently hiring and seeking a Senior Full Stack Developer to join their team. Feel free to download the job details.

Wait no longer! Are you also interested in exploring similar jobs? Search now: .

The Work Culture

An organization's rules and standards set how people should be treated in the office and how different situations should be handled. The work culture at KEENFOLKS adheres to the cultural norms as outlined by Expertini.

The fundamental ethical values are:

1. Independence

2. Loyalty

3. Impartiapty

4. Integrity

5. Accountabipty

6. Respect for human rights

7. Obeying Spain laws and regulations

What Is the Average Salary Range for Senior Full Stack Developer Positions?

The average salary range for a varies, but the pay scale is rated "Standard" in Cataluña. Salary levels may vary depending on your industry, experience, and skills. It's essential to research and negotiate effectively. We advise reading the full job specification before proceeding with the application to understand the salary package.

What Are the Key Qualifications for Senior Full Stack Developer?

Key qualifications for Senior Full Stack Developer typically include It / Computing / Software and a list of qualifications and expertise as mentioned in the job specification. The generic skills are mostly outlined by the . Be sure to check the specific job listing for detailed requirements and qualifications.

How Can I Improve My Chances of Getting Hired for Senior Full Stack Developer?

To improve your chances of getting hired for Senior Full Stack Developer, consider enhancing your skills. Check your CV/Résumé Score with our free Tool. We have an in-built Resume Scoring tool that gives you the matching score for each job based on your CV/Résumé once it is uploaded. This can help you align your CV/Résumé according to the job requirements and enhance your skills if needed.

Interview Tips for Senior Full Stack Developer Job Success

KEENFOLKS interview tips for Senior Full Stack Developer

Here are some tips to help you prepare for and ace your Senior Full Stack Developer job interview:

Before the Interview:

Research: Learn about the KEENFOLKS's mission, values, products, and the specific job requirements and get further information about

Other Openings

Practice: Prepare answers to common interview questions and rehearse using the STAR method (Situation, Task, Action, Result) to showcase your skills and experiences.

Dress Professionally: Choose attire appropriate for the company culture.

Prepare Questions: Show your interest by having thoughtful questions for the interviewer.

Plan Your Commute: Allow ample time to arrive on time and avoid feeling rushed.

During the Interview:

Be Punctual: Arrive on time to demonstrate professionalism and respect.

Make a Great First Impression: Greet the interviewer with a handshake, smile, and eye contact.

Confidence and Enthusiasm: Project a positive attitude and show your genuine interest in the opportunity.

Answer Thoughtfully: Listen carefully, take a moment to formulate clear and concise responses. Highlight relevant skills and experiences using the STAR method.

Ask Prepared Questions: Demonstrate curiosity and engagement with the role and company.

Follow Up: Send a thank-you email to the interviewer within 24 hours.

Additional Tips:

Be Yourself: Let your personality shine through while maintaining professionalism.

Be Honest: Don't exaggerate your skills or experience.

Be Positive: Focus on your strengths and accomplishments.

Body Language: Maintain good posture, avoid fidgeting, and make eye contact.

Turn Off Phone: Avoid distractions during the interview.

Final Thought:

To prepare for your Senior Full Stack Developer interview at KEENFOLKS, research the company, understand the job requirements, and practice common interview questions.

Highlight your leadership skills, achievements, and strategic thinking abilities. Be prepared to discuss your experience with HR, including your approach to meeting targets as a team player. Additionally, review the KEENFOLKS's products or services and be prepared to discuss how you can contribute to their success.

By following these tips, you can increase your chances of making a positive impression and landing the job!

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