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Senior Full Stack Developer Job Opening In Sanlúcar – Now Hiring OnchainLabs AG


Job description

Help Shape the Future of Digital Ownership

Help Shape the Future of Digital Ownership

At OnchainLabs , we’re building WalletTwo — the invisible, intuitive wallet infrastructure powering the next generation of digital customer experiences.

From loyalty systems and proof-of-authenticity to digital product passports, our plug-and-play solutions let brands integrate blockchain-backed tools without needing to speak “blockchain.”

We’ve already helped companies like Denario, zai, and CrowdTransfer launch secure, branded wallets — now we’re scaling fast.

And that’s where you come in.

Your Role

We’re looking for a Senior Full Stack Developer to join us in the heart of our product engine.

You’ll work closely with our CTO and collaborate across our product, design, and blockchain teams to ensure a robust, secure, and scalable infrastructure.

You’ll help us:

• Develop and maintain our backend services and deployment pipelines

• Improve architecture, scalability, and performance across our stack

• Analyze systems and processes to identify and track areas for improvement

• Support the integration of APIs, SDKs, and 3rd party systems

• Enable developers across the team with well-structured CI/CD pipelines

• Drive documentation and transparency in all deployments

What We’re Looking For

• Proven experience as a backend or full stack developer

• Strong knowledge of modern backend frameworks (Node.js, Python, or similar)

• Experience with Docker, CI/CD, and infrastructure-as-code tools

• Familiarity with cloud platforms (AWS, GCP, or similar)

• Solid understanding of databases (SQL/NoSQL)

• Highly collaborative, proactive communicator (English is a must)

• Based in a European timezone
No need for prior blockchain dev experience — we’ve got experts for that.

But curiosity about Web3 is always welcome.

Bonus Points If You

• Are located in or near Spain and can occasionally work hybrid with our local team

• Have experience with secure systems or fintech environments

• Enjoy taking ownership of dev processes and mentoring junior engineers

What You Get

• Modern, family-friendly flexibility — we believe great work happens when life works too

• 100% remote-first culture with optional hybrid setup if you are near our hub in Sanlúcar, Spain

• Join a mission-driven team building real-world products with visible impact

• Be part of a well-funded startup backed by CHF 5M and growing fast

• Work alongside highly skilled, kind people who care about product, not ego

Ready to redefine the digital customer experience with us?

Send us your LinkedIn, GitHub, or whatever you’re proud of — we’ll take it from there.

#J-18808-Ljbffr

Required Skill Profession

Informática Y Tecnología


  • 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 Sanlúcar, Spain, highlighting market share and opportunities for professionals in Senior Full roles.

86450 Jobs in Spain
86450
5 Jobs in Sanlúcar
5
Download Senior Full Jobs Trends in Sanlúcar 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 OnchainLabs AG 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 Sanlúcar. 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 Informática Y Tecnología 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.

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Interview Tips for Senior Full Stack Developer Job Success

OnchainLabs AG 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 OnchainLabs AG'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.

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

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

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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 OnchainLabs AG, 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 OnchainLabs AG'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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