Senior Software Engineer (Python/GCP)

Job description

Hi, We’re Sundogs.

We’re using AI and human creative expertise to transform video advertising.

Working with the biggest brands in the world, we’re building a way to measure creative effectiveness – helping creators everywhere use AI to tell better, more creative stories, and make their video ads not just better, but revolutionary.

Our team is a global collection of Cannes-winning creatives, ex-Googlers, cutting edge data scientists, and start-up entrepreneurs, and we're poking at the future with curiosity and delight.

We’re looking for a Senior Software Engineer who’s a product-minded, problem solver at heart, and excited to build the next generation of creative intelligence tools.

The Opportunity

We’re looking for a Senior Software Engineer who’s excited to build things from the ground up: someone who can think strategically, move fast, and care deeply about quality.

You’ll be a key player in taking our product from MVP to scalable platform, helping global brands get real results from their creatives.

This is not a narrowly scoped role.

You’ll own critical systems end-to-end, and work closely with the data and product teams to translate creative ideas into production-level software.

This role is fully remote and candidates from all geographies are welcome to apply.

Please note application instructions.

Resumes submitted only via LinkedIn will not be considered.

You’ll Thrive Here if You:

• Are energized by ambiguity and enjoy bringing structure where it doesn’t yet exist
• Collaborate well with non-technical teammates (creative, product, strategy)
• Want to work directly with early adopters who are leading global brands and see your work in the wild, fast
• Want to shape not just what we build, but how we build it: code,culture, process, and technical direction

What You'll Do

• Improve and scale our Ad Scoring API based on client use cases
• Design & Build scalable data systems and pipelines for creative and performance signals
• Build for scale: robust, scalable systems with great monitoring, alerting, and failure-handling
• Refine our LLM pipelines (OpenAI, Gemini, etc.) for performance and reliability
• Collaborate on creative uses of AI across the stack, from scoring to benchmarks

Technical Enablement & Collaboration

• Work directly with early API clients to support technical onboarding and create feedback loops to integrate into tech and product roadmaps
• Collaborate across teams to make technical work clear and actionable
• Bring curiosity and empathy to every interaction—especially when translating technical concepts for non-technical teammates

What We're Looking For

• 7+ years backend engineering experience, ideally with some experience in fast-paced, high ambiguity environments (start-up or other)
• Deep Python experience and fluency and production experience in GCP (or other major cloud provider)
• Familiarity with LLMs or data-intensive systems at scale, data engineering experience is a plus
• Proven ability to ship scalable, reliable, production-grade systems
• Clear, concise, curious and warm communicator, able to make technical concepts simple and accessible
• Empathetic collaborator, especially when working with non-technical peers, who thrives on feedback, iteration, and shared success

Our Stack:

What We Offer

• Early equity in a fast-growing start-up
• Flexible, remote-first work environment.
  
  
• Direct access to founding team, clients, and creative challenges
• A culture that values curiosity, candor, and craftsmanship

Note: Our team is fully remote and distributed within EST-CET timezones.

While we are distributed across timezones, workdays are local hours (with occasional/rare exceptions).

Application Instructions

Submit your resume and prompt responses to

We're not looking for polish, we're looking for clarity; we’re interested in your thinking process, not just the technical details.

Resumes without answered prompts will not be considered.

In 250 words or less, answer the following question:

Tell us about a time you re-designed or refactored a system (e.g., an API, data pipeline, architecture, or core service).

What was the original problem or limitation?

What changes did you make and why?

What was the result?

In 250 words or less, answer the following question:

Pick a technical system, tool, or project you’ve worked on, like an API, data pipeline, ML model, or cloud architecture, and explain it clearly and simply, as if you were describing it to a teammate in marketing or creative.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Marketing Services

Referrals increase your chances of interviewing at Sundogs Creative by 2x

Get notified about new Senior Software Engineer jobs in Spain .

Senior Full-Stack Software Engineer (Remote)

Greater Madrid Metropolitan Area 1 month ago

Greater Barcelona Metropolitan Area 1 month ago

Senior Software Engineer - Finance Domain

Manager, Software Engineering (Repayments Engineering)

Senior Software Quality Assurance Specialist

Engineering Manager - In-store Payment – Remote-First

Madrid, Community of Madrid, Spain 6 days ago

Bilbao, Basque Country, Spain 4 months ago

Madrid, Community of Madrid, Spain 3 weeks ago

Senior Software Engineer (Frontend) - Remote in Spain

Madrid, Community of Madrid, Spain 2 days ago

Madrid, Community of Madrid, Spain 1 month ago

Madrid, Community of Madrid, Spain 9 months ago

Senior Software Engineer - U.S. or EU (remote)

Spain $150,000.00-$195,000.00 8 months ago

Salamanca, Castilla and Leon, Spain 2 years ago

Senior Software Engineer - Age of Empires (Remote)

Madrid, Community of Madrid, Spain 5 days ago

Senior Developer – Full Remote – EU Institutions

Bilbao, Basque Country, Spain 2 months ago

Madrid, Community of Madrid, Spain 4 months ago

Madrid, Community of Madrid, Spain 3 weeks ago

Madrid, Community of Madrid, Spain 6 months ago

We’re unlocking community knowledge in a new way.

Experts add insights directly into each article, started with the help of AI.

Required Skill Profession

Informática Y Tecnología