Senior Software Engineer

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.Es posible que un gran número de candidatos se presenten a este puesto, así que asegúrese de enviar su CV y su solicitud lo antes posible.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 OpportunityWe’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 existCollaborate 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, fastWant to shape not just what we build, but how we build it: code,culture, process, and technical directionWhat You'll DoImprove and scale our Ad Scoring API based on client use casesDesign & Build scalable data systems and pipelines for creative and performance signalsBuild for scale: robust, scalable systems with great monitoring, alerting, and failure-handlingRefine our LLM pipelines (OpenAI, Gemini, etc.) for performance and reliabilityCollaborate on creative uses of AI across the stack, from scoring to benchmarksTechnical Enablement & CollaborationWork directly with early API clients to support technical onboarding and create feedback loops to integrate into tech and product roadmapsCollaborate across teams to make technical work clear and actionableBring curiosity and empathy to every interaction—especially when translating technical concepts for non-technical teammatesWhat We're Looking For7+ 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 plusProven ability to ship scalable, reliable, production-grade systemsClear, concise, curious and warm communicator, able to make technical concepts simple and accessibleEmpathetic collaborator, especially when working with non-technical peers, who thrives on feedback, iteration, and shared successOur Stack:What We OfferEarly equity in a fast-growing start-upFlexible, remote-first work environment.Direct access to founding team, clients, and creative challengesA culture that values curiosity, candor, and craftsmanshipNote: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 InstructionsSubmit 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? xsgfvud 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 levelSeniority level Mid-Senior levelEmployment typeEmployment type Full-timeJob functionJob function Engineering and Information TechnologyIndustries Marketing ServicesReferrals increase your chances of interviewing at Sundogs Creative by 2xGet notified about new Senior Software Engineer jobs inSpain .Senior Full-Stack Software Engineer (Remote)Greater Madrid Metropolitan Area 1 month agoGreater Barcelona Metropolitan Area 1 month agoSenior Software Engineer - Finance DomainManager, Software Engineering (Repayments Engineering)Senior Software Quality Assurance SpecialistEngineering Manager - In-store Payment – Remote-FirstMadrid, Community of Madrid, Spain 6 days agoBilbao, Basque Country, Spain 4 months agoMadrid, Community of Madrid, Spain 3 weeks agoSenior Software Engineer (Frontend) - Remote in SpainMadrid, Community of Madrid, Spain 2 days agoMadrid, Community of Madrid, Spain 1 month agoMadrid, Community of Madrid, Spain 9 months agoSenior Software Engineer - U.S. or EU (remote)Spain $150,000.00-$195,000.00 8 months agoSalamanca, Castilla and Leon, Spain 2 years agoSenior Software Engineer - Age of Empires (Remote)Madrid, Community of Madrid, Spain 5 days agoSenior Developer – Full Remote – EU InstitutionsBilbao, Basque Country, Spain 2 months agoMadrid, Community of Madrid, Spain 4 months agoMadrid, Community of Madrid, Spain 3 weeks agoMadrid, Community of Madrid, Spain 6 months agoWe’re unlocking community knowledge in a new way. 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