Full-Stack Software Engineer

Join to apply for the Software Engineer role at Adaptify SEO Join to apply for the Software Engineer role at Adaptify SEO Join our AI-first team to build cutting-edge SEO automation tools that help agencies scale their operations and deliver magic-like results for their clients. About Adaptify SEO We see the potential for AI to replace boring, repetitive jobs, and are bringing this in practice by helping marketing agencies deliver SEO fully on autopilot. As an AI-first company, we use LLMs everywhere (we developed RAGs before they were called that way). We have a simple and modern stack, ship fast, and work on cutting-edge product features. If you want to join a company and really learn how to really make AI/LLM-powered apps that make people’s lives easier, Adaptify SEO is the right fit for you. We also have collected hundreds of data points, with latent opportunities for data insights, so you could be the person to build powerful analytics and turn data into learnings. About This Role We are looking for a hands-on, quick-learning dev who is passionate about turning the latest AI developments into a useful and powerful product that makes our customers feel like they have magic powers. Your job will be to make our tech product the best it can be. You'll have the opportunity to grow into owning key parts of our infrastructure and becoming a full-stack engineer. We'll fully support you in developing your skills and pursuing your passions. There's lots to do, from working with LLMs to backend development and DevOps architecture. We are a fully async organisation, we are based in three continents, and you are truly able to set your own working hours. We don't do tickets or stand ups, we have a work environment that is focused on productivity and no BS with great documentation and the occasional high-impact meeting. Who You Are You're looking to be an early tech hire at a fast-growing and profitable startup, and have an ownership mentality and the ability to come up with innovative ideas autonomously You are excited about having direct influence on our tech architecture, and the opportunity to work on tech that makes a difference for our business and is actively used by our customers You're a fast learner. You don't need to be a super-experienced dev or super familiar with our stack, we bet on talented builders You're a problem solver who likes digging into stuff and looking at it from different angles, to create powerful new features or fix high-impact bugs You have 3 years of professional experience as a software engineer. Stack is less important, but you know the ropes of contributing to a company with quality code You're passionate about working with AI and solving the novel challenges that come with it, and its fuzziness and unpredictability compared to old-school code You're comfortable working autonomously, taking responsibility for delivering larger tech projects, and don't hesitate to ask for help where needed What the Job Involves Build out our Python FastAPI backend with new features that combine LLMs (LangChain), prompt engineering, and data in ways that weren't possible just a few years ago. Architect code and Firebase data structures in accordance with our business logic Manage and monitor our backend in GCP and LangSmith Python FastAPI Firebase GCP LangChain LangSmith What We Offer If you need the tech, you'll get it Honesty, no BS, a happy, worry-free working culture We pay competitively and have a great bonus structure Generous paid holiday allowance Application Process Here is the outline of the whole application process, so you know what to expect: Fill in and submit the application form. Several video interviews (between 15-60 minutes long) where we try to get to know you better and give you a chance to get to know us, as well as talk about your previous experiences and future goals. If that goes well, we will make an offer and continue working together! Please note: Recruiters and agencies are requested not to contact Adaptify SEO directly. Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Job function Engineering and Information Technology Industries Technology, Information and Internet Referrals increase your chances of interviewing at Adaptify SEO by 2x Get notified about new Software Engineer jobs in Spain . 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Location: España, ES

Posted Date: 11/17/2025