> Markdown version of [/jobs/ext/1927810-senior-backend-developer](https://www.wearedevelopers.com/jobs/ext/1927810-senior-backend-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Backend Developer - **Company:** Biocatch - **Location:** Madrid, Spain - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Big Data, Biometrics, Cloud Engineering, Continuous Integration, Python (Programming Language), Software Engineering, Web Services, Backend, Cybercrime, Microservices - **Published:** August 5, 2026 - **Apply:** https://www.buscojobs.com.es/senior-backend-developer-en-madrid-ID-365488832 ## About the Role BioCatch, the market leader in behavioral biometrics, is looking for a back-end developer to join our dynamic team., At least 5 years of experience in developing software for large-scale systems. At least 3 years of experience with Python or equivalent backend development experience, with a strong focus on building scalable and maintainable APIs and services. Experience in cloud architecture and microservices. Experience working on a CI/CD dockerized environment - Advantage. Leading technical projects - Advantage. Soft skills Responsible, well-organized, self-learning, and a team player. Capable of leading large tasks. Self & fast learning capabilities. Independence and persistence. Willing to handle a variety of unfamiliar tasks. Hebrew Proficiency - an advantage. #J-*****-Ljbffr ## Description Are you an experienced backend developer passionate about using your skills to combat cybercrime and fraud?BioCatch, the market leader in behavioral biometrics, is looking for a back-end developer to join our dynamic team.As a Senior backend developer at BioCatch, you will work with a team of intensely curious individuals dedicated to innovation and growth.You will be responsible for building core services and APIs that can handle high volumes of real-time traffic and meet strict SLA response times.You will also handle complex scenarios involving the collection, aggregation, and research of big data.Join us at BioCatch and make a real difference in the fight against cybercrime and fraud.Location: Barcelona, Spain (Hybrid work arrangements)RequirementsAt least 5 years of experience in developing software for large-scale systems.At least 3 years of experience with Python or equivalent backend development experience, with a strong focus on building scalable and maintainable APIs and services.Experience in cloud architecture and microservices.Experience working on a CI/CD dockerized environment - Advantage.Leading technical projects - Advantage.Soft skillsResponsible, well-organized, self-learning, and a team player.Capable of leading large tasks.Self & fast learning capabilities.Independence and persistence.Willing to handle a variety of unfamiliar tasks.Hebrew Proficiency - an advantage.#J-*****-Ljbffr ## Related Videos - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Alibaba Big Data and Machine Learning Technology](https://www.wearedevelopers.com/videos/37-alibaba-big-data-and-machine-learning-technology) - [Biometric Phone Chargers, $40m Domain Names & AI Movies Winning Awards - Peter Kröner](https://www.wearedevelopers.com/videos/1810-biometric-phone-chargers-40m-domain-names-ai-movies-winning-awards-peter-kroner) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) - [Behind the Curtain: How Recruiters Shortlist Devs in an AI-Driven Market and How You Stand Out](https://www.wearedevelopers.com/videos/100229-behind-the-curtain-how-recruiters-shortlist-devs-in-an-ai-driven-market-and-how-you-stand-out) ## Related Articles - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe) - [The 7 Most Popular Backend Frameworks for Developers](https://www.wearedevelopers.com/magazine/403-the-7-most-popular-backend-frameworks-for-developers) - [20 Essential Tools For Backend Development](https://www.wearedevelopers.com/magazine/218-20-essential-tools-for-backend-development)