> Markdown version of [/jobs/ext/2898786-senior-backend-engineer-payments-php-java-security](https://www.wearedevelopers.com/jobs/ext/2898786-senior-backend-engineer-payments-php-java-security). 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 Engineer - Payments (Php/Java) & Security - **Company:** Payxpert - **Location:** Illes Balears, Spain - **Contract:** Permanent contract - **Skills:** Java (Programming Language), PHP (Programming Language), Cyber Security, Backend, Kotlin - **Published:** September 14, 2026 - **Apply:** https://www.buscojobs.com.es/senior-backend-engineer-payments-php-java-security-en-ibiza-ID-371284468 ## About the Role PayXpert, a payments pioneer, seeks a Senior Backend Developer to design, build, and evolve backend services across PHP and Java/Kotlin stacks. You will own core components, ensure secure transaction flows and collaborate across product, QA, and release teams in an agile environment.The role demands high autonomy, strong security focus, and experience in payments or fintech. Fluency in English is required; Spanish or French are a plus. #J-*****-Ljbffr ## Description PayXpert, a payments pioneer, seeks a Senior Backend Developer to design, build, and evolve backend services across PHP and Java/Kotlin stacks.You will own core components, ensure secure transaction flows and collaborate across product, QA, and release teams in an agile environment.The role demands high autonomy, strong security focus, and experience in payments or fintech.Fluency in English is required; Spanish or French are a plus.#J-*****-Ljbffr ## Related Videos - [Migrating half a million users to a new payment service provider](https://www.wearedevelopers.com/videos/730-migrating-half-a-million-users-to-a-new-payment-service-provider) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Thinking Differently - How to Make Money from Cyber Attacks & Cheats](https://www.wearedevelopers.com/videos/745-thinking-differently-how-to-make-money-from-cyber-attacks-cheats) - [APIs and Architecture for scaling omnichannel payments](https://www.wearedevelopers.com/videos/90-apis-and-architecture-for-scaling-omnichannel-payments) - [Why Kotlin is the better Java and how you can start using it](https://www.wearedevelopers.com/videos/661-why-kotlin-is-the-better-java-and-how-you-can-start-using-it) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries) - [Backend Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/196-backend-developer-salary-in-germany-2023) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Frontend Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/195-frontend-developer-salary-in-germany-2023) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology)