> Markdown version of [/jobs/ext/1357424-backend-engineer](https://www.wearedevelopers.com/jobs/ext/1357424-backend-engineer). 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). --- # Backend Engineer - **Company:** Bark - **Location:** Madrid, Spain (Remote available) - **Salary:** €50,000.0 - €70,000.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, JavaScript (Programming Language), Application Programming Interfaces (APIs), C++ (Programming Language), Mobile Application Development, Digital Assets, Revision Control Systems, Python (Programming Language), PostgreSQL, Node.Js, Open Source Technology, Queueing Systems, RabbitMQ, Redis, Software Engineering, Delivery Pipeline, Backend, Information Technology, Apache Kafka, Non-relational Database, Graphql, Front End Software Development, Api Design, Golang, Programming Languages - **Published:** July 20, 2026 - **Apply:** https://www.adzuna.es/contact-us.html ## About the Role + Bachelor or advanced degree in Computer Science or equivalent. + 5+ years working as a Backend Engineer. + Fluent written and speaking English skills. + Spent lots of quality time coding, deeply learning the powerful idioms and important idiosyncrasies of multiple. programming languages and their ecosystems. We like to code mostly in JavaScript (node.js), Python, Golang and C/C++. + Strong understanding of relational (preferably PostgreSQL) and/or non-relational databases (e.g. Redis). + Strong understanding of web semantics. + Knowledge of revision control systems. + Basic knowledge of standard development pipelines, including build and other automation tools. + Excellent communication skills and a team player with the ability to work in cross-functional teams, and with a great attitude, o Experience in developing APIs for other products you've worked on. o Developing software interacting with message queues (e.g. Kafka, NSQ, Pulsar or RabbitMQ). o Experience in integrating APIs from other services providers. o Proven record of having worked with performance budgets. o Fluency in cryptocurrencies or other digital assets as they are core to our business. o Community talks, certifications, and/or blog posts on your interests and research. o Open source project contributions of any kind, such as tools developed to solve specific problems you've had or fixing issues on existing projects. ## Description Cross Border Talents España €50,000 - 70,000 per year FÁCIL APLICACIÓNREMOTO Inscribirse en esta oferta You will be designing and building services with three core principles in mind: maintainability, performance, and security. If you are excited about high-availability requirements, scalability problems, automated workflows, infrastructure orchestration, queueing systems, APIs and protocols like GraphQL and gRPC, our client is keen to hear from you. Responsibilities : + Building the most powerful, easy to use payment platform in the world. + Delivering new features and enhancements to our platform. + Working closely with the Frontend and Mobile Engineering teams to integrate frontend UI. + Collaborating with product managers, designers, engineers and other project stakeholders throughout the software development life cycle (planning, design, implementation, deployment and support). + Helping the team keep up-to-date with the tech stack ecosystem. + Writing high quality code with performance and scalability in mind. ## Related Videos - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [Go with the Flow: Stop the Leaks Before Your Memory's a Waterfall!](https://www.wearedevelopers.com/videos/100073-go-with-the-flow-stop-the-leaks-before-your-memory-s-a-waterfall) - [Putting the Graph In GraphQL With The Neo4j GraphQL Library](https://www.wearedevelopers.com/videos/257-putting-the-graph-in-graphql-with-the-neo4j-graphql-library) - [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) - [Event based cache invalidation in GraphQL](https://www.wearedevelopers.com/videos/433-event-based-cache-invalidation-in-graphql) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [The 7 Most Popular Backend Frameworks for Developers](https://www.wearedevelopers.com/magazine/403-the-7-most-popular-backend-frameworks-for-developers) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers)