Descripción de la vacante
US$45 - US$80 an hour
Spain
Backend Developer (Spain) en España is listed on Jobeax. Browse 80,000+ vacancies available.
Anyone AI is recruiting skilled Backend Developers to work on a project with a leading AI lab.
Advanced professional written proficiency in English
3-7 years of professional software engineering experience
Strong proficiency in Python and JavaScript/TypeScript; working knowledge of Java, C#, or Go
Backend or full‑stack development experience in production systems
Experience with testing frameworks (e.g., pytest, Jest, JUnit, xUnit, Go testing)
Proven ability to debug and navigate large, multi‑file codebases
Experience with code reviews, refactoring, and production migrations
Engagement: Part-time, project-based expert evaluation work
Work Type: Remote
Contributors will design and evaluate realistic software engineering tasks, including bug resolution, feature implementation, refactoring/migration, and test generation. Work includes both creating complex coding scenarios and reviewing peer submissions for quality and accuracy.
This is a project-based consultant role. Consultants will be paid on a per-project basis; hourly rates are estimates based on anticipated completion time. Consultants control their own schedule, provide their own tools, and may simultaneously provide services to other vendors/employers (subject to those vendors' allowances).
Contributors will:
Design and implement multi-file coding tasks across bug fixing, feature development, refactoring, and testing
Write clear natural-language specifications and reference implementations
Develop and extend unit and integration test suites
Review peer-generated tasks for correctness, clarity, and realism
Identify edge cases, ambiguities, and potential failure modes
Ensure alignment between specifications, code, and expected outputs
High-quality, production-realistic coding tasks
Complete and correct reference implementations
Robust test coverage and validation artifacts
Structured, actionable peer review feedback
Vacantes similares
US$45 - US$80 an hour
About the role Anyone AI is recruiting skilled Backend Developers to work on a project with a leading AI lab. What you'll do Contributors will: - Design and implement multi-file coding tasks across bug fixing, feature development, refactoring, and testing - Write clear natural-language specifications and reference implementations ...
Spain
Hybrid
About the role Backend Java Developer - Senior - EY GDS Spain - Hybrid This position provides the opportunity to work in an international environment and collaborate with leading fi nancial institutions across Europe and globally. You will be part of high-performing teams delivering innovative digital transformation solutions ...
Spain
Found By Few
90000 €/año
Role: Senior Backend Developer Salary: Up to €90,000 Industry: B2C HealthTech Location: Remote Europe (Spain, Portugal, Germany or the UK) Why join? This is a chance to build at real scale on an app that millions of people use every day. You'll be working on the backend systems that keep everything running smoothly. The ...
Spain, Vitoria
Found By Few
90000 €/año
Role: Senior Backend Developer Salary: Up to €90,000 Industry: B2C HealthTech Location: Remote Europe (Spain, Portugal, Germany or the UK) Why join? This is a chance to build at real scale on an app that millions of people use every day. You'll be working on the backend systems that keep everything running smoothly. The ...
Spain, Valencia
Found By Few
90000 €/año
Role: Senior Backend Developer Salary: Up to €90,000 Industry: B2C HealthTech Location: Remote Europe (Spain, Portugal, Germany or the UK) Why join? This is a chance to build at real scale on an app that millions of people use every day. You'll be working on the backend systems that keep everything running smoothly. The ...
Spain
225k
Our goal is to strengthen the brand in Spain. Backend Developer! Java 8, 11 Spring (Spring-Boot, Spring-Batch, MVC) Junit, Mockito, Wiremock, MockMVC JPA, Oracle, JDBC Experience working with Azure Devops Message Brokers (Kafka, RabbitMQ) Database Migration Tool: Liquibase/Flyway Static code analysis tools (Sonar, PMD, ...
Spain, Granada
Mentor Talent Acquisition
Back End Developer - Python Mentor Talent Acquisition Huelva, comarca metropolitana de huelva (comarca); provincia de huelva; andalucía, Spain Descripción del trabajo Remote option available with quarterly office visits for one week in Vienna. About the company The team is ambitious and international, working on an exciting ...
Spain, Huelva
Intellias
... high-performance applications, and innovation, ensuring a seamless customer experience across platforms. We are looking for a https://jobeax.com/link/co8fHcezWERIb6h9 Developer to be a key player in building and optimizing backend services that power the platform. You will work on critical projects, including integrating a new feed ...
Spain
€55,000 - €80,000 a year
About the role We invite you to join our innovative technology company, a leading provider of digital transformation solutions in Spain with over 20 years of industry experience. We are seeking a Senior Backend Developer to strengthen our engineering team and contribute to cutting-edge projects that serve major enterprises ...
Spain, Barcelona
€50,000 - €75,000 a year
... engineering team. We are in charge of creating, developing, improving, and maintaining all Fever services so that more people can have an amazing experience. Location: Spain - 100% Home office friendly What you'll do - You'll be confidently collaborating and delivering at full speed. You will: - Design and implement end-to-end features ...
Spain
Intellias
... focused on scalability, high-performance applications, and innovation, ensuring a seamless customer experience across platforms. We are looking for a Senior Java Developer to be a key player in building and optimizing backend services that power the platform. You will work on critical projects, including integrating a new feed ...
Spain
€55,000 - €80,000 a year
About the role We are seeking an experienced Senior Backend Developer to join our innovative technology team in Spain. This is a fantastic opportunity to work with one of the leading Spanish IT companies, boasting over 28 years of expertise and an exceptional portfolio of technological solutions for enterprise clients. ...
Spain, Barcelona
€65,000 - €95,000 a year
About the role We are seeking a Senior Backend Developer to join our growing engineering team in Spain. This is a Full-time, on-site position where you will architect and develop scalable cloud-based solutions for our enterprise clients. You will lead the design and implementation of microservices, work with modern cloud ...
Spain, Madrid
Michael Page España
€40,000 - €45,000 a year
... helping to digitalize critical processes related to worker safety and equipment. Their product already has more than 300,000 users and continues to grow both in Spain and internationally. Summary We are looking for a Backend Developer (.NET) to join the product team of a consolidated SaaS platform that serves large national ...
Spain, Madrid
Have the right to work in Spain
... that supports your professional development and offers working on a mission-critical SaaS suite? That, and more, is what we offer you. We are looking for Java Developers who want to work with the latest techniques and want to continue to challenge themselves. Siemens is operating a Software Development Center in Spain, Valencia ...
Spain
€65,000 a year
... with common distributed systems concepts (e.g., scalability, multi-tenancy, HA). - Have professional experience with Golang and be willing to work across both backend service and application code - Care deeply about developer and user experience and the quality of the products that you work on - Have some experience contributing ...
Spain
About the role We're looking for an SAP HANA Cloud Developer to join our team in Spain in a remote working mode. In this role, you will be responsible for designing, developing and optimizing data models and backend solutions within SAP HANA Cloud to support complex business processes across manufacturing, engineering and ...
Spain
About the role We are looking for a Java Backend Developer with experience in developing microservices-based applications, passionate about creating scalable, secure, and high-performance solutions. You will be part of a strategic project for one of our main clients in the banking sector, participating in the design and ...
Spain, Madrid
About the role We are looking for an experienced Backend Java/Spring Boot Developer with Camunda 8 to join our growing engineering team. In this role, you will be responsible for designing, developing, and maintaining scalable backend solutions while implementing and optimizing business processes using Camunda 8 . You will ...
Spain, Málaga