24.809 Ofertas de Back-end en España

About Pepper Group Spain

Pepper Group Spain is investing in the development of a loan servicing platform and broader eco system with the aspiration to provide the modular elements of the platform to internal and third party customers on a SaaS basis.

About the role

The Backend Systems Developer is a key new appointment to Project Prism, who will work with the dedicated team to build the platform for both web and mobile access.

The Backend Systems Developer will be a can do, high achieving individual who will bring their product and domain expertise to the product, having experience of working with teams to build high quality enterprise level applications and have a passion for technology.

Location: Madrid

Main Responsibilities

• Development and maintenance of the new software platform.
• Design of a scalable and highly configurable cloud native solution targeting multiple geographic jurisdictions and asset types.
• Ensure all developments fit within the overall system architecture and design strategy, and make sure code is of a consistent and appropriate standard.
• Manage and maintain the company codebase using industry best practice to provide full audit and control capabilities.
• Work with all stakeholders to best prioritise system developments and deliver to agreed release schedules.
• Work closely with the test team to design and implement robust automatic testing in an agile fashion.
• Work as part of the Scrum team to analyse and estimate sprint items.
• Keep abreast with Testing best practices and new trends.

Your skills

• Excellent C# skills (WebAPI, ASP.NET Core), SQL Server, Azure SQL and NoSQL (CosmosDB) skills.
• Experience on API based systems: definition, implementation, and management.
• Good understanding of front-end technologies, specifically Angular and the supporting framework tools.
• Experienced in cloud-native applications (preferably Azure) with good understanding of modular design and asynchronous communication.
• Familiarity with IaaS, PaaS and IaC technologies – Kubernetes, Terraform, Ansible.
• Strong advocate of CI/CD principles familiar with the Azure DevOps stack.
• Competency in best practices and techniques – BDD, design patterns, SOLID principles, DDD.
• Experience in the Financial Services industry is desirable.
• Interest in Infrastructure Engineering is desirable.

Our benefits

• Private health insurance + dental program for all employees from 3rd month.
• Tax benefits in services such as day care, commuting cost, health, and food.
• Life insurance from day 1 for all employees.
• Flexible hybrid working model.
• Healthy snacks at the office.
• Wellness program with workshops and webinars.
• Team building activities such as Christmas, Summer event, Football team.
• Voluntary initiatives (Ningún Niño sin sonrisa, Ningún niño sin mochila, Fundación Aladina, Asociación Española Ayuda contra el Cancer, Fundación Prader Willi, Guillermo Prieto Ciclista, Bancos de Alimentos)

Pepper’s values and culture

Our mission is to help people succeed. Our clients, our customers, our employees. Our Values are ‘Can do’, ‘Balanced’ and ‘Real’.

Pepper Advantage’s values support our vision, shape our culture and define how we interact with other employees and the attitudes we adopt towards our customers and clients. The values of Pepper Advantage support the organisation’s mission statement.

Pepper Advantage’s unique outcome focused corporate culture aims to deliver fairness and value for clients and customers, consistently exceeding expectations in all measurable performance areas.

Pepper is an equal opportunities employer.

Role Profiles are subject to change in line with business needs.

Con un equipo de aproximadamente 10.000 profesionales en 60 ciudades de Europa, adesso es uno de los principales proveedores de servicios IT en el mercado de habla alemana.

Para nuestra oficina en adesso Spain , buscamos un Back-End Developer con experiencia en Java para incorporarse a un equipo internacional en proyectos de desarrollo de aplicaciones web robustas y escalables.

¿Qué valoramos?

• Experiencia con arquitecturas de microservicios.
• Dominio de Java y Spring (Spring Boot, Spring Security, Spring Data.).
• Buen nivel en testing (JUnit, Mockito) y prácticas de CI/CD.
• Familiaridad con metodologías ágiles (Scrum, Kanban).
• Capacidad para comunicarse eficazmente en inglés, en entornos técnicos internacionales.

¿Qué ofrecemos?

• Contrato indefinido con salario competitivo y seguro médico privado.
• Modelo híbrido de trabajo en Madrid (zona Paseo de la Castellana).
• Participación en proyectos internacionales.
• Organización ágil, con procesos de trabajo optimizados.
• Plan de desarrollo profesional personalizado: formación técnica, habilidades blandas, certificaciones y aprendizaje de idiomas.

Si te apasiona el desarrollo back-end y estás preparad@ para dar el siguiente paso en tu carrera, ¡queremos conocerte!

Únete a nuestro equipo en adesso Spain y forma parte de un entorno dinámico, innovador y en crecimiento.

In compliance with the current regulations on the Protection of Personal Data, you are informed and, if you send us your CCVV, send us communications with your data or contact us with personal information, you consent to the processing of your data until you communicate otherwise by ADESSO SPAIN CONSULTORÍA Y SOLUCIONES TECNOLÓGICAS S.L.U., in order to participate in recruitment processes and HR management.

The legitimate basis of the treatment is the consent of the user and the pre-contractual relationship between the parties. The data provided are necessary in order to participate in any personnel selection procedure.

You may exercise your rights of access, rectification, deletion, opposition, limitation of processing, data portability and not to be subject to automated individualized decisions (including profiling), by sending a request with subject “Data Protection”, to the address: Avda. De la Vía Augusta, 85-87. 08174. Sant Cugat del Vallès, Barcelona, indicating in any case, the contact details and attaching a copy of your identity document. If you consider that your rights have been violated, you can file a complaint with our Data Protection Officer: Grupo Datcon Sur S.L.U. or with the Spanish Data Protection Agency (

Location:  Remote (EU/US friendly time zones) | Full-time

At Alinia AI , we help enterprises in finance, insurance, and healthcare deploy generative AI safely and responsibly. Our platform provides alignment guardrails and compliance monitoring to ensure AI systems are trustworthy.

We’re hiring a Backend Engineer  to design and scale privacy-first backend systems, APIs, and services that meet enterprise-grade security and compliance standards.

What you’ll do:

• Build and maintain backend APIs and services.
• Implement security & privacy safeguards (SOC2, GDPR, ISO 42001).
• Support SaaS, VPC, and on-prem deployments.
• Collaborate across engineering, ML, and compliance teams.

What we’re looking for:

• 3–5+ years backend engineering experience.
• Strong Python (FastAPI/Flask/Django) + PostgreSQL.
• Cloud + Kubernetes/Docker.
• Data security expertise (encryption, IAM, logging).

Bonus: VPC/on-prem experience, regulated industries, gRPC/distributed systems.

Remote | Competitive comp + equity | High-impact role

To apply send your resume to 

Job Title: Backend Engineer

Location: Barcelona (on-site)

About the job:

We are an ambitious and rapidly evolving cybersecurity company based in Barcelona and we are seeking a skilled and motivated Backend Engineer to join our team. As a core part of our backend development efforts, you will work on building and maintaining a scalable, microservices-based architecture. You will collaborate closely with cross-functional teams to design, develop, and deploy robust backend systems, ensuring optimal performance and responsiveness.

What you will do:

• Design, develop, and maintain backend services using modern technologies
• Work with SQL and NoSQL databases
• Develop and deploy containerized applications using Docker
• Implement and maintain microservices architecture
• Improve and debug an already running system to ensure stability and performance
• Optimize system performance and troubleshoot production issues
• Collaborate with Frontend developers, DevOps, and other stakeholders to deliver high-quality solutions
• Ensure high-quality code standards and enhance code quality through testing and peer reviews
• Take ownership of end-to-end development processes, including requirement analysis, design, implementation, testing, and deployment

What you will bring:

• 5+ years of experience in backend development, with a proven track record of delivering high-quality, scalable solutions
• Strong, hands-on programming skills with a focus on Python
• Proficiency in C programming
• Experience with internal OS development
• Familiarity with DevOps practices and on-prem infrastructure is a plus. Experience with microservices architecture
• Strong understanding of system architecture principles, with the ability to design and maintain efficient, scalable backend systems
• Proficiency in both SQL and NoSQL databases (e.g., PostgreSQL, MongoDB)
• Hands-on experience with Docker for containerization
• Working knowledge of Linux OS
• Ability to work independently and take ownership of tasks from start to finish

What we offer:

For us, people come first and our highly experienced team of professionals is bringing to life their vision of the future of cybersecurity. If you Join us, you will have the unique opportunity to be a part of our growing and ambitious start-up.

You will enjoy:

• Competitive salary in the sector (based on your experience/skills)
• Private health insurance
• Food allowance and flexible compensation
• Flexible office working hours
• Beautiful office in Barcelona
• Fully stocked kitchen (coffee, organic fruits, snacks, and beverages)
• Team-building events and professional growth opportunities

We are proud to be an equal opportunity employer and consider all qualified applicants for employment without regard to race, colour, religion, age, sex, sexual orientation, gender, gender identity, national origin, disability, veteran status or any other legally protected characteristic.

About Corner

Corner is where athletes take control of their audience and unlock new ways to grow, earn, and connect. We're building the platform for athletes to own their community and monetize directly through subscriptions, sponsorships, donations, and more.

In a world where algorithms decide who sees what, athletes often get stuck playing by someone else's rules. We're changing that giving athletes the tools to build independent communities, generate recurring revenue, and strengthen their fan relationships.

If you believe athletes deserve to own their platform, you'll be right at home here.

Role Description

Help us build the backend that lets athletes earn directly from their fans. Join us early to build and scale a solid platform from the ground up.

What you'll do

• Own parts of our Django/DRF services and APIs end-to-end
• Model core domains: users/creators, subscriptions & payouts, content, fan CRM, analytics
• Ship integrations (Stripe Connect, AWS S3, Mux), webhooks, and background jobs
• Raise the bar on performance, security, testing, and observability
• Collaborate with product to turn fuzzy ideas into shipped features—fast

You

• 3–6+ yrs Python/Django, with a builder's mindset and pride in your craft
• Fluency in data modeling, transactions, idempotent webhooks, and API design
• Pragmatic about tests and monitoring; you ship small, often, and safely
• Nice to have: real-time features, payments at scale, or analytics pipelines

Project Description

Platform for management, execution, and creation of AI agents as trusted members of your workforce.

As a Software Engineer, you will be instrumental in designing, developing, and maintaining scalable backend systems, ensuring AI products meet the highest standards. This role demands a blend of creativity, technical expertise, and a passion for innovation, as you will be at the heart of building the future of enterprise AI systems.

Responsibilities

• Develop high-quality, scalable, and secure backend services
• Collaborate with frontend developers and product teams to integrate AI capabilities
• Engage in all technical aspects without reliance on DevOps support
• Uphold a culture of high efficiency, creativity, and quality
• Make fast, data-driven decisions and demonstrate ownership
• Commit to team goals and ensure high availability for collaboration
• Contribute to system architecture design and implementation
• Optimize applications for maximum speed and scalability.

Skills Required

• Proficient Backend Engineer
• Technology agnostic (our primary is Python and )
• Agentic AI experience is a plus
• System design and architecture skills
• API integration
• 10+ years of experience

Please note
that only candidates whose profiles closely match our requirements will be contacted.

Company Description

BRM Labs is a boutique venture and digital strategy consulting studio. We support companies and universities with digital marketing and tech solutions, while also developing our own projects in consumer apps and real estate tech. Our mission is to drive innovation and growth for our partners through cutting-edge technology and strategic insights. We are based in Madrid and are committed to creating impactful digital solutions.

Role Description

We are looking for a Back-End Developer to join BRM Labs. This is a full-time role with flexible location (remote-friendly).

The Back-End Developer will be responsible for designing, developing, and maintaining server-side applications. Day-to-day tasks include writing clean code, optimizing database interactions, ensuring system functionality, and collaborating with front-end and mobile developers to integrate user-facing elements with server-side logic. Additionally, you will be involved in code reviews, debugging, and continuous improvement of the software development process.

Salary: €3,500/month

Qualifications

• Proficiency in Back-End Web Development and Software Development
• Strong understanding of Object-Oriented Programming (OOP) principles
• Solid programming skills in relevant languages (e.g., Java, Python, Ruby)
• Experience with mobile applications (iOS/Android) and APIs
• Experience with database management and server logic
• Strong communication and teamwork abilities
• Excellent problem-solving skills and attention to detail
• Fluent in Spanish (required)
• Experience with Front-End Development is a plus

Build cutting-edge cloud-native software for the networks of tomorrow.

At
Kenmei,
we're on a mission to build cloud-native solutions to automate telecom network operations. As part of our
software development team
, you will build and own solutions that empower operators to make smarter, faster decisions at scale.

We decode billions of data points using big data architectures and advanced algorithms to optimize performance and simplify network complexity.

We're growing fast and looking for a
Senior Back-End Developer
to join our product team and help build the systems behind our advanced platform for telecom operators.

If you're passionate about clean architecture, high-performance Python, and want to work on cloud-native, big data solutions that impact millions of people daily, let's talk.

What you'll do

• Architect and build new features for our cloud-native network automation platform.
• Write clean, reusable, and well-documented Python/Django code.
• Improve backend performance and scalability for high-volume data processing.
• Work with our ML engineers and product owners to ship impactful features.
• Increase test coverage and contribute to CI/CD pipelines.
• Profile and optimize performance bottlenecks.
• Design and implement REST APIs.

What you'll bring

• 5+ years of back-end development experience.
• Solid understanding of SQL and relational databases.
• Experience with REST APIs, design patterns, unit testing, and CI/CD.
• Strong Python & Django expertise.
• Familiarity with Agile methodologies.
• Good English communication skills.

Bonus points for experience with
: Docker, Selenium, SQLAlchemy, React Native, Typescript, GIS data, or test automation frameworks.

Why Kenmei

• Impactful work
  : Build software that automates networks serving millions of users daily.
• Cutting-edge technology
  : Work with cloud-native architectures, big data technologies, and advanced automation systems.
• Hybrid & flexible:
  Work 2 days in our Valencia office, 3 from home.
• Workations:
  Work up to 4 weeks every year from anywhere in the world.
• Continuous learning:
  4 hours every month available for learning and growth during working hours.
• Private health insurance:
  Comprehensive coverage for peace of mind.
• Flexible benefits with Cobee:
  Optimise your salary package with flexible retribution.
• Top-tier tools & tech
  : We invest in the best tools so you can do your best work.
• International environment
  : Collaborate with global clients and colleagues.

Our culture

We move fast but thoughtfully. We believe in autonomy and ownership. At Kenmei, your voice matters: you'll help shape not just the codebase, but also the product and the way we work.

Kenmei is an equal opportunities employer and takes care to avoid any form of discrimination.

As part of its commitment to diversity, gender equality and geographical distribution, it strongly encourages applications from female candidates, even if you don't have 100% requirements but a similar role and applies a policy of equal opportunities.

Kenmei does not discriminate against anyone on grounds of gender, social origin, genetic features, disability, religion, or belief, political or any other opinion, sexual orientation, race, colour, membership of a national minority, property or birth.

Location:
 Remote (EU/US friendly time zones) | Full-time

At 
Alinia AI
, we help enterprises in finance, insurance, and healthcare deploy generative AI safely and responsibly. Our platform provides alignment guardrails and compliance monitoring to ensure AI systems are trustworthy.

We're hiring a 
Backend Engineer
 to design and scale privacy-first backend systems, APIs, and services that meet enterprise-grade security and compliance standards.

What you'll do:

• Build and maintain backend APIs and services.
• Implement security & privacy safeguards (SOC2, GDPR, ISO
• Support SaaS, VPC, and on-prem deployments.
• Collaborate across engineering, ML, and compliance teams.

What we're looking for:

• 3–5+ years backend engineering experience.
• Strong Python (FastAPI/Flask/Django) + PostgreSQL.
• Cloud + Kubernetes/Docker.
• Data security expertise (encryption, IAM, logging).

Bonus: VPC/on-prem experience, regulated industries, gRPC/distributed systems.

Remote | Competitive comp + equity | High-impact role

To apply send your resume to