As a Senior Backend Developer , you will be responsible for designing, developing, and maintaining scalable backend applications using Java and TypeScript while contributing to the implementation of blockchain-based solutions where security, transparency, and performance are critical.

You will collaborate closely with architects, frontend developers, DevOps engineers, and product teams to deliver high-quality software that meets business and technical requirements. This role requires a strong engineering mindset, excellent problem-solving skills, and the ability to work in an international environment where English is the primary language of communication.

Key Responsibilities

- Design, develop, and maintain scalable backend services using Java and TypeScript .
- Build secure, reliable, and high-performance APIs and distributed backend applications.
- Contribute to the design and implementation of blockchain-based solutions and integrations.
- Collaborate with solution architects and engineering teams to define technical architectures and system designs.
- Develop and optimize microservices and enterprise backend components.
- Ensure code quality through testing, code reviews, and adherence to software engineering best practices.
- Troubleshoot complex technical issues and optimize system performance.
- Participate in Agile ceremonies and collaborate with cross-functional teams throughout the software development lifecycle.
- Document technical solutions and contribute to continuous improvement initiatives.
- Stay up to date with emerging backend and blockchain technologies, recommending improvements where appropriate.

Required Skills & Experience
- 5+ years of professional experience in backend software development.
- Strong expertise in Java and TypeScript .
- Experience designing and developing scalable backend applications and RESTful APIs.
- Solid understanding of distributed systems and modern software architecture principles.




- Experience working with blockchain technologies or blockchain-based application development.
- Knowledge of software design patterns, clean code principles, and backend best practices.
- Experience with version control systems such as Git.
- Strong analytical, troubleshooting, and problem-solving skills.
- Ability to work effectively in Agile development environments.
- English level: C1 (Mandatory) .

Nice to Have
- Experience with microservices architecture and event-driven systems.
- Knowledge of cloud platforms such as AWS, Azure, or Google Cloud.
- Experience with Docker, Kubernetes, and CI/CD pipelines.
- Familiarity with smart contracts and distributed ledger technologies.
- Experience working in financial services, fintech, or digital asset environments.
- Knowledge of security best practices for backend and blockchain applications.

About the projects You will work 100% remotely from a location of your choice. Occasional in-person meetings may be required, so you must reside in Spain or another European Union country.

You will work on projects for a leading digital transformation company with a strong focus on technology and innovation. They operate in sectors such as banking (serving 35 of the world's top banks), insurance, industry, and automotive, working on initiatives involving Big Data, Blockchain, Artificial Intelligence, and Cloud technologies, among others.

About the client

Integral presence in over 15 markets.

More than 8,000 employees.

Over 35 years of experience.

About the process and employment arrangement

If you are interested in this position, we will register you for the process and submit your application anonymously (without contact details) to the technical and HR departments so they can evaluate your profile and salary expectations.

If the assessment is positive, we will arrange the necessary meetings for the client to meet you and explain the project in detail.

If both parties agree on the terms following the meeting, you will receive a firm offer to work with us or to be hired directly by the client.

📌 Senior Backend developer (España)
🏢 mpforall
📍 España