Backend Developer

Work Modality: Barcelona
- Hybrid (3 days per week on-site)

Schedule: Full-time

Contract type: Indefinite

We are looking for a Backend Developer to join our team and contribute to the development of our next-generation project repository. If you are passionate about scalable architectures, cloud services, and high-performance backend solutions, this is an opportunity to work on cutting-edge technology in the blockchain and fintech space.

• Backend Development: Design, develop, and maintain backend services and APIs using Node.js, Type Script , and serverless frameworks
  .
• Integration with AWS Services: Implement integrations with AWS services such as SNS, SQS, API Gateway
  , and Lambda functions
  .
• Database Management: Manage and optimize PostgreSQL databases using Sequelize ORM and Sequelize Type Script .
• Performance Optimization: Identify and resolve performance bottlenecks, implement caching mechanisms, and ensure optimal response times for backend services.
• Serverless Deployment: Deploy and manage serverless applications using Serverless Framework and esbuild for efficient bundling.
• Dev Ops & Tooling: Work with CI/CD pipelines
  , automate infrastructure provisioning, and ensure effective monitoring and logging of backend systems.
• Testing & Quality Assurance: Write unit tests, integration tests
  , and participate in code reviews to maintain high code quality and reliability.
• Documentation &
  
  Collaboration:
  
  Contribute to technical documentation
  , mentor junior developers, and collaborate closely with frontend and cross-functional teams
  .

• Bachelor’s or Master’s degree in Computer Science, Engineering
  , or a related field.
• 2+ years of experience as a Backend Developer
  .
• Strong knowledge of Node.js, Type Script , and modern backend technologies.
• Proficiency in PostgreSQL and Sequelize ORM with Type Script .
• Familiarity with serverless architectures and deployments using Serverless Framework
  .
• Strong understanding of design patterns, SOLID principles
  , and backend development best practices.
• Excellent problem-solving skills and ability to work in a fast-paced, collaborative environment
  .
• Intermediate English level
  .

• AWS certification (e.g., AWS Certified Developer
  - Associate).
• Experience in building and maintaining scalable and distributed systems
  .
• Knowledge of event-driven architectures using AWS SNS, SQS
  , and event sourcing patterns
  .
• Contributions to open-source projects or active participation in developer communities
  .
• If you are looking for a challenge in backend development, working with scalable, high-performance architectures
  , and cloud-native technologies
  , we would like to hear from you.
• AI and Blockchain knowledge or interest.

• Problem Solving
• Teamwork & Collaboration
• Communication Skills
• Adaptability & Continuous Learning
• Mentoring & Knowledge Sharing

• Hybrid work model and flexible hours.
• Worldwide telework for 4 weeks per year.
• Health coverage
• Compensation and benefits package
• Birthday day off
• Wellness programs

• Rebuilding at Its Core:
  Innovation alone is not enough to describe our daily tasks, as we aim to be better than we were yesterday. We have the ability to question and enhance our work continuously.
• Global Impact:
  Your work will cross borders and transform the vision of the fintech landscape on a global scale.
• Growth and Learning:
  We foster an environment of continuous learning and personal development.
• Teambuilding:
  Being united is the most important thing for us, which is why we organize internal workshops.
• Startup Environment & Collaborative Culture:
  You'll be part of a dynamic international team ( +10 nationalities) that values creativity, diversity, and inclusivity.