API Developer ( Lead )

Location : Barcelona, Spain / Dublin, Ireland

Contract type : B2B Contract + Permanent

This is a contract-to-hire role. Initially, a 12-month contract, after which the candidate will work on our client payroll as a permanent employee.

As a Lead API Developer, you will be responsible for designing, developing, and maintaining APIs that enable the systems.

You will play a crucial role in modern software development and digital transformation strategies by ensuring that APIs are high-performance, reusable, and reliable.

Primary Responsibilities :

• Design and Develop APIs : Create high-performance, reusable, and reliable APIs that meet business needs.
• Collaborate with Teams : Work with other software developers and business analysts to understand user needs and translate them into technical requirements.
• Integrate APIs : Ensure seamless integration of APIs with existing data and software systems.
• Optimize for Performance : Optimize APIs for speed, efficiency, and scalability.
• Testing and Troubleshooting : Test APIs to ensure responsiveness and efficiency, and identify and fix bugs or bottlenecks.
• Establish Processes and Standards : Develop processes, standards, and guidelines for future reference and other developers.
• Technical Support : Provide technical support for APIs, including troubleshooting and problem resolution.
• Ensure Security : Implement appropriate encryption and data protection measures to ensure API security.
• Lead and Coach : Coach team members and lead teams as necessary.

Skills :

• Experience with API Management Platforms : Familiarity with tools like MuleSoft, Apigee, or similar.
• Knowledge of Security Protocols : Understanding of API security protocols and best practices.
• Agile Methodologies : Experience working in agile environments.
• Proficiency in Programming Languages : Strong coding skills in two of the following three languages - Java, Python, GoLang.
• Microservices : Experience building microservices in AWS and Azure, including deployment and use within these ecosystems.
• API Design : Deep understanding of API design principles and best practices.
• Integration Skills : Experience in integrating APIs with existing systems.
• Problem-Solving Skills : Ability to troubleshoot and resolve issues efficiently.
• Communication Skills : Ability to collaborate effectively with cross-functional teams.

Business Knowledge :

• Strong understanding of reliability and production management, focusing on maintaining high availability and stability across services.
• Risk-aware mindset with knowledge of operational risks in financial institutions, applying this insight to develop resilient and compliant solutions.
• Promotes a culture of continuous improvement, driving proactive enhancements in processes and systems.

Experience :

• Experience in system and software security (SSO, Kerberos, LDAP, Windows AD, etc.), ensuring robust identity and access management.
• Application of engineering principles to production management, supporting scalable and efficient operations.
• Proven track record in automation, effectively reducing manual work and enhancing workflow productivity and consistency.

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