[Hiring] Senior Java Software Engineer @OKTO PAYMENTS

Role Description

As a Senior Software Engineer, you will play a key role in designing, developing, and maintaining our next-generation payment platform. This position requires strong hands-on experience with distributed systems, Java-based microservices, and high-volume transaction processing. You will be responsible for building scalable, secure, and reliable software solutions while collaborating closely with product, infrastructure, security, and other engineering teams.

Key Responsibilities

• Software Development
  • Design, architect, and develop backend software solutions for high-volume payment processing.
  • Create and maintain high-quality, optimized code with robust unit tests and appropriate test coverage.
  • Develop scalable, secure, and reliable software solutions using Java and Spring technologies.
  • Contribute to the evolution of the payment platform and its underlying architecture.
• Software Architecture & Distributed Systems
  • Lead the design and architecture of complex distributed systems that handle real-time financial transactions at scale.
  • Take a lead role in the transition to a microservices-based architecture for payments.
  • Design and implement solutions based on Event-Driven Software Design Patterns.
  • Ensure systems meet high standards of scalability, security, and reliability.
• Payments & Integrations
  • Lead the integration of payment gateways, banks, card networks, and alternative payment methods.
  • Work with payment flows, settlement, reconciliation, and fraud detection mechanisms.
  • Contribute to the development of solutions supporting high-volume financial transactions.
• APIs & Security
  • Design and develop secure and scalable RESTful APIs.
  • Implement and work with OAuth2 Security, JWT, and SSO mechanisms.
  • Ensure the security and reliability of payment-related services and integrations.
• AWS & Cloud
  • Design and develop solutions using AWS cloud services.
  • Work with AWS services including IAM, EC2, S3, Lambda, RDS, DynamoDB, and API Gateway.
  • Collaborate with DevOps teams to optimize cloud-based solutions.
• Databases & Transaction Management
  • Work with PostgreSQL, MySQL, and NoSQL databases.
  • Implement and optimize transaction management.
  • Perform database tuning to support high-volume transaction processing.
  • Contribute to high-availability strategies for critical payment systems.
• DevOps & Production Systems
  • Collaborate with DevOps teams to optimize CI/CD pipelines.
  • Contribute to monitoring strategies for production systems.
  • Support the scalability, performance, and reliability of production environments.
• Technical Leadership & Collaboration
  • Provide technical leadership and mentor junior developers.
  • Guide the team in best practices and efficient coding techniques.
  • Collaborate with cross-functional teams to deliver highly scalable and performant solutions.
  • Drive continuous improvement initiatives, identifying bottlenecks and optimizing the software development lifecycle.
• Technical Documentation
  • Produce clear and concise technical requirements, design documents, and specifications.
  • Communicate complex technical concepts effectively with technical and business stakeholders.

Qualifications

• Bachelor's or Master's degree in Computer Engineering or a related field.
• 7 years of experience in backend software development.
• Desirable: experience leading teams and architecting payment systems.
• Proven working experience in the FinTech/Payments industry.

Requirements

• Java & Spring
  • Deep knowledge of Java 11+.
  • Strong experience with Spring Boot.
  • Strong experience with Spring Cloud (Netflix OSS).
  • Strong experience with JPA ORM.
• Software Architecture
  • Strong understanding of distributed systems.
  • Extensive experience with Event-Driven Software Design Patterns.
  • Expertise in microservices architecture.
  • Experience architecting and designing complex systems.
• Payments
  • Strong understanding of payment flows.
  • Experience with settlement and reconciliation.
  • Knowledge of fraud detection mechanisms.
  • Experience integrating payment systems and financial institutions.
• APIs & Security
  • Expertise in designing secure RESTful APIs.
  • Strong knowledge of OAuth2 Security.
  • Experience with JWT and SSO mechanisms.
• AWS
  • Strong experience with AWS cloud services, including IAM, EC2, S3, Lambda, RDS, DynamoDB, and API Gateway.
• Databases & Performance
  • Hands-on experience with transaction management.
  • Experience with database tuning.
  • Experience with PostgreSQL, MySQL, or NoSQL stores.
  • Experience with high-availability strategies.
  • Experience working with high-volume transaction processing environments.
• Version Control & Engineering Practices
  • Advanced proficiency in Git for source control and versioning.
  • Strong understanding of software development and coding best practices.
  • Experience developing high-quality, optimized code with appropriate unit test coverage.
• Languages
  • Advanced English (mandatory), with the ability to participate in technical discussions and communicate complex technical concepts effectively.
  • Spanish (mandatory), with the ability to communicate complex technical concepts effectively.

Preferred Qualifications

• Experience working with high-volume financial transaction processing systems.
• Experience with payment gateways, banks, card networks, or alternative payment methods.
• Experience working with production systems and monitoring strategies.

Benefits

• 💰 Competitive Compensation
• 📈 Career Growth
• 🎓 Continuous Learning
• 🌱 Inclusive Environment
• 🏠 Work-from-home
• 🎂 Birthday leave