Senior Software Engineer

Pentasia; Madrid; Híbrido; EUR 65.000 - 70.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Bonus 10%

Descripción de la vacante

Pentasia in Madrid is seeking a Senior Java Developer to build and scale core backend services in a distributed, event-driven environment. The role focuses on APIs, asynchronous workflows, and ensuring resilience, data integrity, and observability across services.

You will work 3 days in the Madrid office and 2 days remote, collaborating with engineering, DevOps, and compliance to maintain high standards for performance, security, and reliability.

Formación

• 8+ years of experience with Java, 5+ with Spring, Spring Boot and Microservices.
• 1+ years of experience in payments, iGaming or FinTech.
• 1+ years of experience with platform integrations and payments gateways.
• 2+ years of experience with Kafka or RabbitMQ.

Responsabilidades

• Develop and maintain core backend services (identity, transactions, data integrity) within an event-driven architecture.
• Build reliable, asynchronous workflows and high-performance APIs with versioning and consistency.
• Implement distributed transactions, concurrency controls, and resilience patterns to ensure system stability.
• Manage database evolution, security, testing, and observability across services.
• Contribute to internal tools, CI/CD, infrastructure, and leverage AI tools to enhance development efficiency.

Conocimientos

Java

Spring

Spring Boot

Microservices

Payments

FinTech

Kafka

RabbitMQ

Descripción del empleo

Descripción del trabajo

We’re hiring: Senior Java Developers

iGaming / Sportsbook / Online Casino | Senior Java Backend | Kafka or Rabbit MQ |

Hybrid in Madrid .

Salary: From €65k to €70k gross/year (DEO) + 10% bonus

Ideally with experience in payments, iGaming/Gambling or FinTech (integrations and payments gateways)

My client in the iGaming industry (online Casino and Sportbooks) is looking for a Senior Java developer , to work hybird from Madrid (3 days in the office, 2 days remote).

Role Overview

We are looking for a Senior Java developer to build and scale core platform services in a distributed, event-driven environment. The role focuses on designing reliable, high-performance systems, including APIs, asynchronous workflows, and distributed transactions. You will ensure system resilience, data integrity, and observability while contributing to testing, security, and CI/CD practices. Collaboration with engineering, DevOps, and compliance teams is key to shaping architecture and maintaining high standards across performance, scalability, and reliability.

Skills & Experience

• 8+ years of experience with Java, 5+ of experience with Spring, Springboot and Microservices
• 1+ years of experience within the payments, iGaming or FinTech industry
• 1+ years of experience with platforms integrations and payments gateway.
• 2+ years of experience with Kafka or RabbitMQ.

Key Responsibilities

• Develop and maintain core backend services (identity, transactions, data integrity) within an event-driven architecture.
• Build reliable, asynchronous workflows and high-performance APIs with proper versioning and consistency guarantees.
• Implement distributed transactions, concurrency controls, and resilience patterns to ensure system stability and correctness.
• Manage database evolution, security (auth/authz), testing, and observability across services.
• Contribute to internal tools, CI/CD, infrastructure, and leverage AI tools to enhance development efficiency.