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Senior Java Engineer (Payments)

🕒 3 days ago
📍 🇫🇷 France - Remote🎸 Senior🔎 Backend Engineer💼 Full-Time
Java 21+Spring BootApache KafkaPayment Systems
Apply Now

📜 Description

  • Design, build, and operate enterprise applications using Java and Spring Boot.
  • Lead architecture decisions, including service boundaries, data models, integrations, and non-functional requirements.
  • Develop payment platforms and external integrations for secure, reliable financial transactions.
  • Build Kafka-based event-driven workflows and improve performance, availability, security, and compliance.
  • Strengthen CI/CD, testing, observability, and deployment practices; investigate incidents and implement lasting fixes.
  • Lead code reviews, mentor engineers, collaborate across disciplines, and use AI coding tools with careful validation.

🛠️ Requirements

  • At least seven years of professional Java development experience designing, delivering, and operating complex production systems.
  • Hands-on payments or fintech experience and understanding of transaction lifecycles, reconciliation, idempotency, and regulatory constraints.
  • Strong Java 21+ and Spring Boot experience building RESTful and event-driven microservices.
  • Practical experience with Apache Kafka, asynchronous processing, idempotent operations, and exactly-once processing semantics.
  • Proficiency with PostgreSQL or MySQL, Hibernate or JPA, REST APIs, and OpenAPI.
  • Experience with build and delivery tools such as Gradle, Maven, CI/CD, GitHub Actions, Helm, or Terraform.
  • Hands-on AWS, Docker, and Kubernetes experience, plus testing and observability tools such as JUnit 5, Mockito, Testcontainers, OpenTelemetry, Prometheus, or Grafana.
  • Experience mentoring engineers, leading code reviews, making architectural decisions, and collaborating with technical and business stakeholders.

✨ Benefits

  • Fully remote working environment: Work remotely as part of a distributed engineering team
  • Exposure to leading payments organizations: Contribute to technology platforms used by established players in the global payments industry.
  • Variety of technical challenges: Work across different clients, platforms
  • Technical ownership and autonomy: Take responsibility for significant architectural decisions, production systems
  • Professional growth: Develop expertise in payment infrastructure, financial technology, cloud-native architecture
  • Collaborative engineering culture: Work alongside experienced professionals who value technical excellence, knowledge sharing, mentorship
  • Modern development tools: Apply contemporary Java technologies, cloud infrastructure, automation
  • Meaningful industry impact: Help build secure, resilient, and scalable systems that support the movement of money across global financial
Full job description

This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Senior Java Engineer (Payments) based in France.

Join a specialized engineering environment where you will design and deliver secure, scalable, and high-performance payment platforms for leading organizations in the global financial services industry. As a Senior Java Engineer, you will take end-to-end technical ownership of mission-critical systems that process financial transactions reliably and efficiently. You will lead architectural decisions, build robust integrations, and ensure the highest standards of performance, security, and regulatory compliance. Working with modern Java technologies, cloud infrastructure, and event-driven architectures, you will tackle complex engineering challenges across multiple clients and platforms. You will also help shape engineering best practices, mentor fellow developers, and drive continuous improvements across the software development lifecycle. This fully remote opportunity offers the variety of a specialist payments consultancy, combining technical leadership, international collaboration, and meaningful impact on the infrastructure powering global transactions.

How Jobgether works: We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team. We appreciate your interest and wish you the best!  Why Apply Through Jobgether?    Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.     #LI-CL1

Accountabilities:

  • Design and develop scalable applications: Build, maintain, and optimize enterprise-grade applications using Java and Spring Boot, taking ownership of features from initial design through production deployment.
  • Lead technical architecture: Define service boundaries, data models, integration patterns, and non-functional requirements for complex software components, ensuring solutions are reliable, maintainable, and scalable.
  • Deliver payment technology solutions: Develop and maintain payment platforms and integrations with external systems, APIs, and third-party providers, supporting secure and efficient financial transactions.
  • Ensure reliability and compliance: Take responsibility for application performance, availability, security, and adherence to applicable regulatory and industry standards.
  • Build event-driven systems: Develop robust asynchronous processing workflows using Apache Kafka, applying appropriate approaches to idempotency, transaction consistency, and reliable message handling.
  • Collaborate across disciplines: Work closely with product managers, solution architects, and DevOps engineers to translate business requirements into effective technical solutions while evaluating and challenging design trade-offs where necessary.
  • Improve engineering practices: Strengthen CI/CD pipelines, automated testing, observability, and deployment processes to improve delivery speed, software quality, and operational resilience.
  • Promote code quality and technical excellence: Write clean, efficient, testable code, lead code reviews, establish engineering best practices, and mentor junior and mid-level engineers.
  • Manage production incidents: Investigate operational issues, conduct root-cause analyses, and implement sustainable fixes that prevent recurrence and improve system reliability.
  • Leverage AI-assisted development: Integrate AI coding assistants and large language models into daily development workflows for implementation, refactoring, testing, debugging, and documentation, while validating their output for correctness, security, and maintainability.

    • Requirements:

  • Professional experience: At least seven years of professional Java development experience, including responsibility for designing, delivering, and operating complex production systems.
  • Payments and fintech expertise: Hands-on experience building or operating payment or financial technology systems, such as card issuing, acquiring, transaction processing, authorization, settlement, or cross-border payments. A strong understanding of transaction lifecycles, reconciliation, idempotency, and regulatory constraints is essential.
  • Advanced Java and Spring expertise: Strong knowledge of Java 21 or later, including relevant long-term support releases, and experience with Spring Boot and modern Spring Framework technologies for building RESTful and event-driven microservices.
  • Event-driven architecture: Practical experience with Apache Kafka, asynchronous processing, idempotent operations, and exactly-once processing semantics.
  • Database technologies: Proficiency with relational databases such as PostgreSQL and MySQL, along with ORM technologies including Hibernate and JPA.
  • API design and integration: Strong experience designing REST APIs, working with OpenAPI specifications, and implementing reliable integrations with external systems and third-party services.
  • Build and delivery tooling: Experience with Gradle, Maven, and CI/CD pipelines, with familiarity with tools and technologies such as GitHub Actions, Helm, and Terraform.
  • Cloud and containerization: Hands-on experience with AWS, Docker, and Kubernetes, including deploying and operating applications in modern cloud environments.
  • Testing and observability: Strong testing practices using tools such as JUnit 5, Mockito, and Testcontainers, alongside experience with production monitoring and observability technologies such as OpenTelemetry, Prometheus, and Grafana.
  • AI-assisted engineering: Regular, practical use of AI coding assistants and large language models throughout the software development lifecycle, combined with the technical judgment needed to identify and correct inaccurate, insecure, or poorly maintainable generated code.
  • Technical leadership: Experience mentoring engineers, leading code reviews, making architectural decisions, and raising engineering standards across a team.
  • Communication and collaboration: Ability to work effectively with technical and business stakeholders across distributed teams, clients, and international environments.
  • Professional mindset: A strong commitment to precision, reliability, security, accountability, and continuous learning, combined with the adaptability to work across different clients, technologies, and problem domains.
  • Additional advantages: Familiarity with payment standards and protocols such as ISO 20022, ISO 8583, EMV, and 3-D Secure, or experience with payment scheme certification.
  • Security expertise: Knowledge of encryption, OAuth2/OIDC, JWT, mutual TLS (mTLS), hardware security module (HSM) integration, and tokenization is an advantage.
  • Further relevant experience: Background in infrastructure as code, platform engineering, or direct collaboration with enterprise clients in a consultancy or professional-services environment is beneficial.

    • Benefits:

  • Fully remote working environment: Work remotely as part of a distributed engineering team, with flexibility built into the organization's operating model.
  • Exposure to leading payments organizations: Contribute to technology platforms used by established players in the global payments industry.
  • Variety of technical challenges: Work across different clients, platforms, and business domains rather than being limited to a single product or codebase.
  • Technical ownership and autonomy: Take responsibility for significant architectural decisions, production systems, and end-to-end engineering outcomes.
  • Professional growth: Develop expertise in payment infrastructure, financial technology, cloud-native architecture, and modern software engineering practices.
  • Collaborative engineering culture: Work alongside experienced professionals who value technical excellence, knowledge sharing, mentorship, and continuous improvement.
  • Modern development tools: Apply contemporary Java technologies, cloud infrastructure, automation, and AI-powered development tools to solve complex engineering problems.
  • Meaningful industry impact: Help build secure, resilient, and scalable systems that support the movement of money across global financial networks.
  • Inclusive workplace: Join an equal-opportunity working environment that welcomes qualified applicants from all backgrounds.
    • Apply Now

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