ESTREEM
ESTREEM
201 – 500 Employees
B2BBankingFintech
ESTREEM is a European fintech serving banks and financial institutions with an API-first payment processing platform. Its end-to-end infrastructure supports card issuing and acquiring, authorization through settlement, Visa, Mastercard and Cartes Bancaires schemes, real-time processing, digital wallets, and instant payments. The company focuses on sovereign European payment infrastructure, including European data residency and regulatory compliance, for banks and large financial partners.

Senior Java Developer - Hybrid France

Join ESTREEM to build secure, high-volume payment-processing systems in Java. Lead technical design, raise engineering quality, mentor developers, and deliver integrations with major payment networks.

Description

  • Build and maintain secure, high-performance Java applications
  • Contribute to architecture decisions and strengthen engineering practices
  • Review code and encourage consistent development standards
  • Mentor teammates through knowledge sharing and pair programming
  • Help develop team capabilities and adopt shared technical standards
  • Coordinate with Product, Engineering, and Operations to deliver reliable, high-quality solutions
  • Improve development, automation, and delivery workflows
  • Identify practical ways to apply AI tools to development and team practices
  • Design and deliver solutions for the Passerelle squad, which connects to Visa, Mastercard, and CB payment networks
  • Serve as the squad’s technical point of reference

Requirements

  • Master’s degree in computer science or engineering
  • Six or more years of Java backend development experience in complex environments
  • Substantial experience building critical or highly transactional systems
  • Experience supporting, mentoring, or facilitating technical team activities is advantageous
  • Fluent French at C2 level and professional English at B2–C1 level
  • Advanced proficiency with Java and its ecosystem
  • Strong understanding of software architecture and object-oriented design
  • Experience with distributed systems, APIs, transactional platforms, and service-oriented architectures
  • Strong CI/CD, software quality, and automated testing skills
  • Understanding of performance, resilience, and observability concerns
  • Ability to assess technical issues broadly and influence engineering decisions
  • Background in demanding environments where rigor, reliability, and delivery quality are essential
  • Commitment to continuous improvement and operational excellence
  • Technical leadership skills and a willingness to help colleagues develop
  • Clear communication and teaching skills, including explaining complex topics effectively
  • Collaborative approach to working and sharing knowledge
  • Curiosity about technology and strong interest in AI applications for software development

Benefits

  • CET (time savings account) option
  • SWILE meal voucher card
  • Sustainable mobility allowance
  • Employee savings plan (PEE), retirement savings plan (PERCO), profit-sharing, and employer matching contributions
  • Remote work for up to 10 days per month, limited to 3 days per week
  • Executive status

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