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Senior Software Engineer, Java

Location: Stockholm, Sweden

Contract Type: Full Time Permanent

Job Reference ID: 11520

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Our DevOps culture is strong: we believe in “release small, release often.” Thanks to our fully automated CI/CD pipelines, we push over 13,000 releases to production every year, delivering value to customers in real time. We use modern technologies across backend, frontend, apps, data and infrastructure, and we’re continuously evolving. We tackle complex engineering challenges such as real-time scalability, database migrations with no downtime, and peak transaction loads, all while maintaining an exceptional and safe customer experience.

Turning skills into thrills

    Turning skills into thrills

  • Technical Expertise
  • Strategic Thinking and Innovative
  • Adaptive Problem-Solving & Experimentation
  • Cross-Functional Collaboration
  • Agility & Adaptability
  • Curiosity & Continuous Learning

United by our three values

illustration of a heart Passion to succeed

Striving for excellence and beyond

illustration of a scale Accountability

Taking ownership and upholding high standards every day

illustration of a group of people Collective Spirit

As one team, we achieve more

Senior Software Engineer, Java

The role 

As a senior software engineer, you are a core team member on whom the team relies to consistently deliver high quality solutions. You take ownership to help the team reach their goals, including actively sharing knowledge and providing feedback. You can identify and initiate activities to address improvement areas within the team. With a mature view on technical governance you have a long term perspective of the team's components and applications.

What you will do 

  • Develop secure, reliable, and maintainable solutions for authentication, authorization, and session-related flows in a business-critical domain.
  • Design and evolve backend solutions that meet both business and technical requirements, while proactively identifying risks and improvement opportunities related to security, reliability, and performance.
  • Contribute to a high engineering bar through clean design, code reviews, testing, and pragmatic engineering practices.
  • Take ownership from design to production: break down work, drive delivery, and support operational stability in production.
  • Proactively improve quality by catching issues early through automation, validation, and shift-left testing practices.
  • Make sound technical decisions and align effectively with teammates and stakeholders across product, architecture, and security.

Your experience 

  • Strong experience building and evolving production-grade backend systems in Java.
  • Solid experience with the Spring ecosystem, ideally Spring Boot, and designing APIs and service integrations in complex environments.
  • Experience working with distributed systems and event-driven architecture, ideally with Kafka and/or Solace.
  • Solid understanding of authentication and authorization concepts, including sessions, tokens, redirects, cookies, access control, and common implementation pitfalls.
  • Knowledge of OAuth 2.0 and OpenID Connect is a strong advantage.
  • Strong secure development mindset, with the ability to identify risks, think through abuse cases, and apply secure-by-default principles in design and implementation.
  • Good understanding of common application security practices such as OWASP principles, dependency/security scanning, and safe handling of sensitive data and PII.
  • Experience with testing strategies such as integration testing, contract testing, and test automation.
  • Comfortable reviewing code, giving and receiving feedback, and maintaining a high quality bar.
  • Able to break down requirements and technical designs into clear deliverables, and sequence work in a way that reduces delivery and operational risk.
  • Strong communication skills, with the ability to represent the team clearly in technical and stakeholder discussions.
  • Experience with production support, monitoring, incident handling, and driving improvements after incidents.
  • Experience using CI/CD pipelines and engineering tools to improve code quality, security, and delivery confidence.
  • Experience working with relational databases.
  • Experience with performance testing and performance-aware design is an advantage.
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Testimonials

  • Bertrand Le Piolot
    Photo de profil Bertrand Le Piolot

    My mission is to position cybersecurity as a business enabler, by finding the right balance between security requirements and business development objectives.

    Bertrand Le Piolot
    Group Cybersecurity Director
  • Lesya Liskevych
    Photo de profil Lesya Liskevych

    Our team turns every customers interaction into mainingful insights, leveraging AI to personalise and enhance the user experience on our gaming platform.

    Lesya Liskevych
    Head of Product Insights & AI Automation Technology
  • From improving product features to enhancing safe gaming practices, data isn't just information, it's a catalyst for innovation and maintaining the Group's integrty.

    Nonna Shakhova
    Cloud Data Engineer
    Nonna Shakhova
    Photo de profil Nonna Shakhova

A European gaming champion

FDJ UNITED is a European leader in betting and gaming, trusted for its iconic brands and technological strength across around 15 regulated markets. We’re rapidly digitising our lottery business and expanding our sports-betting footprint, creating exciting opportunities to build the next generation of player experiences. Here you’ll work on high-impact projects: modernising platforms, scaling data-driven personalisation, and developing tools that both delight customers and protect them. Our goal is to strengthen customer relationships through smarter identification and insights. That means meaningful, purpose-driven work, from customer service to marketing, product design, compliance and more. All within an international, innovation-focused environment. We are shaping the future of gaming, join us!

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