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Expert C++ Engineer

23 godzin temu

Gdańsk, Pomerania, Polska Ciklum Pełny etat

Ciklum
is looking for a
Expert C++ Engineer
to join our team full-time in Poland.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As a Expert C++ Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. Platform Payments team responsible for the systems that power credit card, gift card, chip-and-PIN, and alternative payment methods across our Client's global platforms.

You will work on a large, mature C++ codebase that spans multiple generations of the language (from C to modern C++23), helping to improve its performance, reliability, security, and maintainability while supporting ongoing business growth.

Responsibilities
:

  • Design, implement, and maintain features in a high-throughput payment processing platform
  • Develop and integrate payment gateways such as Braintree, Adyen, Klarna, Shift4, MPGS, and others
  • Implement security-critical functionality including encryption, secure data handling, and PCI-compliant workflows
  • Optimize transaction processing pipelines for performance, scalability, and reliability
  • Build and maintain automated tests including unit, integration, and security-focused tests
  • Investigate, debug, and resolve production issues in a complex legacy system
  • Collaborate with payment operations and business teams to onboard new payment methods and providers
  • Ensure systems meet PCI-DSS and financial industry compliance standards
  • Participate in on-call rotations to support production payment systems
  • Contribute to ongoing modernization efforts, migrating legacy code toward newer C++ standards

Requirements:

  • 7+ years of professional experience with C++ in production systems
  • Strong understanding of systems programming, including memory management, concurrency, and performance optimization
  • Experience working with financial or payment processing systems
  • Experience with Claude Code
  • Solid knowledge of security best practices, including cryptography and secure handling of sensitive data
  • Experience working with large, legacy codebases
  • Strong debugging and troubleshooting skills
  • Familiarity with HTTP/HTTPS and RESTful APIs
  • Experience with Linux/Unix environments
  • Knowledge of Apache modules
  • Working knowledge of build systems, with Bazel being a strong advantage

Desirable:

  • Experience with Kafka or event streaming platforms
  • Experience in the financial services industry
  • Hands-on experience with OpenSSL or cryptographic libraries
  • Experience with gradual modernization of legacy systems

What`s in it for you?

  • Strong community: Work alongside top professionals in a friendly, open-door environment
  • Growth focus: Take on large-scale projects with a global impact and expand your expertise
  • Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
  • Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies
  • Flexibility: Enjoy flexibility – full remote working possibilities
  • Care: We've got you covered with company-paid medical insurance, mental health support, and financial & legal consultations

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you'll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.

With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation—and your impact reaches millions.

Want to learn more about us? Follow us on Instagram, Facebook, LinkedIn.

Explore, empower, engineer with Ciklum

Interested already? We would love to get to know you Submit your application. We can't wait to see you at Ciklum.