Senior Software Developer (Core Gateway)

Senior Software Developer (Core Gateway)

payabl. Frankfurt am Main, Hesse, Germany

About the role

In the Core Gateway team, you will be part of a team of experts whose sole mission is to ensure Core Gateway stability and performance. The Core Gateway team provides secure, reliable, and fast online payment processing solutions to businesses around the world.

Location: Hybrid in Frankfurt Office or Remote if based over 1 hour away from our Frankfurt office in Germany

Reporting to: Technical Team Lead

Responsibilities

• Implement Microservices in Python to support the legacy system
• Design, develop, and maintain server‑side components of our payment gateway platform, ensuring high performance, scalability, and reliability
• Integrate third‑party APIs and external services into existing systems to enhance functionality and usability
• Collaborate with cross‑functional teams to gather requirements, define technical solutions, and implement new features
• Work closely with DevOps to deploy, scale, and maintain applications in cloud environments, focusing on CI/CD pipelines
• Contribute to code reviews, providing constructive feedback to peers and ensuring code quality
• Provide support and maintenance and extend current features
• Work with the Perl legacy system

Qualifications

• Proficiency in Python with 5+ years of experience
• Experience with microservices architecture and RESTful API design
• Strong knowledge of server‑side technologies and frameworks such as Django or FastAPI
• Familiarity with GitLab CI/CD pipelines
• Experience integrating third‑party APIs and external services
• Strong experience in developing microservices
• Experience with containerization (Docker)
• Familiarity with cloud technologies (AWS, GCP)
• Experience with high‑performance distributed systems
• Experience with payment gateway platforms or similar financial systems is a plus
• Desired: experience with Perl or willingness to learn Perl for maintaining legacy systems
• Exceptional attention to detail
• Strong written and verbal communication skills in English
• A customer‑centric, empathetic mindset with excellent listening skills
• Ability to focus on what counts, creating simple solutions to deliver fast results

Perks

• Competitive compensation: market‑aligned salary and bonus potential reflecting our annual success
• 28 vacation days plus special holidays on December 24th and 31st
• Career growth in a flat hierarchy with rapid professional development
• Global perspectives in an international environment
• Choice of Mac or Windows laptops to enhance comfort and productivity
• Regular team events fostering collaboration and community
• Hybrid work options and relaxation area with a massage chair
• Daily lunch provided through Sodexo

Hiring Process

1. Initial interview: 30‑40 min online Google interview with a Talent Acquisition partner
2. Technical assessment interview: live coding challenge with team lead and technical experts (90‑180 min, onsite if possible or online)
3. Final behavioral interview: 45‑60 min discussion with the CTO and Senior Talent Acquisition partner

Ready to join us? Let’s embark on a journey to redefine the landscape of payments together. Join our team and innovate, disrupt, and lead the future of payments.

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