Senior Software Engineer (Payments)

Location: Berlin, Germany; hybrid work with up to 3 days per week from home

Company

hirify.global provides B2B Buy Now, Pay Later payment methods and digital checkout solutions based on machine-learning-supported risk models and a scalable technology platform.

What you will do

• Design, develop, test, deploy, maintain, and improve software owned by the team, including new features and existing services.
• Understand, modify, and debug complex payment and business flows across Kotlin and PHP systems; participate in incident response and own RCA follow-ups.
• Work with Staff Engineering and architecture groups to turn target architecture into incremental delivery plans.
• Write and review technical specifications covering options, trade-offs, design, testing, rollout, and deliverable tickets.
• Use AI agentic coding tools for code exploration, implementation drafts, testing, and reviews while remaining accountable for shipped code.
• Review code, mentor engineers, unblock teammates, represent the team with stakeholders, and participate in interviewing.

Requirements

• 5+ years of practical engineering experience.
• Production experience with Kotlin, ideally, or Java solutions built on Spring.
• Experience building and operating highly available and reliable microservices in cloud environments.
• Hands-on production experience with AI agentic coding tools and spec-driven development.
• Ability to evaluate architectural decisions through clear trade-off analysis.
• Experience in a product-focused environment and a strong interest in business finance and money movement between companies, banks, and investors.
• Experience with TDD, pair or mob programming, and continuous delivery.
• Clear communication with technical and non-technical audiences and effective collaboration with engineers, product managers, and stakeholders.
• Working understanding of domain-driven design; willingness to own the security, reliability, and scalability of shipped systems under a “you build it, you run it” approach.

Nice to have

• Experience with Apache Kafka, Flink, Beam, stream processing, or reactive streams.

Culture & Benefits

• Autonomous product teams with flexible working hours and a hybrid working approach.
• 30 days of vacation per year, sabbatical opportunities, and additional child sickness leave for parents.
• Virtual Shares Incentive Program and an annual development budget.
• Free German group classes and an English-speaking, multicultural team with more than 40 nationalities.
• Discounted Berlin public transport, Deutschland-Ticket, or JobRad options, plus company events and interest groups.