Senior Java Software Engineer

We are seeking a highly skilled and experienced Senior Java Software Engineer to join the team of one of Kindgeek’s forward-thinking fintech partners.

This is an exciting opportunity to contribute to the development of a modern financial operating system built to transform how global businesses manage and automate their finances. As a key member of a high-impact engineering team, you will work on scalable backend systems that power innovative payment solutions, financial automation, and banking integrations.

Requirements

We’re looking for a Senior Java Software Engineer who has:

• 5+ years of professional backend development experience, ideally in payments or fintech-related products;
• Strong knowledge of at least one modern backend language (e.g. Kotlin, Java, Go, Rust, or Scala);
• Proven experience working with APIs, including integration with third-party financial or banking APIs;
• A deep understanding of payment processing, ledgering, and financial reconciliation systems;
• Solid experience with relational and non-relational databases, especially PostgreSQL;
• Strong SQL skills and familiarity with relational data modeling;
• Experience designing and developing secure, scalable, and reliable distributed systems;
• Familiarity with GraphQL, REST, RPC or other API architectures;
• A strong grasp of software design principles, architectural patterns, and the software development lifecycle (SDLC);
• Excellent debugging and problem-solving abilities;
• Good communication skills, with the ability to collaborate within cross-functional teams.
• Bonus points if you have:
• Experience working in the banking or financial services sector;
• Knowledge of financial protocols and industry standards (e.g. ISO 20022, ISO8583, SWIFT, SEPA, Open Banking APIs);
• Hands-on experience with cloud platforms (AWS or Azure), containerization, and orchestration tools (like Kubernetes);
• Exposure to infrastructure as code tools such as Terraform;
• Experience with observability tools such as Datadog, CloudWatch, or Lightstep;
• JVM performance tuning and monitoring experience.
  
  

Responsibilities

As a Senior Java Software Engineer, you will:

• Design and build core backend systems that power embedded financial solutions for banks and financial institutions;
• Lead key work streams from technical design through deployment;
• Build robust integrations with global payment rails and financial APIs;
• Write clean, maintainable, and testable code, leveraging established architecture and design patterns;
• Collaborate with product and design teams to bring domain-driven, user-focused solutions to life;
• Participate in code reviews and provide constructive feedback to peers;
• Drive innovation and problem-solving across technical challenges;
• Advocate for engineering best practices and continuous improvement across the team.
  
  

What Will You Get With Kindgeek

We want you to thrive and feel supported

• Professional growth: at Kindgeek, we want our employees to grow and achieve ambitious professional goals. We support professional development with training and certification refunds and provide regular feedback and technical reviews.
• Benefits package: Kindgeek offers all team members competitive compensation and a benefits package that includes 18 working days of fully paid vacation, 10 compensated by 50% sick leaves without a note from the doctor, and an opportunity to take study leaves. Depending on how long you stay in the company, you can receive different health insurance packages from our partners.
• Personal growth: as a part of our team, you will have access to corporate English courses with a 50% reimbursement, take advantage of our offline library and access a large selection of corporate training and classes. Also, every employee can request any internal or external training or certification if it applies to his or her work responsibilities.
• Geek community: at Kindgeek, we value community – even in the full-scale invasion times, we take every opportunity to stick together. Our geeks organise various online and offline clubs – from stretching and skiing to English. We volunteer together and support each other.
• Flexibility: Kindgeek offers a hybrid working model. Team members can work remotely or from the office or Kindgeek London Hub – an innovative cafe-style co-working in Lviv (it's pet-friendly!).
  
  

We encourage you to apply

At Kindgeek, we encourage everyone to apply – regardless of nationality, race, gender, marital status, disability, sexual identity, or religion. We are growing into an inclusive, equal-opportunity company where only professionalism, competence, and ideas matter. We are committed to supporting mobilised employees and veterans joining Kindgeek and facilitating their career development. We aim to bring equal opportunities to all team members and candidates – especially those underrepresented in technological companies.