Senior Software Engineer

9 hours ago

Tallinn, Harjumaa, Estonia Paymentology Full time €40,000 - €80,000 per year

At Paymentology, we're redefining what's possible in the payments space. As the first truly global issuer-processor, we give banks and fintechs the technology and talent to launch and manage Mastercard, Visa cards at scale — across more than 60 countries.

Our advanced, multi-cloud platform delivers real-time data, unmatched scalability, and the flexibility of shared or dedicated processing instances. It's this global reach and innovation that sets us apart.

We're looking for a Senior Software Engineer to implement high-quality software solutions that power our global payments infrastructure. This role requires deep problem-solving capability, and a strong focus on scalable, maintainable systems. You'll work closely with cross-functional teams to develop features in highest quality — helping shape the future of Paymentology's technology.

What you get to do:
  • Design, develop, and maintain high-quality Java Spring Boot microservice applications.
  • Write clean, maintainable, and efficient code, following best practices and design patterns (e.g., SOLID principles).
  • Perform code reviews and ensure adherence to coding standards across the development team.
  • Debug, troubleshoot, and optimize applications for performance, scalability, and reliability.
  • Stay updated with emerging technologies and incorporate relevant innovations into development practices.
  • Collaborate across teams to deliver reliable software that meets business and customer needs.
Requirements

What it takes to succeed:

  • Proficiency in one or more programming languages such as Java.
  • Strong understanding of software architecture principles and design patterns.
  • Knowledge of database systems and proficiency in SQL.
  • Proficiency in software engineering fundamentals including data structures, algorithms, object-oriented design, and SOLID principles.
  • Familiarity with version control systems (e.g., Git), IDEs, and issue tracking tools like JIRA.
  • Experience with unit testing and/or Test-Driven Development (TDD).
  • Strong problem-solving abilities and analytical thinking.
  • Excellent teamwork and communication skills, particularly in remote-first environments.
  • Continuous learning mindset with a passion for innovation and technical excellence.
  • Excellent written and verbal communication skills in English.

Education and Experience:

  • Bachelor's degree in Computer Science, Engineering, or a related field preferred, though equivalent work experience may be considered.
  • 5–7 years of experience in software development roles, showing progressive growth in technical scope.
  • Experience leading or contributing to complex software projects from design to delivery.
  • Hands-on experience in Agile development, code reviews, and CI/CD pipelines.
  • Experience with frameworks and tools such as Spring Boot.
  • Experience with microservices.
  • Familiarity with multi-cloud Kubernetes environments.
  • Strong track record of troubleshooting and debugging complex production systems.
What you can look forward to:

At Paymentology, it's not just about building great payment technology — it's about building a company where people feel they belong and their work matters. You'll be part of a diverse, global team that's genuinely committed to making a positive impact through what we do. Whether you're working across time zones or contributing to initiatives that support local communities, you'll find real purpose in your work — and the freedom to grow in a supportive, forward-thinking environment.

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