Senior Software Engineer (Kotlin)

Estonia·TallinnHybridsenior

Software EngineerSoftware Engineering

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Quick Summary

Key Responsibilities

Develop card systems and card related services, supporting card issuing integrations with internal and external systems. Contribute to the development of cloud native,

Technical Tools

Software EngineerSoftware Engineering

Yes, you can! That's our attitude towards our work, ambitions, ideas and relationships. We, at Luminor, believe that anyone has the potential to achieve big things and encourage everyone to achieve them – professionally and personally.

Whoever you are, and whatever your role is, with Luminor you will get a once-in-a-lifetime opportunity to build a local banking champion.

You'll join our Cards Engineering team to build and enhance modern card issuing and payment solutions. In this role, you’ll design and develop cloud-native, event-driven applications using Kotlin and modern JVM technologies, contributing across the full software development lifecycle.

Responsibilities

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Develop card systems and card related services, supporting card issuing integrations with internal and external systems.
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Contribute to the development of cloud native, event-driven applications within the Cards Engineering domain as part of an agile team.
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Design, implement, and maintain software components for card processing flows, ensuring compliance with banking IT standards and regulatory requirements.
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Ensure high performance, reliability, and maintainability of mission critical card applications through clean, well-tested code.
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Participate in code reviews, applying best practices and ensuring consistent coding standards across the cards platform.
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Take part in the full software development lifecycle, including development, testing, deployment, and production support of card systems.
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Collaborate closely with product owners, architects, and other engineers to deliver reliable and scalable card payment solutions.
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Create and maintain technical documentation related to card systems, integrations, and operational processes.
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Stay up to date with industry trends in payments, cards, and banking technology to continuously improve solutions and ways of working.

Requirements

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Strong experience in Kotlin (JVM), including frameworks and tools such as Spring/Spring Boot 3.0+, Jenkins, Git, Maven, Docker, and modern JVM development practices.
Basic knowledge with cloud native deployments, preferably on AWS, using Terraform, Kubernetes, and ArgoCD.
Experience with event driven architecture, including message handling with Kafka.
Practical experience with asynchronous processing, flow orchestration, and system to system integrations.
Experience with S3 file processing, batch and near real time data flows.
Experience with RESTful API design & development, SOAP-based services.
Strong focus on code quality: addressing technical debt, writing clean and maintainable code, and automating tests.
Experience in banking or card/payment systems (card issuing, acquiring, authorization, clearing, or settlement) is a strong advantage.
Interest or experience in using LLMs in software development process.
Fluent English is required in spoken and written communication.

What We Offer

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✓Flexibility. Flexible working hours, hybrid work, and the possibility to work from anywhere in the EU, Iceland, Switzerland, and the UK (in total 90 days per year).

✓International teams. Teams that go outside Pan-Baltic borders, where people value challenging work together with good humor and having fun.

✓More vacation. Additional weeks of vacation are available to all employees who have been in the company for 1 year or more.

✓Volunteer time off. We care about giving back to society, therefore, you will get additional days off for volunteering purposes.

✓Paid leave. We are proud of our employees who are participating in military training. Therefore, Luminor offers 30 fully paid calendar days for military training every year.

✓Health benefits. A competitive benefits package in addition to your salary that includes health insurance after the first 3 months pass in all three Baltic states, as well as Health days in case of your absence due to sickness without a doctor's note needed.

✓Wellbeing. Access to tools and resources that help you feel good and be productive at work and in life.

✓Professional growth. Internal and external training programs, workshops, conferences, online training, etc.

✓Special Offer for Luminor products & services. Enjoy special offers & pricing for products and services provided by Luminor.

✓Gross salary. 4400-6200 EUR/month, which is to be determined depending on your level of experience and competencies.