Java Developer (Dublin)

MiFinity; Dublin; Hybrid; EUR 90,000 - 120,000; Full time

Job summary

MiFinity is seeking a backend engineer to join our payments platform in Dublin. You’ll design and implement Java-based services that process money transfers, enhance APIs, and ensure scalability and reliability of the microservices that orchestrate transactions across rails.

The role covers full lifecycle from design with stakeholders to writing clean code, unit tests, debugging production issues, and collaborating with cross-functional teams to deliver secure, high-performance payment solutions.

Qualifications

• Experience building distributed systems and backend Java development.
• Ability to design scalable, reliable backend services for payments.
• Comfort with full software lifecycle from design to debugging in production.

Responsibilities

• Develop new in-house products.
• Translate use cases into functional applications.
• Design, build, and maintain efficient Java code with tests.
• Ensure performance, quality, and scalability of apps.
• Document features and share knowledge within the team.
• Collaborate with team members and stakeholders.
• Peer code reviews and code quality maintenance.
• Integrations with 3rd party applications.

Skills

Distributed systems

Java backend development

API design

Unit testing

Debug production issues

Stakeholder collaboration

Tools

Java

Spring Framework

REST APIs

JUnit

Job description

MiFinity is a dynamic, licensed, and regulated fintech leader offering cost-effective, end-to-end payment solutions for businesses, merchants, and consumers. With over 20 years of experience in online payments, we have built a highly secure technology platform and a growing global network of financial and banking partners. Our core service, the MiFinity eWallet, enables seamless money transfers worldwide through our extensive bank network and local payment options. As we continue to expand across multiple global verticals, we foster a collaborative, inclusive work environment while maintaining a start-up culture that values flexibility, autonomy, and innovation across all of our offices in Dublin, Malta, and Belfast.

Role summary

You’ll be working on the backend of systems that move money; payment processing engines, merchant integration services, and the microservices that orchestrate transactions across multiple payment rails. This means designing APIs that handle edge cases gracefully, building services that fail safely when things go wrong, and ensuring our platform can scale as transaction volumes grow. We’re looking for someone who is comfortable in the full lifecycle; from whiteboarding a technical approach with stakeholders, to writing clean Java code that other developers will maintain, to debugging production issues when required. The ideal candidate is someone who has built distributed systems before and understands the trade-offs between consistency and availability. We’re looking for someone who spots problems in the design phase, and who cares about getting it right.

Responsibilities

• Develop new in-house products
• Translate application storyboards and use cases into feasible functional applications
• Design, build, and maintain efficient, reusable, and reliable Java code
• Write clean code supported with unit testing modules
• Ensure the best possible performance, quality, scalability and responsiveness of the applications
• Document features and share knowledge within the team
• Collaborate with other team members and stakeholders
• Help maintain code quality, organization, and automatization including undertaking peer code reviews
• Perform integrations with 3rd party applications