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Senior Backend Engineer (f/m/d)

💼 Full-time🗓 2026-06-25

Core

Senior Backend Engineer building automated finance tools for business professionals to simplify daily tasks and enable forward-thinking decisions.

Role type

Senior IC Backend Engineer

Builds

Sales Enablement, Pricing & Billing, Acquisition, Spend Management, and Activation & Card Spend features for the Moss platform

Domain

Fintech / Financial Services

Deliverable

production ML models | product features

Required skills

Java, Spring framework, microservices, message queues, REST API design, unit testing, integration testing, feature flags

Preferred skills

system scalability, code maintainability, cross-functional collaboration, continuous improvement

Technologies

Java, Spring, microservices, message queues, REST

Responsibilities

Lead end-to-end backend development aligned with product requirements; partner with PMs and designers on project vision and UI/UX insights; collaborate with frontend engineers on API definitions and integration; write unit and end-to-end tests; devise rollout strategies and monitor performance metrics

Seniority

Senior, hands-on IC

Rewrite
## About the role At Moss, we give finance professionals the power to automate their day-to-day and make forward-thinking decisions. Our team and culture make us unique — we're driven by impact and growth, where every one of us strives to learn and excel. Recognised by Sifted's Rising 100 and LinkedIn's Top Startups, we're here to help propel your career and together, make Moss a lasting success. Our Engineering teams are seeking Senior Backend Engineers (f/m/d) for our teams in Tallinn. The following teams have open positions: - Sales Enablement - Pricing & Billing - Acquisition - Spend Management - Activation & Card Spend Collaborating closely with designers, product managers and frontend engineers, you will bring innovative ideas to life, ensuring our product helps business automate and simplify everyday tasks with intuitive and efficient tools. ## Your responsibilities Here's a bit more on what you can expect to be doing day-to-day: - Backend Development: Lead the development of the application, ensuring it aligns with the product requirements and meets performance and usability standards. Proactively provide regular updates on work progress, achievements and challenges to product managers (PMs) and designers. - Collaborative Planning: Partner with PMs and designers during project kick-offs to gain a comprehensive understanding of the overall vision, user needs, and goals. Provide valuable insights to refine UI/UX concepts and contribute to the planning of backend development. - Frontend Collaboration: Collaborate closely with frontend engineers to determine required APIs and frontend functionality. Maintain clear communication channels to ensure smooth integration of frontend and backend components. - Testing and Quality Assurance: Produce well tested and reliable code. Writing unit and functional (end-to-end) tests. - Rollout and Performance Monitoring: Collaborate with product managers to devise efficient rollout strategies for new features. Monitor performance and user feedback to identify areas for improvement and proactively address potential issues. ## About you We think you'll need the following experience and qualifications to succeed in this role: - Proven experience as a Backend Engineer, leading projects end-to-end to launch. - Proficiency in Java development technologies (incl. Spring framework), as well as latest features and best practices such as microservices, message queue, alerting, reliability and feature flags. - Understanding of development design patterns and techniques, incl. Rest API design principles. - Hands-on experience with testing approaches and libraries (unit testing, integration testing). - You are fluent in English. In addition, here are the skills and attributes we are looking for: - Pragmatic Tech Enthusiast: You have the theoretical and practical background to engineer our product. You pursue quality and scalability and follow industry and company best practices. You build systems that are easy to maintain and to understand by others. - Delivery Focus: You are driven to deliver high-quality software on time and within scope. You take ownership of your work and are committed to continuous improvement. - Collaborative Mindset: You thrive in a team environment and are comfortable working closely with cross-functional teams to achieve common goals. - Passion for Technology: You stay up-to-date with the latest trends and technologies in the field and are eager to apply them to solve real-world problems. - Growth Orientation: You are committed to personal and professional growth and are always looking for ways to learn and develop new skills.
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