Senior Backend Developer

New

Working remotely within EuropeFull-TimeSenior

Salary not disclosed

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Job Details

Languages: Fluent English (minimum B2 level)
Required Skills: Backend DevelopmentPostgreSQLJUNITJVMKotlinOAuthSpring Boot

Strong experience in backend development using Kotlin and/or JVM-based technologies
Solid hands-on experience with Spring Boot in production environments
Proven ability to build or contribute to high-abstraction systems such as query engines, rule engines, or dynamic processing frameworks
Strong knowledge of PostgreSQL, including advanced querying and JSONB data modeling
Experience writing and maintaining comprehensive automated test suites using JUnit
Ability to work collaboratively within a small engineering team and align on shared architectural decisions
Strong communication skills with fluent English (minimum B2 level) for daily technical collaboration
Comfortable working remotely within Europe and engaging in distributed team workflows

Design and implement high-abstraction backend components, with a focus on a dynamic query engine for FHIR-based data structures
Contribute to the development of a custom FHIR server built in Kotlin and Spring Boot
Collaborate with a small engineering team to define architecture, split tasks, and align on technical direction
Develop and maintain robust backend services using PostgreSQL, including JSONB-based data modeling and complex queries
Build and expand comprehensive automated test coverage using JUnit to ensure system reliability
Integrate and work with healthcare data standards such as FHIR R4 where applicable
Participate in technical discussions, surfacing blockers and refining system design with the team
Support secure authentication and authorization patterns using OAuth and identity management systems
Ensure backend systems are scalable, maintainable, and aligned with long-term platform goals

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