Senior Backend Engineer (Java)

Benifex

1d•$75,000 - $90,000•Hybrid

About The Position

We are looking for a skilled Senior Backend Engineer to help evolve our Unified Profile service - the central source of truth for user identities, preferences, and cross-product data. You'll design and build robust, API-driven, event-oriented services that power a seamless, consistent experience across multiple products. If you're passionate about clean APIs, data modelling, event-driven architecture, and setting architectural direction, this role puts you right at the heart of the platform. The stack includes Java, Spring Boot, REST API's, MongoDB, Golang, Docker, Kubernetes, GCP.

Requirements

Strong experience building high-performance backend systems with Java and Spring Boot
Solid understanding of event-driven architecture (EDA) and distributed system principles
Practical experience with messaging systems (e.g., Google Cloud Pub/Sub, RabbitMQ, or similar)
Experience working with NoSQL databases, ideally MongoDB Atlas
Comfortable working with and supporting production services in cloud environments
Hands-on experience with CI/CD pipelines (CircleCI, GitHub Actions, GitLab CI, etc.)
Experience working in a fast-paced agile environment, with a focus on flow efficiency, reducing WIP, and getting stories to Done
Excellent communication, collaboration, and problem-solving skills
Experience mentoring or technically leading engineers, fostering growth and supporting good engineering practices

Nice To Haves

Experience with Google Cloud Platform (GCP)
Experience with Keycloak or other identity/auth frameworks
Experience with observability tooling (e.g., OpenTelemetry, Grafana, Prometheus)

Responsibilities

Design, build, and maintain high-quality REST APIs and backend services using Java and Spring Boot.
Implement and evolve event-driven workflows using Google Cloud Pub/Sub to synchronise profile data across multiple products.
Ensure the Unified Profile remains a reliable, scalable, and accurate source of truth for user identity and profile attributes.
Improve the performance, reliability, and observability of the service (logging, metrics, tracing, alerting).
Work closely with the Principal Engineer to influence the future architecture of profile management, data contracts, and event schemas.
Contribute to the design and evolution of domain events, ensuring schema consistency, forward compatibility, and good modelling practices.
Drive engineering standards across the squad, including testing strategy, CI/CD improvements, and code quality practices.
Collaborate with product teams across the organisation to integrate Unified Profile into their services and support shared use cases.
Partner with Platform, Data Engineering, and Security teams to ensure APIs, events, and data flows are compliant, secure, and well-governed.
Work with frontend and mobile engineers to define clear, well-documented APIs (OpenAPI/Swagger).
Provide technical mentorship to engineers in the team, supporting growth, knowledge sharing, and sound engineering practice.
Participate in architectural discussions, design reviews, and incident retrospectives, bringing strong backend expertise.

Benefits

£75,000-90,000 salary
Tech setup of your choice (MacBook Pro or equivalent, monitors, etc.)
£/€800 annual learning budget
Two hours per week as ‘Focus Fridays’
Flexible work setup
25 days holiday plus local bank holidays
Birthday off
Two half day wellbeing days
Healthcare cash plan
Employee Assistance Plan 24/7 365 support
Income Protection (75%)
Life assurance (4x salary)
Pension scheme
Enhanced parental leave package - 26 weeks fully paid maternity leave and 4 weeks fully paid paternity leave
£50 monthly allowance on Benifex card