Work type: Office/Remote
Technical Level: Senior
Job Category: Software Development
Project: OVO Energy
We are looking for a Senior Kotlin/Java Backend Engineer who thrives in complex data-driven environments, learns new frameworks quickly, and contributes to the continuous improvement of our architecture and delivery practices.
The Market-wide Half-Hourly Settlement (MHHS) Program is a key initiative shaping the future of the UK energy market.
The system enables the measurement and processing of electricity consumption data every half hour — providing a more accurate view of real energy usage.
This drives fairer tariffs, supports renewable integration, and fosters a more efficient, data-driven energy ecosystem.
As a Backend Engineer, you will play a central role in building and maintaining the core data processing flows of the MHHS system, ensuring scalability, reliability, and accuracy of large-scale data operations.
You’ll work within the IOps pod, collaborating with cross-functional teams to design, develop, and evolve high-performance backend services running on the JVM stack.
Responsibilities:
Design, build, and maintain core backend components and data processing flows for the MHHS platformImplement reliable, efficient, and scalable services using Kotlin and Java (JVM)Work with frameworks such as Quarkus and Spring (DI) to develop and integrate backend servicesApply ORM and persistence best practices using HibernateCollaborate closely with other engineers, data specialists, and DevOps to ensure smooth system integrationContribute to the CI/CD pipeline and modern software delivery practicesEnsure observability, fault tolerance, and performance optimization of backend servicesParticipate in code reviews, architectural discussions, and continuous improvement of engineering practicesSupport Agile delivery through estimation, planning, and iterative value deliveryPromote clean code principles, testing culture, and high engineering standards Requirements:
5+ years of experience in backend development using Java and/or KotlinProficiency with Hibernate and relational databases (SQL, PostgreSQL)Hands-on experience with Spring Boot or Quarkus frameworksExperience with CI/CD pipelines, version control (Git), and Agile delivery practicesExperience with Docker and cloud environments (AWS and/or GCP)Knowledge of Kafka, message queuesUnderstanding of event-driven architecture and RESTful APIsExperience building reliable, scalable backend systems with a strong observability and security focusExcellent problem-solving and analytical skillsUpper-intermediate English and effective communication in distributed teams Would be a plus:
TypeScript skills — ability to understand or contribute to backend code when neededUnderstanding of energy sector data flowsWe offer*:
Flexible working format - remote, office-based or flexibleA competitive salary and good compensation packagePersonalized career growthProfessional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)Active tech communities with regular knowledge sharingEducation reimbursementMemorable anniversary presentsCorporate events and team buildingsOther location-specific benefits *not applicable for freelancers