This range is provided by Opus Resourcing Ltd. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.
Base pay range
Salary £70-90k + Bens + Options
Overview
Principal Software Engineer with a Java backend / full-stack experience to take a lead role in designing and architecting the SaaS platform for an early-stage clean-tech startup on a mission to accelerate the shift to a greener energy world by optimising complex grid-scale battery assets for asset owners through data, ML, and SaaS innovation.
Proximity to Cambridge would be ideal, although a remote role across the UK / with some company meetups. A UK-based role that requires being eligible to work.
Interested? Apply now or reach out to Opus Resourcing for more details.
What you’ll be doing as a Principal Engineer
* Lead on software design, architecture, and coding to shape a scalable, resilient full-stack SAAS platform.
* Build cloud-native Java microservices (Spring Boot / Micronaut) and drive engineering practices.
* Drive continuous improvement in engineering culture, mentoring/coaching other engineers and guiding technical decisions.
* Collaborate across product, engineering, and customer teams to deliver impactful solutions to the SaaS platform.
You’ll bring strong software engineering practices to a fast-moving, collaborative environment, setting technical direction while staying hands-on with code within a small, focused cross-functional team.
This is a rare opportunity to be part of the early days of a high-growth renewable energy startup, shaping both the product and the engineering culture. You’ll have the freedom to make architectural decisions that matter — while contributing directly to the clean energy transition.
Cambridge-based office, with flexibility to work fully remote across the UK.
Key skills you will bring as a Principal Software Engineer
* Proven track record in building enterprise-grade Java / Microservices backend systems (Spring Boot or Micronaut preferred)
* Cloud Native development ideally with AWS
* Strong experience with DDD / Domain Driven Design
* Sound knowledge of design and build of distributed systems / event-driven systems, ideally with Kafka
* Deep understanding of software architecture, patterns, scaling/resilience.
* Hands-on expertise with platform engineering / DevOps practices (Kubernetes, Terraform, containers, CI/CD, ECS, Gitlab etc).
* A proactive, startup mindset with the ability to balance strategy and execution.
Nice to have skills as a Principal Engineer
* Familiarity with Data Engineering patterns, Data Products / Kafka / Kafka streams, and Data Pipelines.
* Experience with platform-as-a-product delivery or platform engineering. Familiarity with Machine Learning Engineering tools and frameworks.
* Experience with microservice networking and service meshes (such as Istio).
* Well-informed on security considerations in a cloud native environment, with prior experience with related tooling (e.g. OPA, IRSA)
* Experience of working within startup environments
Seniority level
* Mid-Senior level
Employment type
* Full-time
Job function
* Information Technology
Industries
* Software Development
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