Staff Engineer

EnergyHub (part of ) is looking to hire a Staff Engineer to join the Ground Control platform team.  There, you will play a critical role in ensuring the scalability and flexibility of our product by abstracting partner and client specific complexities to enable other internal teams to build new features and functionality quickly. This is an opportunity to join a highly energized team of engineers eager to define and develop key concepts, solve complex challenges with real-world constraints and have a positive impact on our climate future. We will be focusing on migrating from a monolithic to a microservices architecture and delivering well defined contracts to the broader organization.

We're seeking a candidate who is passionate about software engineering and thrives in a collaborative environment. Your eagerness to contribute to the team's success and the wider organization will be key. In this role, you will be responsible for designing, developing, and maintaining complex backend and web applications using Java and React. You will play a key role in all stages of the development lifecycle and work closely with cross-functional teams to deliver robust, scalable solutions. You will be pivotal in creating and maintaining the service architecture, platform, and tools necessary for a scalable, reliable, observable, and performant microservices ecosystem.

The team values working together and collaborating in person. We are building a new team in Krakow. Our employees work fully from the office with possibility to work remotely occasionally.

Main Responsibilities: What you'll do

• Own and evolve architecture — Define, document, and socialize platform-wide architectural decisions for backend services and API contracts using Java (Spring Boot) and complementary technologies.
• Technical leadership across teams — Partner with engineering leads on multiple teams to ensure scalable, secure, and performant service designs.
• Hands-on development — Design and implement critical backend and frontend components, leveraging Java, React, scripting (Python3), and strong data modeling.
• Mentorship & guidance — Coach senior and mid-level engineers, elevate code quality through reviews, and instill best practices for design, testing, and deployment.
• Complex problem-solving — Anticipate and resolve systemic challenges affecting resilience, observability, and engineering velocity.
• Platform ecosystem design — Create tools, libraries, and patterns that improve service reliability and development efficiency organization-wide.
• Cross-functional collaboration — Work closely with Product Managers and other stakeholder groups to balance technical vision with product goals and delivery timelines.
• Operational excellence — Champion CI/CD improvements, automated testing strategies (unit/integration/e2e), and best-in-class monitoring and alerting.
• Technology stewardship — Stay on top of emerging technologies and patterns, advocating for those that advance scalability, performance, and maintainability.

Required Skills and Experience

• 8+ years of professional software engineering experience, with a proven track record of delivering complex, high-impact systems in production.
• Deep expertise with Java (preferably Java 11+), Spring Framework (Spring Boot), and relational/non-relational databases.
• Advanced understanding of microservices architecture design, distributed systems principles, and interoperability patterns.
• Strong experience designing and evolving client-facing APIs and contracts with developer usability in mind.
• Demonstrated ability to work across organizational boundaries, influence technical direction, and align diverse teams on strategic decisions.
• Proven mentorship ability—cultivating technical growth in other engineers, guiding system design discussions, and improving organizational engineering practices.
• Exceptional communication and collaboration skills, especially in complex cross-functional initiatives.

• Experience with PostgreSQL, MongoDB, AWS, and Robot Framework in production environments.
• Familiarity with cloud platforms (AWS, Azure, or GCP), containerization, and deployment automation.
• Exposure to frontend technologies such as React, with an understanding of how backend choices influence frontend capabilities.
• Track record of driving systemic improvements to developer experience, observability, performance, and resilience.
• Experience guiding migration from monolithic systems to microservices, including defining domain boundaries and API contract strategies.

Why work for 

• Collaborate with outstanding people: Our employees work hard, do great work, and enjoy collaborating and learning from each other.
• Make an immediate impact: New employees can expect to be given real responsibility for bringing new technologies to the marketplace. You are empowered to perform as soon as you join the team
• Gain well rounded experience: We offer a diverse and dynamic environment where you will get the chance to work directly with executives and develop expertise across multiple areas of the business.
• Work with the latest technologies: You'll gain exposure to a broad spectrum of IoT, SaaS and machine learning obstacles, including distributed fault-tolerance, device control optimization, and process modeling to support scalable interaction with disparate downstream APIs.
• Be part of something important: Help create the future of how energy is produced and consumed. Make a positive impact on our climate.
• Long-term employment based on a permanent employment contract (CoE).
• Attractive benefits package: including medical care, life insurance, sports package, annual budget for professional development ($2,000).

About EnergyHub

EnergyHub empowers utilities and their customers to create a clean, distributed energy future. We help consumers turn their smart thermostats, EVs, batteries, and other products into virtual power plants that keep the grid stable and enable higher penetration of solar and wind power.

EnergyHub is an Equal Opportunity Employer

In connection with your application, we collect information that identifies, reasonably relates to, or describes you ("Personal Information"). The categories of Personal Information that we may collect include your name, government-issued identification number(s), email address, mailing address, other contact information, emergency contact information, employment history, educational history, criminal record, and demographic information. We collect and use those categories of Personal Information about you for human resources and other business management purposes, including identifying and evaluating you as a candidate for potential or future employment or future positions, recordkeeping in relation to recruiting and hiring, conducting criminal background checks as permitted by law, conducting analytics, and ensuring compliance with applicable legal requirements and Company policies. By submitting your application, you acknowledge that we may retain some of the personal data that you provide in your application for our internal operations, such as managing our recruitment system and ensuring compliance with labor laws and regulations, even after we have made our employment decision.We will retain this data for a maximum of 3 years after the end of the recruitment process. The data administrator is EBS Sp z.o.o.