Backend Engineer

EnerSys is a global leader in stored energy solutions for industrial applications. We have over thirty manufacturing and assembly plants worldwide servicing over 10,000 customers in more than 100 countries. Worldwide headquarters are located in Reading, PA, USA with regional headquarters in Europe and Asia. We complement our extensive line of Motive Power and Energy Systems with a full range of integrated services and systems. With sales and service locations throughout the world, and over 100 years of battery experience, EnerSys is the power/full solution for stored DC power products.

About the Job

We are looking for a Backend Engineer for our Engineering team!

As a Backend Engineer you will join our team, and you will contribute to the design, development, and evolution of our IoT platform.

You will focus on backend services, APIs, data processing, integrations, and cloud-native architecture. The ideal candidate has strong backend engineering experience, solid software design skills, and the ability to work independently in a distributed environment.

Fluency in English is essential, as the role requires regular collaboration with international stakeholders, engineering teams, product owners, and external partners.

Key responsibilities

As a Backend Engineer, you will:

• Design, develop, test, and maintain backend services for a cloud-based IoT platform
• Build reliable, scalable, and secure APIs used by Web applications, mobile applications, devices, and external systems
• Contribute to the architecture of backend components, microservices, data flows, and integrations
• Work on features related to device management, telemetry ingestion, user management, notifications, reporting, firmware updates, and system integrations
• Collaborate with frontend engineers, DevOps engineers, architects, QA, and product stakeholders
• Ensure backend services are observable, maintainable, and ready for production use
• Write clean, well-tested, and well-documented code
• Participate in code reviews and promote engineering best practices
• Contribute to technical decisions around scalability, performance, security, and maintainability

What we offer

• Flexible working model
• Opportunity to work on a modern IoT platform with real-world industrial impact
• International and cross-functional collaboration: we work at global level and your work will have worldwide exposure
• Technical ownership and involvement in architectural decisions
• A role with strong impact on backend quality, scalability, and reliability
• Learning investments, including English lessons and things like courses, conferences, and books
• You will be involved in projects that will have an impact on the future of energy storage and e-mobility, becoming a master of current and new technologies

Experience and skills

The successful candidate should have:

• Strong professional experience as a Backend Engineer, Software Engineer, or similar role
• Solid experience designing and implementing backend services and REST APIs
• Good understanding of distributed systems, microservices, and cloud-native architectures
• Experience with relational and/or time-series databases
• Good knowledge of authentication, authorization, API security, and secure coding practices
• Experience writing automated tests and working with CI/CD pipelines
• Ability to analyze requirements and translate them into robust technical solutions
• Strong problem-solving skills and ownership mindset
• Experience working in Agile or iterative development environments
• Fluency in English, both written and spoken

The following skills are considered a plus, but are not mandatory:

• Experience with Python
• Experience with Microsoft Azure
• Experience with Azure services such as Azure Kubernetes Service, Azure Container Registry, Azure Key Vault, Azure Blob Storage, or Azure Pipelines
• Experience with Kubernetes, Docker, Helm, or GitOps tools
• Experience with IoT platforms, telemetry ingestion, device management, or firmware update workflows
• Experience with message brokers, event-driven architecture, or high-throughput data pipelines
• Experience with infrastructure as code, especially Terraform
• Experience with monitoring, logging, tracing, and production support

Soft Skills

We are looking for someone who is:

• Experience with Python
• Experience with Microsoft Azure
• Experience with Azure services such as Azure Kubernetes Service, Azure Container Registry, Azure Key Vault, Azure Blob Storage, or Azure Pipelines
• Experience with Kubernetes, Docker, Helm, or GitOps tools
• Experience with IoT platforms, telemetry ingestion, device management, or firmware update workflows
• Experience with message brokers, event-driven architecture, or high-throughput data pipelines
• Experience with infrastructure as code, especially Terraform
• Experience with monitoring, logging, tracing, and production support

Recruitment process

The recruitment process is designed to evaluate both technical capabilities and cultural fit, while giving the candidate a clear understanding of the role, the team, and the company expectations.

The recruitment process includes four steps:

• HR interview

Initial discussion about the role, company, motivation, availability, salary expectations, and English fluency

• Engineering Manager interview

Review of the candidate’s backend experience, technical ownership, problem-solving approach, and ability to work in an international remote team

• Peer evaluation

Conversation with a future teammate to assess collaboration style, practical engineering skills, code quality mindset, and team fit

• Software Director interview

Final interview focused on seniority, organizational fit, leadership attitude, and alignment with engineering expectations

• Offer

EnerSys is always looking to hire top talent. Therefore, we encourage our employees to refer anyone they feel would be a great addition to our organization.