Backend Engineer

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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

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 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 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, whi