Controls Software Engineer (m/w/d)

Fluence (Nasdaq: FLNC) is a global market leader delivering intelligent energy storage and optimization software for renewables and storage. Our solutions and operational services are helping to create a more resilient grid and unlock the full potential of renewable portfolios. With gigawatts of successful implementations across nearly 50 markets, we are transforming the way we power our world for a more sustainable future. For more information, please visit fluenceenergy.com .

Job Description:

Role Overview

As a Controls Software Engineer, you will contribute to the design, development, and testing of control systems for grid-scale battery energy storage projects. You will work with senior engineers to implement robust and secure software solutions, participate in code reviews, and help ensure high-quality deliverables. This role provides opportunities to learn, grow, and make an impact within a collaborative team environment.

Key Responsibilities

• Develop and implementing real‑time control services (dispatch, balancing, state machines) in C/C++.

• Support integration of devices and protocols (Modbus, MQTT) under guidance from senior engineers.

• Participate in code reviews, unit/integration testing, and CI/CD workflows.

• Take ownership of assigned tasks and contribute to team goals.

• Write and maintain tests for software modules.

• Support development controls by integrating battery and power conversion systems from industry-leading manufacturers.

• Focus on robustness, security, performance, scalability, and maintainability with support from senior team members.

• Assist in optimizing latency, throughput, and reliability for Linux/embedded targets.

• Help deliver projects on schedule and within budget.

• Track, manage, and report work using JIRA and Confluence.

Required Qualifications & Experience

• Experience with C/C++ on Linux/embedded/RTOS; solid understanding of systems fundamentals.

• Familiarity with the Agile development framework.

• Basic knowledge of real‑time controls and error handling for power systems.

• Experience working in Linux deployment environments (Ubuntu preferred).

• Device/protocol integration (Modbus TCP/IP; familiarity with DNP3/IEC‑61850).

• Git, CI/CD, automated testing; collaborative engineering practices.

• Motivation to learn, take responsibility, add value within a team, and ability to work with supervision.

• BA or MS in Computer Science, Software Engineering, or Mathematics from an accredited university with 2+ years of work experience. Related work experience will be considered in place of a master’s degree. Exposure to Power System Market Applications.

• Experience with Industrial Protocols: Modbus TCP and MQTT.

• Willing and able to travel, domestically and internationally, up to 5% of the time.

Our Culture

At Fluence, our culture is the foundation that drives our ambitious growth strategy and fuels our mission to transform the future of energy. Our core cultural pillars empower us to innovate, collaborate, and lead with purpose, ensuring we continue to deliver unparalleled value to our customers and the world.

Unleash Voices

We believe every voice matters. We encourage openness, active listening, and decisive action to create a culture where everyone has the opportunity to contribute to our success. We foster an environment where diverse perspectives are heard and valued, driving innovation and progress.

Customer Fluent

Our customers are at the heart of everything we do. We’re committed to delivering exceptional value that exceeds expectations by understanding our customers' needs and adapting swiftly to meet them. Our deep focus on customer satisfaction drives us to continuously improve and innovate.

Infinite Impact

We are committed to creating the impossible. We push boundaries to deliver sustainable, game-changing solutions that shape a brighter, more energy-efficient future for all. Our team is passionate about making a lasting impact that will resonate for generations to come.

All In

We are all in for growth. Our teams are relentlessly focused on identifying and seizing opportunities that propel us forward. We embrace an ownership mindset, pushing ourselves and each other to accelerate progress and create lasting success.