Senior Software Engineer (Hybrid - US)

Interested in joining a growing company where you will work with talented colleagues, enhance a supportive and energetic culture, and be part of the climate solution? At Energy Solutions, we focus on the big impacts. And we believe that market-based programs can be a powerful force to deliver large-scale energy, carbon, and water-use savings. Since 1995, we’ve harnessed that power to offer proven, performance-based solutions for our utility, government, and institutional customers.

The Information Systems (IS) team is seeking a Senior Software Engineer to provide technical direction and establish complex software solutions that support critical business applications and long-term technology objectives. As a senior individual contributor, this role leads software architecture, technical design, and engineering decisions that other teams and projects utilizing the Mendix platform rely on. Solutions must be scalable, maintainable, secure, and aligned with business and client needs.

Operating with a high degree of independence, the Senior Software Engineer evaluates technical requirements, sets direction on solution alternatives, and contributes to technical strategy within their domain. In addition, this role will mentor junior-level engineers through code reviews, technical guidance, solution design discussions, and knowledge sharing, while supporting engineering best practices, technical standards, and continuous improvement initiatives across the development team.

This is a hybrid work opportunity. ES has offices in Oakland, CA; Orange, CA; New York, NY; Portland, OR; Chicago, IL; and Boston, MA.

Responsibilities include but are not limited to:

• Lead the design and development of complex software systems, features, services, and integrations across all projects and multiple teams utilizing the Mendix platform.

• Design scalable, secure, modular, and maintainable software solutions that support current and anticipated business and client needs.

• Develop full-stack software solutions and technical designs that align with platform architecture, engineering standards, and business requirements.

• Serve as a technical subject matter expert and escalation point for complex software engineering questions and decisions across multiple teams utilizing the Mendix platform.

• Mentor and coach engineers across multiple teams and Mendix projects through technical guidance, solution design discussions, pair programming, code reviews, and constructive feedback.

• Lead technical strategy within their domain and establish engineering standards, technical approaches, and system design decisions adopted across multiple projects and shared technology platforms.

• Lead cross-functional initiatives spanning multiple teams involving system integration, APIs, data exchange, platform modernization, and performance optimization.

• Lead the Identification and communication of technical risks, dependencies, trade-offs, and mitigation strategies to project teams, engineering leads, and senior leadership as needed.

• Lead incident response, root-cause analysis, and implementation of sustainable corrective actions across teams.

• Evaluate application performance, reliability, scalability, capacity, and operational effectiveness and lead the implementation of proactive improvements.

• Ensure software systems and changes align with established security, privacy, data protection, and compliance requirements.

• Lead automation, monitoring, and operational improvements that reduce recurring issues and strengthen system resilience across teams.

Minimum Qualifications:

• Bachelor’s degree in Software Engineering, Computer Science, Information Systems, Computer Engineering, or a related technical field.

• 10 years of experience developing, supporting, and enhancing complex software systems and applications.

• Advanced proficiency in full-stack software development and one or more programming languages or technologies such as Java, Python, JavaScript, C#, SQL, HTML, CSS, or equivalent technologies.

• Advanced knowledge of software architecture, system design, design patterns, data structures, algorithms, APIs, integration practices, and application modernization techniques.

• Strong understanding of cloud platforms, deployment practices, CI/CD pipelines, monitoring, automation, and production support.

• Experience contributing to architectural and technical design decisions across applications, systems, platforms, or codebases.

• Experience evaluating technical trade-offs and recommending solutions that balance business requirements, delivery timelines, scalability, and long-term maintainability.

• Experience collaborating with engineering teams and stakeholders to support technical direction across multiple projects or shared technology platforms.

• Experience mentoring engineers through code reviews, technical guidance, solution design discussions, and knowledge sharing.

• Experience partnering with Product, Quality Assurance, Project Management, DevOps, business stakeholders, and cross-functional teams to deliver software solutions.

• Strong written and verbal communication skills, with the ability to communicate technical concepts to technical and non-technical audiences.

• Strong mentoring, coaching, collaboration, and technical leadership skills.

• Ability to manage multiple technical priorities and operate effectively in complex and evolving environments.

• Ability to work independently while maintaining alignment with established engineering standards, architectural direction, and organizational objectives.

The salary range for this role is $140,000 - $175,000/annually with a target compensation of $140k - $157,500 based on experience and qualifications.

Compensation is commensurate with experience and includes a generous retirement package. Energy Solutions provides an excellent benefits package including medical, dental and vision insurance, other pre-tax contribution plans and an Employee Stock Ownership Plan (ESOP).

AI Use

At Energy Solutions we believe in the importance of authentic interactions and equitable opportunities. We base our candidate selection on one’s own skills, knowledge, and experience. To ensure the integrity and fairness of our interview process, the use of artificial intelligence (AI) tools (including Generative AI) or other means to generate or assist with responses during interviews is strictly prohibited. This practice supports our commitment to create a transparent and equitable space where skills, knowledge and experience can truly shine.

Equal Opportunity Employer

Energy Solutions is an affirmative action-equal opportunity employer and prohibits discrimination and harassment of any type. We afford equal employment opportunities to employees and applicants without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristics protected by law. Energy Solutions conforms to the spirit as well as to the letter of all applicable laws and regulations.

Office Locations and a Remote Workforce

Energy Solutions operates as a predominantly remote workforce with offices in six different locations. Employees who reside within 40 miles of an office (except New York) will be assigned to that location, though in-office attendance requirements may vary by team. At this time, we are not accepting applications from candidates residing in the following states: Delaware, Kentucky, Mississippi, Montana, Nebraska, and North Dakota.

Background Check Information

Information will be requested to perform the compulsory background check. A drug screen and authorization to work in the U.S. indefinitely are preconditions of employment. Energy Solutions is an equal opportunity employer.

Reasonable Accommodations

Energy Solutions is committed to providing access and reasonable accommodation for individuals with disabilities. If you require accommodations in completing this application, interviewing, and/or completing any pre-employment testing, or otherwise participating in the employee selection process, please email accommodation@energy-solution.com.

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