Sr. Software Engineer - Backend Developer

Constellation Energy Generation, LLC. • Houston, TX

1d

About The Position

Constellation/Calpine is seeking a Full‑Stack / Backend Developer to design, build, and maintain enterprise‑grade APIs and Azure API Management (APIM) layers that securely expose data from SQL databases and AI/ML models. This role will focus on building scalable, secure, and reusable APIs that support internal applications, analytics platforms, and AI‑powered solutions across Constellation/Calpine.

Requirements

• Bachelor's degree in Computer Science, Engineering, Mathematics, or a related technical field with at least 5 years of relevant experience, or, in the absence of a degree, a minimum of 9 years of relevant experience
• Demonstrated ability to lead small to medium teams in delivering software solutions
• Demonstrated strong software development capabilities coupled with the ability to work under tight deadlines
• Teamwork and self-motivation skills to achieve success in a rapidly evolving environment
• Excellent communication and presentation skills, with the ability to translate technical concepts for diverse audiences
• Knowledge of operating systems such as Windows or cloud platforms such as Azure, Amazon Web Services, or Google Cloud
• Strong knowledge of software development languages, such as Python, C#, JavaScript, Node.js, .NET, HTML or Angular
• Strong knowledge of SQL or NoSQL databases such as Oracle, SQL Server, Cosmos DB, MySQL, Redis, or Splunk
• Strong understanding of advanced programming concepts, data structures, and algorithms

Nice To Haves

• Proven expertise in architecting and developing robust, cloud-native applications on Microsoft Azure, utilizing .NET/C# and Node.js backend frameworks. Demonstrated deep understanding of microservices architecture and design principles to deliver scalable, high-performance enterprise solutions.
• Experience designing and building enterprise APIs and delivering through APIM with strong relational database skills.
• Experience with Azure OpenAI or GenAI solutions by elevating Enterprise data from data platforms, analytics.
• Experience in integrating backend services with AI/ML models or AI platforms.
• Strong understanding of cloud native design principles on Microsoft Azure.
• Azure Components, SQL Server, Azure DevOps (Repos, Pipelines), Azure Key Vault, Application Insights
• Experience working in regulated or enterprise environments
• Strong problem‑solving and analytical abilities
• Ability to work across engineering, data, and AI teams
• Clear communicator with a focus on collaboration
• Ownership mindset and attention to operational excellence

Responsibilities

• Engage with business partners to gather information, analyze requirements and deliver practical, efficient and cost-effective solutions that satisfy business needs.
• Write product specifications and design documentation for assigned system components.
• Design, develop, and review complex code and technical architecture to ensure alignment with functional and technical specifications; deliver solutions including web, mobile, full stack, and integration applications across on premises and cloud environments; develop automated unit and UI tests.
• Lead engineering team and provide oversight for less experienced engineers; Stay on top of latest technologies and trends.
• Using error reports, establish priorities and assign out bugs to relevant team members for resolution.
• Support development of version control principles (e.g. Git and working within an agile environment), CI/CD pipeline and various automations.
• Ensure all risks and issues that affect the project are captured following set process and are actioned appropriately.
• Enhance knowledge of and compliance with preferred technologies, methodologies, standards and policies.
• Maintain and enhance technical knowledge and business acumen within the relevant discipline or function.
• Provide IT teams and business personnel with technology solutions by weighing advantages of technology trends, market availability of products, risks and benefits of technology to meet business/IT needs.
• Participate in IT architecture review and standards setting.
• Assist in the development of white papers, conducting presentations as needed to explain why a technology is being recommended by IT.
• Deliver production REST APIs that expose enterprise SQL data, managed and published via Azure APIM (gateway + developer portal).
• Build secure, high‑performance APIs and backend services integrating Azure SQL Database, Databricks, and enterprise data stores with Azure OpenAI, custom ML models, and RAG pipelines—optimizing SQL/stored procedures and enabling consumption of structured and unstructured data for AI‑driven applications.
• Apply Constellation/Calpine security standard, data protection and implement observability (logging/tracing) and reliability practices (HA/DR, governance).

Benefits

• Constellation offers an extensive selection of benefits and rewards to help our employees thrive professionally and personally.
• We provide competitive compensation and a wide-range of benefits that support both employees and their families, helping them prepare for the future.
• In addition to highly competitive salaries, eligible employees are offered a bonus program, 401(k) with company match, employee stock purchase program; comprehensive medical, dental and vision benefits, including robust wellbeing programs; disability and life insurance benefits; paid time off for vacation, holidays, and sick days; and much more.
• Expected salary range of $117,900 to $131,000, varies based on experience, along with comprehensive benefits package that includes bonus and 401(k).

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 5,001-10,000 employees