Senior Full Stack .Net Developer

  • Philadelphia, PA, USA
  • Full-time

Company Description

Customized Energy Solutions (CES), a privately-held company, is a leading service provider of market intelligence and operational support services to companies participating in the retail and wholesale electric and natural gas markets. Utilizing deep know-how developed since the inception of the deregulated energy markets, CES provides accurate & timely analysis on regulatory changes, market opportunities, and operational efficiencies for electricity and natural gas commodities.

Join a rapidly growing company in an exciting and dynamic work environment. As one of the top 100 fastest growing companies in the Philadelphia region, Customized Energy Solutions offers an opportunity for significant professional growth. Our team of associates at CES is highly motivated, innovative, and passionate about providing excellent Services to our clients. We look for individuals interested in growing with our company, and working in an exciting, open and collegial work environment. Our main office is in Philadelphia, with satellite offices in various U.S. states, Canada, Japan and in India.

Job Description

We have an immediate need for a Senior Full Stack Software Developer specializing in Microsoft stack technologies (.NET, .NET Core, C#, SQL Server). This role will help drive the design and build of systems in support of CES’s Retail Services business line, which is the largest and fastest-growing in the company.

Success in this role requires a candidate with a large-scale enterprise software engineering mindset and ability to write elegant, scalable, and reliable code following architectural best practices. You have a curiosity and enthusiasm for the Energy industry, an eagerness to investigate and resolve issues, and a passion to refactor code and build systems the right way. You are a creative thinker and strong problem solver with an aptitude for picking up new technologies. You will be excited to mentor junior developers, and willing to collaborate and learn from other senior technologists in the company.


  • Build web-based, N-tier software products in a complex end-to-end ecosystem
  • Write clean, testable, scalable, and reliable code
  • Create and maintain queries, procedures, functions, and other relational database artifacts
  • Create and maintain business objects, libraries, and other middle-tier artifacts
  • Create and maintain user interface code and other improvements related to the user experience
  • Work closely with business analysts and other developers to collaboratively build software
  • Work closely with architects to ensure software design aligns with standards and best practices
  • Work closely with quality assurance testers to support testing and validation activities
  • Work closely with project managers and delivery leadership to estimate delivery effort
  • Work closely with product owners and technology leadership to ensure software build and delivery priorities are aligned with tactical and strategic goals
  • Assist IT Operations / Production Support engineers in the triage, analysis, and remediation of production issues
  • Follow the latest technology trends and suggest ideas for improvement



  • Relevant work experience in a custom software development environment building and supporting large transactional systems
  • Over 10 years of full-stack development on client-facing, web-based, multi-tier applications
  • Up-to-date experience utilizing .NET, .NET Core, C#
  • Experience in database development working with transactional data models 
  • Proficiency writing SQL queries for Microsoft SQL Server (Transact-SQL)
  • Good command of various application development design patterns
  • Database development experience working with transactional and dimensional data models
  • Experience with Git-based distributed source control tools, such as BitBucket or Github 
  • Strong analytical and quantitative skills 
  • Excellent verbal and written skills to communicate in a clear and effective manner in the English language
  • Ability to work both independently and collaboratively 
  • Ability to work well in a deadline-driven team environment  
  • Ability to think “outside the box” by developing and implementing improvements to processes and tools.


  • Technical degree in computer science, information systems, engineering, or equivalent
  • Experience in performing development or analysis activities within one or more US electric power wholesale markets (PJM, NYISO, ISONE, MISO, CAISO, ERCOT, SPP) or other non-US equivalent.
  • Experience with Atlassian SDLC tools, particularly Jira
  • Experience with both Agile/Scrum and Waterfall system development life cycle methodologies
  • Experience with DevOps and Continuous Integration/Deployment concepts
  • Experience with Dev Express or Telerik Web Controls
  • Experience with ORM, especially EF 6.0 and EF Core
  • Experience building ETL integrations using SQL Server Integration Services (SSIS)
  • Experience developing reports and dashboards using SQL Server Reporting Services (SSRS)
  • Proficient with MS SQL Server 2019
  • Experience in JavaScript, plus one or several of the JS frameworks (particularly Angular)
  • Experience with parallel / multi-threaded / multi-instanced programming / processes
  • Experience with REST-based API development with XML/JSON
  • Experience with Windows Services and IIS Management
  • Good command of WCF, Web Services, REST, and SOA

Additional Information

Customized Energy Solutions offers competitive salary commensurate with experience.  Benefits include comprehensive health Insurance, disability insurance, gym membership, Employee Provident Fund Scheme and Gratuity Scheme.

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