Millennium is seeking a skilled Full Stack Developer (Backend/.NET) to build and support complex inbound and outbound integrations across corporate accounting, partnership accounting, and financial systems. The ideal candidate brings strong backend engineering expertise, with a primary focus on .NET technologies, and the ability to design resilient, scalable systems in a fast-paced, mission-critical environment.
Principal Responsibilities
5+ year of experience in designing, develop, and maintain robust backend services, APIs, and enterprise integrations using .NET (C#)
Build and support applications and data interfaces using SQL Server and PostgreSQL
Work with business and IT stakeholders to gather, interpret, and implement requirements
Develop and maintain RESTful APIs and SOAP services to support financial close processes and accounting operations
Execute the full Software Development Life Cycle (SDLC)
Deploy and manage containerized workloads using Kubernetes
Support event-driven architecture and messaging pipelines using Kafka
Produce technical specifications and assess operational feasibility
Integrate backend software components into fully functional enterprise systems
Develop software verification plans and QA procedures
Troubleshoot, debug, and enhance existing backend systems
Ensure compliance with engineering standards and industry best practices
Collaborate with frontend developers and cross-functional teams to deliver end-to-end solutions
Help mentor junior developers and contribute to team best practices
Skills Desired
Strong development experience in .NET (C#) and understanding of python.
Experience building backend services, APIs, and enterprise applications using modern .NET (C#)
Strong experience designing and managing UI applications using Angular
Strong experience with Microsoft SQL Server and PostgreSQL, including complex SQL queries and stored procedures
Experience with REST APIs and SOAP services
Experience with GitHub, Jenkins, and JIRA
Understanding of Lean/Agile and DevOps principles
Strong written and verbal communication skills
Ability to work effectively with senior stakeholders and cross-functional technology teams
Ability to document technical requirements and specifications
Proficiency with software engineering tools and development best practices
Understanding of ML model integration and API-based AI service consumption
Hands-on experience with AI coding assistants