Senior Full-Stack Developer - SQL & .NET Expert

Beacon Hill Staffing Group, LLC; Pierre (SD); On-site; USD 110,000 - 140,000; Full time

Job summary

Beacon Hill Staffing Group, LLC is seeking an experienced developer to lead and support a core enterprise software system. You will collaborate with business stakeholders across the company to resolve tickets and advance development, focusing on production stability and scalable integrations.

The role requires strong SQL, full-stack C#/.NET, REST API design, and experience with CI/CD pipelines, Jira, and ServiceNow. Excellent communication and teamwork are essential.

Qualifications

• 4+ years of strong SQL experience including SQL queries and stored procedures.
• Ability to write, tune, and troubleshoot complex queries against a production system database (joins, window functions, CTS's, execution plans) and relational data modeling ability.
• 4+ years of full-stack software development experience preferably with C#/.NET.
• Experience with ownership of production applications spanning database, back-end API, and web front-end.
• Experience designing and consuming REST APIs and building system-to-system integrations, including authentication, payload validation, and error/retry handling.
• Proficiency with Git-based source control and CI/CD pipelines (Azure DevOps, GitHub Actions, GitLab CI, or Jenkins), including automated testing in the build.
• Some experience with AI prompts or AI coding assistants and ability to review AI-generated code.
• Familiarity with enterprise AI/LLM concepts: prompt engineering, hosted model APIs, tokens/contexts, hallucination risk, retrieval-augmented generation, and data privacy constraints.

Responsibilities

• Lead the development and support of a key core software system within a fast-growing enterprise.
• Collaborate with business stakeholders to solve tickets and drive ongoing development of the system.
• Provide production support and guide upgrades, migrations or major enhancements.

Skills

SQL

Query tuning

C#/.NET

REST APIs

CI/CD pipelines

Jira

ServiceNow

AI prompts familiarity

Stakeholder communication

Tools

Jira

ServiceNow

Git

Azure DevOps

GitHub Actions

GitLab CI

Jenkins

Job description

Beacon Hill Staffing Group, LLC is seeking an experienced developer to lead and support a core enterprise software system. You will collaborate with business stakeholders across the company to resolve tickets and advance development, focusing on production stability and scalable integrations.

The role requires strong SQL, full-stack C#/.NET, REST API design, and experience with CI/CD pipelines, Jira, and ServiceNow. Excellent communication and teamwork are essential.