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Software Developer III

Longenecker & Associates
Los Alamos, NM Full Time
POSTED ON 7/11/2025 CLOSED ON 1/9/2026

What are the responsibilities and job description for the Software Developer III position at Longenecker & Associates?

OVERVIEW

Longenecker & Associates (L&A) seeks a Software Developer III to contribute to our mission supporting our work at Los Alamos National Lab in Los Alamos, NM. This is a hybrid role with some on-site work required.

L&A is a woman-owned small business and trusted partner enabling critical missions across the U.S. Department of Energy (DOE) complex for more than 30 years. We contribute to DOE’s nuclear security and environmental remediation enterprise by providing the highest-caliber staff and experts.

L&A is unconditionally committed to mission success and the well-being of employees, the nation, and the environment. Our team members are passionate about building a healthier environment for generations to come. We are a community that interfaces and effectively communicates with all levels of management and government. If you have a passion for excellence, seek opportunities to engage in mission-critical work, and consistently exceed expectations, apply now to join our professional family.


POSITION DESCRIPTION

The PSS-1 Software Systems Development (SSD) Team is seeking an energetic and customer‐focused Software Developer (SD). The SSD team is responsible for the development of software tools to assist ALDWP organizations meet mission objectives. The SD will support the development of the new F.O.R.G.E. web application. The SSD team adheres to the SCRUM Framework for software development and the SD must be comfortable working within that framework. The SD must be proficient in the following areas:

  • C# .NET Development,
  • Developing Blazor Web Applications,
  • Working with Microsoft SQL,
  • Working with Microsoft IIS Web Hosting Environment,
  • Entity Framework,
  • LINQ,
  • Using SignalR for dynamic updates to web applications,
  • Single Sign On(SSO) and SAML authentication,
  • API Development,
  • Securing APIs,
  • Unit Testing,
  • Azure Dev Ops – Including Pipelines,
  • Experience working in a SCRUM Development environment,


EDUCATION REQUIREMENTS

  • Bachelors required, at least 10 years’ experience software development.


MINIMUM QUALIFICATIONS

  • Ability to obtain a Q if needed,
  • Bachelors required, at least 10 years’ experience software development,
  • Experience with C#.Net Development, Micro CCS SQL Server, and Authentication best practices,
  • Experience with SAM authentication, Signal R, Microservices, and API Development,
  • Experience with Azure DevOps.
  • Must be comfortable doing unit testing.
  • Ability to work in a diverse work environment,
  • Satisfactory results of a pre-employment screening, which includes a background check and drug screening in accordance with Federal requirements,
  • Ability to fulfill and promote L&A core values.


DESIRED QUALIFICATIONS

  • Active Q clearance is strong preferred. Top Secret is also acceptable.


LOCATION

  • Los Alamos National Lab – Los Alamos, NM – Hybrid.
  • 6 Developers on the team currently – 2 UI and 4 backend.
  • Software Systems Development Team.


PHYSICAL REQUIREMENTS AND WORKING CONDITIONS

Successful candidates will be able to perform the essential functions of the job with reasonable accommodation. This job posting reflects management’s assignment of essential functions and the descriptions listed do not restrict management’s right to assign or reassign duties and responsibilities to this job at any time.


SALARY AND BENEFITS

As an L&A employee, you will be eligible for a competitive salary as well as a comprehensive benefits package including healthcare (medical and dental), 401K plan, and paid time off. We believe in investing in our employees beyond compensation and as an L&A employee, you will have access to in-house training, career pathing, mentoring, award programs, tuition reimbursement and much more.

L&A is an Equal Opportunity Employer and all qualified applicants will receive consideration for employment regardless of their race, color, religion, sex, sexual orientation, gender identity, national origin, age, or status as a qualified individual with a disability or protected veteran.

Salary.com Estimation for Software Developer III in Los Alamos, NM
$90,965 to $110,886
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