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techroles

Software Developer

Leidos Open
St. Louis Full-time Mid-level Software Engineering

At a glance

Mid-level Software Engineering role at Leidos. St. Louis · full-time · $131,300–$237,350 base.

SalaryStated by Leidos
$131,300 – $237,350
Base salary for this role, in USD per year, as published in the posting.
This role, from LeidosOur estimate for the market: $154,013–$183,885Median $157,500
The range includes the market median of $157,500 for mid-level software engineering roles in St. Louis.
Worked out from 7 postings that stated pay, median $157,500. Last updated Nov 6, 2026.
RoleSoftware Engineering
SeniorityMid-level
LocationSt. Louis
EmploymentFull-time
Base pay$131,300–$237,350
PostedOct 23, 2026
Role brief

techroles summary, based on the employer's posting.

What you'll do

  • Modify existing GOTS code and connect open-source software for use in a web application
  • Create and document software changes in GitLab, applying DevOps methods to deliver features through Agile iterations
  • Take part in standups and planning, then review tickets with teammates against user-story acceptance criteria
  • Support testing and delivery of application features as the team works through each iteration

What you bring

  • You hold an active Top Secret clearance, can obtain TS/SCI before starting, and can retain it and pass a CI polygraph
  • You have at least eight years developing with JavaScript, Python or C#, and eight years with web-enabled applications
  • You have a bachelor’s degree or certification plus twelve to fifteen years of relevant experience, or a master’s with ten to thirteen years
  • Additional relevant experience may substitute for a degree

Who this fits

This is a senior developer position in St. Louis, offered initially as a six-month temporary role with the possibility of permanent hire. You’ll work with a team in an Agile setting and support technically complex software tasks.

From the employer

The Leidos FS2 Aero team has an opening for a senior software developer to work on the design and coding with software solutions for the Aeronautical Navigation Office for 6 month – temporary to permanent hire position. The ideal candidate has a familiarity with and a baseline understanding of software development concepts, developing coding skills using different tools, and ambition towards future projects in support of the mission.

Primary Responsibilities

  • Primary responsibilities will involve building software coding knowledge providing the system administration and modification of existing GOTS code to integrate open-source software solutions for display in a web application.
  • This role will work with programming languages to include C#/Java and JavaScript/TypeScript, Python, Shell scripting.
  • Creation and documentation of new and existing functionality within software version control repositories (gitlab) and utilizing DevOps principals and tools to deliver new features within an Agile construct.
  • Participate in program Agile software development initiatives (standup, planning, Increment planning) to support applications through iteration/functionality utilizing Atlassian (Jira/Confluence).
  • Participate and collaborate with team members to assess tickets to ensure proper testing and delivery of functionality per User Story Acceptance Criteria.

Basic Qualifications

  • Candidate must have an active Top Secret.
  • Candidate must be able to obtain a TS/SCI prior to starting.
  • Candidate must be able to maintain TS/SCI and obtain a successful CI poly post hire.
  • Requires BS degree or certification and 12-15 years of prior relevant experience or Masters with 10-13 years of prior relevant experience. May possess a Doctorate in technical domain. Additional years of experience may be considered in lieu of a degree.
  • Minimum 8 year of experience with JavaScript, Python, or C# development framework.
  • Minimum 8 years of experience of working with web-enabled applications.
  • Proactive self-starter demonstrates a positive, willing attitude and excellent oral and written communication skills.
  • Experience in either software development projects or software integration projects in a service-oriented environment (Cloud, SOA, Web-Services) or virtualization environment.
  • Requires expert knowledge of and ability to apply advanced technical principles, theories, and concepts.
  • Ability to resolve highly complex technical problems through advanced analysis, research, and application of best practices.
  • Basic understanding of AI tools and their applications in software development, including code assistance, debugging, documentation, and productivity enhancement.
  • Demonstrated ability to effectively plan, prioritize, and manage multiple tasks simultaneously. Ensures assignments are completed accurately, on time, and to established quality standards with a strong attention to detail.
  • Excellent verbal and written communication skills with the ability to engage effectively with team members, leadership, and customers. Capable of tailoring messages to diverse audiences, presenting ideas clearly, and collaborating with stakeholders to develop, evaluate, and implement technical solutions, processes, and approaches.

Preferred Qualifications

  • At least 1 years of experience with DOD software requirements.
  • At least 12 year of experience working in a government cloud environment.
  • AWS Solutions or DevOps certification
  • Team Collaboration tools (Jira, Confluence)
  • Active TS/SCI with Polygraph
  • DOD 8570 Compliant Certification (Sec+)

#NSBA

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

October 23, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $131,300.00 - $237,350.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Opportunity

Software Engineering work from LinkedIn, X, Reddit and Upwork, in one list.

Each morning you get everything that fits, strongest first.

Software Engineering$130k+

Find me work

By the team behind techroles.

Find me work
Opportunity

Software Engineering work from LinkedIn, X, Reddit and Upwork, in one list.

Each morning you get everything that fits, strongest first.

Find me work

By the team behind techroles.