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Senior Software Engineer Level 3 Jobs (NOW HIRING)

Synergy ECP

Software Engineer Level 3

Columbia, MD · On-site

Citizenship 1 Fulltime Software Engineer Level 3- develops, maintains, and enhances complex and diverse software systems (e.g., processing-intensive analytics, novel algorithm development ...

Synergy ECP

Software Engineer Level 3

Columbia, MD · On-site

Citizenship 1 Fulltime Software Engineer Level 3 - develops, maintains, and enhances complex and diverse software systems (e.g., processing-intensive analytics, novel algorithm development ...

DUIT

Software Engineer Level 3

Washington, DC · On-site

We are looking for the best and brightest senior level software engineers having 20 or more years of experience to join our winning and innovative information technology team! **100% onsite, but some ...

JASINT

Software Engineer Level 3

Annapolis Junction, MD

$173K - $193K/yr

Software Engineer Level 3 Location(s) : Annapolis Junction, MD Hours : Regular Full-Time Salary Range : $173k - $193k/yr Clearance Requirements This position requires a current and active TS/SCI with ...

Markon

Software Engineer Level 3

Fort George G Meade, MD · On-site

$225K - $240K/yr

Description Markon is seeking a Software Engineer Level 3 to develop, maintain, and enhance complex software systems in support of mission-critical programs for the Fort Meade Customer. This role ...

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How much do senior software engineer level 3 jobs pay per year?

As of May 31, 2026, the average yearly pay for senior software engineer level 3 in the United States is $143,292.00, according to ZipRecruiter salary data. Most workers in this role earn between $122,500.00 and $161,500.00 per year, depending on experience, location, and employer.

What is the difference between Senior Software Engineer Level 3 vs Senior Software Engineer Level 2?

CriteriaSenior Software Engineer Level 3Senior Software Engineer Level 2
ExperienceTypically 5+ years of experienceUsually 3-5 years of experience
ResponsibilitiesLeads complex projects, mentors juniors, influences architectureHandles moderate projects, provides guidance to juniors
SkillsAdvanced technical skills, system design, problem-solvingProficient technical skills, coding, debugging
CertificationsOptional, but often includes specialized certificationsOften includes foundational certifications

The main difference between Senior Software Engineer Level 3 and Level 2 lies in experience, scope of responsibilities, and technical expertise. Level 3 engineers typically lead complex projects and mentor others, reflecting a higher level of proficiency and leadership within the team.

What cities are hiring for Senior Software Engineer Level 3 jobs? Cities with the most Senior Software Engineer Level 3 job openings:
What are the most commonly searched types of Software Engineer Level 3 jobs? The most popular types of Software Engineer Level 3 jobs are:
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Senior Software Engineer Level 3 jobs near you
EO/IR Software Engineer - Level 3 or 4

EO/IR Software Engineer - Level 3 or 4

Northrop Grumman Corporation

Boulder, CO • On-site

$114K - $171K/yr

Full-time

Medical, Life, PTO

Posted 15 days ago

Northrop Grumman rating

8.1

Company rating: 8.1 out of 10

Based on 336 frontline employees who took The Breakroom Quiz

103rd of 512 rated manufacturers

Job description

RELOCATION ASSISTANCE: No relocation assistance available
CLEARANCE REQUIRED FOR START: Yes
CLEARANCE TYPE: Secret
TRAVEL: Yes, 10% of the TimeDescription
At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today, and for generations to come. Our pioneering and inventive spirit has enabled us to be at the forefront of many technological advancements in our nation's history - from the first flight across the Atlantic Ocean, to stealth bombers, to landing on the moon. We look for people who have bold new ideas, courage and a pioneering spirit to join forces to invent the future, and have fun along the way. Our culture thrives on intellectual curiosity, cognitive diversity and bringing your whole self to work - and we have an insatiable drive to do what others think is impossible. Our employees are not only part of history, they're making history.
Northrop Grumman Space Systems, Multi-Domain Operations, and Missile Defense Integration Business Unit (BU) has an exciting career opportunity for a EO/IR (Electro-Optical/Infra-Red) Software Engineer - Level 3 or 4 with a passion and expertise in physics, math and software development. The position is in Boulder, CO - Boulder is nestled in the foothills of the Rocky Mountains, and only 25 miles from downtown Denver.
Position Overview:
As a Principal (Level 3) or Sr. Principal (Level 4) EO/IR Software Engineer on the Autonomous Distributed Detection and Estimation (ADDER) Team, you will be responsible for designing, developing, testing, documenting, debugging software used to identify different threats. This fast-paced and cutting-edge research and development environment will rely on your familiarity with modern software practices. Our team of motivated technical talent works closely with the customer, end user, and each other to ensure the direct mission applicability of developed products.
Essential Functions:
  • Software development in C++ 20 and Python
  • Apply strong understanding for Electro-Optical Infrared (EO/IR) and the optical properties of materials
  • Analysis tool development
  • Technical documentation as required

Seeking candidates who find satisfaction in working on challenging and diverse assignments in collaborative settings across all levels.
This requisition may be filled at a higher level based on qualifications listed below.
This requisition may be filled at either a Principal Software Engineer - Level 3 or a Sr. Principal Software Engineer - Level 4.
Basic Qualifications:
  • Sr. Principal Software Engineer: Bachelor's Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline preferred from an accredited university and 8 years of related work experience, or a Master's degree in a STEM discipline and 6 years of related work experience, or a PhD and 4 years of related work experience, or 12 years of related experience in lieu of a degree may be considered.
  • Principal Software Engineer: Bachelor's Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline preferred from an accredited university and 5 years of related work experience, or a Master's degree in a STEM discipline and 3 years of related work experience, or a PhD and 1 year of related work experience, or 9 years of related experience in lieu of a degree may be considered.
  • Applicants must have a current active in-scope U.S. Government DoD Secret security clearance at the time of application, with a willingness to upgrade to Top Secret if necessary.
  • Ability and willingness to travel up to 10% to support business needs (only if needed)
  • Linux Experience
  • Modern C++ Experience (20+)
    • Ability to write modern C++ code (templates, understanding move semantics, smart pointers, etc.)
  • Python Experience
  • Modular Software Dev Experience (Example tools: Git, CMake, etc.)
  • Strong understanding of Electro-Optical Infrared (EOIR) sensors
  • Strong understanding for the optical properties of materials

Preferred Qualifications:
  • LWIR, MWIR, SWIR, NIR and Vis exposure
  • SNR understanding
  • Image Processing Experience
  • Statistical Principles & Analysis Experience (Examples: Probability Distributions, Conditional Probability, Multi-Variate Random Variables, Kalman Filters, Least Squares)
  • Data fusion experience
  • Distributed systems experience
  • Algorithm design, state estimation and tracking experience
  • Algorithm verification and validation experience
  • DevOps and DevSecOps experience
  • Technical leadership experience
  • Exposure to Overhead Persistent Infrared (OPIR)
  • Translating sensor data into actionable results
  • Exposure to long range infrared systems experience and PSF photometry
  • Stereo vision systems experience
  • Remote sensing experience
  • Container orchestration and deployment (Kubernetes and/or Docker Compose) experience
  • Atlassian suite experience (Jira, Bitbucket, Confluence, etc)

Primary Level Salary Range: $114,000.00 - $171,000.00
Secondary Level Salary Range: $142,200.00 - $213,400.00
The above salary range represents a general guideline; however, Northrop Grumman considers a number of factors when determining base salary offers such as the scope and responsibilities of the position and the candidate's experience, education, skills and current market conditions.
Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay. Annual bonuses are designed to reward individual contributions as well as allow employees to share in company results. Employees in Vice President or Director positions may be eligible for Long Term Incentives. In addition, Northrop Grumman provides a variety of benefits including health insurance coverage, life and disability insurance, savings plan, Company paid holidays and paid time off (PTO) for vacation and/or personal business.
The application period for the job is estimated to be 20 days from the job posting date. However, this timeline may be shortened or extended depending on business needs and the availability of qualified candidates.
Northrop Grumman is an Equal Opportunity Employer, making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. For our complete EEO and pay transparency statement, please visit http://www.northropgrumman.com/EEO. U.S. Citizenship is required for all positions with a government clearance and certain other restricted positions.

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About Northrop Grumman

Sourced by ZipRecruiter

At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today, and for generations to come. Our pioneering and inventive spirit has enabled us to be at the forefront of many technological advancements in our nation's history - from the first flight across the Atlantic Ocean, to stealth bombers, to landing on the moon. We look for people who have bold new ideas, courage and a pioneering spirit to join forces to invent the future, and have fun along the way. Our culture thrives on intellectual curiosity, cognitive diversity and bringing your whole self to work - and we have an insatiable drive to do what others think is impossible.

Industry

Space research administration

Company size

10,000+ Employees

Headquarters location

Falls Church, VA, US

Year founded

1939

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