Senior Python Software Engineer Jobs in Philadelphia, PA

Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more - we can innovate, invest, inspire and integrate our capabilities to transform the future.
At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We're creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We're erasing boundaries and forming partnerships across industries and around the world. We're advancing spacecraft and the workforce to fuel the next generation. And we're reimagining how space can connect us, ensuring security and prosperity.
Join us in shaping a new era in space and find a career that's built for you.
The Software Engineer Sr. is a senior individual contributor who contributes to the design, development, and delivery of complex software systems. You will collaborate with other team engineers, contribute to architectural decisions, and architects, collaborate cross-functionally to ensure high-quality, scalable, and secure software/systems solutions that align with business objectives.
- Design & Development: Architect, design, and implement high-performance, maintainable, and testable code in alignment with product roadmaps.
- Collaboration: Partner with product managers, UX designers, data scientists, and stakeholders to translate requirements into robust solutions.
-Quality Assurance: Contribute to the adoption of automated testing, CI/CD pipelines, and monitoring to ensure reliability and rapid feedback.
- Performance Optimization: Identify bottlenecks, conduct profiling, and implement optimizations for latency, throughput, and cost efficiency.
- Security & Compliance: Incorporate security best practices, perform threat modeling, and ensure compliance with relevant standards (e.g., ISO-27001, NIST).
- Innovation: Research emerging technologies, evaluate their applicability, and introduce innovative approaches where beneficial.
- Documentation: Produce clear technical documentation, design specifications, operational runbooks, etc..
Basic Qualifications
Master's or Bachelor's degree in Electrical Engineering, Mechanical Engineering, Software Engineering or Computer Science
Experience: 5+ years of professional software development experience
Technical Skills: Proficiency in one or more primary languages (e.g., C++, Java, Python)
Agile Mindset and Methods: Agile values and principle, Kanban/Scrum, Test Driven Development (TDD), DevOps
Soft Skills: Excellent verbal and written communication skills problem solver, team oriented, a generalist by nature
Interpreted Languages: Python or any other scripting languages (scripting, automation, test harnesses)
Operating Systems and Shell: Windows, Linux, Powershell, Bash
Object-Oriented Design: Ability to design, implement, and extend class hierarchies, apply SOLID principles, and write reusable components
Data Structures & Algorithms: Comfortable with common structures (lists, maps, trees, graphs) and algorithmic thinking (search, sort, recursion)
Version Control: Git (branching, merging, rebasing, pull-request workflow)
Build Systems: Basic knowledge of one or more of the following: CMake, Make, MSBuild, or Gradle; ability to create and maintain build scripts
Debugging & Profiling: Use of IDE debuggers
Test-Driven Development: Write unit tests (Boost, JUnit, PyTest, NUnit) and understand code coverage metrics
Continuous Integration: Familiarity with CI pipelines (Jenkins, Azure DevOps, GitLab CI) and automated build/test triggers
Code Reviews: Participate in peer reviews, give constructive feedback, and follow coding standards
Documentation: Produce clear design docs, inline code comments, and maintain wikis or Confluence pages
Configuration Management: Understand change-control processes (CRs, MRBs) and traceability requirements in regulated environments
IDE Proficiency: Visual Studio, CLion, VSCode, or Eclipse
Issue Tracking: JIRA or similar agile framework tooling
Collaboration: Experience working in cross-functional teams (hardware, systems, test) and communicating status effectively.
Agile Methodologies: Participation in sprint planning, daily stand-ups, retrospectives (Scrum/Kanban)
Problem-Solving: Ability to break down complex requirements into iteratively deliverable value units
Communication: Clear written and verbal updates to stakeholders; ability to produce concise design docs
Mentorship: Provide guidance to junior engineers and be receptive to feedback from seniors
Adaptability: Quickly learn new languages, frameworks, or domain knowledge as project evolves
Reliability & Accountability: Deliver high-quality code on schedule, understand impact of defects in safety-critical systems
No Clearance required to Start but must have the ability to obtain and maintain a Top Secret Clearance (Must be a US Citizen)
Desired skills
Experience developing for multiple processor architectures and platforms (e.g. x86, ARM, Versal ACAP)
Security Clearance Awareness: Knowledge of handling classified or export-controlled information per internal policies (no details disclosed)
Model-Based Development: Familiarity with tools such as MATLAB/Simulink, SysML or Model-Based Design flow (optional but a plus)
Real-time & Embedded Systems: Basics of RTOS concepts, scheduling, interrupt handling, and low-level hardware interaction
Networking & Protocols: Understanding of TCP/IP, UDP, and aerospace-specific protocols (e.g., ARINC429, MIL-STD-1553)
Static Analysis / Security: Familiarity wit static analysis tools (Cppcheck, SonarQube), understand basic secure-coding guidelines (e.g., OWASP, MISRA-C)
Active Top Secret Clearance
EEO
Lockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.
The application window will close in 90 days; applicants are encouraged to apply within 5 - 30 days of the requisition posting date in order to receive optimal consideration.
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At Lockheed Martin, we use our passion for purposeful innovation to help keep people safe and solve the world's most complex challenges. Our people are some of the greatest minds in the industry and truly make Lockheed Martin a great place to work.
With our employees as our priority, we provide diverse career opportunities designed to propel, develop, and boost agility. Our flexible schedules, competitive pay, and comprehensive benefits enable our employees to live a healthy, fulfilling life at and outside of work. We place an emphasis on empowering our employees by fostering an inclusive environment built upon integrity and corporate responsibility.
If this sounds like a culture you connect with, you're invited to apply for this role. Or, if you are unsure whether your experience aligns with the requirements of this position, we encourage you to search on Lockheed Martin Jobs, and apply for roles that align with your qualifications.
Other Important Information
By applying to this job, you are expressing interest in this position and could be considered for other career opportunities where similar skills and requirements have been identified as a match. Should this match be identified you may be contacted for this and future openings.
Work Schedule Information
Lockheed Martin supports a variety of alternate work schedules that provide additional flexibility to our employees. Schedules range from standard 40 hours over a five day work week while others may be condensed. These condensed schedules provide employees with additional time away from the office and are in addition to our Paid Time off benefits.
National Pay Statement
Pay Rate: The annual base salary range for this position in California, Massachusetts, and New York (excluding most major metropolitan areas), Colorado, Hawaii, Illinois, Maryland, Minnesota, New Jersey, Vermont, Washington or Washington DC is $93,200 - $164,450. For states not referenced above, the salary range for this position will reflect the candidate's final work location. Please note that the salary information is a general guideline only. Lockheed Martin considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/ training, key skills as well as market and business considerations when extending an offer.
Benefits offered: Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, 401(k) match, Flexible Spending Accounts, EAP, Education Assistance, Parental Leave, Paid time off, and Holidays.
(Washington state applicants only) Non-represented full-time employees: accrue at least 10 hours per month of Paid Time Off (PTO) to be used for incidental absences and other reasons; receive at least 90 hours for holidays. Represented full time employees accrue 6.67 hours of Vacation per month; accrue up to 52 hours of sick leave annually; receive at least 96 hours for holidays. PTO, Vacation, sick leave, and holiday hours are prorated based on start date during the calendar year.
This position is incentive plan eligible.
Premium Pay Statement
Pay Rate: The annual base salary range for this position in most major metropolitan areas in California, Massachusetts, and New York is $107,300 - $185,840. For states not referenced above, the salary range for this position will reflect the candidate's final work location. Please note that the salary information is a general guideline only. Lockheed Martin considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/ training, key skills as well as market and business considerations when extending an offer.
Benefits offered: Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, 401(k) match, Flexible Spending Accounts, EAP, Education Assistance, Parental Leave, Paid time off, and Holidays.
This position is incentive plan eligible.