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Senior Python Developer Jobs in Crystal Lake, IL

Founding Sr. Software Engineer

Elk Grove Village, IL · Hybrid

$120K - $159K/yr

... role for a senior IC who wants to operate in a founding engineer capacity, owning product ... Full-stack experience with backend systems such as Python, Django, Go, or similar. * Proven ability ...

Founding Sr. Software Engineer

Elk Grove Village, IL · Hybrid

$120K - $159K/yr

... role for a senior IC who wants to operate in a founding engineer capacity, owning product ... Full-stack experience with backend systems such as Python, Django, Go, or similar. * Proven ability ...

Cloud, Container & DevOps Testing * Test applications deployed as Docker containers across multiple ... Selenium, Python, Java * API & backend testing * Test design for distributed systems * Experience ...

Senior Data Engineer

Arlington Heights, IL · Hybrid

$106K - $144K/yr

Python, PySpark, Spark SQL, SQL Server * Azure (ADF, ADLS Gen2, Key Vault, Azure Monitor ... Git / Azure DevOps * Deep Spark internals (DAG optimization, spill analysis, skew handling) * Delta ...

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Senior Python Developer information

See Crystal Lake, IL salary details

$53.3K

$137.7K

$189.1K

How much do senior python developer jobs pay per year?

As of Jul 13, 2026, the average yearly pay for senior python developer in Crystal Lake, IL is $137,685.00, according to ZipRecruiter salary data. Most workers in this role earn between $117,800.00 and $158,600.00 per year, depending on experience, location, and employer.

What are the main responsibilities of a Senior Python Developer?

A Senior Python Developer is responsible for designing, developing, and maintaining complex software applications using the Python programming language. They lead the technical aspects of projects, mentor junior developers, and ensure code quality through code reviews and best practices. Additionally, they collaborate with cross-functional teams to gather requirements, solve technical challenges, and deploy scalable and efficient solutions. Senior Python Developers are also expected to stay updated with the latest trends and advancements in Python and related technologies.

What is the difference between Senior Python Developer vs Python Developer?

AspectSenior Python DeveloperPython Developer
Required ExperienceTypically 5+ years, with leadership and complex project experienceUsually 1-3 years, focusing on core Python skills
ResponsibilitiesDesigning architecture, mentoring, handling complex systemsWriting code, debugging, implementing features
CertificationsOptional but beneficial (e.g., Python certifications, cloud certs)Often not required
Work EnvironmentCollaborative teams, project planning, code reviewsDevelopment-focused, task-oriented

The main difference between a Senior Python Developer and a Python Developer lies in experience, responsibilities, and leadership. Senior developers handle complex projects, mentor others, and often participate in architecture decisions, while Python Developers focus on coding and feature implementation. Both roles are essential in tech companies, but the senior role requires more experience and broader skills.

What are the key skills and qualifications needed to thrive as a Senior Python Developer, and why are they important?

To thrive as a Senior Python Developer, you need advanced proficiency in Python programming, experience with software architecture, and a solid understanding of algorithms and data structures, usually backed by a degree in computer science or related fields. Familiarity with frameworks like Django or Flask, version control systems such as Git, and containerization tools like Docker are typically required, alongside knowledge of modern CI/CD pipelines. Strong problem-solving abilities, effective communication, and leadership skills help you collaborate with teams and mentor junior developers. Mastery of these skills ensures the delivery of scalable, maintainable software solutions and the ability to drive technical excellence within development teams.

What are some common challenges faced by Senior Python Developers when leading a development team?

Senior Python Developers often encounter challenges such as balancing hands-on coding with mentoring junior team members and ensuring code quality across the team. They are also responsible for making architectural decisions, which requires staying updated on best practices and emerging Python frameworks. Additionally, coordinating collaboration between cross-functional teams (like DevOps, QA, and front-end developers) can be complex, especially in agile environments where requirements may shift rapidly. Overcoming these challenges helps foster a productive and innovative team culture.
What are the most commonly searched types of Python Developer jobs in Crystal Lake, IL? The most popular types of Python Developer jobs in Crystal Lake, IL are:
What are popular job titles related to Senior Python Developer jobs in Crystal Lake, IL? For Senior Python Developer jobs in Crystal Lake, IL, the most frequently searched job titles are:
What cities near Crystal Lake, IL are hiring for Senior Python Developer jobs? Cities near Crystal Lake, IL with the most Senior Python Developer job openings:
Principal/Sr. Principal Systems Engineer

Principal/Sr. Principal Systems Engineer

Northrop Grumman Corporation

Rolling Meadows, IL • On-site

Full-time

Medical, Life, PTO

Posted 5 days ago


Northrop Grumman rating

8.1

Company rating: 8.1 out of 10

Based on 352 frontline employees who took The Breakroom Quiz

107th of 527 rated manufacturers


Job description

RELOCATION ASSISTANCE: Relocation assistance may be available
CLEARANCE REQUIRED FOR START: Yes
CLEARANCE TYPE: Top 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 Mission Systems (NGMS) seeks to fill a Principal/Sr. Principal Systems Engineer position in the Mission Modeling Department at our Rolling Meadows, Illinois location. This role encompasses team leadership, management, and technical performance. Department assignments will be made at the conclusion of the interview process and be based on the candidate's fit and preference.
NGMS is a leading global provider, manufacturer and integrator of advanced, secure and agile software-defined systems and solutions. Our products range from advanced sensing technologies to state-of-the-art targeting and tracking systems that are deployed in Electro-Optical Infrared (EOIR) tracking and counter measures and Radio Frequency Electronic Warfare (RFEW) systems. Our SEIT organization provides complex avionics systems in Targeting, EOIR, and RF technology areas.
In the Mission Modeling department, you will develop, integrate, test and analyze complex virtual representations of systems and environments. Responsibilities may include development of simulation code and scripts, design of system models, documentation of model assumptions and performance, test automation, test reports, and execution of integration test activities in virtual environments and/or System Integration Labs (SILs) or offsite locations. You will also perform mission level operational analysis utilizing System of Systems modeling and agent-based simulation. You'll be able to apply your knowledge and experience in EOIR systems, optics, RF systems, algorithms, detection and tracking.
This position will be full-time, on-site at our Rolling Meadows, IL location.
This position is contingent upon Funding/Contract award, special access programs and acquiring and maintaining the necessary US Government security clearance per customers' requirements prior to start.
This position can be filled at the Principal Systems Engineer or Sr. Principal Systems Engineer level based on specific requirements listed below.
Basic Qualifications for Principal Systems Engineer:
  • Bachelor's degree in a Science, Technology, Engineering, or Mathematics (STEM) field with 5 years of related experience; OR a Master's degree in a STEM field with 3 years of related experience; OR PhD in a STEM field with 1 years of related experience.
  • Demonstrated proficiency in analytical thinking, problem solving skills and Systems thinking mindset
  • Knowledge of and experience in model-based systems engineering concepts such as SysML and tools such as Cameo and Rhapsody
  • Knowledge of and experience in MATLAB, C, C++, CUDA, VHDL, OpenCL, SysML, Python, or other scripting languages
  • Experience with virtual environments, operational analysis or mission modeling (AFSIM, STK, BRAWLER, ATCOM, ONESAF)
  • Ability to work and lead engineers in an integrated product team (IPT) environment
  • US Citizenship required
  • Current Active Top-Secret Clearance

Basic Qualifications for Sr. Principal Systems Engineer:
  • Bachelor's degree in a Science, Technology, Engineering, or Mathematics (STEM) field with 8 years of related experience; OR a Master's degree in a STEM field with 6 years of related experience; OR PhD in a STEM field with 4 years of related experience.
  • Demonstrated proficiency in analytical thinking, problem solving skills and Systems thinking mindset
  • Knowledge of and experience in model-based systems engineering concepts such as SysML and tools such as Cameo and Rhapsody
  • Knowledge of and experience in MATLAB, C, C++, CUDA, VHDL, OpenCL, SysML, Python, or other scripting languages
  • Experience with virtual environments, operational analysis or mission modeling (AFSIM, STK, BRAWLER, ATCOM, ONESAF)
  • Ability to work and lead engineers in an integrated product team (IPT) environment
  • US Citizenship required
  • Current Active Top-Secret Clearance

Preferred Qualifications for Principal/Sr. Principal Systems Engineer:
  • Experience with real-time signal processing in both firmware and software
  • Agile development experience
  • Experience in Electronic Warfare
  • Experience in an abstract modeling environment (Rhapsody, Cameo, UML etc) for complex electronic systems evaluation
  • Experience performing system verification and validation
  • Working knowledge of EOIR systems, optics, RF systems, algorithms, detection and/or tracking
  • Proficiency in MATLAB, C, C++, CUDA, VHDL, OpenCL, SysML, Python, or other scripting languages
  • Working knowledge of DOORS and ClearCase/ClearQuest
  • Experience in an integration and test environment for complex electronic systems evaluation
  • Experience in development and earned value management of cost accounts and schedules as related to Systems Engineering tasks

Primary Level Salary Range: $108,800.00 - $163,200.00
Secondary Level Salary Range: $135,800.00 - $203,600.00
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