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Senior Python Developer Jobs in Modesto, CA (NOW HIRING)

L2 - Test Engineer

Atwater, CA · On-site

$120K - $137K/yr

Senior Test Engineer shall manage and execute test programs, analyze and interpret results, and ... Test scripting understanding/execution for in-vehicle test automation (including C/C++, Python ...

New

Senior Test Engineer shall manage and execute test programs, analyze and interpret results, and ... Test scripting understanding/execution for in-vehicle test automation (including C/C++, Python ...

New

System Engineer

Lathrop, CA · On-site

$71 - $107/hr

Act as a senior technical escalation point during system disruptions or downtime events. * Partner ... Working knowledge of SQL, Python, and Linux for diagnostics, log review, and system interaction.

Process Engineer Lead

Patterson, CA · On-site

$95K - $158K/yr

The position oversees large-scale projects, mentors senior engineers, and drives innovation through ... SQL, Python, Java, or Scala preferred. * Experience with the design & implementation of automation ...

The position oversees large-scale projects, mentors senior engineers, and drives innovation through ... SQL, Python, Java, or Scala preferred. * Experience with the design & implementation of automation ...

Process Engineer Lead

Patterson, CA · On-site

$95K - $158K/yr

The position oversees large-scale projects, mentors senior engineers, and drives innovation through ... SQL, Python, Java, or Scala preferred. * Experience with the design & implementation of automation ...

Act as a senior technical escalation point during system disruptions or downtime events. * Partner ... Working knowledge of SQL, Python, and Linux for diagnostics, log review, and system interaction.

Act as a senior technical escalation point during system disruptions or downtime events. * Partner ... Working knowledge of SQL, Python, and Linux for diagnostics, log review, and system interaction.

System Engineer

Lathrop, CA · On-site

$71 - $107/hr

Act as a senior technical escalation point during system disruptions or downtime events. * Partner ... Working knowledge of SQL, Python, and Linux for diagnostics, log review, and system interaction.

Senior Python Developer information

See Modesto, CA salary details

$58K

$149.8K

$205.7K

How much do senior python developer jobs pay per year?

As of Aug 19, 2026, the average yearly pay for senior python developer in Modesto, CA is $149,785.00, according to ZipRecruiter salary data. Most workers in this role earn between $128,200.00 and $172,500.00 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 are the key skills and qualifications needed to thrive as a senior Python developer?

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 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.

Are senior Python developers still in demand?

Senior Python developers remain in high demand due to the language's versatility in web development, data analysis, machine learning, and automation. Companies seek experienced developers with skills in frameworks like Django or Flask, and proficiency in cloud platforms and APIs enhances job prospects.

How much does a senior Python developer make?

A senior Python developer typically earns between $100,000 and $150,000 annually, depending on experience, location, and industry. They often possess strong skills in frameworks like Django or Flask and may hold certifications or advanced degrees that influence salary levels.

What does a senior Python developer do?

A senior Python developer designs, develops, and maintains complex software applications using Python. They often lead projects, review code, optimize performance, and collaborate with cross-functional teams, requiring strong problem-solving skills and knowledge of frameworks like Django or Flask. Additionally, they may mentor junior developers and ensure code quality through testing and best practices.

What are the most commonly searched types of Python Developer jobs in Modesto, CA?

The most popular types of Python Developer jobs in Modesto, CA are:

What are popular job titles related to Senior Python Developer jobs in Modesto, CA?

For Senior Python Developer jobs in Modesto, CA, the most frequently searched job titles are:

What job categories do people searching Senior Python Developer jobs in Modesto, CA look for?

The top searched job categories for Senior Python Developer jobs in Modesto, CA are:

What cities near Modesto, CA are hiring for Senior Python Developer jobs?

Cities near Modesto, CA with the most Senior Python Developer job openings:

Infographic showing various Senior Python Developer job openings in Modesto, CA as of August 2026, with employment types broken down into 1% Internship, 79% Full Time, 15% Part Time, and 5% Contract. Highlights an 76% Physical, 7% Hybrid, and 17% Remote job distribution, with an average salary of $149,785 per year, or $72 per hour.

L2 - Test Engineer

Transdev

Atwater, CA • On-site

$120K - $137K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 2 days ago

New


Transdev North America rating

6.5

Company rating: 6.5 out of 10

Based on 264 frontline employees who took The Breakroom Quiz

78th of 98 rated public transport


Job description

Transdev Alternative Services in Atwater, CA, is hiring a Senior Systems Test Engineer. Senior Systems Test Engineer shall be responsible for the evaluation of systems and/or features, as well as developing and maintaining evaluation methods. Senior Test Engineer shall manage and execute test programs, analyze and interpret results, and communicate results and findings. Senior Engineer shall also develop new test methods to improve the quality and scalability of those methods.
Transdev is proud to offer:
  • Competitive compensation package of minimum $120,640 to maximum $137,280

Benefits include:
  • Benefits package: medical, dental, and vision
  • Vacation: minimum of two (2) weeks
  • Sick days: 5 days
  • Holidays: 6 days
  • Other standard benefits: 401(k) retirement plan, life insurance, short-term disability & long-term disability

Key Responsibilities:
  • Decompose system requirements and consequently design test plans and verification strategies that give Waymo the necessary evidence to release the product / service
  • Improve the quality and coverage of the verification of a system.
  • Build new processes that improve organization, traceability, and clarity
  • Develop new tools that improve the repeatability, efficiency, or completeness of testing
  • Create new test frameworks and capabilities, including simulation-based, hardware-in-the-loop, or other methods
  • Identify missing or untestable requirements, gaps in design, and incomplete implementation
  • Develop novel approaches to evaluate the system
  • Develop and improve processes that increase operational efficiency of test execution
  • Debug and resolve test-related failures, contribute to the root cause analysis of system-related failures
  • Communicate results and test status. Build dashboards and other visualizations within existing toolsets to make it easier for all stakeholders to interpret test results.
  • Provide technical guidance to the test team comprised of Test Conductors, Vehicle Operators, Test Assistants
  • Lead the execution of vehicle and/or functional and performance test workstreams. (Define project priorities, tasks and coordinate activities, deliverables, schedules, and delegate work to support staff when necessary/appropriate.)
  • Mentor and train team members by providing guidance and training in testing methodologies, tools, and best practices to build team expertise
  • Coordinate efforts to leverage external resources or expertise for comprehensive system validation testing
  • Use simulation tools to model complex scenarios and test system behavior under various conditions, ensuring comprehensive validation of vehicle performance
  • Diagnose and troubleshoot issues related to autonomous vehicle performance, including sensor discrepancies, software anomalies, and system integrations, to identify root causes and recommend solutions
  • Apply Waymo policies, procedures, standards, and code of conduct throughout
  • Support other general structured testing as needed
  • All other duties as assigned

Required Knowledge, Skills and Abilities (KSAs):
  • In-depth knowledge of vehicle systems and subsystems
  • Ability to travel (> 10%) and ability to travel on short notice
  • Demonstrate concise and effective communication both verbally and in writing
  • Possess operational skills and be knowledgeable with systems engineering processes
  • Be organized, detail-oriented, and a fast learner
  • Work independently in ambiguous conditions
  • Thrive in a fast-paced environment

Physical Requirements:
  • Required to talk, listen, and hear
  • Frequently required to use repetitive hand motion, hands to finger, handle or feel, and to sit, stand, walk, reach, bend, regularly push, pull and lift up to 50 pounds;
  • Occasionally climb stairs and/or ladders;
  • Must use close vision, distance vision, peripheral vision, depth perception, and ability to adjust focus; and
  • Most work is accomplished outdoors.

Required Education and Experience:
  • Bachelors/ Masters Degree in a technical field (ME, EE, CS, Robotics, Controls, Aerospace)
  • 4+ years of systems test experience
  • Experience with system engineering principles such as defining requirements and formal verification and validation methods
  • Test scripting understanding/execution for in-vehicle test automation (including C/C++, Python, Matlab/Simulink)
  • Demonstrated ability to interact with functional and technical counterparts to ensure system tests meet all required specifications
  • Demonstrated communication and project management skills

Pre-Employment Requirements:
  • All Transdev employees must satisfactorily complete a pre-employment drug screen and pre-employment background check.
  • Applicants must be legally authorized to work in the United States at the time of hire. This position does not provide current or future employment visa sponsorship

Transdev maintains a drug-free workplace. Applicants must:
  • Successfully pass a pre-employment drug screen.

Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions. Transdev complies with federal and state disability laws and makes reasonable accommodation for applicants and 29 candidates with disabilities. If reasonable accommodation is needed to participate in the job application or interview process, please contact us.HR.TalentAcquisition@transdev.com
About Transdev: Cities, counties, airports, companies, and universities across the U.S. contract with Transdev to operate their transportation systems, maintain their vehicle and fleets, and deliver on mobility solutions. Transdev U.S. employs a team of 32,000 across 400 locations while maintaining more than 17,000 vehicles. Part of a global company, Transdev is a leader in mobility with operations in 19 countries, proudly operated by 110,000 team members from around the world. As an operator and global integrator of mobility, we are driven by our purpose. Transdev - the mobility company - empowers the freedom to move everyday thanks to safe, reliable, and innovative solutions that serve the common good. Find out more at www.TransdevNA.com or watch an overview video at https://youtu.be/ilO5cv0G4mQ
The above statements are intended to describe the general nature and level of work being performed by people assigned to this classification. They are not intended to be construed as an exhaustive list of all responsibilities, duties, and skills required of personnel so classified. The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions upon request.
Transdev is an Equal Employment Opportunity (EEO) employer and welcomes all qualified applicants. Applicants will receive fair and impartial consideration without regard to race, sex, color, national origin, age, disability, veteran status, genetic data, gender identity, sexual orientation, religion or other legally protected status.
California applicants: Please Click Here for CA Employee Privacy Policy
Job Category: Professionals
Job Type: Full Time
Req ID: 8832
Pay Group: A3L
Cost Center: 563
The above statements are intended to describe the general nature and level of work being performed by people assigned to this classification. They are not intended to be construed as an exhaustive list of all responsibilities, duties, and skills required of personnel so classified.
The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions upon request.
Transdev is an Equal Employment Opportunity (EEO) employer and welcomes all qualified applicants. Applicants will receive fair and impartial consideration without regard to race, sex, color, national origin, age, disability, veteran status, genetic data, gender identity, sexual orientation, religion or other legally protected status, or any other classification protected by federal, state, or local law.
Drug-free workplace
If based in the United States, applicants must be eligible to work in U.S. without restrictions for any employer at any time; be able to pass a drug screen and background check.
California applicants: Please Click Here for CA Employee Privacy Policy.
About Transdev
Cities, counties, airports, companies, and universities across the U.S. contract with Transdev to operate their transportation systems, maintain their vehicle and fleets, and deliver on mobility solutions. Transdev U.S. employs a team of 32,000 across 400 locations while maintaining more than 17,000 vehicles.
Part of a global company, Transdev is a leader in mobility with operations in 19 countries, proudly operated by 110,000 team members from around the world. As an operator and global integrator of mobility, we are driven by our purpose. Transdev - the mobility company - empowers the freedom to move every day thank to safe, reliable, and innovative solutions that serve the common good. Find out more at http://www.TransdevNA.com or watch an overview video .

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