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Senior Python Developer Jobs in Chelmsford, MA (NOW HIRING)

Worldpay

Senior Python Software Engineer

Boston, MA · On-site

$119K - $179.75K/yr

We're looking for a Senior Python Engineer to join our ever evolving Pazien team and help us unleash the potential of every business. The Pazien engineering team is seeking a Platform engineer who ...

Worldpay

Senior Python Software Engineer

Boston, MA · On-site

$119K - $179.75K/yr

Whatyou'llownas theSenior Python Engineer * Designing, programming,debuggingandmodifyingsoftware enhancements. * Interactingwith product managers and users to define requirements and modifications.

TriOptus LLC

Python Full Stack Developer

Boston, MA · On-site

This role is ideal for a Lead or Senior Engineer who thrives as an individual contributor and wants ... Experience with key Python Libraries (pandas, NumPy) required * Experience in frontend development ...

Ecovent

Senior Software Engineer

Boston, MA

$133.10K - $175.50K/yr

Are you an experienced full-stack Python developer who can solve tough technical problems ... Our Senior Software Engineer role can jump into many technical areas, design and implement clean ...

Code Metal

Senior Software Engineer - Python

Boston, MA · On-site +1

$133.10K - $175.50K/yr

Senior Software Engineer - Python AI Pipelines We are looking for a Senior Software Engineer to help build a new generation of transpilation tools powered by AI and modern verification techniques.

Code Metal

Senior Software Engineer - Python

Boston, MA · Remote

$125.40K - $165.30K/yr

Senior Software Engineer - Python AI Pipelines We are looking for a Senior Software Engineer to help build a new generation of transpilation tools powered by AI and modern verification techniques.

Code Metal

Senior Software Engineer - Python

Boston, MA

$133.10K - $175.50K/yr

Senior Software Engineer - Python AI Pipelines We are looking for a Senior Software Engineer to help build a new generation of transpilation tools powered by AI and modern verification techniques.

Code Metal

Senior Software Engineer - Rust and Python

Boston, MA · On-site

$133.10K - $175.50K/yr

We're looking for a Senior Software Engineer with strong Rust and Python expertise and a product-focused mindset to help build a new class of AI-powered transpilation and code generation tools. These ...

Code Metal

Senior Software Engineer - Rust and Python

Boston, MA · On-site

$133.10K - $175.50K/yr

We're looking for a Senior Software Engineer with strong Rust and Python expertise and a product-focused mindset to help build a new class of AI-powered transpilation and code generation tools. These ...

Code Metal

Senior Software Engineer - Rust and Python

Boston, MA · Hybrid

$133.10K - $175.50K/yr

We're looking for a Senior Software Engineer with strong Rust and Python expertise and a product-focused mindset to help build a new class of AI-powered transpilation and code generation tools. These ...

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Senior Python Developer information

See Chelmsford, MA salary details

$57.1K

$147.5K

$202.6K

How much do senior python developer jobs pay per year?

As of May 29, 2026, the average yearly pay for senior python developer in Chelmsford, MA is $147,514.00, according to ZipRecruiter salary data. Most workers in this role earn between $126,200.00 and $169,900.00 per year, depending on experience, location, and employer.

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 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 job categories do people searching Senior Python Developer jobs in Chelmsford, MA look for? The top searched job categories for Senior Python Developer jobs in Chelmsford, MA are:
What cities near Chelmsford, MA are hiring for Senior Python Developer jobs? Cities near Chelmsford, MA with the most Senior Python Developer job openings:
Senior Python Developer jobs near you
Infographic showing various Senior Python Developer job openings in Chelmsford, MA as of May 2026, with employment types broken down into 78% Full Time, 15% Part Time, and 7% Contract. Highlights an 92% Physical, 5% Hybrid, and 3% Remote job distribution, with an average salary of $147,514 per year, or $70.9 per hour.
Senior Python Software Engineer

Senior Python Software Engineer

Worldpay

Boston, MA • On-site

$119K - $179.75K/yr

Full-time

Posted 10 days ago

Job description

Job Description
This position is not eligible for visa sponsorship, now or in the future. Candidates must be a US Citizen or Green Card Holder.
This position is remote within the Greater Boston, MA area only.
Are you ready to write your next chapter?
Make your mark at one of the biggest names in payments. We're looking for a Senior Python Engineer to join our ever evolving Pazien team and help us unleash the potential of every business.
The Pazien engineering team is seeking a Platform engineer who can build out our product platform using cutting edge technologies. The platform encompasses all data acquisition, data pipeline, and all API's. You'll be joining a small team working on expanding a new reporting and analytics product to drastically simplify the payments ecosystem for ecommerce merchants.
What you'll own as the Senior Python Engineer
  • Designing, programming, debugging and modifying software enhancements.

  • Interacting with product managers and users to define requirements and modifications.

  • Participating in software design meetings to determine technical requirements.

  • Working with internal Client Training, Client Relationship and Sales teams.

What you'll bring
  • A Bachelor's in computer engineering, computer science or other related discipline or equivalent experience plus 5+ years of experience

  • Experience with end-to-end system development life cycles and standards.

  • Knowledge of at least one programming language (we use Python 3)

  • Experience with at least one database, SQL or NoSQL

  • Experience writing both functional and unit tests, experience with mocking a big plus

  • Experience writing scalable backend services that run in a production setting

  • Experience reviewing and critiquing code of others

  • Proficiency in a Unix environment (we run on Ubuntu in AWS)

  • Knowledge of financial industry practices, regulations and operations.

  • Fluency in sequence diagrams, class models, etc.

  • Proficiency in solutions design and requirements definition disciplines.

It's a bonus if you have
  • Experience handling large quantities of data

  • Experience with NoSQL (We use MongoDB)

  • Experience building applications in python

  • Familiarity with test-driven development and continuous integration (Grunt/Git/Jenkins)

About the team
To learn more about our winning teams, check out our world-class teams that own it every day.
What makes a Worldpayer
What makes a Worldpayer? It's simple: Think, Act, Win. We stay curious, always asking the right questions and finding creative solutions to simplify the complex. We're dynamic, every Worldpayer is empowered to make the right decisions for their customers. And we're determined, always staying open and winning and failing as one.
Does this sound like you? Then you sound like a Worldpayer. Apply now to write the next chapter in your career.
#LI-AD1
Worldpay is dedicated to offering individuals rewarding career opportunities and competitive compensation. For this full-time position, the good faith estimated annual salary range upon hire is $119,000.00-$179,750.00. This range reflects what we reasonably expect to offer based on the role's responsibilities, level, and geographic location. The actual starting salary will be determined by a candidate's experience, job-related skills, and relevant education or training. Please note that changes in work location may impact the final offered salary. We encourage you to consult with your recruiter to confirm the budget for your location and to better understand the applicable pay scale.
EEOC Statement
Worldpay is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, marital status, genetic information, national origin, disability, veteran status, and other protected characteristics. The EEO is the Law poster is available here.
If you are made a conditional offer of employment and will be working in the United States, you will be required to undergo a drug test. In developing this job description care was taken to include all competencies and requirements needed to successfully perform the position. Reasonable accommodations will be provided for individuals with qualified disabilities both during the hiring process, as well as to allow the individual to perform the essential functions of the job, if hired.

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