Python developer Jobs in Lynn, MA

A leading investment and capital management firm is continuing to modernize its technology platform and is seeking a Senior Software Developer in Test (SDET) to help drive software quality across its cloud-native trading, portfolio management, and financial systems. This is an opportunity to join a highly collaborative engineering organization where quality is treated as a core engineering discipline rather than a separate QA function.

This role is ideal for an experienced automation engineer who enjoys writing production-quality code, building scalable test frameworks from scratch, and partnering closely with software engineers throughout the SDLC. You'll help define the automation strategy for mission-critical financial applications while working with modern cloud technologies, distributed systems, and CI/CD pipelines.

Required Skills & Experience

• 6+ years of experience as a Software Developer in Test (SDET), QA Automation Engineer, or Software Engineer focused on test automation
• Expert-level Python programming skills
• Extensive experience building and maintaining automation frameworks using PyTest
• Experience developing automated API, integration, regression, and end-to-end test suites
• Strong understanding of object-oriented programming and software engineering best practices
• Experience testing cloud-native applications deployed in AWS, Azure, or Google Cloud Platform
• Experience integrating automated testing into CI/CD pipelines
• Strong experience with REST APIs, JSON, and API automation tools
• Solid understanding of SQL and database validation techniques
• Experience working within Agile software development environments
• Excellent analytical, troubleshooting, and communication skills

Desired Skills & Experience

• Experience within investment management, asset management, hedge funds, financial services, or fintech
• Experience with Playwright, Selenium, or modern UI automation frameworks
• Familiarity with Docker, Kubernetes, and containerized applications
• Experience testing distributed systems, microservices, and event-driven architectures
• Exposure to Kafka, RabbitMQ, or messaging platforms
• Experience with performance testing tools such as k6, JMeter, or Locust
• Familiarity with GitHub Actions, Jenkins, GitLab CI, or Azure DevOps
• Experience mentoring junior automation engineers
• Bachelor's degree in Computer Science, Engineering, or a related technical discipline

What You Will Be Doing

• Design, develop, and maintain enterprise-grade automation frameworks using Python and PyTest
• Build automated testing solutions for APIs, backend services, web applications, and cloud platforms
• Partner closely with Software Engineers throughout the development lifecycle to improve software quality
• Create reusable automation libraries and testing utilities that scale across multiple engineering teams
• Develop automated regression, smoke, functional, integration, and end-to-end test suites
• Integrate automated testing into CI/CD pipelines to support continuous delivery
• Identify quality gaps early through automation and proactive testing strategies
• Debug complex software issues and work alongside developers to resolve production defects
• Contribute to automation standards, coding best practices, and quality engineering initiatives
• Continuously evaluate new testing tools and technologies to improve engineering efficiency

Tech Breakdown

• 45% Python & PyTest Automation Development
• 25% API & Backend Testing
• 20% Cloud, CI/CD & DevOps Integration
• 10% Test Strategy & Quality Engineering

Daily Responsibilities

• 80% Hands-On Automation Development
• 10% Cross-Functional Collaboration
• 10% Test Strategy, Code Reviews & Mentorship

The Offer

You will receive the following benefits:

• Competitive base salary
• Annual discretionary bonus
• Medical, Dental, and Vision insurance
• 401(k) with company match
• Paid Time Off and company holidays
• Professional development and certification reimbursement
• Hybrid work environment
• Opportunity to build next-generation automation frameworks supporting mission-critical financial applications

Applicants must be currently authorized to work in the United States on a full-time basis now and in the future. No sponsorship is available for this position.