Senior Full-Stack Engineer (React & Python)

Responsibilities:

• Build and lead frontend architecture using React, MUI, and high-fidelity Figma design integrations
• Own full stack feature delivery with Python on AWS serverless (Lambda) and clean GraphQL API integration
• Work closely with Product and Design Agency to define roadmaps, create epics & stories,
• Architect and integrate GraphQL APIs to power dynamic content and product experiences across the platform
• Collaborate on AI-powered features and intelligent automation interfaces, with rigor in verifying AI-assisted work
• Mentor junior engineers, model clean code and BDD/TDD practices, and elevate team performance
• Integrate with our fully automated CI/CD pipeline (CircleCI, GitHub Actions)
• Help shape our design system and contribute to a scalable, componentized UI foundation

Qualifications:

• 5+ years full stack development experience - focus on React and Python/AWS serverless
• Strong testing and clean coding mindset (BDD, TDD, SOLID)
• DevOps-aware mindset (CI/CD with CircleCI and GitHub Actions, observability with Datadog or equivalent, rollback readiness)
• Background in AI-powered features and intelligent UI flows
• Experience leading product delivery: roadmaps, epics, planning, collaboration
• Experience building and supporting distributed, event-driven systems, including integrations with third-party services and designing for resilience and failure recovery.
• Strong sense of production ownership, including deployment, monitoring, incident management, and operational support.
• Solid testing and verification mindset, with a focus on delivering reliable, high-quality software in environments where accuracy and correctness are critical.
• Experience using AI-powered tools

Benefits:

• A flexible work philosophy
• Company paid private health insurance
• Company paid life and disability insurance
• Paid leave for illness, birth parents, non-birth parents, elder caregivers, marriage, adoption of a child and bereavement
• Inclusive and accessible Employee Assistance Program (EAP) to help with everyday challenges
• Christmas and Easter bonuses
• Opportunity for strengthening expertise and skills through Paychex’s learning platform, including lessons in English