Senior Full Stack Engineer, Commerce

Calendly

117d • $187,000 - $283,800

About The Position

Calendly is looking for a Senior Full Stack Engineer for the Commerce Squad who brings strong user empathy, clear product intuition, and solid engineering skills. This role involves shipping high-impact features quickly and safely to support revenue growth and a best-in-class commerce experience. The team values an entrepreneurial approach and scrappy execution, focusing on pragmatic trade-offs and iterative experimentation that deliver user value fast. Engineers are expected to leverage AI in their daily workflow to increase velocity and quality while exercising sound judgment and following company AI usage guidelines.

Requirements

• 7+ years of professional software development experience in a SaaS or technology-driven environment, with a track record of owning systems and features end-to-end.
• Strong proficiency in React and TypeScript for modern front-end web development, supporting end-to-end feature delivery.
• Strong proficiency in backend engineering with Node.js and/or Ruby on Rails including building and maintaining scalable services and APIs that are observable, reliable, and secure.
• Experience with PostgreSQL, including schema design, query optimization, and data modeling for transactional systems.
• Experience designing and consuming GraphQL APIs in production environments.
• Background in mixed stack environments, such as Node.js services interfacing with a Ruby on Rails monolithic API.
• Hands-on experience with Service Oriented Architecture (SOA), microservices, and involvement in monolith-to-services modernization or large-scale refactoring initiatives.
• Proven ability to lead technical discovery and design, decompose complex problems, and deliver small, incremental, high-quality releases.
• Demonstrated mentorship and coaching of other engineers, including elevating standards through design reviews, documentation, and reusable patterns.
• Strong analytical and problem-solving skills, with the ability to dissect complex systems, identify root causes, and deliver scalable, maintainable solutions.
• A commitment to writing clean, reliable, and maintainable code, with an emphasis on readability, simplicity, and performance.
• Adaptability to new technologies, evolving architectural patterns, and changing organizational priorities.
• Availability for participation in an on-call rotation, ensuring timely and effective responses to critical production issues outside of regular working hours.
• Comfort and proficiency using AI tools in engineering workflows to increase velocity and quality.

Nice To Haves

• Experience with Google Cloud Platform, Kubernetes, Argo Workflows.
• Familiarity with agile methodologies and practices.

Responsibilities

• Lead design and delivery of commerce features that drive measurable business impact for both self-serve and enterprise customers, owning outcomes end-to-end.
• Guide platform scaling initiatives, improving reliability and performance in user-critical flows, and raising quality bars through robust instrumentation.
• Partner with Product and Design to clarify requirements, define MVPs, and instrument experiments that validate value quickly.
• Attend agile ceremonies and help the team make predictable, incremental progress with clear priorities and limited WIP.
• Collaborate across squads to improve engineering practices, evolve monorepo tooling, define service boundaries, and reduce operational toil.
• Review and author implementation plans and pull requests with a focus on simplicity, maintainability, observability, and incremental delivery.
• Mentor and coach engineers through pairing, technical design reviews, thoughtful feedback, and structured growth guidance.
• Use AI assistants thoughtfully to scaffold code, generate tests, draft documentation, analyze logs, and accelerate experiments.

Benefits

• Top Performer Bonus program (or Sales incentive)
• Equity awards
• Competitive benefits

What This Job Offers

• Job Type: Full-time
• Career Level: Senior