Staff Software Engineer, Backend

The role

You will own and evolve the back-end service for user progress, guides, and survey data. You will work across the full system including infrastructure, back-end services, and JavaScript to turn product ideas into designs.

What you will do

• Own and evolve the back-end service for user progress, guides, and survey data
• Lead large cross-team strategic initiatives
• Clarify product vision and write design docs with product managers and designers
• Deliver end to end across infrastructure, back-end services, JavaScript guides snippet, and React-based editor
• Share an on-call rotation to triage issues and debug across client and server
• Mentor engineers and raise the bar on code review and engineering workflows
• Run proofs of concept for new technology
• Partner with other staff engineers on company-wide initiatives
• Use AI tools for design, coding, code review, debugging, and test planning
• Help shape AI-driven features for customers

Required qualifications

• Designed, built, and operated complex back-end systems in production
• Written technical design docs
• Led architecture decisions
• Mentored other engineers
• Shipped front-end work in JavaScript
• English fluency (speaking, reading, writing)
• Bachelor's degree in computer science or a related field

Nice to have

• experience migrating a legacy service to a new stack
• building in-app guidance or survey products
• working on real-time, client-side experiences

Benefits

• Flexible PTO policy
• Annual company-wide closure
• Federal holidays
• Sponsored benefit packages for US-based Fullstorians
• Supplemental coverage options for international Fullstorians
• Professional development opportunities through training programs
• Annual learning subsidy for US and EMEA-based employees
• Monthly productivity stipend for US and EMEA-based Fullstorians
• Team off-sites
• Annual full-company meet-up
• Paid parental leave
• Bereavement leave

About the company

Fullstory is a behavioral data platform that helps businesses understand and improve digital experiences. The company builds technology to uncover insights and optimize customer and employee journeys.