Senior Software Engineer, Growth

Jobtailor; San Francisco (CA); On-site; USD 170,000 - 210,000; Full time

Job summary

Quizlet is seeking a senior software engineer to deliver end-to-end projects that power learner experiences. You will design and implement experiments, analyze results, and collaborate with data scientists to advance product priorities.

You’ll build scalable systems, mentor teammates, and raise code quality and observability while partnering with product, design, and analytics to impact millions of learners.

Qualifications

• 5+ years of experience in software engineering.
• Deliver complex end-to-end projects from design to deployment.
• Hands-on with experimentation platforms such as GrowthBook, Optimizely, LaunchDarkly, or Statsig.
• Working knowledge of experiment design fundamentals, including sample size/power and guardrails.
• Solid foundation in backend, mobile development, or full-stack engineering.
• Experience building scalable systems and data-informed decisions.

Responsibilities

• Deliver end-to-end projects contributing to product and business priorities.
• Design, implement, and analyze A/B tests via GrowthBook across acquisition, activation, or retention surfaces.
• Own hypothesis framing through experiment result interpretation.
• Partner with Data Science to define success metrics and instrument events.
• Build and maintain scalable systems supporting learner lifecycle experiences.
• Own a funnel or lifecycle surface (signup, onboarding, upgrade) with instrumentation and health.
• Mentor junior engineers through code reviews and pairing sessions.

Skills

A/B Testing

Experiment design

Backend/Full-Stack

Data-driven decisions

Analytics pipelines

Collaboration

Mentoring

Problem solving

Communication

Tools

GrowthBook

Optimizely

LaunchDarkly

Statsig

BigQuery

Pub/Sub

Deployment pipelines

Observability tools

Job description

• Deliver end-to-end projects contributing to Quizlet’s product and business priorities, from planning and design through implementation, testing, and rollout
• Design, implement, and analyze A/B tests via GrowthBook across acquisition, activation, or retention surfaces
• Own hypothesis framing through experiment result interpretation
• Partner with Data Science/Analytics to define success metrics, instrument events, and guard against false positives/negatives
• Build and maintain high-quality, scalable systems supporting learner lifecycle experiences
• Own a funnel or lifecycle surface such as signup, onboarding, or upgrade, including instrumentation and health
• Improve code quality, system reliability, and developer efficiency using industry best practices and modern technologies
• Lead and contribute to technical discussions and align the team on implementation decisions
• Break down complex projects into actionable tasks and execute with minimal oversight
• Identify and resolve issues proactively
• Mentor junior engineers through code reviews, pairing sessions, and domain-knowledge sharing
• Improve engineering practices across build systems, deployment pipelines, and observability tools
• Collaborate with engineers, product managers, designers, and data scientists to deliver scalable solutions for millions of learners

Requirements

• 5+ years of experience in software engineering
• Proven ability to deliver complex projects end-to-end, from design and implementation through testing and deployment
• Hands-on experience with experimentation/feature-flagging platforms such as GrowthBook, Optimizely, LaunchDarkly, or Statsig
• Working knowledge of experiment design fundamentals, including sample size/power, guardrail metrics, novelty effects, and avoiding false-positive conclusions
• Solid foundation in backend, mobile development, or full-stack engineering
• Experience building scalable, high-quality systems and user experiences
• Comfort working with event-tracking or analytics data pipelines such as BigQuery and Pub/Sub
• Strong problem-solving skills and ability to make data-informed technical decisions
• Curiosity to explore and apply emerging technologies and frameworks
• Excellent collaboration and communication skills
• Experience mentoring or guiding peers
• Bonus: experience with growth loops, referral/virality mechanics, lifecycle messaging, conversion rate optimization, funnel analytics, SEO/ASO, high-data or performance environments, mobile-first or multi-platform development, SDUI, incident response, or operational engineering practices

Core Competencies

Demonstrates expertise in delivering end-to-end software engineering projects, with a strong focus on experimentation, data analysis, and building scalable systems. Proficient in mentoring junior engineers and improving engineering practices through collaboration and technical discussions.

Highest-signal resume keywords

• 5+ Years Of Experience In Software Engineering
• Hands-On Experience With Experimentation Platforms
• Solid Foundation In Backend Or Full-Stack Engineering
• Experience Building Scalable Systems
• Strong Problem-Solving Skills

Hard Skills

• A/B Testing
• Experiment Design Fundamentals
• Backend Development
• Mobile Development
• Full-Stack Engineering
• Data-Driven Decision Making
• Code Quality Improvement
• System Reliability
• Event-Tracking
• Analytics Data Pipelines

Soft Skills

• Excellent Collaboration
• Strong Communication
• Mentoring Skills
• Curiosity For Emerging Technologies
• Proactive Problem Solving

Industry Keywords

• Scalable Systems
• User Experiences
• Funnel Analytics
• Conversion Rate Optimization
• Lifecycle Messaging

Tools & Technologies

• GrowthBook
• Optimizely
• LaunchDarkly
• Statsig
• BigQuery
• Pub/Sub
• Deployment Pipelines
• Observability Tools