Staff Software Development Engineer

Responsibilities

• Define the multi-quarter technical roadmap for the Business team and align it with company priorities
• Design and operate high-throughput microservices where reliability, latency, and observability are non-negotiable
• Work collaboratively with cross-functional teams to design and implement new features across all five business verticals
• Communicate complex technical designs to both technical and non-technical stakeholders
• Collaborate with engineering teams across OfferUp to surface common pain points, develop solutions, and evangelize best practices
• Drive experimentation strategy, design A/B tests, interpret results, and use data to decide what ships
• Make pragmatic calls on what to refactor, replace, or leave alone, and bring the team along on the reasoning
• Support, mentor, and grow other engineers on the team
• Partner deeply with Product, Design, and Business stakeholders to drive features and assess timelines
• Participate in a reasonable on-call rotation with the rest of the team
• Help maintain code quality across our existing applications
• Create solutions and frameworks that make the rest of the team better and faster
• Champion the use of AI tooling across the team (coding assistants to agentic workflows for testing, code review, and operational tasks); help define guidelines and best practices that scale these tools across OfferUp engineering
• Become an SME for the team's areas of ownership

Requirements

• 8+ years of professional software engineering experience
• Experience building and operating data-driven applications at scale
• Experience performing data analysis and translating results into business recommendations
• Hands-on experience using AI coding tools (Claude Code, Cursor, Copilot, or similar) in a production engineering workflow
• Experience using good judgment to balance engineering improvements with business needs
• Experience developing both short- and long-term technical vision for a set of services or features
• Experience guiding and mentoring other engineers
• Strong Java skills (required) and fluency in any other modern language; deep grounding in OOP, microservices, and distributed-systems design
• Hands-on experience designing and building microservices and scalable distributed systems
• Strong knowledge of data structures and object-oriented design
• Hands-on experience with load balancing and handling large traffic volumes
• Experience with AWS or other cloud infrastructure
• A bias toward shipping, learning from production, and iterating quickly
• BS or MS in Computer Science, or equivalent practical experience

Nice-to-Haves

• Full-stack experience with React, TypeScript, and GraphQL
• Experience with payment integrations (Stripe or similar) and third-party platform integrations (Shopify, marketplaces)
• Experience with A/B testing platforms (Statsig, LaunchDarkly, Optimizely) and analytics warehouses (BigQuery, Snowflake)