Extend - Senior Software Engineer II
Requirements
• 8+ years of full-stack experience • Proven track record building distributed, highly available systems on AWS, with hands-on serverless experience • Demonstrated experience shipping AI/LLM features to production • Strong instincts for API design, versioning, idempotency, and backwards compatibility — especially where events drive money movement or fulfillment • A track record of owning large, ambiguous, cross-system initiatives end to end • Proven ability to influence beyond your team — aligning groups, distilling complex ideas for leadership, and pushing back with data • A pattern of mentoring across levels and driving team-wide improvements that outlast any single project • Strong data modeling and context engineering skills that ensure application quality and sound agentic decisioning • Fluency with advanced AI developer tooling, a track record of using it to ship more, and a habit of bringing teammates along • Exceptional communication across product, business stakeholders, designers, support, and engineers • Expert in TypeScript, Node.js, and React • Estimated Pay Range: $171,000 - $198,000 per year salaried*
Responsibilities
• Tackle ambiguous, cross-system problems spanning all aspects of fulfillment and servicing — refunds, replacements, reverse logistics, and more • Own large features end to end, from design through deployment, release, and monitoring • Deliver scalable, event-driven, AI-native applications that elevate the customer experience • Collaborate with platform teams to enhance overall system architecture • Own the design, implementation, quality and safety of AI/agentic features in production systems • Mentor other engineers across levels through code review, pairing, design collaboration and coaching • Drive adoption of tooling and practices, including AI developer tooling, and codify the habits that make them effective • Advocate for the proactive investments — refactors, observability, upgrades, technology adoption - that enable continuous improvement • Communicate fluently across product, design, solutions, and ops to align outcomes with business goals
Benefits
• The target base salary range for this position is listed above. Individual salaries are determined based on a number of factors including, but not limited to, job-related knowledge, skills and experience. • Life at Extend: • Life at Extend: • Working with a great team from diverse backgrounds in a collaborative and supportive environment. • Competitive salary based on experience, with full medical and dental & vision benefits. • Stock in an early-stage startup growing quickly. • Generous, flexible paid time off policy. • 401(k) with Financial Guidance from Morgan Stanley. • Extend CCPA HR Notice
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