Full Stack Engineer, Expansion

The shape of it

In the posting’s own words

While the team's mission anchors to web surfaces, this role lives deeper in the stack. You'll be the engine behind the experiences rather than the pixel-level presentation—APIs, data pipelines, model orchestration, and service reliability that make LLM-driven user experiences possible at scale.

What it asks for · 6

• 5+ years of backend development experience, with emphasis on building APIs and services that power user-facing experiences
• Experience writing clear, elegant code in a team environment
• Familiarity with LLM APIs and concepts—prompt engineering, token management, embedding models, retrieval-augmented generation, or function calling. You don't need to be a researcher, but you understand how these models work well enough to build production systems around them.
• Experience building and operating distributed backend systems—you're comfortable with service-oriented architectures, async processing, caching layers, and monitoring and alerting in production
• Passion for engineering solutions focused around growth hacking and enablement
• Excellent verbal and written communication

Also a plus

• Proven ability to stitch different services and processes together even if you haven't worked with them before
• Experience in developing interactive tools and integrating them with existing systems
• Experience building highly complex interactive tools, including state management and data fetching
• Experience with data pipeline orchestration (Airflow, Dagster, Temporal, or similar) and structured output parsing from LLMs
• Experience with prompt versioning, A/B testing model outputs, or building model gateway and routing layers that allow teams to swap or compare providers (e.g., OpenAI, Anthropic, open-source models) • Proficiency with React, with a focus on interactions, animation, performance, and polish • Experience with A/B testing, synthetic monitoring, or accessibility testing

What the job covers

• Develop and implement the tooling and platforms to support interactive content tools (e.g., calculators, generators, templates) that provide utility to current and prospective businesses
• Utilize a user-first mindset to implement feedback mechanisms for continuous improvement of content and product offerings
• Design and build integrations to third-party software and create seamless workflows across these tools to unleash their full potential to the rest of Stripe
• Ensure reliability, security, and responsible AI practices across all LLM-driven features, including implementing content filtering, PII handling, rate limiting, graceful degradation, and output guardrails
• Work with a small team of technically sophisticated engineers who put users first

Tools and skills named

Words the posting leans on

• experience13×
• model8×
• users7×
• tools6×
• build5×
• building5×
• design5×
• apis4×
• data4×
• llm4×
• output4×
• pipelines4×
• platform4×
• power4×
• requirements4×
• services4×

Counted from the posting after the mission statement and the legal notices are set aside. The ones near the top are the ones a screener is looking for.

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