Software Engineer, Full-Stack

Respan • AI Development Tools • AI Evaluation & Observability • Python • JavaScript • TypeScript • Node JS • 4 days ago

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Salary

≈ $105k – $203k per year (Estimated)

Location

Remote (United States, India)

Seniority

Middle · 3+ years exp

Employment

Full-Time

Confirmed on the employer's own hiring board on Oct 17, 2026. First seen by Alion on Aug 27, 2026.

Overview

Company

Impact

Profile match

Respan

Respan, which launched as Keywords AI, builds the observability and evaluation layer that engineers rely on to trace, debug and improve applications built on large language models. Its platform records every prompt, tool call and response, scores them against curated test sets and shows exactly where quality, latency or cost regressed between releases, so teams can ship model changes with the same discipline they apply to ordinary software. The product is used by startups running AI features in production at scale.

respan.ai • HQ: San Francisco, United States • AI Development Tools • AI Evaluation & Observability • 51-200 employees • Est. 2023

Tech stack of Respan

Backed by Y Combinator

What we’re building

Respan is building the self-driving observability and evals platform for AI teams, used by 60+ YC companies and hundreds of AI teams.

The role

You will work on everything from the backend tracing pipeline and eval framework to the React dashboard that thousands of AI teams use daily. We are a small team, so you will own features end-to-end. This role is for someone who is comfortable jumping between Python and TypeScript, cares about both system design and user experience, and wants to ship things that matter every week.

What you’ll do:

Build and ship product features across the full stack (React, Next.js, Python, PostgreSQL)
Design and implement APIs, data pipelines, and real-time systems
Collaborate directly with founders and customers to scope and prioritize work
Own features from design through deployment and iteration
Contribute to infrastructure decisions and system architecture

What you must have:

Strong experience with TypeScript, React, and Node.js or Python
Comfortable building and deploying production web applications
Ability to move fast and ship iteratively in an early-stage environment

Strong plus:

Experience with data-intensive applications or observability tools
Familiarity with PostgreSQL, ClickHouse, or similar databases
Background in developer tools or B2B SaaS
Good instincts for product and user experience

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