About the company
Terra is the health operating system. We make it easy for developers and AIs to build on health data. Hundreds of wearables, sensors, labs, and health apps — connected, normalized, and made intelligent through a single platform. 1,000s of developers and AI labs build on Terra today. We process 15+ billion health data events per year. And we are just getting started.

The Role
Terra is the unified API for health and fitness data. We connect developers and AI labs to 500+ wearable, sensor, and biomarker sources through a single normalised schema. Over 15 billion health data events flow through our infrastructure every year. The companies building the world's best health products run on Terra.

We are hiring a Senior Customer Engineer — someone who can operate at the intersection of deep technical ability and customer-facing ownership. This is not a support role with scripts and macros. This is an engineering role where the customer is the context. You will be the most technical person our customers ever talk to, and the most customer-aware person on our engineering team.

You will own the full integration lifecycle: from first API call to production-grade data pipeline. You'll debug webhook delivery, troubleshoot OAuth flows across dozens of wearable providers, write reference implementations, and ship tooling that makes every developer on Terra's platform more successful. When something is broken at 2am and a customer's health app is down, you're the person who fixes it and then writes the runbook so it never happens again.

What You Will Do

• Lead technical onboarding for customers integrating with the Terra API — from initial sandbox setup through production go-live. You are accountable for time-to-first-data. Architect integration patterns tailored to each customer's stack: REST polling vs. webhook-driven pipelines, batch historical backfills vs. real-time streaming, mobile SDK vs. server-side.
• Debug and Resolve Complex Technical Issues. Troubleshoot data pipeline issues across Terra's infrastructure: webhook delivery failures, data gaps from upstream providers (Garmin, Fitbit, Oura, Apple Health, etc.), OAuth token expiry, and normalisation edge cases. Investigate issues that span multiple systems — from our API gateway and webhook retry logic, through our data normalisation layer, to the customer's receiving endpoint.
• Build Internal Tooling and Automation. Identify patterns in customer issues and build tooling to eliminate them. Contribute to Terra's developer documentation, API reference, integration guides, and troubleshooting runbooks. Write docs that actually save engineers time. Develop internal dashboards and diagnostic tools to accelerate issue resolution.
• Be the Voice of the Customer to Engineering. Translate customer feedback into concrete product requirements. Identify API gaps, missing data fields, broken normalisation mappings, and DX friction — and drive fixes by working directly with the product and infrastructure teams.

Non-Negotiables

• 5+ years as a software engineer, solutions engineer, or customer engineer at an API-first or developer tools company.
• Deep fluency in REST APIs, OAuth 2.0, webhooks, WebSocket protocols, and HTTP debugging.
• Strong programming ability in at least two of: Python, JavaScript/TypeScript, Go, Java.
• Experience debugging distributed systems.
• Clear, precise written and verbal communication.
• Default-to-yes attitude with extreme follow-through.

Strong Preference

• Experience working with health, fitness, or wearable data.
• Familiarity with data normalisation challenges.
• Prior experience in a high-velocity startup environment.
• Exposure to HIPAA, GDPR, CCPA, and SOC 2 compliance in the context of health data processing.
• Experience with real-time data streaming, event-driven architectures, or IoT data pipelines.
• Track record of building developer-facing documentation, SDKs, or sample applications that developers actually used.

How We Work
Terra runs at extremely high velocity. We think from first principles. We default to yes. Everything is buildable and everything is figureoutable. We value resourcefulness over credentials and intensity over hours.

Big Plus
You are an athlete. You train, you compete, you push limits — or at the very least, you are obsessed with quantifying your own data. The discipline, ambition, and courage it takes to show up every day and get better is the same energy we run on. If you understand the data because you live it, you'll build a better product.

By submitting this application, I agree that my personal data will be collected, processed, and retained by the company solely for the purposes of managing and assessing my candidacy.