Integrations Engineer

About the product:

Our client is a US-based product company building a lifecycle marketing platform for ecommerce brands: behavioral event tracking, on-site personalization, and email/SMS automation. Integrations are the front door of the product, not a side feature.

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About the role:

You will own the layer connecting ecommerce platforms and third-party marketing tools to the product: building and maintaining connectors (Shopify, Adobe/Magento, Meta, Zapier), keeping data syncs (customers, orders, products, reviews, opt-ins) fast and reliable, and shipping the merchant-facing apps that install the tracking.

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Requirements:

• 4+ years of backend engineering with real production experience integrating third-party APIs;
• Strong English speaking skills;
• Strong Node.js/TypeScript plus working Go (or strong Go plus working Node);
• Hands-on experience with at least one major ecommerce platform API, ideally Shopify (Admin GraphQL API, webhooks, app OAuth, embedded apps);
• Event-driven systems: message queues (BullMQ, Pub/Sub, Kafka or similar), worker patterns, rate limiting, idempotent processing;
• Auth for integrations: OAuth 2.0, JWT, webhook HMAC verification;
• MongoDB or PostgreSQL, Redis, Docker, Kubernetes deployments;
• Clear written communication and the judgment to work autonomously in a small team.

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Responsibilities:

• Build and maintain platform connectors: OAuth install flows, webhook subscriptions, HMAC signature validation, rate-limited API clients, ETL-style backfills;
• Extend the connector registry with new third-party integrations (review platforms, subscription apps, ESPs, ad platforms) using schema-driven configuration;
• Keep high-volume webhook ingestion and queue-based sync workers healthy: idempotency, retries, backpressure; monitoring with Prometheus, Sentry, OpenTelemetry;
• Ship merchant-facing install and settings UIs in the connector dashboard;
• Debug production issues across platform APIs in a multi-tenant environment.

Nice to have:

• Marketing/ESP APIs (Klaviyo, Mailchimp), review platforms (Yotpo, Okendo), or subscription platforms (Recharge, Stay Ai, Ordergroove);
• PHP (WordPress/WooCommerce or Adobe/Magento 2 module development);
• gRPC and protobuf, schema-first API design;
• Cloudflare Workers, Remix or Next.js, Shopify Polaris;
• GCP (Pub/Sub, Cloud Run, GCS, Dataflow) and Helm;
• Zapier or similar iPaaS integration development
• Experience building with LLMs: prompting, agentic workflows, evaluating and iterating on model output.
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How the team works:

Small team, high ownership, minimal process. You will ship to production in your first weeks and own your services end to end, including observability and on-call for what you build, with your scope expanding as fast as you are ready for it.

LLM agents (Claude/Codex) are a first-class part of how the team works: agentic workflows encode the shape of a connector (auth, sync, webhooks, error handling) and specialize it per platform. Comfort collaborating with LLMs is part of the job.