Senior Backend Engineer - Työmarkkinatori

We are building infrastructure for the next generation of AI search, AI assistants, and agent-driven commerce. Our platform helps businesses connect their websites, catalogs, content, and commerce systems so they can be understood, discovered, and acted on by AI systems. We are looking for a Senior Backend Platform Integration Engineer to own and improve the integration layer behind this system. This is a hands-on engineering role for someone who enjoys APIs, webhooks, data synchronization, databases, infrastructure, and production reliability. You will work in a rapidly evolving startup environment where priorities can shift quickly, technical judgment matters, and ownership is expected. Your tasks include building and maintaining backend services that connect to external platforms via APIs, OAuth, webhooks, and scheduled sync; designing ingestion flows for website pages, product catalogs, documents, policies, and other business assets; normalizing external platform data into internal models used by AI search, assistant experiences, analytics, and commerce workflows; improving webhook handling, retries, idempotency, failure recovery, rate-limit behavior, and sync observability; owning database design for integration and ingestion systems, including schema design, migrations, indexing, and query performance; maintaining infrastructure-as-code, cloud environments, deployment workflows, secrets, and operational tooling; building internal tools to diagnose failed syncs, stale data, provider API errors, customer configuration issues, and production incidents; working closely with product and engineering to turn ambiguous integration problems into reliable platform capabilities; staying current with evolving platform APIs, AI agent protocols, ecommerce standards, and integration patterns. Required skills include strong backend experience with production APIs, services, and integration systems; strong Python skills, with flexibility to work with TypeScript, PHP, or other web stacks; PostgreSQL/database expertise including schema design, indexing, migrations, query performance, data integrity, and debugging; hands-on experience with third-party APIs, OAuth, API keys, webhooks, HMAC signatures, pagination, rate limits, retries, and error handling; understanding of data sync issues such as freshness, deletes, partial failures, idempotency, deduplication, and schema drift; infrastructure-as-code experience with Terraform, Pulumi, or similar; cloud deployment, CI/CD, logging, monitoring, secrets management, and production operations; ability to work independently, make technical decisions, investigate unfamiliar systems, and adapt quickly in a startup environment. Bonus points for experience with Wordpress, Shopify, Webflow, Drupal, HubSpot, Google APIs, ecommerce APIs, CMS APIs, or integration platforms; async backend systems, queues, workflow engines, scheduled jobs, Dagster, or Temporal; AI/search infrastructure, retrieval systems, structured content, or data enrichment pipelines; Docker, containerized deployments, cloud observability, and operational tooling; PHP, WordPress plugins, Drupal modules, CMS extensions, or customer-site integration; building internal tools for engineering, support, debugging, or customer operations. The role is initially remote, moving to Helsinki office, with a target of at least 50-50 presence. Salary is competitive, with part in share options. Send your application for an offer.