Backend Developer (AI Data Collection and Infrastructure)

Location: On-site in central Aarhus, Denmark; hybrid options are planned for later this year.

Company

hirify.global builds SEO analytics, AI visibility tracking, and search data API products powered by large-scale data collection infrastructure.

What you will do

• Build and operate the collection and ingestion pipeline processing billions of rows, web requests, background jobs, and analytical queries.
• Add coverage for new search surfaces and maintain existing collectors as external platforms change.
• Write and optimize queries across columnar and relational data stores.
• Make scoped changes to existing services and gradually own services from design through deployment and production operation.
• Work on AI agents, tool design, and data collection challenges across hirify.global, AccuLLM, and AccuSERP.

Requirements

• Strong programming fundamentals and the ability to reason about runtime costs.
• Experience with code running in a real production system, hosted service, or user-facing side project.
• Comfort working in Linux, reading logs, tracing requests, and investigating performance issues.
• Ownership of problems from investigation through implementation and follow-up.
• Ability to work on-site in Aarhus.

Nice to have

• Distributed systems fundamentals, including queues, workers, and backpressure.
• Python and frameworks or tools such as Django, Celery, pandas, or polars.
• ClickHouse or another columnar database.
• Networking, web scraping, browser automation, AI agents, or Kafka experience.

Culture & Benefits

• End-to-end ownership of services rather than ticket-based work.
• Frequent releases, with changes sometimes moving from idea to production the same day.
• Collaborative design discussions focused on correctness, cost, latency, and maintainability.
• Flexible working hours, pension, health insurance, and paid parental leave.
• Choice of hardware, catered lunch, fruit, refreshments, and a central office.

Hiring process

• Apply with a CV and short note in Danish or English.
• Applications are reviewed as they arrive, with hiring taking place once a suitable candidate is found.
• A link to something built by the candidate is highly valued.