Senior Backend Engineer - Focus Insights API (f/m/d)

About the Opportunity

Become part of the Ninetailed Team, pioneer of composable personalization and experimentation within the Contentful family.

At Ninetailed by Contentful, you will revolutionize personalization & experimentation for leading businesses worldwide. As a Senior Backend Engineer, you’ll play a key role in shaping and scaling our Insights API, ingesting billions of analytics events. Your work will enable our customers to generate impactful, data-driven insights through an API driven query engine.

What to expect? 

• Own and scale our Insights API, focusing on high-performance event ingestion and querying systems.
• Collaborate closely with data engineers and other teams building our SDKs & APIs, ensuring smooth data integration and optimized workflows.
• Design and build APIs that can handle high volumes of traffic, while providing an outstanding developer experience.
• Contribute to system architecture by bringing your ideas and experience to the table to optimize API design.
• Maintain stability and optimize for operational and cost efficiency.
• Drive observability, ensuring the services you build are well-instrumented, tested, and monitored.
• Ensure compliance with GDPR and other privacy regulations.

What you need to be successful

• Proven experience building high-traffic APIs and data products for processing large volumes of events.
• Strong proficiency with server-side TypeScript and API protocol design.
• Familiarity with API Contracts (e.g., ts-rest, tRPC) & Data Contracts (e.g., ProtoBuf, Avro).
• Experience working with Cloudflare Workers is a plus.
• Proficiency in using CI/CD pipelines (e.g., GitHub Actions, GitLab CI) and maintaining automated tests with tools like Jest or Mocha.
• Familiarity with Google Cloud Platform (Pub/Sub, BigQuery, CloudRun, GCS) is beneficial.
• Experience with Infrastructure as Code, ideally Terraform.
• Proactive approach with a high sense of ownership.
• Strong collaborative mindset with experience working cross-functionally.
• Ability to think strategically and anticipate future challenges or opportunities.
• Great communication skills in English, especially when explaining complex technical concepts.

What’s in it for you?

• Join an ambitious tech company reshaping the way people build digital experiences
• Full-time employees receive Stock Options for the opportunity to share in the success of our company
• Fertility and family building benefits, including a lifetime reimbursable wallet to support your growing family.
• We value Work-Life balance and You Time! A generous amount of paid time off, including vacation days, sick days,  education days, compassion days for loss, and volunteer days
• Time off to care for and focus on your growing family 
• Use your personal annual education budget to improve your skills and grow in your career
• Enjoy a full range of virtual and in-person events, including workshops, guest speakers, and fun team activities, supporting learning and networking exchange beyond the usual work duties 
• An annual wellbeing stipend to care for your physical, financial, or emotional health
• A monthly communication phone/internet stipend and phone hardware upgrade reimbursement.
• New hire office equipment stipend for hybrid or distributed employees. Get the gear you need to work at your best.

#LI-Hybrid