Senior Backend Engineer - Focus Ninetailed Experience 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 solve complex technical puzzles and challenges to continuously optimize our low latency Experience API, processing billions of requests in real time. Your work will enable our customers to serve personalized digital user experiences in the most performant way possible.

What to expect? 

• Design, develop, and maintain high-performance backend services with a focus on reliability and scalability based on very modern technologies like Cloudflare Workers
• Constantly search for opportunities to improve the system performance and iterate on its architecture
• Solve technical challenges in creative ways, balancing the tradeoff between performance and elegant software architecture
• Continuously monitor and optimize system performance through benchmarking, while making sure the system is well instrumented for observability
• Stay up to date with the latest technologies and constantly evaluate their potential usage at Ninetailed
• Implement defensive coding practices, ensuring systems are resilient and fault-tolerant
• Guarantee correctness and maintainable code through automated testing

What you need to be successful

• Proven experience in building APIs and services that efficiently handle large volumes of traffic.
• Strong proficiency with server-side TypeScript and API protocol design.
• Experience with serverless architectures, ideally edge compute environments such as Cloudflare Workers.
• Familiarity with lower-level languages such as Rust is a plus.
• Familiarity with runtime environments like V8 and experience in optimizing infrastructure and algorithms for performance.
• Hands-on experience with benchmarking, instrumenting code for observability, and performance optimization for large-scale systems.
• Expertise in defensive coding practices, ensuring system robustness and fault tolerance.
• Proficiency in using CI/CD pipelines (e.g., GitHub Actions, GitLab CI) and maintaining automated tests with tools like Jest or Mocha.
• Proactive approach with a high sense of ownership.
• 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,compassion days for loss, education days, and volunteer days
• 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 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 #LI-KH1

Who are we?

Contentful is the intelligent composable content platform that unlocks all of an organization’s digital content to deliver impactful customer experiences, making content a strategic business asset. The Contentful Platform, Contentful Studio, and the Contentful Ecosystem combine the flexibility of composable content with the intelligence of AI, empowering digital teams to drive business momentum through collaboration, speed, and scale. Contentful powers innovative content experiences across brands, regions, and channels for organizations around the world, including nearly 30% of the Fortune 500. Nearly 800 people from more than 70 nations contribute their energy and creativity to Contentful, working from hubs in Berlin, Denver and distributed around the world.

Everyone is welcome here!

“Everyone is welcome here” is a celebrated component of our culture. At Contentful, we strive to create an inclusive environment that empowers our employees. We believe that our products and services benefit from our diverse backgrounds and experiences and are proud to be an equal opportunity employer. All qualified applications will receive consideration for employment without regard to race, color, national origin, religion, sexual orientation, gender, gender identity, age, physical [dis]ability, or length of time spent unemployed. We invite you to apply and join us!

If you need reasonable accommodations at any point during the application or interview process, please let your recruiting coordinator know.

Please be aware of scammers who may fraudulently allege to be from Contentful. These types of fraud can be carried out through copycat websites, fake email addresses claiming to be from our company, or social media. We do not ask for your personal information such as bank account numbers, identification numbers, etc through social media or chat-based apps, nor do we request or send money for the purchase of business equipment. If you suspect fraud, please report it to your local authorities, as well as reaching out to us at [email protected] with any information you may have.

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