Backend & Infrastructure Engineer
About Us
ContextSDK is building the on-device data infrastructure layer for the mobile ecosystem. By transforming raw smartphone sensor data into privacy-aligned, real-time contextual intelligence, ContextSDK unlocks a completely new class of signals that have historically been inaccessible to the industry. These signals capture how a real human interacts with their device in the physical world, enabling situational awareness without relying on identity, tracking or cloud processing.
Position overview
We are looking for a strong backend and infrastructure developer who has a deep understanding of Node.js, TypeScript, RabbitMQ (or similar queues) and efficient server scaling, to help us scale our infrastructure for the next billion events. Help develop existing products like ContextPush and ContextDecision, and lay the groundwork for new initiatives like expanding into the ad tech space.
Key responsibilities
Develop and maintain high-performance, scalable event ingestion and push delivery infrastructure.
Build out the required tools and infrastructure to work directly with ad networks to integrate our real-world context data
Design and implement robust APIs and services using Node.js and TypeScript to support mobile and web applications.
Optimize and manage message queues (e.g., RabbitMQ or similar) to ensure efficient and reliable communication between services.
Implement security best practices to protect data and maintain user privacy & Ensure code quality, maintainability and adherence to best practices through code reviews and testing.
Monitor system performance and troubleshoot issues to ensure high availability and reliability & work on migrating key workloads from cloud providers to self hosted infrastructure.
Work closely with the product team to align infrastructure development with business goals.
Automate deployment and scaling processes using modern DevOps tools and practices.
Qualifications
Strong proficiency in Node.js, TypeScript and experience with message queue systems like RabbitMQ.
Experience in designing and building scalable APIs and backend services.
Familiarity with cloud platforms (e.g., AWS, GCP, Azure) and containerization (e.g., Docker, Kubernetes).
Understanding of microservices architecture and distributed systems & Excellent problem-solving and debugging skills.
Ability to work in a collaborative, agile environment & Passion for delivering high-quality, scalable infrastructure solutions.
Familiarity with DevOps practices and tools (e.g., Git, CI/CD, Terraform).
Understanding of database technologies (we use Postgres and Clickhouse, but any experience work).
Experience with Infrastructure as Code tools, such as Pulumi, is a great plus.
What we offer
A flexible working environment.
An opportunity to be at the forefront of mobile app technology.
A passionate team that supports growth and learning.
Competitive salary and benefits.
Diversity and inclusion
ContextSDK is an equal opportunity employer and encourages individuals from all backgrounds and experiences to apply. We celebrate diversity and are committed to creating an inclusive environment for all team members.
Location
Vienna, Austria strongly preferred (or remote with regular on-site presence)
How to apply
Please submit your resume along with a cover letter explaining why you are the perfect fit for this role and how you plan to contribute to the future of mobile app development with ContextSDK. Include examples of relevant work that showcases your ability.
Applications are accepted on a rolling basis until the position is filled. We look forward to hearing from you via jobs@contextsdk.com!
Diversity and Inclusion
ContextSDK is an equal opportunity employer and encourages individuals from all backgrounds and experiences to apply. We celebrate diversity and are committed to creating an inclusive environment for all team members.
Do you think you have what we need but we don’t know yet?
Don't hesitate to send a cold job application; your initiative and passion might be exactly what the company needs, and you never know what opportunities may open up until you try!