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

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Develop and maintain high-performance, scalable event ingestion and push delivery infrastructure.
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Build out the required tools and infrastructure to work directly with ad networks to integrate our real-world context data
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Design and implement robust APIs and services using Node.js and TypeScript to support mobile and web applications.
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Optimize and manage message queues (e.g., RabbitMQ or similar) to ensure efficient and reliable communication between services.
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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.
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Monitor system performance and troubleshoot issues to ensure high availability and reliability & work on migrating key workloads from cloud providers to self hosted infrastructure.

Qualifications

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Strong proficiency in Node.js, TypeScript and experience with message queue systems like RabbitMQ.
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Experience in designing and building scalable APIs and backend services.
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Familiarity with cloud platforms (e.g., AWS, GCP, Azure) and containerization (e.g., Docker, Kubernetes).
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Understanding of microservices architecture and distributed systems & Excellent problem-solving and debugging skills.
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Ability to work in a collaborative, agile environment & Passion for delivering high-quality, scalable infrastructure solutions.
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Familiarity with DevOps practices and tools (e.g., Git, CI/CD, Terraform).
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Understanding of database technologies (we use Postgres and Clickhouse, but any experience work).

Diversity and inclusion

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.

Location

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.

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!

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