• Designing, developing, and maintaining the server-side logic of web applications. Implementing scalable and efficient server-side components and APIs. • Working with relational and/or NoSQL databases to store and retrieve data efficiently. Designing and optimizing database schemas for performance and scalability. • Integrating third-party APIs and web services to enhance application functionality. Developing custom APIs to facilitate communication between front-end and back-end systems. • Implementing security best practices to protect against common web application vulnerabilities. Conducting regular security audits and implement necessary measures. • Optimizing server-side code for maximum speed and scalability. Monitoring and troubleshooting performance issues. • Collaborating with front-end developers, UI/UX designers, and other team members to ensure seamless integration of components. • Using version control systems (e.g., Git) to manage and track changes to the codebase. • Conducting thorough testing of server-side components to identify and fix bugs. • Collaborating with QA engineers for comprehensive testing. • Clear and comprehensive documentation for back-end systems and APIs.

This description is a summary of our understanding of the job description. Click on 'Apply' button to find out more. Role Description We’re looking for a Senior Backend Software Engineer to help design, maintain, and evolve the core systems used across Hex. This role is centered on backend architecture and shared infrastructure, with responsibility for: - APIs - Realtime communication - Data access frameworks - Job orchestration - Internal admin tooling You’ll work closely with product engineering teams to understand their needs, then turn common patterns into robust, reusable systems. You’ll help define standards, influence architecture, and raise the quality bar across the backend. Frontend experience is helpful for understanding end-to-end workflows, but this role is primarily backend-focused. Core Contributions - APIs - GraphQL (schema design, performance, developer ergonomics) - Authentication & authorization (security, scalability, correctness) - Multiplayer & collaboration APIs (realtime state, concurrency) - Transport - WebSockets and realtime communication infrastructure - Storage Frameworks - Postgres (schema design, query optimization, migrations) - S3, DynamoDB, Redis - Job & Workflow Systems - BullMQ and background job processing - Temporal or similar workflow orchestration systems - Internal Tooling - Internal admin tools for debugging, operations, and customer support What You'll Do - Design and build backend frameworks and services used across the company - Own and evolve critical shared systems, including APIs, realtime transport, and job orchestration - Improve reliability, performance, observability, and security of foundational backend infrastructure - Partner with product teams to turn recurring needs into shared abstractions - Lead technical design discussions and help set architectural direction - Drive refactors, migrations, and system upgrades that reduce long-term complexity - Improve internal tooling to support debugging, operations, and customer-facing workflows - Mentor other engineers and contribute to strong engineering standards and practices Qualifications - 5+ years of professional software engineering experience with a strong backend focus - Experience working with Typescript/Node.js and SQL - Experience building and maintaining shared backend systems or frameworks used by multiple teams - Strong understanding of API design, distributed systems, and asynchronous workflows - Experience working with relational databases and data modeling at scale - Familiarity with background job systems, queues, or workflow orchestration tools - Comfort operating and evolving production systems over time - Experience with cloud infrastructure (AWS preferred) - Strong communication skills and a collaborative, leverage-oriented mindset Bonus Points - Experience with Python - Hands-on experience with GraphQL, WebSockets, BullMQ, or Temporal - Familiarity with observability tooling (metrics, tracing, logging) - Background in data platforms, developer tools, or collaborative systems - Experience with frontend technologies (e.g. React, TypeScript) for end-to-end context - Open-source contributions, especially in backend or infrastructure projects Our Stack Our product is a web-based notebook and app authoring platform. Our frontend is built with Typescript and React, using a combination of Apollo GraphQL and Redux for managing application state and data. On the backend, we also use Typescript to power an Express/Apollo GraphQL server that interacts with Postgres, Redis, and Kubernetes to manage our database and Python kernels. Our backend is tightly integrated with our infrastructure and CI/CD, where we use a combination of Terraform, Helm, and AWS to deploy and maintain our stack. Salary Range The salary range for this role is: $215,000 - $270,000. The salary range shown may be a reflection of additional factors such as geographical location and skill ranges/levels we’re open to. Placement in the salary range will be decided upon completion of the interview process, taking into account factors like leaving room for growth, internal fairness & parity, your demonstrated skills, and the depth of your experience. Privacy Policy By submitting an application the candidate consents to the use of their personal information in accordance with the Hex Privacy policy: Hex Privacy Policy .

• Build & Run Our Products • Collaborate across teams to align business, technical, and testing goals • Estimate and plan tasks collaboratively to ensure delivery confidence • Review specs, design solutions, and deliver high-impact features • Monitor, deploy, and troubleshoot features in staging and production • Own incidents during on-call rotations, ensuring rapid resolution • Ensure High Quality & Continuously Improve • Uphold and enforce coding and testing standards • Break down complex work into manageable tasks for better delivery • Conduct code reviews, ensure test coverage, and maintain strong documentation • Stay up to date on tools, libraries, and secure coding practices (OWASP) • Provide Technical Excellence & Leadership • Break down epics, design scalable APIs and systems • Mentor peers on TDD, BDD, DDD, and best practices • Identify risks, drive automation, and recommend process improvements • Champion clean, modular, and maintainable architecture

• Build & Run Our Products • Collaborate across teams to align business, technical, and testing goals • Estimate and plan tasks collaboratively to ensure delivery confidence • Review specs, design solutions, and deliver high-impact features • Monitor, deploy, and troubleshoot features in staging and production • Own incidents during on-call rotations, ensuring rapid resolution • Ensure High Quality & Continuously Improve • Uphold and enforce coding and testing standards • Break down complex work into manageable tasks for better delivery • Conduct code reviews, ensure test coverage, and maintain strong documentation • Stay up to date on tools, libraries, and secure coding practices (OWASP) • Provide Technical Excellence & Leadership • Break down epics, design scalable APIs and systems • Mentor peers on TDD, BDD, DDD, and best practices • Identify risks, drive automation, and recommend process improvements • Champion clean, modular, and maintainable architecture