Senior Software Engineer, Core Systems

Role Description

PubNub is looking for a Senior Software Engineer to join our Core team and help build and operate the foundational services behind our real-time platform. This is a senior individual contributor role focused on designing, building, and operating distributed systems in Rust. You'll work on services that support messaging, eventing, presence, storage, history, search, and fanout across our globally distributed platform.

You'll help evolve systems that process trillions of transactions each month, with a focus on reliability, performance, observability, and operational excellence. Engineers on the Core team own services from development through production operations, including monitoring, incident response, and capacity planning.

Key Responsibilities

• Build core distributed systems in Rust.
• Design scalable and fault-tolerant platform services.
• Develop messaging, storage, and eventing infrastructure.
• Improve system reliability and operational resilience.
• Own services from development through production operations.
• Create metrics, dashboards, alerts, and runbooks.
• Support incident response and capacity planning.
• Optimize latency, throughput, and system performance.
• Work across cloud infrastructure and data systems.
• Use AI tools thoughtfully to improve engineering workflows.

Qualifications

• Strong experience building production systems in Rust.
• Experience with distributed systems and cloud infrastructure.
• Deep understanding of fault tolerance and concurrency.
• Experience operating production services at scale.
• Experience with Kubernetes-based environments.

Requirements

• Experience with AWS infrastructure.
• Experience with Cassandra, DynamoDB, Redis, or Aurora.
• Exposure to Go or Python.
• Strong observability and debugging experience.
• Experience supporting high-scale distributed systems.

Benefits

• Build infrastructure processing trillions of transactions monthly.
• Work on distributed systems operating at global scale.
• Own services from design through production operations.
• Solve reliability, performance, and scalability challenges.
• Collaborate with experienced platform engineers.
• Contribute to systems used by millions worldwide.
• Remote-first environment with autonomy and ownership.
• Compensation up to $170,000 per annum plus equity eligibility, determined based on experience, skills, location, and business needs.