Senior Backend Engineer: Real-Time Feature Delivery

LaunchDarkly; United States; On-site; USD 163,000 - 224,000; Full time

Benefits offered by this job

Restricted Stock Units

Health insurance

Vision insurance

Dental insurance

Mental health benefits

Job summary

LaunchDarkly is seeking a Senior Software Engineer on the Flag Delivery team to own critical-path streaming systems that deliver feature-flag configurations globally in near real time. The role emphasizes reliability, low latency, and high scale as you shape the next generation of flag-delivery architecture using Go, AWS, Terraform, and Datadog.

You will design, build, and operate distributed systems, improve streaming infrastructure, and collaborate across SDK, Core Product, and Data Platform

Qualifications

• 6+ years of backend engineering experience in distributed/high-throughput production systems.
• Proven track record owning reliable, low-latency services.
• On-call experience with strong observability mindset.
• Proficiency in at least one backend language (Go/Rust/Python) and cloud platform (AWS).
• Hands-on with infrastructure-as-code (Terraform) and observability tools (Datadog/Prometheus/New Relic).
• Strong understanding of concurrency, retries, idempotency, and failure handling.

Responsibilities

• Design, build, and operate distributed systems delivering feature-flag configuration to LaunchDarkly SDKs.
• Own and improve reliability, latency, and scalability of streaming and polling infrastructure.
• Debug and resolve complex production issues and participate in on-call rotations.
• Collaborate with SDK, Core Product, and Data Platform teams on flag delivery to customers.
• Write maintainable, well-tested code and participate in code/design reviews and production-readiness discussions.
• Drive architectural decisions balancing performance, cost, and operability.
• Improve observability, deployment safety, and operational processes for Flag Delivery.

Skills

Backend engineering

Distributed systems

On-call ownership

Reliability

Communication

Tools

Go

Rust

Python

AWS

Terraform

Datadog

Prometheus

New Relic

Job description

LaunchDarkly is seeking a Senior Software Engineer on the Flag Delivery team to own critical-path streaming systems that deliver feature-flag configurations globally in near real time. The role emphasizes reliability, low latency, and high scale as you shape the next generation of flag-delivery architecture using Go, AWS, Terraform, and Datadog.

You will design, build, and operate distributed systems, improve streaming infrastructure, and collaborate across SDK, Core Product, and Data Platform