Senior Platform Engineer, Foundations & Reliability

Sierra Ventures; San Francisco (CA); On-site; USD 180,000 - 240,000; Full time

Benefits offered by this job

Top-tier compensation

Stock options

Healthcare (medical, dental, vision)

Meals provided

22 weeks parental leave

Unlimited vacation

Visa sponsorship

Team off-sites

Job summary

Reflection is building a foundational platform powering research, training and production environments. You will design and deliver core services, APIs and infrastructure that enable high-throughput experimentation with strong reliability and observability.

Join a fast-paced startup with a bias toward action, shipping production-grade systems, and collaborating across research and infra teams to accelerate AI innovation while safeguarding performance at scale.

Qualifications

• Strong software engineering background with production-grade systems.
• Experience designing APIs, services, or developer platforms handling large-scale data or compute.
• Comfortable navigating complex codebases, debugging hard problems, and optimizing for reliability and speed.

Responsibilities

• Build and operate core services powering research, training, and production environments.
• Develop APIs, SDKs, and internal platforms enabling high-velocity experimentation.
• Uphold reliability targets with SLIs/SLOs and robust on-call practices.

Skills

Software engineering

API design

Distributed systems

Debugging

Reliability engineering

Communication

Tools

Go

Rust

C++

gRPC

Protobuf

Job description

Reflection is building a foundational platform powering research, training and production environments. You will design and deliver core services, APIs and infrastructure that enable high-throughput experimentation with strong reliability and observability.

Join a fast-paced startup with a bias toward action, shipping production-grade systems, and collaborating across research and infra teams to accelerate AI innovation while safeguarding performance at scale.