# Senior Staff Software Engineer, Serving

**Company:** [Liftoff](https://hotfix.jobs/companies/liftoff)
**Location:** Remote
**Role:** Backend Engineering
**Salary:** $219k – $266k/yr
**Experience:** 10+ years
**Skills:** Go, TensorRT, Gpu Inference, Machine Learning, Feature Stores, Data Structures, Algorithms, System Architecture, Performance Analysis, Benchmarking, Observability
**Posted:** 2026-09-09

> Designs and operates high-throughput, low-latency ad-serving infrastructure, including GPU-based model inference and feature stores. Requires 10+ years of industry experience, strong computer science fundamentals, and a master’s degree in computer science or equivalent experience.

## Job Description

## Responsibilities
- Design, build, and operate high-throughput, low-latency services that process bid requests, execute bidding logic, and respond to ad exchanges in real time.
- Improve the performance, scalability, and reliability of systems processing millions of requests per second under strict latency constraints.
- Develop and optimize GPU-powered inference services using TensorRT.
- Profile inference pipelines and eliminate bottlenecks in GPU utilization, batching, memory access, serialization, networking, and request handling.
- Partner with machine learning engineers to productionize model architectures and features.
- Design and operate large feature-store fleets providing low-latency access to real-time and precomputed features.
- Develop benchmarking and performance-analysis tools for comparing models, analyzing latency and throughput trade-offs, and identifying regressions.
- Improve experimentation tooling for offline training runs, candidate-model evaluation, and model leaderboards.
- Own changes through design, implementation, testing, deployment, observability, capacity planning, incident response, and optimization.

## Requirements
- Strong computer science fundamentals, including data structures, algorithms, and system architecture.
- 10+ years of industry experience.
- Master's degree or higher in Computer Science, or equivalent work experience.

## Nice to Have
- Experience with Go.

## Compensation
- Base salary ranges vary by location:
  - SF Bay Area, NYC, and Los Angeles/Orange County: $255,000–$310,000
  - Seattle/Olympia, Austin, San Diego, Santa Barbara, and Boston: $234,000–$285,000
  - All other cities and towns in approved states: $219,000–$266,000
- Compensation also includes equity and benefits, which may include medical coverage, wellness stipends, and other benefits based on country of residence.

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