---
title: 'Software Engineer, Test Infrastructure (AI DevEx) at Sift Stack, Inc.'
canonical: 'https://feeny.ai/job/software-engineer-test-infrastructure-ai-devex-sift-stack-inc-marina-del-rey-t2x3xngy4yxt'
type: 'job'
last_seen: '2026-11-02'
---

# Software Engineer, Test Infrastructure (AI DevEx) at Sift Stack, Inc.

- **Company:** Sift Stack, Inc.
- **Location:** Marina Del Rey, CA
- **Compensation:** $180k–$230k
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-10-29
- **Last confirmed live:** 2026-11-02
- **Apply:** https://jobs.ashbyhq.com/siftstack/28db223c-b2ce-4b40-b515-32d96062e6fa

## Job description

## About Sift

Sift is the data infrastructure platform for hardware engineering teams. We turn high-frequency telemetry into engineering insights for mission-critical machines: rockets, satellites, autonomous vehicles, energy systems, and defense platforms. Founded by former SpaceX engineers, we are building the review and analysis layer for the AI era of physical systems.

## About The Role

Sift is hiring a Senior Software Engineer to build and own the developer infrastructure and testing environments that enable our engineers to ship software faster and with greater confidence. You'll design systems that allow engineers to spin up complete, production-like environments on demand to test changes, simulate real-world workloads, and validate correctness. As AI coding agents become increasingly integrated into development workflows, you'll build the infrastructure that enables these agents to independently test, debug, and validate the code they produce. Sift processes high-volume telemetry from complex hardware systems, making realistic testing environments particularly challenging. This is a foundational, high-ownership opportunity to architect and scale the infrastructure that powers how we develop, test, and ship software.

In This Role, You'll:

- Design and build infrastructure that provisions isolated, production-like testing environments on demand, enabling engineers to validate changes against Sift's full application stack.
- Build and optimize CI/CD pipelines, build systems, and deployment automation to make testing environments fast, reliable, and cost-efficient.
- Develop infrastructure that supports diverse testing workloads, including integration testing, correctness validation, load testing, and performance testing.
- Build tooling for realistic data generation and user behavior simulation to validate software under production-like conditions.
- Enable AI coding agents to interact with testing environments, execute tests, and validate code changes autonomously.
- Partner closely with engineering teams to understand developer needs, eliminate bottlenecks, and improve development velocity and software quality.

The Skillset You'll Bring:

- 6+ years of professional software engineering experience, with significant experience in developer infrastructure, test infrastructure, platform engineering, or developer tooling.
- Deep hands-on experience with Docker, Kubernetes, build systems, and deploying applications to cloud platforms such as AWS, GCP, or Azure.
- Experience building and automating developer infrastructure, deployment systems, or testing environments, with an understanding of scalability, performance, and reliability.
- Experience developing or optimizing CI/CD pipelines and automating infrastructure provisioning and deployments.
- Strong software engineering and programming skills, preferably in Go or Python.
- Ability to balance infrastructure performance, environment fidelity, reliability, and cost.
- Strong collaboration skills and a developer-focused mindset, with experience building tools that improve engineering productivity.

Bonus Points:

- Experience building ephemeral or on-demand development and testing environments.
- Load testing, performance testing, or distributed test execution.
- Browser automation and end-to-end testing tools such as Playwright or Cypress.
- Building sandboxed execution environments or infrastructure supporting AI coding agents.
- Working on developer infrastructure at a fast-scaling technology company, cloud platform, or compute provider.

Engineering at SIFT: You'll have the opportunity to help evolve and scale our platform because we're still in the early stages of building the product. Relevant technologies include:

- Web frontend & backend: ECharts, Go, gRPC, PostgreSQL, Protobuf, Radix, React, Redux, and TypeScript
- Data: Arrow, DataFusion, Flink, Parquet, and Rust
- Infrastructure: Argo CD, AWS, Docker, GitHub Actions, Grafana, Kubernetes, Kustomize, Linux, Prometheus, and Terragrunt

Location: Sift’s headquarters is in Marina Del Rey, CA (Next to LAX). We collaborate in person twice a week—on Mondays and Thursdays—and come together for a full week every two months. We are open to relocating candidates to LA or working from our San Francisco office for the right candidate. Salary range: $180,000 - $230,000 per year. Plus equity and benefits.

Eligibility: U.S. Person Required: Must be a U.S. citizen, lawful permanent resident, or protected individual such as an asylee or refugee in compliance with ITAR (International Traffic in Arms Regulations) / EAR (Export Administration Regulations) regulations.

## About Sift Stack, Inc.

## Company Overview
- **One-liner**: Sift provides a unified observability platform for mission-critical hardware systems, enabling real-time telemetry ingestion, storage, analysis, and anomaly detection for aerospace, defense, energy, robotics, and manufacturing.
- **Entity Type**: Private (Series B, $42M raised in July 2025)
- **Headquarters**: El Segundo, California, USA (with expansion to Marina del Rey)
- **Founded**: 2022
- **Founders**: Austin Spiegel (CEO) and Karthik Gollapudi (Co-Founder), both former SpaceX engineers

## Core Business
- **Primary Industries**: Observability / Data Infrastructure for physical systems; Aerospace & Defense, Energy, Robotics & Physical AI, Advanced Manufacturing, Autonomous Vehicles
- **Target Customers**: B2B / Enterprise – engineering teams building, operating, and maintaining mission-critical machines (e.g., spacecraft, launch vehicles, satellites, autonomous rail, supersonic aircraft, grid-scale energy systems)
- **Mission**: “Advance science and technology by providing engineers advanced tools and infrastructure that help build our exciting future.” – [siftstack.com/about](https://www.siftstack.com/about)

## Products & Services
- **Sift Platform**: A unified observability platform that ingests, stores, and analyzes machine telemetry at scale. Supports real-time streaming analysis, automated data review, anomaly detection, and long-term retention. Integrates with Grafana, LabVIEW, Palantir Foundry, Nominal, Mavlink, and provides REST/GraphQL/Python/gRPC APIs. Deployment options include cloud SaaS, hybrid, on-premises, and air-gapped environments. – [siftstack.com/about/faq](https://www.siftstack.com/about/faq)

## Market Standing
- **Valuation**: Not publicly disclosed.
- **Key Metric**: Total funding raised: **$42M** (Series B, led by StepStone, July 2025). Prior rounds: Series A1 (Apr 2024), Series A ($4M, Nov 2023), Seed ($3.5M). – [pitchbook.com](https://pitchbook.com/profiles/company/525527-47)
- **Notable Investors**: StepStone (Series B lead), GV (Google Ventures – largest investor), plus 10 total investors. – [siftstack.com/about/faq](https://www.siftstack.com/about/faq)
- **Growth Signals**:
  - Headcount: 80 employees (as of 2026) – [pitchbook.com](https://pitchbook.com/profiles/company/525527-47)
  - Achieved **FedRAMP High** certification in partnership with Knox Systems, enabling federal/defense work. – [siftstack.com](https://www.siftstack.com/)
  - Named to Fast Company’s **Next Big Things in Tech 2024** (Transportation category). – [siftstack.com/about/faq](https://www.siftstack.com/about/faq)
  - Expanding to two cities (El Segundo/Marina del Rey) with new senior leaders in engineering, sales, and design. – [siftstack.com](https://www.siftstack.com/)
  - Customer results: Astrolab saved 5,000 development hours and $100K+ in costs; Parallel Systems reduced infrastructure costs by 85% and recovered 150 hours per engineer per year. – [siftstack.com/about/faq](https://www.siftstack.com/about/faq)

## Competitive Advantages
- **Purpose-built for hardware telemetry**: Unlike general-purpose databases or monitoring tools (e.g., Grafana, InfluxDB), Sift handles high-frequency, multi-channel sensor data at scale and provides automated anomaly detection (stateful rules, not just threshold alerts).
- **Compliance moat**: SOC 2 Type II, FedRAMP High, ITAR, CMMC2, NIST SP 800-171 – critical for aerospace and defense procurement.
- **Founder pedigree**: Built by former SpaceX engineers who personally experienced the pain of brittle in-house telemetry solutions.
- **Customer traction**: Deployed in spacecraft, launch vehicles, satellites, autonomous rail, supersonic aircraft, and grid-scale energy systems. Customers include Impulse Space, Reliable Robotics, Mach Industries, Astro Mechanica, JetZero, K2 Space, and others. – [siftstack.com/about/faq](https://www.siftstack.com/about/faq)

## Strategic Focus
- **Expand into national security and defense** via FedRAMP High certification and ITAR compliance.
- **Scale the platform** to serve more industries (physical AI, autonomous systems, energy) while maintaining air-gapped and on-premises options for classified programs.
- **Grow team** across engineering, product, and go-to-market in two office locations, while preserving a long-term, mission-driven culture. – [siftstack.com/career](https://www.siftstack.com/career)

## Why Work Here
- **Culture & Values**: Bias for action, customer experience first, own the outcome, thrive together, maintain a long-term mindset. Emphasis on solving real-world problems (not just shipping features) and working across disciplines. – [siftstack.com/career](https://www.siftstack.com/career)
- **Work Policy**: Hybrid – up to 4 days per week in-person depending on team. Free lunch on in-office days via Forkable.
- **Benefits**:
  - Medical (Blue Shield of CA, 100% employee premium covered on select plans)
  - Dental and vision (Principal, full coverage for employee & dependents)
  - 401(k) with Accrue/Vestwell
  - Unlimited PTO (subject to approval)
  - Equity grants (ownership aligned with company success)
- **Engineering Culture**: Interview process is transparent; teams are given autonomy to solve hard technical problems. The company is building “the backbone of tomorrow’s energy systems, aerospace platforms, and autonomous fleets.” – [siftstack.com/career](https://www.siftstack.com/career)

## Sources
1. [siftstack.com](https://www.siftstack.com/)
2. [siftstack.com/about](https://www.siftstack.com/about)
3. [siftstack.com/about/faq](https://www.siftstack.com/about/faq)
4. [siftstack.com/career](https://www.siftstack.com/career)
5. [pitchbook.com](https://pitchbook.com/profiles/company/525527-47)

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