---
title: 'Senior Software Engineer, Full Stack (Agentic AI) at Sift Stack, Inc.'
canonical: 'https://feeny.ai/job/senior-software-engineer-full-stack-agentic-ai-sift-stack-inc-marina-del-rey-sdkhnwfnpwet'
type: 'job'
last_seen: '2026-09-07'
---

# Senior Software Engineer, Full Stack (Agentic AI) at Sift Stack, Inc.

- **Company:** Sift Stack, Inc.
- **Location:** Marina Del Rey, CA
- **Compensation:** $180k–$230k
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-08-11
- **Last confirmed live:** 2026-09-07
- **Apply:** https://jobs.ashbyhq.com/siftstack/e8771ea1-231b-4caf-893f-66cdbf0b6ab1

## Job description

## ABOUT SIFT

Sift is the data infrastructure platform for hardware engineering teams. Sift turns high-frequency telemetry into engineering insights for mission-critical systems. Teams use Sift to build and operate rockets, satellites, autonomous vehicles, energy systems, defense platforms, and more. Founded by former SpaceX engineers who built the tools behind Dragon and Starlink, Sift is building the data infrastructure to herald the AI era for physical systems.

## About the Role

Hardware programs generate far more telemetry than any team can review by hand. Sift Agents is our answer: AI agents that work alongside hardware engineers, investigating anomalies, reviewing test and flight data, and answering in minutes questions that used to take a day of scripting.

This role comes with real product ownership and autonomy. You will talk directly to customers to understand how they review their machines, decide what to build, and own it from first MVP through every iteration after it ships. The surface area is wide: one day you might be polishing the frontend micro-interactions that make the chat experience feel great, the next you might be writing the Kubernetes scaling logic that orchestrates agent workloads. We’re heavy users of frontier agentic products ourselves and have strong opinions about what makes them great. Sift Agents is where we put those opinions to work.

This is a product engineering role, not a research role. Most of the work is the hard part of making agents dependable: tool design, context management, code execution environments, evaluation, and observability.

In This Role, You'll:

- Talk directly to customers and partner with product to turn real review workflows into agent capabilities: generating dashboards, writing analysis scripts, and surfacing insights buried in their telemetry
- Design, ship, and operate agentic systems that reason over large-scale time-series data and hardware domain context
- Build everything around the model that makes agents dependable: tool interfaces, sandboxed execution for agent-generated code, context and memory management, custom compaction algorithms, opinionated skills, and guardrails
- Develop and maintain Sift’s MCP server, the tool surface that lets both our agents and our customers’ AI tools query telemetry directly
- Work across the whole stack
- Build the frontend surfaces where Sift Agents live, and make them feel great
- Design and implement the APIs that power our agentic capabilities
- Run agents reliably at scale, both in the cloud and on-prem
- Build evaluation suites that measure whether agents actually help engineers, and instrument quality, latency, cost, and failure modes in production
- Integrate and assess frontier models across providers

The Skillset You'll Bring:

- Have 8+ years of professional software engineering experience
- Get excited about owning a product area: talking to customers, deciding what to build, and shipping it
- Have built frontend web applications with technologies like React, NextJS, or similar
- Have built APIs (REST, gRPC, etc.) or backend services with technologies like Go, Python, Rust, or similar
- Are curious about new AI products: you try new agents, models, and features as they ship, and have opinions about what makes them good

If this role excites you, apply even if you don’t check every box.

Bonus Points:

- Shipped products to users at scale: large data volumes, significant active user counts, or deep technical complexity
- Shipped LLM-powered features
- Built agentic systems: multi-step tool use, planning loops, context management, and evals
- Designed tool ecosystems for agents, including MCP
- Worked with sandboxed or isolated execution of generated code
- Operated services in production (Kubernetes, observability, incident response)
- A personal ecosystem of AI dev tooling: custom agents, skills, scripts, or workflows built to ship faster
- A background in time-series data, scientific computing, or hardware test and telemetry
- Built internal agentic tooling that accelerates an engineering org

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)

## Other roles at Sift Stack, Inc.

- [Software Engineer, Infrastructure](https://feeny.ai/job/software-engineer-infrastructure-sift-stack-inc-san-francisco-4xjy1bg37qf4) — San Francisco, CA
- [Senior Software Engineer, Infrastructure](https://feeny.ai/job/senior-software-engineer-infrastructure-sift-stack-inc-san-francisco-877gmtjqr1pd) — San Francisco, CA
- [Senior Software Engineer, Infrastructure](https://feeny.ai/job/senior-software-engineer-infrastructure-sift-stack-inc-marina-del-rey-k67b5td8ed9r) — Marina Del Rey, CA
- [Software Engineer, Infrastructure](https://feeny.ai/job/software-engineer-infrastructure-sift-stack-inc-marina-del-rey-n3fffbe2ghh1) — Marina Del Rey, CA
- [Field Marketing & Growth Lead](https://feeny.ai/job/field-marketing-growth-lead-sift-stack-inc-san-francisco-118aag3esj4c) — San Francisco, CA
- [Technical Market Development](https://feeny.ai/job/technical-market-development-sift-stack-inc-san-francisco-1z7vd5a20322) — San Francisco, CA
- [Technical Business Development Representative](https://feeny.ai/job/technical-business-development-representative-sift-stack-inc-san-francisco-4c7vyyxdxndw) — San Francisco, CA
- [Technical Market Development](https://feeny.ai/job/technical-market-development-sift-stack-inc-marina-del-rey-gs8bcg5234zs) — Marina Del Rey, CA
- [Technical Business Development Representative](https://feeny.ai/job/technical-business-development-representative-sift-stack-inc-marina-del-rey-kn24kqj9ky2f) — Marina Del Rey, CA
- [Software Engineer – New College Graduate](https://feeny.ai/job/software-engineer-new-college-graduate-sift-stack-inc-marina-del-rey-476tw8zz0m89) — Marina Del Rey, CA