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19 internal tools engineer jobs at 18 companies in Simi Valley, CA

1mo
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AI Product Engineer, Internal Tools
Calabasas, California, United States
$110k-$130k/yr HybridFull Time
PlanetArt
PlanetArt: Provides a mobile platform for ordering personalized photo products.
Public portfolio required; build and ship AI-powered internal tools and prototypes using AI-assisted tools and modern web stacks; strong prompt engineering, UX instincts, and communication skills; bachelor's preferred.
Cursor, Claude Code, Codex, GitHub Copilot, ChatGPT, v0, JavaScript, TypeScript, React, Next.js, Python, APIs, databases, GitHub, OpenAI, Anthropic, Google Gemini, Retool, Supabase, Firebase, Vercel, Airtable, n8n, Zapier, Make, Figma
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1mo
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Staff Software Engineer, Internal Tools
New York City or San Francisco or Los Angeles
$227k-$325k/yr HybridFull Time
Tubi
TubiNASDAQ: FOXA: Free ad-supported streaming service for movies and television.
8+ YOE8+ years software engineering experience; deep distributed systems expertise; strong full‑stack skills with Node.js/TypeScript, React/TypeScript, PostgreSQL/Drizzle ORM, and Python; experience integrating LLMs/AI into production systems.
Node.js, TypeScript, Express, React, PostgreSQL, Drizzle ORM, Python, OpenAI, Google Gemini, Claude Code, Codex, Cursor, MCP, LLM
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1w
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Developer Experience Engineer
El Segundo, California, United States
$170k-$195k/yr OnsiteFull Time
Picogrid
Picogrid: Develops hardware and software for autonomous defense systems.
3+ YOE3+ years in DevOps/platform/tooling with developer experience focus; experience with CI, internal tooling, Terraform/OpenTofu, Kubernetes, container/image hardening, and security scanning.
k3s, k3d, docker-compose, Github Actions, Golang, Python, Terraform, OpenTofu, Model Context Protocol (MCP), Kubernetes, Docker, Backstage
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2mo
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Development Engineer, Solid Rocket Motors
Los Angeles, California, United States
OnsiteFull Time
Furientis
Furientis: Develops cost-effective, high-volume interceptor missile systems.
5+ YOEB.S. in engineering or physics, 5+ years hands-on solid rocket motor development, fluency in composite-propellant motor design, internal-ballistics and thermochemistry tools, CAD (NX) proficiency, ground-test experience; must be a U.S. Person.
NX, Claude Code, Codex, OpenCode
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Senior Electrical Design Engineer 6
Dallas or Houston or Denver or Chicago or Los Angeles or Irvine or Concord or Carlsbad or Phoenix
$121k-$212k/yr HybridFull Time
CDM Smith
CDM Smith: Engineering and construction firm for global infrastructure projects.
10+ YOEPE license and bachelor's in electrical engineering (or equivalent), 10+ years electrical design experience, proficiency with SKM Power Tools or ETAP, Microsoft Word/Excel, US citizenship for federal work; domestic/international travel possible.
SKM Power Tools, ETAP, Microsoft Word, Microsoft Excel
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Software Engineer II – Test/Internal Tooling
Los Angeles, California, United States
$140k-$164k/yr OnsiteFull Time
Parallel Systems
Parallel Systems: Building autonomous battery-electric rail vehicles for freight transportation.
3+ YOE3+ years software development experience with scripting (Python, JS) and systems (C++, Rust); experience building test infrastructure (HITL/SITL), Linux, CI, test frameworks, mentoring, and cross-functional collaboration.
Python, JS, C++, Rust, Linux, CI
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Principal Engineer, Manufacturing Systems
Torrance, California, United States
$100k-$190k/yr OnsiteFull Time
Neros Technologies
Neros Technologies: Designs and manufactures American-made high-performance drones for defense.
8+ YOE8+ years software engineering experience with backend/platform/internal tools work; strong coding, API and integration design, production software delivery, cross-functional collaboration, and onsite factory support.
MES, ERP, QMS, CRM, WMS, APIs, ETL/ELT, CDC, message queues, RBAC, event-driven systems, integration platforms, barcode scanning
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AI Engineer
Woodland Hills, California, United States
OnsiteFull Time
GoodSuite
GoodSuite: Provider of managed IT, cybersecurity, and office technology services.
Hands-on experience building AI/LLM solutions using LLM APIs, Python or TypeScript, web frameworks, workflow automation, integrations, and internal tooling; MSP or IT services experience preferred.
OpenAI, Anthropic/Claude, Gemini, Python, TypeScript, Node.js, FastAPI, Flask, Express.js, n8n, Make, Zapier, Power Automate, React, Next.js, Retool, Streamlit, ConnectWise Manage, ConnectWise Automate, Microsoft 365, Azure AI, Microsoft Graph, SharePoint, Teams, GitHub
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Security Engineer II, Detection and Response
San Francisco or Vancouver or Phoenix or Los Angeles or Seattle or Austin or Portland or California or United States or Canada
$123k-$165k/yr RemoteFull Time
Circle
CircleNYSE: CRCL: Digital currency issuer and blockchain financial infrastructure provider.
2+ YOE2+ years in detection/response or security engineering; experience with incident response, AWS + EKS, AI tooling, MacOS internals, and programming in Python or Golang; familiarity with Slack and GSuite; able to take on-call shifts.
Slack, Apple MacOS, GSuite, SIEM, Orchestration platforms, AWS, EKS, AI tooling, Python, Golang
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Software Engineer, Staff
New York City or San Francisco or Seattle or Los Angeles or United States
$214k-$248k/yr RemoteFull Time
Check
Check: Provides embedded payroll infrastructure for software platforms.
Staff-level ownership of production systems, experience building internal tools or platforms, strong debugging and design skills, ability to collaborate cross-functionally, and willingness to work with Python/Django, React, TypeScript, AWS, Terraform, Postgres, Temporal, and GitHub.
Python, Django, React, TypeScript, AWS, Terraform, Postgres, Temporal, GitHub
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2mo
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AI Solutions Developer – Insurance Operations & Systems Integration
Los Angeles, California, United States
$100k-$150k/yr OnsiteFull Time
Knight Insurance Group
Knight Insurance Group: Provides specialty property and casualty insurance and underwriting services.
Develop AI-driven software for insurance operations; build internal tools, dashboards, API integrations; experience with AI-assisted development, web apps, SQL, and cloud/SaaS.
Python, JavaScript, Node.js, React, SQL, APIs, Cloud platforms
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Staff Software Engineer, Platform Services - Game Tech Group, Anti-Cheat
Los Angeles, California, United States
$193k-$269k/yr OnsiteFull Time
Riot Games
Riot Games: Developing and publishing competitive multiplayer video games.
Staff-level experience building backend platforms and internal tools; strong backend/distributed systems skills (AWS, Docker, Kubernetes); experience with Golang, React, Node.js, TypeScript; API design, production debugging, and strong communication.
AWS, Docker, Kubernetes, Golang, React, Node.js, TypeScript, CI/CD, LLMs, Agentic AI
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2mo
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Lead Product Manager - AI Developer Platform
San Francisco or Atlanta or Austin or Boston or Chicago or Dallas or Denver or Houston or Jacksonville or Los Angeles or Miami or New York City or Phoenix or Portland or Sacramento or Salt Lake City or San Diego or Seattle or Washington, D.C. or Ottawa or Toronto or Vancouver or Mexico City
$171k-$257k/yr HybridFull Time
Scribd
Scribd: Subscription-based digital library for e-books, audiobooks, and documents.
7+ YOE7+ years product management; experience with developer tooling, AI platforms, or internal productivity tools; strong technical fluency; proven cross-functional leadership; ability to define strategy and roadmap.
Claude Code, Codex, Cursor, Plugin marketplace, Agent runtime, Ruby, Go, TypeScript, Python, AWS, Databricks
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Analog Design Intern - Master's Degree (Quarter Schools / Fall 2026 Start Dates)
Westlake Village, California, United States
$39-$76/hr OnsiteInternship, Full Time
Marvell Technology
Marvell TechnologyNASDAQ: MRVL: Developing semiconductor solutions for cloud, enterprise, and AI infrastructure.
0+ YOEMS or PhD in electrical engineering; experience in analog/mixed-signal IC design; proficiency with EDA tools; experience in high-performance receiver design and layout; knowledge of transistor-level design and device physics.
EDA CAD tools, Analog/Mixed-signal IC design, SiGe BiCMOS, FinFET CMOS
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2mo
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Analog Design Intern - Master's Degree (Quarter Schools / Fall 2026 Start Dates)
Westlake Village, California, United States
$39-$76/hr OnsiteInternship
Marvell
MarvellNASDAQ: MRVL: Designs and develops high-performance semiconductor and infrastructure solutions.
0+ YOEMS or PhD in electrical engineering with analog/mixed-signal IC design focus; experience in high-performance receiver design; proficient with EDA CAD tools; analog custom layout; able to correlate simulations with measurements.
EDA CAD tools, Analog CAD
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1mo
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Operations Intern
South Gate, California, United States
OnsiteMultiple Commitments Available
Precision Castparts Corp.
Precision Castparts Corp.NYSE: BRK.B: Manufacturer of complex metal components for aerospace and industrial markets.
Pursuing a BS in engineering or business; ability to work on production floor (75%) and office (25%); strong math, analysis, problem-solving, blueprint reading, MS Office proficiency, and familiarity with quality systems and lean tools.
Microsoft Office, Microsoft Word, Microsoft Excel, Microsoft Access, Microsoft Outlook, Value Stream Mapping, Root Cause Analysis
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5d
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Precision Cleaning Intern (Fall 2026)
Redondo Beach, California, United States
$30/hr OnsiteInternship
Impulse Space
Impulse Space: Developing in-space transportation services and orbital transfer vehicles.
Currently enrolled in a bachelor’s or master’s engineering/materials program; familiarity with contamination control, machining impacts, lab tools; able to work on-site in Redondo Beach; U.S. citizenship or equivalent required.
microscopes, analytical balances, UV inspection
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1w
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Studio Intern
Los Angeles, California, United States
OnsiteMultiple Commitments Available
Create Music Group
Create Music Group: Provides digital distribution and rights management services for musicians.
Current college student eligible for U.S. work, 10–20 hrs/week availability, audio engineering training, Pro Tools/Logic Pro X experience, pitch editing (Autotune/Melodyne), reliable transportation, strong troubleshooting and time-management.
Pro Tools, Logic Pro X, Antares Autotune, Celemony Melodyne
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3w
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AI-First Engineering Intern
Los Angeles, California, United States
$20-$25/hr OnsiteInternship
Xsolla
Xsolla: Provides payment and monetization tools for game developers.
Experience using agentic AI coding tools, full-stack development comfort, proof-of-work portfolio (GitHub or deployed projects), currently a CS/software student or recent graduate, strong initiative and communication.
Claude Code, Cursor, Copilot, GitHub, APIs, SDKs, Loom
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