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31 custom software engineer jobs at 24 companies in Simi Valley, CA

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Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
Help us #BeatIndeed & #BeatLinkedIn
1w
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Senior Software Engineer, Fleet & Planning
Atlanta or Boston or Chicago or Denver or Los Angeles or New York City or San Francisco or Austin or United States
$160k-$190k/yr RemoteFull Time
Flock Safety
Flock Safety: Sells AI-powered cameras and software for public safety surveillance.
Senior software engineer experienced with Typescript/Node, modern web frameworks (React), SQL, Docker, Helm, Kubernetes, and AWS; builds geospatial routing, automated permitting, and customer dashboards; CJIS eligibility required.
Typescript, Node, React, Vue, Angular, SQL, Docker, Helm, Kubernetes, AWS, S3, API Gateway, SQS, Claude, Copilot, Codex
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2mo
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Staff Software Engineer
El Segundo, California, United States
$190k-$250k/yr OnsiteFull Time
Picogrid
Picogrid: Develops hardware and software for autonomous defense systems.
7+ YOE7+ years backend engineering; Go/Python/Rust/C/C++/TypeScript; APIs, distributed systems, data pipelines; PostgreSQL, S3/MinIO; HTTP APIs (REST/gRPC/GraphQL); customer collaboration; ownership and urgency.
Go, Python, Rust, C++, TypeScript, PostgreSQL, S3, MinIO, REST, gRPC, GraphQL
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1mo
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Senior Software Engineer, Fullstack
Playa Vista or United States
$160k-$190k/yr HybridFull Time
Thrive Market
Thrive Market: Membership-based online grocery store selling natural and organic products.
5+ YOE5+ years building and operating high-traffic customer-facing systems; strong CS fundamentals, OO and relational DB design; experience with eventing (Kafka, SNS, SQS), workflow (Temporal, Airflow), PHP/Magento, React/Next, AWS, and observability (New Relic, Datadog).
Kafka, SNS, SQS, Temporal, Airflow, DAGs, PHP, Magento, React, Next, AWS Lambda, S3, CloudWatch, New Relic, Datadog
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2mo
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Senior Systems Software Engineer
Los Angeles or Remote- US
$145k-$195k/yr HybridFull Time
Zoo
Zoo: Develops infrastructure and AI-powered tools for hardware design.
Senior systems, platform, or infrastructure engineering with Rust expertise; strong backend/infrastructure focus; experience with distributed systems, databases, APIs, and IaC; autonomous, proactive, and customer-focused.
Rust, Databases, API design, Distributed systems, Infrastructure as code, Containers, React
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1mo
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Staff Software Engineer, Network Expansion
Santa Monica or New York City or Seattle
$220k-$250k/yr HybridFull Time
Metropolis
Metropolis: Computer vision technology for checkout-free parking and retail payments.
10+ YOEMS/BS in Computer Science or equivalent, 10+ years building distributed, customer-facing systems; experience with microservices, event-driven architectures, CI/CD, TDD/BDD, MySQL/Postgres; strong communication and cross-functional leadership; ability to work on-site in Santa Monica, NYC, or Seattle.
TypeScript, React, Scala, Java, MySQL, PostgreSQL, Snowflake, AWS, Git, GitHub, Copilot, Claude Code, Datadog
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2d
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Deployed Engineer
Los Angeles, California, United States
$120k-$160k/yr OnsiteFull Time
Apex
Apex: Mass-manufactures standardized satellite buses for commercial and government use.
Bachelor's in a technical field, strong software engineering background, experience troubleshooting lab/integration/field systems, familiarity with Linux/Python/C/C++, ability to read technical documentation, and willingness to travel to customer sites.
Linux, Python, C/C++, Networking, test automation, APIs
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3w
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Customer Success Automation Engineer
San Francisco or Culver City or Dallas or Los Angeles
HybridFull Time
Altruist
Altruist: Provides a digital custodian and portfolio management platform for advisors.
5+ YOE5+ years software engineering with production experience; strong product instincts; experience with LLMs, agent frameworks, Python, APIs, webhooks, Salesforce; customer-focused and data-driven.
Python, LLMs, OpenAI, Anthropic, Gemini, LangChain, LlamaIndex, CrewAI, RAG architectures, APIs, webhooks, Salesforce, Service Cloud, Experience Cloud, Apex, Flow, Salesforce APIs
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1mo
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Senior Fullstack Engineer - Growth + Onboarding
New York City or San Francisco or Los Angeles
$180k-$210k/yr HybridFull Time
Pivotal Health
Pivotal Health: AI platform automating healthcare insurance claim disputes for providers.
6+ YOE2+ Mgmt6+ years software engineering experience with recent backend work, 2+ years managing engineers, experience with integrations and third-party APIs, customer-facing communication, Python familiarity, and Bachelor's in STEM preferred.
EDI, 835/837, HL7, FHIR, ICD-10, CPT, Epic, Cerner, SFTP, Python
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3w
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Forward Deployed Engineer
El Segundo, California, United States
$143k-$165k/yr OnsiteFull Time
Istari Digital
Istari Digital: Provides digital engineering software for aerospace and defense industries.
Strong software engineering fundamentals; hands-on experience with CAD/CFD/FEM toolchains; ability to work onsite with U.S. defense/aerospace customers; U.S. citizenship and clearance eligibility required.
CAD, CFD, FEM, Model-Based Systems Engineering (MBSE)
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3d
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Senior Product Engineer, 0→1
Los Angeles or United States
$170k-$185k/yr HybridFull Time
Revenue.io
Revenue.io: AI platform providing real-time guidance for sales professionals.
4+ YOE4+ years software engineering building customer-facing, full-stack products; experience with APIs, SQL, AI-augmented workflows; strong product judgment and 0→1 experience.
APIs, SQL, Salesforce
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3w
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Software Development Manager, AWS Neuron SDK - Distributed Training
Cupertino or Los Angeles County
$213k-$288k/yr OnsiteFull Time
Amazon
AmazonNASDAQ: AMZN: Global online retail and cloud computing technology provider.
7+ YOE3+ MgmtSenior engineering manager with experience scaling and stabilizing distributed ML training across thousands of nodes; strong software design, OOP, data structures, algorithms, and full lifecycle development; experience with PyTorch/JAX/XLA and customer engagement.
PyTorch, JAX, XLA, AWS Neuron
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1mo
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Robotics Engineer: Applications
Tijuana or Mexicali or Los Angeles
$360k-$580k/yr FieldFull Time
GrayMatter Robotics
GrayMatter Robotics: Develops autonomous robotic systems for industrial surface finishing applications.
2+ YOE2+ years hands-on hardware and software experience in manufacturing automation, Linux proficiency, remote support, bilingual Spanish/English, willingness to travel to customer sites up to 75%, and authorization to work in Mexico.
Linux, ROS, Python, C++
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1w
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Forward Deployed Engineer
Los Angeles or San Francisco
$120k-$250k/yr OnsiteFull Time
Hadrian
Hadrian: Building autonomous factories for aerospace and defense manufacturing.
Build end-to-end customer solutions, integrate and extend the Opus platform, develop production-grade software, work directly with customers and operators, and use AI-enabled tools to accelerate discovery and delivery.
Opus, GitHub
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2w
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Senior Spacecraft GNC Engineer I/II - Secret Clearance
Long Beach, California, United States
$140k-$190k/yr OnsiteFull Time
Rocket Lab
Rocket LabNasdaq: RKLB: Operates launch vehicles and manufactures satellites for space missions.
5+ YOEB.S. in engineering, 5+ years GNC/ADCS experience (8+ for level II), active Secret clearance, US citizenship, experience with flight software, simulations, and customer interfacing.
Jira
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1mo
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Forward Deployed Engineer IV, GenAI, Google Cloud
San Francisco or Atlanta or Austin or Boulder or Cambridge or Chicago or Addison or Detroit or Irvine or Kirkland or Los Angeles or Miami or Mountain View or New York or Portland or Reston or San Diego or Seattle or Sunnyvale or Washington D.C.
$207k-$300k/yr OnsiteFull Time
Google
GoogleNASDAQ: GOOGL: Provides online search, advertising, cloud computing, and consumer electronics.
8+ YOEBachelor’s in Engineering or Computer Science; 8+ years software development; experience building data pipelines and AI solutions; cloud experience; customer engagements.
Python, Data pipelines, Vector databases, RAG architectures, Cloud platforms (GCP), AI/ML frameworks
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3w
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AI Data Engineer
Santa Monica or United States
$80k-$100k/yr HybridFull Time
UJET
UJET: Cloud-native AI-powered contact center platform for customer service.
Bachelor's in CS or equivalent; production data-pipeline/integration engineering experience; strong SQL; cloud provider and IAM experience; git/CI workflow; customer-facing technical communication; comfortable using LLM APIs.
git, CI, LLM APIs, Temporal, OAuth, Salesforce JWT Bearer, AWS CDK, Terraform, ClickHouse, BigQuery, Snowflake, Redshift, DuckDB, Anthropic, OpenAI, AWS Bedrock, SQL
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2mo
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Field Service Engineer, Advanc
El Segundo, California, United States
$84k-$140k/yr HybridFull Time
Keysight Technologies
Keysight TechnologiesNYSE: KEYS: Provides electronic design, test, and simulation software and hardware.
5+ YOEBachelor's degree or technical equivalent; 5+ years field customer support; calibration experience to 50 GHz; ISO/IEC 17025, ISO 9001, ANSI/NCSL Z540-3 knowledge; driver’s license; ability to lift 50 lbs; overtime and weekend availability.
Calibration software, STE, TME, ETMS, PC-based software
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1mo
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GTM Engineer
Santa Monica, California, United States
OnsiteFull Time
Home From College
Home From College: Marketplace platform connecting college students with professional opportunities.
Build and ship growth systems across marketing, sales, and customer success; strong full-stack coding (Python/JS/SQL); experience with GTM data, CRM, and analytics.
Python, TypeScript/JavaScript, SQL, Next.js, React, Node, Postgres, Claude Code, ChatGPT, HubSpot, Mailchimp, Klaviyo, Clay, Mixpanel, GA4, Intercom, Notion, Figma, Vercel, GitHub, Linear
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5d
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Senior Frontend Engineer
New York City or San Francisco or Los Angeles
$140k-$160k/yr RemoteFull Time
Output
Output: Develops creative software instruments and tools for musicians.
6+ YOE6+ years building customer-facing frontend apps with JavaScript/TypeScript and component frameworks; strong web performance, UX, API integration, and autonomous product ownership.
JavaScript, TypeScript, React, HTML, CSS, Git, Web Audio, Canvas, WebGL, RESTful API
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1w
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Web Developer
Santa Monica, California, United States
OnsiteContract, Full Time
Helios Worldwide
Helios Worldwide: Global agency providing AI-powered marketing and workforce management solutions.
Experience building and customizing Webflow and Shopify sites; strong HTML5, CSS3, JavaScript, API integration, responsive design, Git; e-commerce and debugging skills.
Webflow, Shopify, HTML5, CSS3, JavaScript, APIs, Git, GitHub
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