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Addon Jobs in California (NOW HIRING)

ECOLA Service, Inc.

Termite Annual Inspector

Oxnard, CA · On-site

$23/hr

You will actively look for opportunities to add value through additional services and addon sales, while maintaining a professional, consultative sales approach. You will perform termite treatments ...

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Addon information

What is an addon?

Addons are additional software components or features that can be installed to enhance or extend the functionality of a primary application, platform, or service. They allow users to customize their experience by adding new capabilities, tools, or integrations that aren't included in the base product. Addons are commonly used in web browsers, gaming platforms, and business applications to provide extra features such as security enhancements, productivity tools, or aesthetic changes. They are typically developed either by the original software provider or by third-party developers, and can often be downloaded from official marketplaces or repositories.

What are the key skills and qualifications needed to thrive as an addon developer?

To thrive as an Addon Developer, you need strong programming skills (such as JavaScript, Lua, or Python) and a solid understanding of the platform or software ecosystem you are developing for, often supported by relevant experience or certifications. Familiarity with version control systems (like Git), APIs, and addon development frameworks or SDKs is typically required. Creativity, problem-solving ability, and effective communication help you design user-friendly features and collaborate with stakeholders. These skills are crucial for building reliable, effective addons that enhance user experience and integrate seamlessly with target platforms.

How do addon developers typically collaborate with core product teams to ensure seamless integration?

Addon developers often work closely with core product teams to ensure that their add-ons are compatible and enhance the main product's functionality. This collaboration usually involves regular meetings, code reviews, and shared documentation to keep both teams aligned on technical standards and user experience. Developers may also participate in testing cycles to identify and resolve integration issues early. Open communication and adherence to the product's development guidelines are key to successful collaboration.

What is the difference between Addon vs Installer?

AspectAddonInstaller
Required credentialsTypically no formal credentials, but technical knowledge helpsOften requires technical certifications or training
Work environmentSoftware or hardware environment, often remote or on-sitePrimarily on-site or remote setup environments
Employer and industry usageUsed in software, gaming, and hardware industriesCommon in construction, manufacturing, and tech industries
Common search and comparison intentPeople compare to understand additional features or componentsPeople compare to understand installation processes or roles

In summary, an Addon typically refers to additional features or components added to existing software or hardware, often requiring minimal formal credentials. An Installer, on the other hand, is responsible for setting up or installing systems, often needing technical certifications. Both roles are essential in their respective industries but differ mainly in scope and required expertise.

What are popular job titles related to Addon jobs in California?

For Addon jobs in California, the most frequently searched job titles are:

What job categories do people searching Addon jobs in California look for?

The top searched job categories for Addon jobs in California are:

Addon jobs near you
Infographic showing various Addon job openings in California as of August 2026, with employment types broken down into 2% As Needed, 85% Full Time, 7% Part Time, 1% Temporary, and 5% Contract. Highlights an 91% Physical, 6% Hybrid, and 3% Remote job distribution.

Software Engineer (TypeScript/JavaScript)

Databento

San Francisco, CA • On-site, Remote

Full-time

Re-posted 3 days ago

Job description

The financial industry is growing at a record pace, but our data providers are still stuck in the past — with cumbersome onboarding processes, complicated APIs, slow infrastructure, and expensive licensing costs.

Databento is the market data platform for modern finance. The company provides real-time and historical data across futures, options, and equities through a unified API. By owning the entire market data stack end-to-end, Databento is the first platform of its kind to combine the performance and reliability demanded by the world's leading trading firms with a dramatically simpler developer experience. Our team includes alumni of Two Sigma, Citadel Securities, Flow Traders, Tower Research, PDT Partners, SIG, and other top quantitative firms.

We're looking for a midlevel or senior IC to join our Platform/API engineering team. You'll be responsible for building, maintaining, and promoting our JavaScript client library, working closely with our design team to bring production-ready interfaces to life. This role is primarily focused on TypeScript/JavaScript, with some full-stack/Python work as well.

Responsibilities
  • Own, build, and maintain our JavaScript client library, ensuring it is robust, well-tested, and easy for external users to integrate with.
  • Integrate native libraries into JavaScript/TypeScript code using tools like N-API, node-addon-api, or Wasm.
  • Build responsive, performant front-end applications using React, Redux, Vite, Web Workers, and WebSockets.
  • Contribute to full-stack projects, including backend work in Python (or Rust), REST API design, and database/migration work.
  • Work between design and engineering teams to translate designs (e.g. Figma handoffs) into production-ready components and design systems.
  • Set up and maintain CI/CD pipelines, including publishing to npm.
  • Document components using Storybook or similar tooling.
  • Collaborate cross-functionally to ensure smooth feature rollouts and updates.
Preferred background
  • Experience working between high-performing design and engineering teams, including production-ready design systems and tools (e.g. Figma handoffs).
  • Proficiency with React, Redux, Vite, Web Workers, and WebSockets.
  • Background in trading, market data, or quantitative finance.
  • Hands-on backend experience building APIs, working with databases, and migrations.
  • Full-stack experience with backends in Python or Rust, including REST API design.
  • Familiarity with Storybook or similar component documentation tooling.
  • Good communication skills and work ethic for a remote workplace.
Notice about phishing scams

Be cautious of phishing scams impersonating Databento that offer fake job interviews and request purchases. Official emails come only from @databento.com or us.greenhouse-mail.io (our ATS). Any other domains (e.g., databento-careers.com, databento.online) are fraudulent.

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Databento, Inc. provides equal employment opportunities to all employees and applicants without regard to race, color, religion, sex, national origin, age, disability, sexual orientation, gender identity or expression, veteran status, or genetics. In addition to federal law requirements, we comply with applicable state and local laws governing nondiscrimination in every location where we operate. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training. Pursuant to applicable laws, we consider qualified applicants with arrest or conviction records. If you need an accommodation, please let us know.

Our recruiting data suggests that underrepresented applicants often downplay their skills. Even if your experience doesn't exactly match the qualifications listed, we still want to hear from you. Please apply!