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How much do fullstack labs jobs pay per year?

As of Sep 13, 2026, the average yearly pay for fullstack labs in California is $133,006.00, according to ZipRecruiter salary data. Most workers in this role earn between $109,500.00 and $155,900.00 per year, depending on experience, location, and employer.

What is Fullstack Labs?

Fullstack Labs is a software development consultancy that specializes in building custom web and mobile applications for clients ranging from startups to large enterprises. Their team consists of experienced developers, designers, and project managers who work with a variety of technologies, including JavaScript frameworks like React, Angular, and Node.js, as well as mobile platforms and cloud services. Fullstack Labs is known for its agile development process, strong technical expertise, and focus on delivering high-quality software solutions tailored to each client's needs.

What types of projects do Fullstack Labs developers typically work on?

At Fullstack Labs, developers often collaborate on custom software solutions for a variety of clients, ranging from startups to large enterprises. These projects typically involve both frontend and backend development, requiring team members to be adaptable and comfortable switching between different technologies. Daily responsibilities may include participating in agile standups, writing clean and scalable code, conducting code reviews, and working closely with designers and project managers. The diversity of client projects keeps the work engaging and provides continuous opportunities to learn new frameworks and best practices.

What are the key skills and qualifications needed to thrive as a full stack developer?

To thrive as a Full Stack Developer, you need a solid understanding of both front-end and back-end technologies, proficiency in programming languages like JavaScript, Python, or Java, and experience with frameworks such as React and Node.js. Familiarity with version control systems (e.g., Git), databases (SQL/NoSQL), and deployment tools, along with relevant certifications, is valuable. Strong problem-solving, communication, and time management skills help you effectively collaborate and adapt to evolving project requirements. These skills and qualities are crucial for building robust, scalable applications and ensuring seamless integration between client and server sides.

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

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Fullstack Labs jobs near you
Infographic showing various Fullstack Labs job openings in California as of August 2026, with employment types broken down into 100% Full Time. Highlights an 74% In-person, and 26% Remote job distribution, with an average salary of $133,006 per year, or $63.9 per hour.

Software Engineer - Platform/Applied AI (Fullstack)

San Francisco, CA • On-site

AfterQuery
See more jobs at AfterQueryexternal

Other

This job post has expired 3 days ago. Applications are no longer accepted.

Job description

As one of our core engineers, you’ll be critical in creating data infrastructure that will be shaping the future development of frontier models. You will be one of our first hires, and will get a lot of responsibility, owning entire projects end-to-end – meaning you can see your impact instantly.

Company Overview

AfterQuery is a research lab investigating the boundaries and capabilities of artificial intelligence through novel datasets and experimentation. Our customers are the foundation model labs, and we serve all of the frontier AI labs.

We are based in San Francisco, CA, and have raised funding from top investors, including Y Combinator and BoxGroup, ex-partners from Lightspeed and Index Ventures, and senior leadership at Google DeepMind and Meta GenAI.

Our founding team brings backgrounds from Jane Street, Meta, Citadel Securities, Google, Goldman Sachs, Morgan Stanley, Silver Lake, Berkeley Artificial Intelligence Research (BAIR), and Stanford Artificial Intelligence Laboratory (SAIL).

Why Apply
  • Massive Opportunity: We were one of the fastest growing YC companies in our batch, and we believe we can be one of the fastest growing YC companies of all time
  • Founding role—you’ll define and own our data infrastructure from day one.
  • Equity & Growth – Competitive salary + equity. As we scale, you’ll have the opportunity to lead and grow an engineering team.
  • Strong Team: Founding team has experience from Citadel Securities, Meta, Google, Silver Lake, and Morgan Stanley – get to work with the best :)
Responsibilities
  • Build and scale complex data capturing workflows across web (Next.js) and desktop (Python)
  • Architect and optimize data pipelines that experience high throughput, with heavy loads
  • Collaborate with the founding team to define product strategy and ship features fast.
  • Set engineering best practices and lay the groundwork for future team growth.
Required Qualifications
  • Proficiency in JavaScript (Next.js) and Python, with demonstrated experience building full-stack web applications
  • Experience with serverless architecture and cloud functions for implementing heavy data processing (GCP/AWS)
  • Storage, caching & search: Hands‑on with Redis (caching), Elasticsearch (indexing), and message queues (Kafka/RabbitMQ) to build scalable, low‑latency pipelines.
  • Any background in AI research, LLM evaluation, or human‑in‑the‑loop systems
  • Experience getting your ideas into production (founder experience preferred)
Compensation
  • 180-220K base + dataset commission bonus (4% Gross Profits; 100k-400k w/ no cap) + equity (200-300K vested over 4 years)
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