Software Engineer Intern

2 days ago


San Francisco, California, United States Marketrix AI Full time

Location:
650 California Street, 7th Floor, San Francisco, CA

Type:
Internship (On Site)

Duration:
6 months

Compensation:
Stipend + potential for full-time conversion + equity

About Marketrix

Marketrix is building the next evolution of intelligent software — AI agents that
simulate, learn, and operate software like humans do
. Our vision is bold:
AGI through simulation.

We're a startup based in San Francisco, developing agentic systems that can explore products, understand them, and autonomously provide onboarding, support, and optimization.

The Role

We're looking for a passionate
Software Engineer Intern
to join our founding team in person at our San Francisco office. You'll work directly with the co-founders on core product engineering — from developing simulation engines and AI integrations to refining the user experience for our customers.

What You'll Do

  • Contribute to building Marketrix's simulation engine and agentic workflows
  • Work on web automation, AI/ML integrations, and front-end intelligence
  • Collaborate with the co-founders to prototype new features and deploy live builds
  • Write clean, scalable, and well-documented code
  • Participate in daily discussions around product strategy, performance, and UX
  • Assist in real-world PoCs with enterprise clients

What We're Looking For

  • Strong foundation in
    JavaScript, TypeScript, or Python
  • Experience with
    React
    ,

    , or similar modern frameworks
  • Familiarity with
    LLMs, APIs
    , or
    web automation tools (e.g., Puppeteer, Playwright)
    is a plus
  • Excellent problem-solving and debugging skills
  • Excited about AI, simulations, and building futuristic products
  • Must be available to work
    in person
    at our SF office

Why Join Us

  • Work directly with founders building cutting-edge agentic AI
  • Get exposure to product engineering, research, and early-stage startup execution
  • Opportunity for full-time conversion after internship
  • Build something the world hasn't seen before — and have fun doing it

To Apply:

Send your GitHub, LinkedIn, and a short note about a project you're proud of to


|


  • Software Engineer

    2 weeks ago


    San Francisco, California, United States Beacon Software Full time

    Beacon Software is a permanent capital holding company which acquires and grows essential businesses. We are a profitable series B+ firm that combines great technologists, operators and M&A professionals to accelerate the scale of the ambition of the dozens of businesses we own and operate. We are supported by capital from tier-1 venture capital, crossover,...


  • San Francisco, California, United States Mechanize Inc. Full time

    As a software engineering intern, you will assist the team in creating RL environments to sell to the leading AI labs. You might be a good fit if you are can write in python and you're highly intelligent.No prior machine learning or AI experience is required.


  • San Francisco, California, United States TJP Partners Full time

    Company DescriptionTJP Partners is a student-led investment management firm specializing in diversified strategies across public and private markets. The firm combines financial expertise with a commitment to impactful, measurable philanthropy. TJP Partners emphasizes innovation and leadership, providing students with hands-on opportunities to make...


  • San Francisco, California, United States Olive Full time

    This position is open for both Remote (US) and in-person (San Francisco, CA).About OliveWe're building the fastest way for companies to create internal tools—just by describing what they need in natural language.From sales dashboards to trust & safety workflows, internal tools are the operational backbone at modern companies. But building them is still...


  • San Francisco, California, United States Mercor Full time

    About MercorMercor is at the intersection of labor markets and AI research. We partner with leading AI labs and enterprises to provide the human intelligence essential to AI development.Our vast talent network trains frontier AI models in the same way teachers teach students: by sharing knowledge, experience, and context that can't be captured in code alone....


  • San Francisco, California, United States Benchling Full time

    Biotechnology is rewriting life as we know it, from the medicines we take, to the crops we grow, the materials we wear, and the household goods that we rely on every day. But moving at the new speed of science requires better technology.Benchling's mission is to unlock the power of biotechnology. The world's most innovative biotech companies use Benchling's...


  • San Francisco, California, United States A10 Networks, Inc Full time

    We're looking for a Software Engineering Intern excited about bridging ADC technology and AI-based flows. You'll help design and implement solutions integrating AI prompt evaluation into live systems handling various complex layer 7 application traffic such as DNS and HTTP.You'll join a fast-moving team working at the intersection of software engineering and...


  • San Francisco, California, United States Lumafield Full time

    About Lumafield:Lumafield was founded in 2019 to upgrade manufacturing. We are engineers with deep experience across the product development cycle, from initial ideas to shipping hardware, across industries and specializations, who became frustrated by the cost and complexity of modern manufacturing. So we decided to upgrade it. Engineers make...


  • San Francisco, California, United States Docusign Full time $48 - $59

    Company OverviewDocusign brings agreements to life. Over 1.5 million customers and more than a billion people in over 180 countries use Docusign solutions to accelerate the process of doing business and simplify people's lives. With intelligent agreement management, Docusign unleashes business-critical data that is trapped inside of documents. Until now,...


  • San Diego, California, United States Hologic Careers Full time $22 - $35

    Dive Into Discovery: R&D Software Engineering InternshipThe R&D Software Engineering team at Hologic in sunny San Diego is all about creating smart software for our cutting-edge diagnostic platforms. As an intern, you won't just be watching from the sidelines—you'll roll up your sleeves, join the team, and help us build real solutions that make a...