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Startup Software Developer Internship Jobs in Renton, WA

CADDi

Software Engineer Intern

Seattle, WA · On-site

$30 - $35/hr

Caddi is a seed-stage startup reimagining automation for professionals by transforming simple ... You'll work at the intersection of engineering, AI, and real-world software tooling--helping us ...

Caddi

Software Engineer Intern

Seattle, WA · On-site

$30 - $35/hr

Caddi is a seed-stage startup reimagining automation for professionals by transforming simple ... You'll work at the intersection of engineering, AI, and real-world software tooling-helping us ...

xAI

Exceptional Software Engineer

Seattle, WA · On-site

They are seeking an exceptional software engineer to tackle critical product or technical ... XAI is an artificial intelligence startup that develops AI solutions and tools to enhance reasoning ...

Amazon

Sr. Software Dev Engineer, Web Experiences

Seattle, WA · On-site

$139K - $183K/yr

About the team We're a collaborative group of engineers who operate with startup mentality within a ... BASIC QUALIFICATIONS - 5+ years of non-internship professional software development experience - 5+ ...

Microsoft AI

Principal Software Engineer

Redmond, WA · On-site

$151K - $202K/yr

The Principal Software Engineer will lead efforts to improve performance outcomes for Microsoft ... startup. • Lead architectural evolution to ensure browser performance remains durable as Edge ...

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Startup Software Developer Internship information

See Renton, WA salary details

$12

$25

$44

How much do startup software developer internship jobs pay per hour?

As of Jul 8, 2026, the average hourly pay for startup software developer internship in Renton, WA is $25.75, according to ZipRecruiter salary data. Most workers in this role earn between $20.82 and $27.31 per hour, depending on experience, location, and employer.

What is a Startup Software Developer Internship?

A Startup Software Developer Internship is a temporary position where interns work with a startup company to gain experience in software development. Interns typically assist with coding, debugging, testing, and sometimes designing software solutions under the guidance of experienced developers. Working in a startup environment often means exposure to a wide range of tasks and technologies, providing valuable hands-on learning. This type of internship is ideal for students or recent graduates looking to build their technical skills and learn how startups operate.

What are the key skills and qualifications needed to thrive as a Startup Software Developer Intern, and why are they important?

To thrive as a Startup Software Developer Intern, you need fundamental programming skills, familiarity with software development methodologies, and coursework or experience in computer science. Experience with version control systems like Git, and knowledge of popular frameworks or languages such as JavaScript, Python, or React, are typically expected. Strong problem-solving abilities, a collaborative mindset, and adaptability help interns excel in the dynamic and fast-paced startup environment. These skills and qualities are vital for quickly contributing to projects, learning on the job, and directly impacting the startup’s growth.

What unique challenges and learning opportunities can I expect as a Startup Software Developer Intern?

As a Startup Software Developer Intern, you'll likely work in a fast-paced and dynamic environment where you'll take on a variety of responsibilities, from coding new features to testing and deploying software. Startups often have smaller teams, so interns frequently collaborate directly with experienced developers, product managers, and even founders, giving you hands-on exposure to the full product lifecycle. You may encounter challenges such as shifting priorities, tight deadlines, and limited resources, but these situations offer valuable opportunities to develop problem-solving skills and adaptability. This role is ideal for those eager to learn quickly and make a tangible impact early in their careers.

What is the difference between Startup Software Developer Internship vs Startup Software Developer?

AspectStartup Software Developer InternshipStartup Software Developer
Required CredentialsTypically pursuing or recent graduate in CS or related fieldBachelor's or higher in CS or related field, some experience preferred
Work EnvironmentTemporary, learning-focused, mentored environmentFull-time, project-driven, collaborative environment
Employer & Industry UsageInternships offered by startups for entry-level experienceFull-time roles in startups, software development teams

The main difference is that a Startup Software Developer Internship is a temporary, learning-focused position for students or recent graduates, while a Startup Software Developer is a full-time role requiring more experience and responsibility. Internships serve as a stepping stone into the industry, whereas full-time developers contribute directly to ongoing projects and product development.

What are popular job titles related to Startup Software Developer Internship jobs in Renton, WA? For Startup Software Developer Internship jobs in Renton, WA, the most frequently searched job titles are:
What job categories do people searching Startup Software Developer Internship jobs in Renton, WA look for? The top searched job categories for Startup Software Developer Internship jobs in Renton, WA are:
What cities near Renton, WA are hiring for Startup Software Developer Internship jobs? Cities near Renton, WA with the most Startup Software Developer Internship job openings:
Startup Software Developer Internship jobs near you

Software Engineer Intern

CADDi

Seattle, WA • On-site

$30 - $35/hr

Internship

Re-posted 29 days ago

Job description

Caddi is a seed-stage startup reimagining automation for professionals by transforming simple screen recordings into fully automated workflows. We’re building the first true AI-powered automation assistant for lawyers, financial advisors, and other knowledge workers who want to eliminate busywork—without changing how they work.

We’re a small, fast-moving team based in Seattle, and we’re looking for a sharp, curious Software Engineering Intern to help us validate and improve the workflows built by our AI systems. You’ll work at the intersection of engineering, AI, and real-world software tooling—helping us scale from semi-automated processes to truly intelligent automation.

What You'll Do
  • Contribute to the development and refinement of our AI-driven automation engine by improving how workflows are interpreted, validated, and executed.
  • Write and debug Python and/or Go code to enhance core backend systems that interact with large language models and automation agents.
  • Build lightweight tools to inspect, simulate, and evaluate AI-generated plans and their interactions with third-party systems.
  • Collaborate closely with founding engineers to expand our AI pipeline’s ability to generalize across user environments.
  • Identify edge cases, inconsistencies, and learnings from real data to improve model prompts, heuristics, and product design.

Requirements

  • Currently pursuing or recently completed a degree in Computer Science, Software Engineering, or related field.
  • Comfortable with scripting and light backend development (Python and/or Golang experience preferred).
  • Strong problem-solving and debugging skills—you enjoy figuring out how things work and making them better.
  • Detail-oriented and methodical—you’ll be working closely with real user workflows and production-level automation logic.
  • Based in or able to work from our office in Seattle (Belltown). This is an in-person role.

Benefits

  • Work on the frontier of AI and automation in a fast-paced startup environment.
  • Your contributions will directly shape our product, improve our AI system, and drive user impact.
  • Great mentorship opportunity with experienced founders and engineers.
  • Ideal experience for aspiring backend engineers, systems thinkers, or future founders.
  • Compensation: $30–35/hour, depending on experience and time commitment (30–40 hours/week).