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Internship Back End Developer Jobs in Seattle, WA

OpenAI

Backend Software Engineer (Evals)

Seattle, WA · On-site

$266K - $445K/yr

From customer operations to engineering, we develop an ecosystem of automation products that ... excluding internships) * Proficiency in backend technologies. Our tech stack includes Python ...

Plaid Inc

Software Engineer, Backend

Seattle, WA · On-site

$176K - $226K/yr

You will work across the stack, from reliable backend services and APIs to intuitive applications ... Qualifications: * 1-4 years of software engineering experience (post-internship). * Proven ability ...

Clerkie

Software Engineer Internship

Seattle, WA · On-site +1

$80/hr

You'll work across the full stack, collaborating with engineers on frontend, backend, and ... This isn't just another internship - it's an investment in your growth. The ideal Clerkie team ...

Stoke Space

Summer 2027 Internship - Software

Kent, WA · On-site

$40/hr

Exceptional command of engineering fundamentals * Hands-on engineering experience through ... Experience in front-end or back-end software development Preferred qualifications: * Experience in ...

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How much do internship back end developer jobs pay per hour?

As of Sep 7, 2026, the average hourly pay for internship back end developer in Seattle, WA is $65.70, according to ZipRecruiter salary data. Most workers in this role earn between $53.89 and $77.69 per hour, depending on experience, location, and employer.

What does an internship back end developer do?

An Internship Back End Developer assists in building and maintaining the server-side logic of web applications. Their responsibilities typically include working with databases, creating APIs, and ensuring the performance and security of server-side processes. Interns in this role often collaborate with front-end developers and other team members to deliver functional and efficient software solutions. They also gain hands-on experience with programming languages such as Python, Java, or Node.js, and learn industry best practices for code quality and deployment.

What are the key skills and qualifications needed to thrive as an internship back end developer?

To thrive as an Internship Back End Developer, you need a solid understanding of programming languages such as Java, Python, or Node.js, as well as basic knowledge of databases and web server architecture. Familiarity with version control systems like Git and exposure to RESTful APIs or frameworks such as Django or Express are typically required. Strong problem-solving skills, attention to detail, and the ability to collaborate effectively within a team help interns stand out. These skills and qualities are crucial for building reliable server-side applications, integrating systems, and contributing meaningfully to software development projects.

What types of projects and responsibilities can I expect as an internship back end developer?

As an Internship Back End Developer, you will typically work on supporting the development and maintenance of server-side applications, databases, and APIs. Your daily tasks may include writing and testing code, debugging issues, collaborating with front-end developers to integrate user-facing elements, and participating in code reviews. You'll likely work closely with mentors and other team members, gaining exposure to industry-standard tools and development practices. This hands-on experience helps you build a strong technical foundation and can open doors to full-time opportunities within the company or broader industry.

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Internship Back End Developer jobs near you
Infographic showing various Internship Back End Developer job openings in Seattle, WA as of August 2026, with employment types broken down into 1% As Needed, 77% Full Time, 16% Part Time, 1% Temporary, and 5% Contract. Highlights an 89% Physical, 4% Hybrid, and 7% Remote job distribution, with an average salary of $136,661 per year, or $65.7 per hour.

Backend Software Engineer (Evals)

OpenAI

Seattle, WA • On-site

$266K - $445K/yr

Full-time

Re-posted 22 days ago

Key responsibilities

  • Design, build, and maintain eval pipelines, infrastructure for continuous eval monitoring, and feedback loops to measure and improve support automation.

  • Develop backend services and APIs to support intelligent automation and knowledge systems, integrating and structuring data for AI workflows.

  • Collaborate with data, research, and engineering teams to integrate OpenAI models into high-leverage workflows and own the full development lifecycle of backend systems.

Job description

About the Team
The Support Automation team at OpenAI scales the organization by applying cutting-edge AI models to real-world challenges, automating and enhancing work across the organization. From customer operations to engineering, we develop an ecosystem of automation products that empower our colleagues and drive impact. We're passionate about crafting products that serve those around us, blending rapid prototyping with a focus on long-term quality and reliability. By creating reusable solutions, we create patterns that can be applied across diverse domains within OpenAI.
TLDR: this team leverages OpenAI technology to improve OpenAI, and you'll have the opportunity to leverage the full extent of our tech (both public and pre-released) to accomplish this mission.
About the Role
We're looking for a Backend Software Engineer with experience working in ML/LLM-heavy domains to help to design and build an evals infrastructure that measures the quality of OpenAI's support automation. This is a deeply technical and highly cross-functional role where you'll build robust systems and backend services that serve as the foundation for how knowledge is created, accessed, and applied across OpenAI. The role will especially focus on working closely with Data Science and Research partners to design and build evals at scale.
In this role, you will:
  • Design eval pipelines that are reliable, reproducible, and extendable
  • Build the infrastructure for continuous eval monitoring frameworks (regression/drift monitoring, building robust golden datasets) along with feedback loops that ultimately strengthen support automation
  • Design, build, and maintain backend services and APIs to support intelligent automation and knowledge systems
  • Integrate and structure data across internal platforms, transforming it into formats optimized for use by downstream systems and AI workflows.
  • Collaborate closely with data, research, and engineering teams to integrate OpenAI models into high-leverage workflows
  • Own the full development lifecycle of new backend systems and internal platform capabilities
  • Build with scale and maintainability in mind, while rapidly iterating on new ideas

You might be a great fit if you have:
  • 4+ years of backend engineering experience at product-driven companies (excluding internships)
  • Proficiency in backend technologies. Our tech stack includes Python, FastAPI, and Postgres
  • Experience designing and scaling distributed systems, APIs, or data processing pipelines
  • Have experience building AI agents or applications, including designing evals and improving performance through prompting or scaffolding
  • Are familiar with evaluation methods for LLMs and have worked with patterns like multi-agent workflows, tool use, or long context.
  • Experience creating production evals and/or measuring performance of ML/LLM models at scale
  • A pragmatic mindset. You're comfortable shipping iteratively while building toward a long-term vision

About OpenAI
OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity.
We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic.
For additional information, please see OpenAI's Affirmative Action and Equal Employment Opportunity Policy Statement.
Background checks for applicants will be administered in accordance with applicable law, and qualified applicants with arrest or conviction records will be considered for employment consistent with those laws, including the San Francisco Fair Chance Ordinance, the Los Angeles County Fair Chance Ordinance for Employers, and the California Fair Chance Act, for US-based candidates. For unincorporated Los Angeles County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: protect computer hardware entrusted to you from theft, loss or damage; return all computer hardware in your possession (including the data contained therein) upon termination of employment or end of assignment; and maintain the confidentiality of proprietary, confidential, and non-public information. In addition, job duties require access to secure and protected information technology systems and related data security obligations.
To notify OpenAI that you believe this job posting is non-compliant, please submit a report through this form. No response will be provided to inquiries unrelated to job posting compliance.
We are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made via this link.
OpenAI Global Applicant Privacy Policy
At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.

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