Mechanical Engineering Internship For Fall 2026 jobs in San Francisco – Browse 5,384 openings on RoboApply Jobs

Mechanical Engineering Internship For Fall 2026 jobs in San Francisco

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companyAstranis logo
Internship|On-site|San Francisco

Astranis builds advanced satellites for high orbits, expanding access to secure and dedicated networks for clients such as large enterprises, governments, and the US military. With five satellites in orbit and more launches ahead, Astranis supports a commercial contract backlog exceeding $1 billion. The company is headquartered in Northern California and employs 450 engineers and entrepreneurs, backed by over $750 million from investors like Andreessen Horowitz, Blackrock, and Fidelity. The Associate Mechanical Engineer - Fall 2026 Program is a twelve-week, salaried role based in San Francisco. This program is designed for candidates who have completed or will complete their bachelor’s degree before joining. The position offers the chance to work on projects that match the complexity and impact of those assigned to full-time engineers. Role overview Work alongside the engineering team to design, build, and test satellite hardware or software. What you will do Associate Engineers at Astranis contribute directly to challenging engineering projects. Past participants have designed and tested hardware or software for the company’s first satellite. Many have continued on to full-time roles. This program emphasizes hands-on experience and meaningful project ownership. Requirements Bachelor’s degree completed or expected before the program start date Interest in satellite hardware or software engineering Note: Current college students should consider applying for the Astranis Internship program instead.

Apr 29, 2026
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companyaisafety logo
Internship|On-site|San Francisco, CA

Join aisafety as a Research Engineer Intern for the Fall 2026 term! This internship is an excellent opportunity to gain hands-on experience in the field of safety engineering, where you will collaborate with seasoned professionals on innovative projects. You will be involved in research and development activities, contributing to advancements in safety solutions.

Mar 5, 2026
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companyAstranis logo
Internship|On-site|San Francisco

Astranis develops advanced satellites for high-orbit missions, supporting secure networks for clients ranging from large enterprises to governments and the US military. With five satellites launched and more in development, Astranis manages a commercial contract backlog of over $1 billion. The company has raised more than $750 million from leading investors, including Andreessen Horowitz, Blackrock, and Fidelity. The team of 450 engineers and entrepreneurs operates from a 153,000 sq. ft. headquarters in Northern California. Internship Overview The Mechanical Engineering Internship for Fall 2026 is a twelve-week, hourly position designed for students enrolled in a four-year university program. Interns join the engineering team to work on substantial, hands-on projects that impact Astranis satellites directly. Many past interns have contributed to hardware and software for the company’s first satellite, with several moving on to full-time roles at Astranis. Recent graduates are encouraged to apply for Associate Engineer positions instead. What You Will Do Work closely with engineers to design, build, and test satellite hardware and software. Design, evaluate, procure, assemble, and test structures, mechanisms, and bracketry for spacecraft, using a variety of manufacturing methods for both composite and metallic parts. Perform mechanical and thermal analyses on spacecraft systems. Integrate components and systems into spacecraft, collaborate on documentation, and help improve build processes for future projects.

Apr 29, 2026
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companyNotion Labs Inc. logo
Internship|On-site|San Francisco, California

Join Notion Labs Inc. as a Software Engineer Intern for the Fall 2026 semester! This is an exciting opportunity to work in a dynamic environment where you will contribute to innovative projects and gain hands-on experience with cutting-edge technologies.As an intern, you will collaborate with our talented engineering team to develop and improve our software solutions. You'll have the chance to enhance your skills in programming, problem-solving, and teamwork while making a real impact in our organization.

Apr 6, 2026
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companyMechanize logo
Internship|On-site|San Francisco

At Mechanize, we are pioneering the development of Reinforcement Learning (RL) environments tailored to train AI models for real-world applications. Our ambition is to facilitate the complete automation of the economy, partnering with leading AI laboratories. Discover more at mechanize.work.As a Software Engineering Intern at Mechanize, you will play a pivotal role in assisting our team to develop these groundbreaking RL environments. If you have a solid command of Python programming and possess a keen intellect, we would love to hear from you.We are currently seeking interns for Winter 2026, Spring 2026, and Summer 2026.No prior experience in machine learning or AI is necessary.Curious about our interview process? Learn more here: https://www.mechanize.work/how-our-interview-process-works/

Nov 19, 2025
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companyHandshake logo
Internship|On-site|San Francisco, CA

Join Handshake as a Student Researcher for the Fall 2026 semester! This exciting role offers you the chance to contribute to innovative research projects while gaining valuable experience in a dynamic environment. As a Student Researcher, you will work closely with leading professionals, enhance your analytical skills, and immerse yourself in real-world applications of your studies.

Apr 8, 2026
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companySierra logo
Internship|On-site|San Francisco, CA

Join Sierra as an Intern in Agent Development for the Fall 2026 semester! This is an exciting opportunity to gain hands-on experience in a dynamic and innovative environment. As an intern, you will collaborate with our talented team to support various projects aimed at enhancing agent performance and development strategies.

Mar 19, 2026
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companyAtomic Semi logo
Internship|$105K/yr - $105K/yr|On-site|San Francisco Office

About Atomic SemiAtomic Semi is at the forefront of advancing semiconductor manufacturing with a focus on building a compact, agile fabrication facility.Leveraging current technology and innovative simplifications, we are determined to create our own tools for rapid iteration and enhancement.Our exceptional team comprises a diverse array of engineers specializing in mechanical, electrical, hardware, computer, and process engineering. Together, we are committed to owning the entire stack from atomic structures to architectural designs. We thrive on optimism and are eager to push the boundaries of technological innovation.We believe in the motto: smaller is better, faster is better, and building it ourselves is better.Our lab is equipped with advanced 3D printers, an extensive selection of microscopes, e-beam writers, and general fabrication tools. If we identify any gaps, we will invent the necessary solutions.Founded by Sam Zeloof and Jim Keller, Atomic Semi is driven by a passion for innovation. Sam gained recognition for his garage-built chips, while Jim boasts over 40 years of leadership in the semiconductor sector.About the RoleWe are seeking enthusiastic Mechanical Engineering Interns for the upcoming fall term, commencing in September. The internship requires a commitment of 4 to 8 months. As we reconstruct the chip fabrication process from the ground up, you will engage in significant and meaningful projects. Our engineering endeavors span multiple disciplines including structures, optics, robotics, heat transfer, physics, and chemistry. As a startup, we provide interns with substantial ownership and critical missions.The ideal candidate will have practical experience in at least one of these domains and broad exposure to others. Our philosophy emphasizes rapid prototyping and testing—projects should be built and evaluated in days or weeks, not months. To apply, a portfolio showcasing your completed projects is required. If you have successfully delivered a medium-to-high complexity system through personal projects or prior internships, you would be an excellent fit for our team.

Mar 30, 2026
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companyCloudflare, Inc. logo
Internship|On-site|In-Office

Join Cloudflare as a Software Engineer Intern for the Summer of 2026! This is an exciting opportunity to gain hands-on experience in the tech industry, working alongside our talented engineers. You will contribute to meaningful projects, collaborate with cross-functional teams, and develop your skills in a dynamic and innovative environment.

Feb 6, 2026
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companyCloudflare, Inc. logo
Internship|On-site|In-Office

Join Cloudflare as a Research Engineer Intern for the Summer 2026 session! This is a fantastic opportunity for students and recent graduates to gain hands-on experience in a leading tech company. As a Research Engineer Intern, you will collaborate with experienced engineers and be involved in groundbreaking research projects that enhance our product offerings and overall service quality.

Feb 6, 2026
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companyCloudflare, Inc. logo
Internship|On-site|In-Office

Join Cloudflare as a Security Engineer Intern for the summer of 2026! This is an exciting opportunity to gain hands-on experience in the field of cybersecurity. You will work alongside seasoned engineers, tackling real-world security challenges and contributing to projects that protect our customers' data and privacy.As a part of our dynamic team, you will learn about security protocols, threat detection, and incident response while honing your technical skills. We value innovative thinking and enjoy a collaborative work environment where your ideas can make a difference.

Feb 6, 2026
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companySyska Hennessy Group logo
Internship|$22/hr - $25/hr|On-site|San Francisco

About the Mechanical Engineering Summer Internship Syska Hennessy Group, a leader in consulting, engineering, and commissioning services, is hiring a Mechanical Engineering Summer Intern in San Francisco. The team works on MEP, information and communication technology, architectural lighting, vertical transportation, and commissioning projects around the world. What to Expect Interns join a collaborative environment focused on learning and professional growth. The program includes support from experienced engineers, a diverse team, flexible schedules, and opportunities to connect at social events. Compensation is competitive. What You Will Do Work with engineers to prepare design documentation Create AutoCAD and Revit drawings for mechanical systems Assist with design calculations and help size mechanical systems for buildings Support engineers during field investigations and construction site visits Join educational lunch-and-learn sessions designed for interns

Apr 17, 2026
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companyMechanize logo
Full-time|On-site|San Francisco

At Mechanize, we specialize in developing reinforcement learning (RL) environments that empower AI models to execute real-world tasks efficiently. Our mission is to drive the complete automation of the economy, providing innovative solutions to leading AI laboratories. Discover more about our work at mechanize.work.As a Senior Software Engineer at Mechanize, you will contribute to the creation of RL environments that are pivotal in the field of AI model training. Ideal candidates will have 2-5 years of software engineering experience with proficiency in Python programming. Previous experience in machine learning or AI is not a prerequisite.For insights on our interview process, visit: Interview Process at Mechanize.

Feb 18, 2026
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companymechanize logo
Full-time|On-site|San Francisco

Join mechanize as a Senior Software Engineer, where you'll contribute to innovative software solutions that shape the future of technology. In this role, you will lead projects, mentor junior developers, and collaborate with cross-functional teams to deliver high-quality software products. Your expertise will drive architectural decisions and enhance our development processes.

Mar 12, 2026
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companymedraai logo
Full-time|On-site|San Francisco

About the Role:Join us for a paid internship in the summer of 2026 (June to August, dates are flexible). This role requires full-time, in-person attendance at our San Francisco office located in the vibrant Mission District.What We're Creating:We are developing the core components of our groundbreaking Physical AI Scientist platform, which includes: Advanced Physical AI capable of manipulating scientific instruments with human-like precision. Intelligent Scientific AI that autonomously analyzes results, determines next steps, and completes experiments.This is a highly ambitious endeavor, and we believe that a dedicated team of individuals who take ownership can achieve remarkable success.The Team:Our team is made up of passionate engineers from esteemed companies like Tesla, Amazon, SpaceX, and Neuralink. We thrive on collaboration and enjoy fast-paced work, whether it’s on our products or during team outings like skiing or go-karting!We love diving deep into discussions about engineering and robotics, as well as sharing interests in topics like race cars and cooking. Our culture encourages continuous learning and sharing knowledge among team members.We value straightforward communication and are not afraid of healthy debates regarding design choices. If disagreements arise, we prefer to address them quickly and with empathy.In this role, you will:Collaborate with our Full Stack Software Engineering team to develop software solutions that enhance scientific advancements.We're Looking For Candidates Who:Are adaptable and willing to take on diverse responsibilities.Can thrive in a dynamic environment where priorities may shift and timelines can be ambiguous.Have a genuine enthusiasm for learning and expanding their technical abilities.Preferred Qualifications:Proficient in Python, with the ability to swiftly implement and refine ideas.Experience in developing interactive front-end applications using React or similar frameworks.Familiarity with Typescript.Understanding of web programming (HTML, CSS, JS, HTTP, REST).Experience in backend system design and implementation.

Oct 28, 2025
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companyCloudflare, Inc. logo
Internship|On-site|In-Office

Join Cloudflare as a Research Engineer Intern for Summer 2026! This is a unique opportunity to contribute to cutting-edge projects and collaborate with talented engineers in a dynamic environment. You will gain hands-on experience in research and development while working directly with our engineering teams. This internship is designed for ambitious individuals looking to kickstart their careers in technology.

Feb 6, 2026
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companyCloudflare, Inc. logo
Internship|On-site|In-Office

Join Cloudflare as a Security Engineer Intern for the summer of 2026! This is an exciting opportunity for students looking to gain hands-on experience in cybersecurity. As part of our team, you will work alongside seasoned professionals on projects that help protect our clients' digital assets and infrastructure.In this role, you will engage in various tasks such as analyzing security vulnerabilities, assisting in the development of security protocols, and contributing to incident response efforts. Your work will play a crucial role in maintaining the security posture of our services.

Feb 6, 2026
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companyCloudflare, Inc. logo
Internship|On-site|In-Office

Join Cloudflare as a Marketing Operations Intern for the summer of 2026 and immerse yourself in the dynamic world of digital marketing. As an intern, you will collaborate with our marketing team, contributing to various initiatives that enhance brand visibility and drive customer engagement. This is a unique opportunity to gain hands-on experience in a fast-paced environment while working alongside seasoned professionals.

Mar 20, 2026
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companyPinterest, Inc. logo
Internship|Hybrid|San Francisco, CA, US; Palo Alto, CA, US; Seattle, WA, US; New York, NY, US

Pinterest’s Advanced Technology Group is looking for a Machine Learning Intern at the master’s level for Fall 2026. This internship centers on visual search and recommendation systems, blending research and engineering in a collaborative environment. Interns may help launch new features for millions of users or take part in academic research projects. Role overview This 12-week paid internship runs from September 21 to December 11, 2026. Work may be remote or hybrid, with office locations available in San Francisco, Palo Alto, Seattle, or New York. Team placement determines whether the role is remote or hybrid. What you will do Build and launch new user features using internal datasets and machine learning techniques. Conduct research focused on visual understanding and recommendation systems. Work closely with engineering teams and take part in external collaborations or mentoring. Contribute to features that may reach millions of users or support research for academic publication. Locations San Francisco, CA Palo Alto, CA Seattle, WA New York, NY Remote (team dependent) Internship details 12-week program: September 21 to December 11, 2026 Paid internship Remote or hybrid work (based on team) Application note Applying to this position enters candidates into consideration for multiple machine learning internship roles across Pinterest’s ML teams. Submit only one application within the USA or Canada; multiple applications may delay review.

Apr 22, 2026
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companyCloudflare, Inc. logo
Internship|On-site|In-Office

Join Cloudflare as a Solutions Engineer Intern during the Summer and Fall of 2026, where you will have the opportunity to work alongside skilled professionals in a dynamic environment. This internship offers a unique chance to engage in innovative projects, develop your technical skills, and contribute to cutting-edge solutions that enhance internet security and performance.

Apr 9, 2026

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