Senior Full Stack Engineer, PsiQuantum
$172-205k
+ Equity
Quantum computer builder
Job no longer available
Quantum computer builder
201-500 employees
Job no longer available
$172-205k
+ Equity
201-500 employees
Company mission
To create the world’s first useful fault tolerant, error corrected quantum computer that will solve otherwise impossible problems.
Role
Who you are
- We are seeking an experienced Senior Full Stack Engineer with 7+ years of expertise in modern web development technologies, including professional experience with at least one of the following frameworks: , Vercel, or SvelteKit
- This role requires strong fluency in JavaScript and TypeScript, along with a solid understanding of HTML5, CSS3/4, and modern web design principles
- Familiarity with Git, terminal usage, and CI/CD pipelines is a plus, as you will contribute to maintaining a smooth development workflow
- If you are passionate about frontend development, love working with cutting-edge technology, and enjoy contributing to product development in a dynamic startup environment, we’d love to hear from you
- Degree in Computer Science or equivalent experience shipping products to production
- 7+ years of frontend development experience, particularly with React, Next.js, SvelteKit, and Vercel
- Strong fluency in JavaScript and TypeScript, with a deep understanding of HTML5, CSS3/4, and modern web design principles
- Fluency in Python would be an asset, but not a requirement
- Experience delivering modular, maintainable, and tested code in React, Next.js, or SvelteKit
- Solid understanding of unit and integration testing methodologies
- Strong knowledge of security best practices, particularly in authentication and authorization
- Experience working with both legacy and bespoke codebases and integrating with external vendors
- Understands and can implement common design patterns
- Proficiency with Git and terminal usage in a development environment
- Familiarity with CI/CD pipelines and automation for testing and deployment
- Proven ability to work in fast-paced startup environments
- Excellent communication and collaboration skills, working effectively with cross-functional teams
- A proactive problem solver with a focus on scalability and performance optimization
What the job involves
- You will work on building Single Page Applications (SPAs) with a focus on security best practices, such as authentication and authorization, while ensuring integration with legacy and bespoke codebases, as well as third-party vendors
- In this role, you will take ownership of frontend architecture and development, ensuring performance, scalability, and security
- You will also be responsible for writing modular, well-tested code, with a strong emphasis on unit and integration testing
- Collaboration is key in our startup culture, and you will work closely with cross-functional teams to design new features and optimize existing ones
- Architect, design, and build frontend applications using modern tooling, ensuring scalable, secure, and high-quality code
- Design, develop, and maintain frontend applications written in Sveltekit
- Ensure performance, scalability, and adherence to web design principles (HTML5, CSS3/4) across all frontend projects
- Write well-structured, maintainable, and thoroughly tested code in JavaScript and TypeScript
- Work with stakeholders to understand, plan and document work as needed (e.g., Jira, Asana, etc.)
- Implement security best practices with a focus on authentication, authorization, and data protection
- Collaborate with product teams in design sessions and contribute to feature development
- Work with both modern and legacy codebases, ensuring smooth integration with external vendors
- Lead efforts in unit and integration testing to maintain robust and reliable frontend code
- Utilize Git and terminal commands as part of day-to-day development workflow
- Contribute to the development and improvement of CI/CD pipelines for automated builds, testing, and deployment
- Mentor junior engineers, fostering best practices and driving continuous improvement
Our take
Quantum computing will change the world more than any other imminent technological development, and PsiQuantum sits at the forefront of the charge to build the first quantum computer that will actually work.
The company is unique for the scale of their ambitions. Rather than focusing on what they term “intermediate milestones” like building smaller proof of concept systems, PsiQuantum builds the first large-scale, error-corrected computer, using photonics to deliver over 1,000,000 qubits (current quantum machines have yet to cross the 1,000 qubit mark).
There are plenty of companies building quantum computers, including the likes of IBM, Google and Honeywell, but these prototypical machines lack the size to correct errors, making them exponentially less useful than what PsiQuantum aims for. While other companies operate in the same sphere, PsiQuantum is unequivocally a leader in its field, founded by world-class academics and raising hundreds of millions in funding to reach unicorn status.
Steph
Company Specialist at Welcome to the Jungle
Insights
16% employee growth in 12 months
Company
Funding (last 2 of 7 rounds)
Jun 2025
$750m
GROWTH EQUITY VC
Jun 2024
$125m
CONVERTIBLE
Total funding: $2.4bn
Company HQ
Palo Alto, CA
Leadership
Jeremy O'Brien
(CEO)Prior to founding PsiQuantum, researched and taught at universities across the world, including Bristol, Stanford, Osaka, Sydney and Queensland.
Mark Thompson
(Chief Technologist)Previously worked as an R&D Engineer at Toshiba and was a research fellow at the University of Cambridge. Is currently a Professor of Quantum Photonics at Bristol University as well as Chief Technologist at PsiQuantum.
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