Product Software Engineer, Multiverse Computing

Fixed-Term Contract

Salary not provided

React

AWS

Docker

TypeScript

GCP

JavaScript

Python

C++

Rust

Azure

Cypress

Selenium

Spark

Flask

Jest

Next.js

Git

Unix

FastAPI

Junior and Mid level

Barcelona

More information about location

3+ days a week in office

Quantum software for complex challenges

Be an early applicant

Quantum software for complex challenges

101-200 employees

B2BArtificial IntelligenceDeep TechMachine LearningSaaS

Be an early applicant

Salary not provided

React

AWS

Docker

TypeScript

GCP

JavaScript

Python

C++

Rust

Azure

Cypress

Selenium

Spark

Flask

Jest

Next.js

Git

Unix

FastAPI

Junior and Mid level

Barcelona

More information about location

3+ days a week in office

101-200 employees

B2BArtificial IntelligenceDeep TechMachine LearningSaaS

Company mission

To bring quantum computing to society and use cases with great impact on society and on the technological wealth of the national and international territory.

Job

Company

Role

Who you are

Bachelor's degree or higher in Computer Science, a related technical field, or equivalent relevant industry experience
Hands-on experience in software engineering at junior to senior levels, with a versatile skill set where engineers wear many hats—though we especially seek expertise in frontend development (e.g., React, JavaScript/TypeScript), AI/ML and data science, backend API engineering, and QA. Focus on roles involving machine learning, data processing, and system deployment
Expert knowledge of Python and preferably other languages such as Rust, C/C++, and JavaScript/TypeScript
1+ years of experience in software engineering, particularly in developing and deploying software systems on the cloud (e.g., AWS, GCP, or Azure)
Proficiency with Git/GitHub/GitLab and CI/CD pipelines
Strong ability to work with APIs, design efficient application workflows, and integrate frontend-backend components
Demonstrated commitment to maintainable, high-quality code through best practices such as testing, documentation, clean design principles, and the ability to instill these in others
Familiarity with emerging technologies in AI/ML and their practical applications
Excellent communication and soft skills: a people’s person with the ability to collaborate with experts from diverse professional backgrounds, both in-person and through online resources
Strong organizational, problem-solving, and time-management skills with a keen eye for detail
Perfect command of English

Desirable

Experience in frontend and backend development, with varying levels of seniority
Proficiency in TypeScript, Python, Lit, and frameworks such as Flask or FastAPI
Hands-on experience with Web Components, Docker, Git, and CI/CD pipelines
Familiarity with Core Web Vitals, Lighthouse, DevTools, and Unix systems
Strong skills in debugging, testing, and performance optimization, including QA technologies with Python (e.g., pytest, Selenium) and JavaScript (e.g., Jest, Cypress) for E2E, integration, and unit testing
Nice to have: Experience with React, Next.js, server-side rendering (SSR), or static site generation (SSG)
Familiarity with developing on and with LLMs, including tools and frameworks such as HuggingFace Transformers, OpenAI APIs, vector databases, and model-serving platforms
Experience with distributed computing frameworks and concepts, such as Ray, Apache Spark, or distributed training/inference across GPUs and nodes
Hands-on experience in algorithm development and optimization, including designing scalable and robust class structures for frontend, backend, AI/ML, and QA applications
Proven track record of working with cross-functional teams, collaborating with diverse experts both in-person and remotely to deliver innovative solutions

What the job involves

Fixed-term contract ending in June 2026
Join a world-class team of Quantum and AI experts with an extensive track record in both academia and industry
Work with Fortune-500 customers from government and private sectors
Contribute to our groundbreaking compressing tool
Tackle high value open problems from industry
Take on technical leadership and work together with software and DevOps engineers as well as our machine learning and quantum experts to industrialize Multiverse’s core technologies

Application process

We are looking to fill this role immediately and are reviewing applications daily. Expect a fast, transparent process with quick feedback

Our take

Multiverse Computing is a company working on quantum and quantum-inspired computing solutions, addressing the limitations of traditional computing across finance, energy, manufacturing, and healthcare.

With its flagship products Singularity and CompactifAI, the company democratises quantum computing access, enabling professionals to leverage advanced algorithms for AI-driven optimisation and data compression without prior quantum expertise.

The company's had a successful 2025 too, first being named on the 2025 CB Insights' List of the 100 Most Innovative AI startups and then announcing a whopping $215M funding round. With this additional capital, the company is focused on strengthening CompactifAI, and further accelerating its name on a global scale.

Kirsty

Company Specialist at Welcome to the Jungle

Company

Funding (last 2 of 10 rounds)

Jun 2025

$222m

SERIES B

Mar 2025

$76.4m

GRANT

Total funding: $358.1m

Company HQ

Miramón-Zorroaga, Donostia-San Sebastian, Spain

Leadership

Enrique Lizaso Olmos

(Founder & CEO)

Founder of BlockTac and President of the 'Quantum for Quants' Commission at the Quantum World Association. Previously taught Statistical Methods for Engineering at the University of Vic - Central University of Catalonia.

Samuel Mugel

(CTO)

Mentor at the Creative Destruction Lab, and Scientific Advisor for the McKinsey Technology Council and Quantum World Association. Previously a Computational Physicist at Cortirio and a Technical Director at Quantum Ventures.

Alfonso Rubio-Manzanares

(CMO)

Partner and CEO at Entanglement Partners, as well as the General Manager at The Carrot Cake. They are also on multiple Advisory Boards, including greenYng, Ubiquat Technologies, and Ontek. Previously co-founded Ontek, Hubtype, and Cabier Institute.

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