Overview
Software Engineer (Product) — 9-month contract with bonus incentives. Location : Madrid, Barcelona. We are looking to fill this role immediately and are reviewing applications daily. Expect a fast, transparent process with quick feedback.
Why join us?
We are a European deep-tech leader in quantum and AI, backed by major global strategic investors and strong EU support. Our groundbreaking technology is already transforming how AI is deployed worldwide — compressing large language models by up to 95% without losing accuracy and cutting inference costs by 50–80%. Joining us means working on cutting-edge solutions that make AI faster, greener, and more accessible — and being part of a company often described as a “quantum-AI unicorn in the making.”
We offer
- Competitive annual salary
- Two unique bonuses : signing bonus at incorporation and retention bonus at contract completion
- Relocation package (if applicable)
- Up to 9-month contract, ending in June 2026
- Hybrid role and flexible working hours
- Be part of a fast-scaling Series B company at the forefront of deep tech
- Equal pay guaranteed
- International exposure in a multicultural, cutting-edge environment
Responsibilities
As a Software Engineer you will 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 collaborate with software and DevOps engineers as well as our machine learning and quantum experts to industrialize Multiverse’s core technologies.Required Qualifications
Bachelor\'s degree or higher in Computer Science, a related technical field, or equivalent relevant industry experience.Hands-on software engineering experience at junior to senior levels with a versatile skill set; focus on frontend development (e.g., React, JavaScript / TypeScript), AI / ML and data science, backend API engineering, and QA; experience with ML, 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.Commitment to maintainable, high-quality code through best practices such as testing, documentation, clean design, and the ability to instill these in others.Familiarity with emerging technologies in AI / ML and their practical applications.Excellent communication and soft skills : able to collaborate with experts from diverse professional backgrounds, both in-person and remotely.Strong organizational, problem-solving, and time-management skills with a keen eye for detail.Fluent in English.Preferred Qualifications
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) and JavaScript (e.g., Jest) for E2E, integration, and unit testing.Nice to have : Experience with React, Next.js, SSR or 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 (e.g., Ray, Apache Spark) and distributed training / inference across GPUs and nodes.Hands-on experience in algorithm development and optimization for frontend, backend, AI / ML, and QA applications.Proven track record of working with cross-functional teams to deliver innovative solutions.About Multiverse Computing
Founded in 2019, Multiverse Computing is a well-funded, fast-growing deep-tech company with 180+ employees worldwide. Recognized by CB Insights (2023 & 2025) as one of the Top 100 most promising AI companies globally, and the largest quantum software company in the EU.
Our flagship products address critical industry needs :
CompactifAI — compression tool for foundational AI models, reducing size by up to 95% while maintaining accuracy, enabling portability across devices from cloud to mobile and beyond.Singularity — a quantum and quantum-inspired optimization platform used by blue-chip companies in finance, energy, and manufacturing to solve complex challenges with immediate performance gains.You’ll be working alongside world-leading experts in quantum computing and AI, developing solutions that deliver real-world impact for global clients. We are committed to an inclusive, ethics-driven culture that values sustainability, diversity, and collaboration — a place where passionate people can grow and thrive. Come and join us!
As an equal opportunity employer, Multiverse Computing is committed to building an inclusive workplace. The company welcomes people from all different backgrounds, including age, citizenship, ethnic and racial origins, gender identities, individuals with disabilities, marital status, religions and ideologies, and sexual orientations to apply.
Additional
Department : Technical
Role : Software Engineer
Locations : Madrid, Barcelona
Employment type : Contract
Workplace type : Hybrid
Seniority level : Associate
#J-18808-Ljbffr
