COSIUM

www.cosium.com

3 Jobs

65 Employees

About the Company

Cosium develops cloud-based software solutions and devices for the healthcare industry. In the few years since its inception in 2003, Cosium has acquired a dominant position as an influencer in software and hardware for customer-facing applications, e.a. optical stores and audition centers, as well as helping to manage from behind the scenes with our Business Intelligence tools and innovative use of leading-edge technologies.

Cosium is more than software: we offer a complete ICT outsourcing service, able to support customers from large to small, even distributed in different countries; we offer services to the industry, from 3D representation and applications to custom-designed electronics for optical retail and domiciliary care.

Our international team based in Versailles is rapidly expanding to be able to offer our powerful and innovative solutions to more locales, for the benefit of healthcare professionals.

Cosium is also an important Open-Source software contributor. The company authored code for many projects including Chromium, Hibernate, Apache Maven, Jenkins, Keycloak and Spring. Take a look at https://github.com/cosium to follow Cosium OSS activity.

Listed Jobs

Company Name: COSIUM
Job Title: SENIOR STAFF SOFTWARE ENGINEER (H/F) - +80K€
Job Description: Job Title Senior Staff Software Engineer Role Summary Lead the development of cutting‑edge medical software systems, ensuring high‑quality code across the full stack. Mentor junior engineers, contribute to open‑source initiatives, and represent the company at industry conferences. Expectations * Minimum 5 years professional experience with Java or another JVM language. * Master’s degree in Software Engineering, Computer Science, or equivalent industry experience. * Strong foundation in SQL and experience with relational databases. * Proven ability to work on both backend and frontend components (full‑stack). * Professional proficiency in English. Key Responsibilities * Design, implement, and maintain scalable medical software solutions using the latest open‑source technologies. * Write clean, test‑driven code and enforce coding standards across the team. * Mentor and coach less‑experienced software engineers, facilitating their technical growth. * Actively contribute to and maintain Cosium’s open‑source projects hosted on GitHub. * Present findings and best practices at developer conferences and internal knowledge‑sharing sessions. Required Skills * Java (≥ Java 17) and JVM ecosystem. * Front‑end technologies: TypeScript (≥ 4.8), JavaScript, Angular 15. * Backend frameworks: Spring Boot 3, JPA, Hibernate 6. * Build & CI tools: Maven, Git, JUnit 5. * Application server: Tomcat. * Database: PostgreSQL. * IDE: IntelliJ IDEA. * Operating system: Unix/Linux environment. * Strong SQL design and query optimization. * Excellent communication and mentoring capabilities. Required Education & Certifications * Master’s degree in Software Engineering, Computer Science, or a related discipline, or equivalent professional experience.

Île-de-france, France

On site

Senior

12-03-2026

Company Name: COSIUM
Job Title: SENIOR SOFTWARE ENGINEER/STAFF SOFTWARE (H/F) - 50K€-65K€+
Job Description: Job title: Senior Software Engineer / Staff Software Engineer Role Summary: Design, develop, and maintain high‑quality medical SaaS software on a private cloud. Deliver both backend and frontend components, mentor junior engineers, and contribute to open‑source projects. Expectations: - Minimum 5 years of professional experience in JVM‑based development (Java or equivalent). - Master’s degree in Computer Science or a directly related field, or equivalent experience. - Proficient in English at a professional level. - Comfortable with full‑stack responsibilities, code quality, and technical mentorship. Key Responsibilities: - Architect, develop, test, and deploy scalable backend services using Java 17, Spring Boot 3, JPA/Hibernate 6, and PostgreSQL. - Build and maintain responsive front‑end interfaces with TypeScript 4.8, JavaScript, and Angular 15. - Write clean, maintainable code, perform code reviews, and enforce coding standards. - Mentor junior and mid‑level engineers, providing guidance on best practices and career growth. - Contribute to and maintain open‑source components hosted on the company’s GitHub repositories. - Participate in developer conferences and represent the engineering organization when speaking or attending events. - Collaborate cross‑functionally with product, QA, and DevOps to ensure timely delivery of features. - Optimize SQL queries, database schemas, and ensure high performance and reliability. Required Skills: - Java (17+), Spring Boot (3), JPA/Hibernate (6), PostgreSQL, SQL. - TypeScript, JavaScript, Angular (15), Front‑end web standards. - Build tools: Maven, Git. - Testing: JUnit 5. - Operating systems: Unix/Linux (strong preference). - IDE: IntelliJ IDEA. - Experience with cloud‑based SaaS architectures and microservices. - Excellent analytical, debugging, and communication skills. Required Education & Certifications: - Master’s degree in Computer Science, Software Engineering, or related discipline; alternatively, an equivalent professional experience record. - Professional certifications (e.g., Oracle Java SE, Spring Professional) are a plus.

Île-de-france, France

On site

Senior

13-03-2026

Company Name: COSIUM
Job Title: SENIOR SOFTWARE ENGINEER (H/F) - 50K€+
Job Description: **Job Title** Senior Software Engineer **Role Summary** Design, develop, and maintain high‑performance medical software solutions on cloud‑based SaaS platforms. Lead coding quality, mentor junior engineers, and contribute to open‑source projects while staying current with advanced open‑source technologies. **Expectations** - Master’s degree in software engineering or equivalent professional experience. - Minimum 5 years of professional experience with Java or other JVM languages. - Strong command of SQL fundamentals. - Full‑stack capability (backend & frontend). - Professional proficiency in English. **Key Responsibilities** 1. Engineer and deliver cutting‑edge medical systems on cloud infrastructure. 2. Write maintainable, high‑quality code that meets internal standards. 3. Leverage advanced open‑source stacks (Java 17, Typescript 4.8, Angular 15, Spring Boot 3, JPA, Hibernate 6). 4. Mentor and coach less‑experienced software developers. 5. Contribute to and maintain open‑source projects hosted on GitHub. 6. Represent the company at technical conferences and, where appropriate, speak as a presenter. **Required Skills** - Proficient in Java (JVM), SQL, and full‑stack development. - Experience with Git, Maven, JUnit 5, Tomcat, PostgreSQL, IntelliJ, and Unix/Linux. - Ability to write clean, well‑tested code and perform code reviews. - Strong communication and teamwork skills. - Self‑motivated and capable of working independently with minimal supervision. **Required Education & Certifications** - Master’s degree in Software Engineering or equivalent. - Certified professional experience as listed above (no specific external certifications required).