Senior Software Engineer @ Square One Resources

Time zone : EMEA

We are a company operating in the biotechnology and medical field, developing solutions that directly support healthcare and life sciences. Our software stack has a long history and currently includes Java (1.6 / 1.8), JSP, Oracle Database, GWT, Swing, Stripes, and Tomcat. We are now embarking on a strategic transformation to modernize our systems, migrate parts of a large monolithic application, and evolve towards a more scalable, maintainable architecture. We are looking for an experienced Senior Software Engineer / Tech Lead who will help us shape the technical direction, lead modernization efforts, and mentor our team through this transition.

• 8+ years of professional software engineering experience with Java and enterprise systems.
• Proven experience leading or significantly contributing to modernization projects (e.g., monolith-to-modular / microservices, migration to cloud, refactoring legacy systems).
• Strong understanding of software architecture, design patterns, and system scalability.
• Experience with web technologies, APIs, and modern frameworks (Spring Boot, Angular / React, etc.).
• Solid knowledge of relational databases (Oracle experience is a strong plus).
• Familiarity with deployment environments (Tomcat, containers, CI / CD pipelines).
• Excellent communication skills and ability to collaborate with cross-functional teams.
• Strong problem-solving mindset and pragmatic approach to balancing technical and business priorities.
• Experience in biotech / medical / healthcare software is a plus (but not required).
• DevOps & Cloud : Experience with containerization (Docker, Kubernetes) is highly desirable.
• Problem Solving : Exceptional analytical and problem-solving skills, with the ability to tackle complex technical challenges and propose innovative solutions.
• Communication & Leadership : Excellent communication, presentation, and interpersonal skills.
• Ability to articulate complex technical concepts to diverse audiences and effectively lead technical discussions.

Time zone : EMEA

We are a company operating in the biotechnology and medical field, developing solutions that directly support healthcare and life sciences. Our software stack has a long history and currently includes Java (1.6 / 1.8), JSP, Oracle Database, GWT, Swing, Stripes, and Tomcat. We are now embarking on a strategic transformation to modernize our systems, migrate parts of a large monolithic application, and evolve towards a more scalable, maintainable architecture. We are looking for an experienced Senior Software Engineer / Tech Lead who will help us shape the technical direction, lead modernization efforts, and mentor our team through this transition.

,[Lead the design and execution of modernization initiatives, including : , Refactoring and extracting functionality from a large Java monolith., Migrating legacy applications (JSP, Swing, GWT, Stripes) to modern frameworks and architectures., Evaluating and introducing new technologies aligned with business needs., Define the long-term technical roadmap for system upgrades, modularization, and scalability., Work closely with stakeholders to understand business and regulatory requirements in the biotech / medical domain., Provide hands-on technical leadership : write high-quality code, review contributions, and ensure best practices., Mentor and support other engineers during the migration and modernization journey., Collaborate with database experts on Oracle optimization and potential migration strategies.] Requirements : Java, JSP, API, Oracle, GWT, Tomcat, Microservices, Cloud, Spring Boot, CI / CD Pipelines, DevOps, Docker, Kubernetes, Angular, React Tools : .