Senior Software Developer (Full Stack Developer)

Credence; Chantilly; Sur place; EUR 50 000 - 70 000; Plein temps

Résumé du poste

A software development firm located in Chantilly, France, is seeking a Senior Software Developer with full stack development expertise. Ideal candidates will have over 5 years of experience, proficiency in both front-end and back-end technologies, and a solid portfolio of completed projects. The role emphasizes collaboration with UX/UI designers and product managers, as well as continuous improvement of development processes. Candidates with experience in modernizing legacy systems and secure coding will be preferred.

Qualifications

• 5+ years of experience in full stack development, demonstrating proficiency in both front-end and back-end technologies.
• Strong portfolio showcasing completed projects in modern and legacy environments.
• Experience with Agile development methodologies is a plus.

Responsabilités

• Design, develop, and maintain scalable and secure web applications.
• Collaborate with cross-functional teams to deliver high-quality software solutions.
• Conduct code reviews and ensure adherence to coding standards.

Connaissances

HTML/CSS/JavaScript

Blazor

React.js

Angular

C#

.NET Core/8

Java

Python

Node.js

RESTful APIs

SQL Server

MySQL

Oracle

NoSQL systems

Agile methodologies

Git

DevOps practices

Cloud platforms (AWS)

Formation

Bachelor’s degree in Computer Science or related field

Outils

CI/CD tools (Jenkins)

Automated testing tools

Containerization tools

Virtualization tools

Description du poste

Overview

Credence has immediate needs for multiple Senior Software Developers with full stack development expertise. The ideal candidates will have a strong background in both front‑end and back‑end technologies, with the ability to design, develop, and maintain complex applications. This role requires hands‑on coding, problem‑solving, and a deep understanding of modern development practices, including modernization of legacy systems and secure coding.

Key Responsibilities

Full Stack Development:
Design, develop, and maintain both front‑end and back‑end components of web applications, ensuring they are scalable, performant, and secure. Responsibilities include working with modern frameworks as well as upgrading and reverse‑engineering legacy applications.

Collaboration:
Work closely with cross‑functional teams including UX/UI designers, product managers, and other developers to deliver high‑quality software solutions. Engage with stakeholders to gather requirements and incorporate feedback into iterative improvements.

Code Reviews:
Participate in and contribute to code reviews, providing constructive feedback and ensuring adherence to coding standards and best practices.

Architecture & Design:
Contribute to architectural decisions, design patterns, system modernization strategies, and technology stack recommendations to meet business requirements.

Testing & Debugging:
Implement and utilize automated testing tools (including API testing frameworks) and debug complex issues across application layers to ensure high‑quality, stable code.

Continuous Improvement:
Stay updated with emerging technologies and development trends, continuously improving development processes and suggesting enhancements to ensure efficient delivery.

Documentation:
Create and maintain technical documentation for architecture, design, workflows, and code to support ongoing development and maintenance.

Technical Stacks

Front‑end & Back‑end Development:
Proficiency in front‑end technologies (HTML/CSS/JavaScript, Blazor, React.js or Angular) and back‑end development using C#, .NET Core/8, Java, Python, or Node.js. Experience modernizing legacy systems is a plus.

Infrastructure & Tools:
Experience with SQL-based and NoSQL databases, cloud platforms (AWS or equivalent), DevOps practices (CI/CD pipelines such as Jenkins), containerization, automated testing, version control (Git), and virtualization tools.

Qualifications

Education:
Bachelor’s degree in Computer Science or a related field.

Experience:
5+ years of experience in full stack development, with a strong portfolio of completed projects across modern and legacy environments.

Technical Skills

• Proficient in front‑end technologies such as HTML5, CSS3, JavaScript, and frameworks including Blazor, React.js, or Angular.
• Strong back‑end development skills in C#, .NET Core/8, Java, Python, or Node.js.
• Experience designing, developing, and maintaining RESTful APIs and microservices.
• Experience with database design and management using SQL Server, MySQL, Oracle, or NoSQL systems.
• Familiarity with cloud services (AWS) and deploying applications in cloud or hybrid environments.
• Knowledge of DevOps practices including CI/CD pipelines (such as Jenkins), containerization, and Git‑based workflows.
• Experience with automated testing tools for both UI and API layers.
• Experience troubleshooting and modernizing legacy codebases.

Preferred Qualifications

• Experience with Agile development methodologies.
• AWS Certified Solutions Architect or comparable cloud knowledge.
• Experience with microservices architecture, secure coding practices, and system modernization.
• Experience mentoring junior developers and participating in collaborative team environments.