Développeur Sénior / Lead Developer .Net - H/F

About Us NPX partners with nuclear utilities and new reactor projects to unlock performance through innovation. We combine decades of nuclear operation expertise with AI, digital tools, and lean processes to help plants run safer, smarter, and more cost-effectively. Our Digital Transformation team scales this expertise through both NPX-developed and industry-leading products, delivering solutions to clients across Canada, the U.As a Senior .NET Developer at NPX you will own the design and evolution of mission-critical software systems that power digital transformation across the nuclear industry. You will operate at the intersection of application architecture, cloud infrastructure, and operational excellence, building scalable, resilient systems designed to perform in high-stakes environments. Partnering closely with product leaders, nuclear domain experts, and fellow developers, you will translate complex operational challenges into robust technical solutions. From distributed backend services to cloud-native deployments and CI/CD pipelines, you’ll think beyond individual components and design with the full system in mind.
You’ll lead architectural decisions, influence developer standards, and take accountability for solutions from concept through production. Success in this role means delivering software that is reliable, maintainable, and built to scale, while continuously raising the technical bar for the team.
Work Location Requirement: This role requires on-site presence in Chalk River, one day per week at most for deployments into production.

Security Clearance: Please note that this role requires Level 2 security clearance. Own the architecture and technical direction of critical .NET systems across application and infrastructure layers.

• Design and deliver cloud-native, distributed applications that power mission-critical nuclear industry workflows.
• Lead complex initiatives spanning application code, data layers, CI/CD pipelines, and deployment environments.
• Partner with product and leadership to translate business objectives into scalable technical strategy.
• Proactively identify and eliminate systemic bottlenecks across code, pipelines, and environments.
• Shape our technical roadmap across platform, reliability, and performance domains.

✨ Full-System Ownership: You think beyond features - you consider infrastructure, reliability, and long-term maintainability.

• Cloud & DevOps Fluency: You’re comfortable with CI/CD, containerization, cloud services, and production operations.
• Technical Leadership: You influence architecture and raise engineering standards across teams.
• Body: Health coverage, a spending account, and the freedom to rest and recharge.
• That means competitive pay and recognition for the impact you make.

NPX provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, genetics, sexual orientation, gender identity, or gender expression. Just a heads up that we use AI to help in the filtering of candidates based on job-specific criteria.