Full Stack Developer [dotNET + PHP] – Contractor

Scope (Purpose)

Conexus is seeking a contractor to enhance and maintain our applications in line with organizational priorities. The primary focus will be on updating the Nuclear Safety Culture Assessment Tool (NSCAT), including delivering 22 feature enhancements identified by the Task Team. Additional responsibilities include planning, developing, and implementing the Finance team’s requirements within the Business Management System (BMS). Key deliverables will include code implementation, unit and system testing, deployment to production, and training staff on updated application workflows. The contractor will also ensure effective knowledge transfer to the Conexus development team by March 31, 2026, through comprehensive documentation, instructional guides, and hands-on support.

Key Accountabilities

1. Work with our Principal Dev/Ops Engineer to complete assigned tasks on time.

2. Programming Development of custom NSCAT & BMS applications, including software issue resolution

3. Liaise with NSCAT task team & Research & Development Team to understand, implement, and test modifications to infrastructure & code.

General Responsibilities

- Apply appropriate Software Development Lifecycle (SDLC) methodologies (Agile, Waterfall, etc.) across all assigned projects.

- Use version control tools (Git, GitHub, GitLab) to manage code and enable collaborative development.

- Perform comprehensive testing (unit, integration, and system testing) and debugging to ensure high-quality solutions.

- Design, develop, and integrate RESTful APIs for interoperability and scalability.

- Create and optimize relational database models to maintain data accuracy and system performance.

- Apply secure coding practices in line with OWASP principles and organizational security requirements.

- Analyze technical issues, troubleshoot effectively, and implement scalable solutions.

- Contribute to cross-functional teamwork, demonstrating strong communication and collaboration skills.

- Develop and support applications using PHP, Laravel, Vue.JS, and MySQL.

- Build and maintain solutions using C#, .NET, Node.js, and MS SQL Server.

- Support project deliverables by preparing documentation, training relevant staff, and contributing to knowledge transfer activities.

Requirements

Education & Experience

- Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related field. Equivalent combination of education and hands-on experience may be considered.

- 5+ years of professional experience in full-stack software development, including both front-end and back-end application design and maintenance.

- Demonstrated experience with PHP, Laravel, Vue.js, and MySQL in production environments.

- Strong background in software development lifecycle (SDLC) methodologies, including Agile and Waterfall.

- Hands-on experience with version control systems (Git, GitHub, GitLab) in collaborative development settings.

- Proven track record of developing and integrating RESTful APIs and working with relational databases.

- Experience with system testing, debugging, and performance optimization.

- Familiarity with secure coding practices, OWASP principles, and regulatory requirements for data protection.

- Prior experience working in cross-functional teams, with excellent communication and collaboration skills.

- Experience in knowledge transfer, documentation, and end-user training is an asset.

Previous experience in utilities, energy, or nuclear sector environments is an asset but not required.

Competencies

Core Full-Stack Skills

- Strong understanding of Software Development Lifecycle (SDLC) methodologies, including Agile and Waterfall.

- Proficiency with version control systems (Git, GitHub, GitLab).

- Hands-on experience in unit, integration, and system testing, with solid debugging skills.

- Expertise in designing, developing, and integrating RESTful APIs.

- Skilled in relational database modeling, design, and implementation.

- Knowledge of secure coding practices, OWASP principles, and data protection standards.

- Strong analytical and problem-solving abilities with a focus on effective solutions.

- Excellent communication and collaboration skills, with the ability to work in cross-functional teams.

PHP/Laravel/Vue.js/MySQL Stack

- Proficient in PHP fundamentals, object-oriented programming, and common frameworks.

- Practical experience with Laravel, including routing, middleware, and Eloquent ORM.

- Solid understanding of Vue.js, component-based architecture, and data binding.

- Skilled in MySQL, including database design, query optimization, and data manipulation.

NET/C#/Node.js/MS SQL Stack

- Strong knowledge of C# and the .NET/.NET Core framework.

- Familiarity with Node.js fundamentals, JavaScript, and asynchronous programming.

- Proficiency in MS SQL Server, including database design, complex queries, and optimization.

Success Indicators/KPI’s

- Timely and efficient completion of software bug resolution for identified issues with custom applications.

- Timely and efficient completion of project commitments (on time, in scope, on budget).

- High system/software reliability contributing to efficient ongoing operation, including maintenance & feature improvements of custom-built web applications including (BMS, NSCAT)

- New tools implemented with open, honest communications with project teams to identify requirements, build proofs-of-concept for development environments & testing, and deployment into production, for new tools and feature improvements to existing ones.

- Acceptance and approvals of project scope and cost proposals

- Emerging technology/upgrades presented to the team because of staying current on the latest approaches.

- Delivery of reports and analysis related to security issues so that appropriate measures are taken, and risk minimized.

Work Environment

This role is based at the Conexus office in Toronto with the opportunity to work remotely 1-3 days per week.

Conexus employees are expected to consistently demonstrate our core values of Integrity, Collaboration, Innovation, Sustainability and Agility, specifically:

- Acting with respect, transparency and commitment in all relationships and decisions

- Fostering connection, trust and shared success by bringing the industry together across borders, disciplines, and perspectives

- Driving forward-thinking solutions and accelerating advancements that shape the future of nuclear energy

- Delivering exceptional results and value to advance a clean energy future that supports people, the planet, and progress.

- Adapting and evolving to meet challenges and realize opportunities in an ever-changing global landscape

Conexus prides itself on a strong workplace culture and values its team members

Conexus is recognized as a diversity champion in our sector, particularly for women in the engineering field, and as an equal-opportunity employer serving a global community. Conexus welcomes and encourages applications from all individuals. Accommodations are available on request for candidates taking part in the selection process.