Senior Rails & React Fullstack Engineer

Jonas Software Group; Toronto; On-site; CAD 135,000 - 140,000; Full time

Job summary

Jonas Software Group is seeking a Senior Fullstack Developer to join RewardOps in Toronto. Lead the core back-end SaaS app and integration engine, collaborating with Product, Architecture, Development, and QA to deliver scalable features.

You will drive end-to-end development, maintain code quality, and mentor junior engineers while aligning with modern web technologies and accessibility standards.

Qualifications

• Proven full-stack development with Rails/React.
• Experience building scalable SaaS backends and APIs.
• Strong collaboration with product, architecture, and QA teams.
• Excellent problem-solving and communication skills.

Responsibilities

• Leadership & Collaboration: Report to Head of Engineering and collaborate with Delivery Managers, Product Managers, Partnerships, Architects, Designers, Developers and QAs to understand requirements and objectives.
• Planning: Determine feasibility, timelines, approaches and risks with Delivery Managers, Product Managers and Architects.
• Feature Development: Implement and optimize end-to-end features, including API endpoints, background jobs, integrations and accessible front-end interfaces.
• Code & Quality Assurance: Maintain high standards of code quality through unit testing and code reviews.
• Technical Planning: Evaluate feasibility and RoI of proposed features and participate in sprint planning.
• Documentation & Integration: Create technical docs and integrate features with React frontend and third-party services.
• Performance & Troubleshooting: Improve platform performance and resolve root issues.
• Mentorship: Mentor junior developers and guide the team.
• Continuous Improvement: Stay current with industry trends to improve development process.

Skills

Ruby on Rails

React

RESTful APIs

SQL queries

HTML/CSS/JS

Team leadership

Tools

Git

AWS

Docker

Kubernetes

CI/CD

Job description

Jonas Software Group is seeking a Senior Fullstack Developer to join RewardOps in Toronto. Lead the core back-end SaaS app and integration engine, collaborating with Product, Architecture, Development, and QA to deliver scalable features.

You will drive end-to-end development, maintain code quality, and mentor junior engineers while aligning with modern web technologies and accessibility standards.