Role: Senior Ruby on Rails developer - Rest API, React.js
Location: Toronto, ON (Hybrid – 4 Days/Week Onsite)
Duration: 6–12 Months (Contract)
Job Summary
We are looking for a Senior Software Engineer (Ruby on Rails) to join a high-performing engineering team building scalable, secure, and customer-focused applications. In this role, you'll contribute to product strategy, collaborate with cross-functional teams, and lead the design, development, deployment, and maintenance of critical software solutions.
This opportunity offers the agility and ownership of a startup environment with the stability and scale of one of Canada's leading financial institutions.
Key Responsibilities
Design, develop, test, deploy, and maintain high-quality Ruby on Rails applications.
Write clean, scalable, and well-tested code that aligns with business requirements and engineering best practices.
Lead the planning, architecture, implementation, and maintenance of key software components.
Build new features and enhance existing functionality based on product roadmap priorities.
Ensure application reliability, performance, and production stability.
Participate in code reviews, architectural discussions, sprint planning, and delivery meetings.
Collaborate closely with Product Owners, UX/UI designers, and engineering teams to deliver customer-centric solutions.
Track work progress using Jira and Agile/Kanban methodologies.
Mentor junior developers and contribute to engineering best practices.
Promote secure coding practices and ensure the protection of sensitive customer data.
Required Qualifications
Bachelor's degree in Computer Science, Engineering, or equivalent professional experience.
5+ years of professional experience in software development.
Strong expertise in Ruby on Rails development.
Required Technical Skills
Backend Development
Ruby on Rails
Sidekiq
Redis
RESTful API development
Object-Oriented Programming (OOP)
Databases
MySQL or PostgreSQL
Database design and optimization
Data structures and performance tuning
Front-End Development
React.js
JavaScript
jQuery
HTML5
CSS
Webpack
Testing & Quality
Unit Testing
Integration Testing
Test-driven development (preferred)
Code reviews and quality assurance
Agile Development
Jira
Agile / Scrum
Kanban
Continuous delivery practices
Required Soft Skills
Strong analytical and problem-solving abilities.
Excellent verbal and written communication skills.
Collaborative mindset with the ability to work across Product, Design, and Engineering teams.
Ability to quickly learn new business domains and technologies.
Passion for application security and secure software development practices.
Preferred Qualifications
Cloud & DevOps
Docker
Kubernetes
AWS
Terraform
GitHub
CircleCI
Monitoring & Observability
New Relic
Dynatrace
Splunk
Sumo Logic
Additional Experience
Rust programming language
OpenAPI Specification
ISO 27001 or SOC 2 compliance
Experience building and deploying cloud-native applications
Why Join?
Work on impactful products used by millions of customers.
Collaborate with talented engineers, designers, and product leaders.
Influence technical architecture and product direction.
Access modern development tools and cloud technologies.
Be part of an innovative engineering culture focused on continuous learning and collaboration.
Senior Ruby on Rails developer - Rest API, React.js • Toronto, ON, ca
Senior Software Engineer sought to design and maintain scalable cloud applications using Ruby on Rails and Ember. Voir plus
A financial technology company seeks a Senior Full Stack Developer (RoR) to enhance product reliability and reduce technical debt.This remote, full-time position within Canada offers a salary of up... Voir plus
Score is looking for a self-starting, strong developer who will be working in a collaborative environment using a variety of dynamic languages, tools, frameworks, etc.You will be a part of a brilli... Voir plus
Seeking a Senior Backend Engineer with Ruby/Rails and GraphQL experience to improve patient workflows and optimize software systems for a health tech company.Responsibilities include implementing b... Voir plus
Seeking a Senior Full Stack Developer with Ruby on Rails expertise for a fast-scaling fintech company.Responsibilities include building and refining features, collaborating with a team, and improvi... Voir plus
Ruby on Rails Developer (6 MONTHS CONTRACT).CURRENTLY LOOKING FOR 3 RoR DEVELOPERS - THE ROLE IS 100% REMOTE.THE CONTRACT IS FOR 6 MONTHS WITH A POSSIBILITY OF EXTENSION.You’ll work closely with ta... Voir plus
Score is looking for a self-starting, strong developer who will be working in a collaborative environment using a variety of dynamic languages, tools, frameworks, etc.You will be a part of a brilli... Voir plus
Senior Software Developer needed to work on a legal tech platform using Ruby on Rails. Voir plus
Senior Software Engineer (Ruby on Rails - Core Scribd) - (Remote - US/Canada).For one of our clients, we are looking for a.Senior Software Engineer (Ruby on Rails - Core Scribd).As a Senior Softwar... Voir plus
Overview(Job type: 100% remote from Alberta, British Columbia or Ontario in Canada, Full-time, Permanent)Gen II is a leading fund administration provider focused entirely on serving private capital... Voir plus
Seeking a Senior Full Stack Ruby on Rails Engineer to improve product reliability and reduce technical debt for a Canadian financial technology company.This remote, full-time role emphasizes strong... Voir plus
A financial wellness platform is seeking an Intermediate Developer with Ruby on Rails experience to join their remote team in Toronto.The role involves building and maintaining applications, solvin... Voir plus
Develop backend solutions for a payroll platform, collaborating with cross-functional teams, using Ruby on Rails. Voir plus
About ZiplineZipline is a well-funded, rapidly growing SaaS company transforming how frontline teams work.We empower the world’s leading brands across retail, healthcare, logistics, and beyond to c... Voir plus
A dynamic SaaS company is seeking a Senior Ruby on Rails Engineer to help scale its product and infrastructure.The ideal candidate will define and improve APIs, design robust features, and ensure t... Voir plus
Seeking a hands-on Ruby on Rails Team Lead in Calgary, Canada to lead a team in developing financial wellness products.Requires 4+ years of experience, team management skills, and Agile knowledge.O... Voir plus
Seeking a Senior Software Engineer to design, build, and maintain core Ruby on Rails systems, collaborate with cross-functional teams, and mentor junior developers for a growing foodservice technol... Voir plus
Elevate content management systems at Scribd, Inc.Senior Engineer focused on Ruby on Rails and Python.Engage in high-impact projects to improve metadata extraction and AI workflows.The Content Foun... Voir plus
You’ll work closely with cross-functional stakeholders to deliver elegant, performant, and maintainable applications using.This role is ideal for someone who possesses a high level of agency, a "do... Voir plus
Lead Developer role requiring expertise in React and Ruby on Rails, with responsibilities including software consulting, delivery, and client collaboration.The position emphasizes best practices, T... Voir plus
