Senior Ruby on Rails developer - Rest API, React.js

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.