Senior FullStack Software Engineer- React & Ruby on Rails

Versapay; Toronto; Remote; CAD 140,000 - 160,000; Full time

Job summary

Join a leading company as a Senior Fullstack Software Engineer to work on impactful features within a modern tech stack. You will design, develop, and enhance B2B payment solutions while collaborating cross-functionally and mentoring junior engineers. Competitive compensation and a collaborative culture await you.

Benefits

Competitive compensation

Opportunities for career advancement

Benefits for employees

Qualifications

• 7+ years of experience in software engineering.
• Proven experience building fullstack SaaS applications.
• Strong understanding of algorithms and data structures.

Responsibilities

• Design, develop, and test fullstack product features.
• Collaborate with your squad to implement new features.
• Investigate and resolve performance and security issues.

Skills

React.js

Ruby on Rails

JavaScript

TypeScript

Algorithms

Data Structures

System Design

Debugging

Problem Solving

Communication

Education

Bachelor's in Computer Science, Engineering, or Mathematics

Job description

About Versapay

For growing businesses that need to accomplish more with less, Versapay’s Accounts Receivable Efficiency Suite simplifies the invoice-to-cash process by automating invoicing, facilitating B2B payments, and streamlining cash application with AI. Versapay integrates natively with top ERPs, while allowing businesses to collect with a self-serve payment portal and collaborate with customers and teammates to resolve what automation alone can’t. Owned by Great Hill Partners, Versapay’s employee base spans the U.S. and Canada with offices in Atlanta and Miami. With 10,000 customers and 5M+ companies transacting, Versapay facilitates 110M+ transactions and $170B+ in payments volume annually

Think you might be the next Veep to join? Read on!!

HOW YOU’LL MAKE A HUGE IMPACT HERE – AND ON YOUR CAREER

At Versapay, product development is organized around cross-functional squads -- each including Product Managers, Engineers, QA, and more—focused on delivering impactful features and scalable systems. We’re looking for aSenior Fullstack Software Engineerwho thrives in a collaborative environment and is passionate about building high-quality, modern software.

You’ll play a key role in designing and developing features across our platform, with a focus on both frontend (React) and backend (Ruby on Rails). You’ll also contribute to architectural decisions, mentor peers, and help us scale our systems as we grow.

Explore our stack here:https://stackshare.io/versapay/arc

What You'll Do:

• Design, develop, and test fullstack product features that meet business and technical requirements.
• Collaborate with your squad to plan, scope, and implement new features and enhancements.
• Estimate work methodically based on iterative learning and agile best practices.
• Investigate and resolve performance, scalability, security and data integrity issues.
• Participate in code reviews, architecture discussions, and technical decision-making.
• Work closely with Product, QA, DevOps, and Customer Care to deliver value to our users.
• Contribute to R&D efforts to ensure our platform is scalable, reliable, and secure.
• Mentor junior engineers and foster a culture of continuous learning and improvement.

What You'll Bring to the Team:

• 7+ years of experience in software engineering, with a strong foundation in computer science, engineering, or mathematics.
• Proven experience building and shipping fullstackSaaS applications in an agile, test-driven environment.
• Expertise inReact.jsand modern JavaScript/TypeScript development.
• Experience withRuby on Railsor a strong willingness and ability to learn it quickly.
• Solid understanding of algorithms, data structures, and system design.
• Strong debugging and problem-solving skills, especially in complex or ambiguous situations.
• Excellent communication skills—clear, concise, and effective in both written and verbal formats.
• A collaborative mindset with the ability to work independently and take ownership.
• Experience in the Payments industry and/or PCI/DSS compliance is a strong asset.

Why Join Us?:

• Work on a modern tech stack with a team that values innovation, quality, and collaboration.
• Be part of a growing company that’s transforming how businesses manage payments and receivables.
• Competitive compensation, benefits, and opportunities for career advancement.

$140,000 - $160,000 a year

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