Software Engineer II - Backend; Ruby

Position: Software Engineer II - Backend (Ruby)
Location: Greater London

## Software Engineer II - Backend (Ruby/PHP/Scala)
Apply remote type:
Hybrid locations:
London, United Kingdom time type:
Full time posted on:
Posted 2 Days Agojob requisition :
JR102659#
** Welcome to the Agentic Commerce Era**## At Commerce, our mission is to empower businesses to innovate, grow, and thrive with our open, AI-driven commerce ecosystem. As the parent company of Big Commerce, Feedonomics, and Makeswift, we connect the tools and systems that power growth, enabling businesses to unlock the full potential of their data, deliver seamless and personalized experiences across every channel, and adapt swiftly to an ever-changing market.

We believe in harnessing AI responsibly to unlock new possibilities, and we’re looking for individuals who use it intentionally to solve problems, accelerate outcomes, and expand what’s possible in their role. Our purpose is to help businesses confidently solve complex commerce challenges so they can build smarter, adapt faster, and grow on their own terms. If you want to be part of a team of bold builders, sharp thinkers, and technical trailblazers who shape the future of commerce, this is the place for you.

The Commerce Payment integrations team is looking for a Software Engineer who wants to make an impact at every level of society by powering innovators, creative thinkers, entrepreneurs, and business owners around the world to be successful at every stage of their growth.

The Commerce Payment integrations team is responsible for building, operating, and continuously improving payment integrations on the Big Commerce platform - one of the most business-critical and revenue-sensitive areas of the product.

Our team builds payment gateway integrations that help merchants securely process payments and support scalable, high-performance, and flexible checkout experiences.
** What The Team Owns
*** Designs and maintains payment integrations functionality and APIs, including cart-to-order flows and payments processing
* Ensures high availability, performance, and correctness for checkout and payments related services, given their direct impact on merchant revenue
* Partners closely with Product to evolve checkout and payments capabilities while balancing quality, security (PCI), and speed of delivery
* Owns incident management and on-call responsibilities for checkout services due to their critical nature

The Commerce Engineering organisation is on a mission to build the leading SaaS eCommerce platform. We work closely with engineering teams across multiple domains, product managers, designers, business stakeholders, and external partners to build a platform where we can easily and securely deliver new and alternative user experiences. Our team brings together people with varied experience and strengths, and we iterate, learn, and build great software together.
** What You'll Do
*** Design, implement, and maintain features in a Ruby on Rails service for the payments offering on the Big Commerce platform
* Ensure functionality is production-grade, with the appropriate test coverage on all layers, instrumentation in place, and documentation
* Troubleshoot production issues and contribute to post-incident reviews to improve reliability
* Produce bullet-proof code that is robust, efficient, and maintainable
* Work on challenging problems such as query optimization and performance optimization while adhering to security protocols
* Work closely with operations and infrastructure to improve the architecture while building and scaling back-end services
* Engage in technical discussion of new solutions and architectures
* Build beautiful, scalable products using modern tools
* Collaborate with our product and design teams to define feature specifications and timelines
* Build new features with a focus on testability and extensibility
* Engage in technical discussion of new solutions and architectures
* Mentor other engineers in the current domain
* Review other engineer’s code to maintain and improve quality and security
* Support an open, positive, and energized culture
* Encourage innovation and foster an environment of continuous improvement
* Ensure that technical decisions support our goals of quality, performance, scalability, reliability, availability, and security
** Who You Are
*** 3+ years of professional backend development experience, with a strong focus on Ruby on Rails
* Solid understanding of building and operating production-grade systems (e.g. you know your way around logs, traces, metrics, feature flags, and can debug live traffic issues)
* Familiarity with observability tooling (e.g. Prometheus, Grafana, Sentry and Lightstep)
* A good understanding of Domain Driven Design
* experience integrating with third-party APIs and services, particularly those with nuanced state transitions (like payment flows).

* Education:

Preferred Minimum Bachelor's degree in CS, EE, SW, CE, MIS; or equivalent experience or completed either a comprehensive software engineering boot camp
* Experience with principles of…