> Markdown version of [/jobs/ext/3256984-software-engineer-ii](https://www.wearedevelopers.com/jobs/ext/3256984-software-engineer-ii). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer II - **Company:** Commerce.com Us, Inc. - **Location:** UK - **Experience:** Experienced - **Contract:** Permanent contract - **Skills:** PHP (Programming Language), Application Programming Interfaces (APIs), Software as a Service, Code Coverage, Continuous Integration, Software Debugging, Payment Gateway, Performance Tuning, Query Optimization, Ruby on Rails, BigCommerce, Prometheus, Software Engineering, Web Services, Datadog, System Availability, Grafana, Backend, Sentry, Domain Driven Design, Web Api - **Published:** September 5, 2026 - **Apply:** https://startup.jobs/software-engineer-ii-backend-ruby-commercecom-us-inc-8429707 ## About the Role * 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 continuous integration and designing, implementing and taking ownership of various tasks across the development cycle * Experienced in developing high-performance, scalable and available web services, and applications * Experience with PHP and Scala is preferred ## Description The Commerce Payment integrations team is responsible for building, operating, and continuously improving payment integrations on the BigCommerce 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 BigCommerce 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, Commerce, along with many other employers, has become the subject of fraudulent job offers to hopeful prospective job seekers. Be advised: Commerce does not offer jobs to individuals who do not go through our formal hiring process. Commerce will never: * require payment of recruitment fees from candidates; * request personally identifiable information through unsanctioned websites or applications; * attempt to solicit money from you as part of the hiring process or as part of an employment offer; * solicit money to complete visa requirements as part of a job offer. ## Related Videos - [APIs and Architecture for scaling omnichannel payments](https://www.wearedevelopers.com/videos/90-apis-and-architecture-for-scaling-omnichannel-payments) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Web APIs you might not know about](https://www.wearedevelopers.com/videos/281-web-apis-you-might-not-know-about) - [From Doubt to Confidence: How Sentry Uses Verdaccio to Bulletproof SDK Releases](https://www.wearedevelopers.com/videos/739-from-doubt-to-confidence-how-sentry-uses-verdaccio-to-bulletproof-sdk-releases) - [Modern Headless Commerce with Vendure](https://www.wearedevelopers.com/videos/489-modern-headless-commerce-with-vendure) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [The 7 Most Popular Backend Frameworks for Developers](https://www.wearedevelopers.com/magazine/403-the-7-most-popular-backend-frameworks-for-developers) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Best Countries for Software Engineers](https://www.wearedevelopers.com/magazine/267-best-countries-for-software-engineers) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market)