At a Glance
- Tasks: Design and build backend services for seamless POS integrations across various platforms.
- Company: Join On, a company crafting innovative retail experiences.
- Benefits: Enjoy competitive pay, inclusive culture, and opportunities for growth.
- Other info: Be part of a dynamic team focused on innovation and collaboration.
- Why this job: Make a real impact in redefining retail technology and enhancing customer experiences.
- Qualifications: 3+ years in backend engineering with skills in Node.js, APIs, and cloud services.
The predicted salary is between 60000 - 80000 £ per year.
Your Mission
- Design, build, and scale backend services that power POS integrations across ERP, eCom, CRM, inventory, and loyalty platforms.
- Develop REST and GraphQL APIs that are performant, secure, and easy to consume.
- Implement real‑time and batch data sync, authentication flows (OAuth, SSO), and secure event pipelines.
- Contribute to the design of a cloud‑native, event‑driven architecture for global retail operations.
- Build scalable integration patterns using message queues (Kafka, RabbitMQ) and serverless workflows.
- Support observability through proactive monitoring, alerting, and performance tuning (e.g., NewRelic).
- Testing & Quality Automation: ensure reliability through a robust automated testing stack—contract tests, load tests, and test data pipelines.
- Collaborate with QA and DevOps to streamline CI/CD and improve release confidence.
- Participate in incident response and post‑mortem analysis to continuously harden platform stability.
- Partner with frontend, product, and vendor teams to align integration design with platform capabilities.
- Influence technical decisions during vendor evaluations and rollout phases.
- Impact roadmap decisions by sharing technical insights and platform implications.
- Actively contribute to the broader architecture vision for On’s composable commerce technology stack.
Your story
- 3+ years of backend engineering experience with modern technologies (Node.js, TypeScript, or similar).
- Proven track record integrating APIs across commerce, ERP, OMS, or CRM domains.
- Familiar with headless commerce, microservices, and composable architecture principles.
- Experience with message brokers (Kafka) and asynchronous data processing.
- Solid understanding of databases (e.g., PostgreSQL) and infrastructure‑as‑code tools (Terraform).
- Skilled in designing, scaling, and monitoring cloud‑native services (AWS, GCP, or Azure).
- Familiarity with OAuth2, token‑based authentication, and secure service design.
- Strong debugging and telemetry skills: logs, traces, metrics, and real‑time alerting.
About the Team
At On, we don’t just create tools—we craft experiences that move the world. As part of our Retail Experience team, you’ll help build the future of in‑store technology. Your code will connect people with performance, power a seamless omnichannel journey, and support a mission that’s bigger than any one screen: to ignite the human spirit through movement. Ready to help us redefine retail? Lace up. Let’s go.
On is an Equal Opportunity Employer. We are committed to creating a work environment that is fair and inclusive, where all decisions related to recruitment, advancement, and retention are free of discrimination.
Backend Engineer – POS Platforms Integration in London employer: ON.com
At On, we pride ourselves on being an exceptional employer that fosters a culture of innovation and collaboration. Our Retail Experience team is dedicated to building cutting-edge technology that enhances the customer journey, offering employees opportunities for professional growth and development in a supportive environment. With a commitment to inclusivity and a mission that inspires, working with us means being part of a dynamic team that is shaping the future of retail.
StudySmarter Expert Advice🤫
We think this is how you could land Backend Engineer – POS Platforms Integration in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at ON.com or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to ON.com.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like ON.com.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like ON.com that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Backend Engineer – POS Platforms Integration in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at ON.com.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at ON.com and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at ON.com
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If ON.com uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
