At a Glance
- Tasks: Build resilient financial infrastructure and high-throughput core APIs for e-commerce.
- Company: Join a rapidly growing e-commerce ecosystem with innovative projects.
- Benefits: Competitive hourly rate, flexible part-time hours, and potential for ongoing work.
- Other info: Dynamic role with opportunities for career growth and skill development.
- Why this job: Make a real impact by designing secure payment systems and optimising APIs.
- Qualifications: Expertise in Node.js or PHP, with experience in secure payment integrations.
We are expanding the core capabilities of our rapidly growing e-commerce ecosystem and are looking for a highly skilled Backend Developer. This is an hourly contract focused on building out resilient financial infrastructure, localized transactional logic, and high-throughput core APIs.
The ideal candidate brings deep architectural expertise in handling sensitive transactional data, integrating complex third-party APIs, and designing modular, secure backend components. This role requires an engineer who can work autonomously, provide precise hourly tracking against clear milestones, and deliver production-ready, highly secure code.
Scope of Work
- Multi-Gateway Payment Orchestration: Design and implement a fault-tolerant payment routing system integrating multiple gateways (e.g., Stripe, PayPal, Adyen). The architecture must handle automatic failovers, split-payments, and strict ledger logging for financial auditing.
- Dynamic Localization & Tax Engine: Build a reliable server-side module for real-time currency conversion and seamless integration with automated tax calculation APIs (such as TaxJar or Avalara) to handle multi-regional compliance.
- Granular RBAC & Authentication: Deploy a highly secure OAuth2/OIDC authentication layer paired with robust Role-Based Access Control (RBAC) to safely manage access across administrative staff, vendors, and customers.
- API Modernization & Refactoring: Optimize and refactor existing monolithic endpoints into highly performant, well-documented RESTful or GraphQL APIs, ensuring minimal latency and clean separation of concerns.
Tech Stack & Requirements
- Strong proficiency in Node.js (NestJS/Express) or PHP (Laravel).
- Proven track record of implementing secure payment integrations and handling webhooks idempotently.
- Advanced knowledge of relational databases (PostgreSQL/MySQL) alongside data isolation and encryption best practices.
- Experience with distributed systems, microservices architecture, and utilizing Redis for session management and distributed locking.
- Ability to provide clear technical documentation and comprehensive integration test coverage.
Project Budget & Timeline
- Payment Type: Hourly
- Hourly Rate: $45 - $65 / hour (Dependent on depth of expertise)
- Project Scale: Estimated 40-50 hours total allocation
- Duration: 3-4 weeks with potential for ongoing architecture maintenance
Backend Developer: E-Commerce Core API & Payment Orchestration in London employer: Hubstaff
Join a forward-thinking e-commerce company that values innovation and expertise, offering a dynamic work environment where your skills as a Backend Developer will directly contribute to building resilient financial infrastructure. With a focus on employee growth, we provide opportunities for continuous learning and development, alongside competitive hourly rates and the flexibility of part-time work. Our collaborative culture encourages autonomy and creativity, making it an ideal place for those looking to make a meaningful impact in the rapidly evolving e-commerce landscape.
StudySmarter Expert Advice🤫
We think this is how you could land Backend Developer: E-Commerce Core API & Payment Orchestration in London
✨Showcase Your Online Presence
Make sure your portfolio shines! Create a website or use platforms like Behance or Dribbble to showcase your e-commerce projects. This way, when clients like Hubstaff check out your work, they can see your style and skills in action.
✨Get Involved in E-commerce Communities
Dive into e-commerce forums, Facebook groups, and LinkedIn networks focused on the field. Share your knowledge, ask questions, and connect with other freelancers and potential clients. This is where opportunities often pop up, especially for platforms like Shopify or WooCommerce.
✨Leverage Seasonal Trends
E-commerce is heavily influenced by seasonal trends, so time your outreach right! Be proactive around peak shopping seasons (like Black Friday or Christmas) and pitch your services to brands that are ramping up their online presence.
✨Pitch Directly to Brands You Admire
Identify brands you love that could use a fresh touch and send them a personalised pitch. Point out how your skills can elevate their e-commerce game. Don’t forget to mention that you’d love to work with them – it shows you're genuinely interested!
We think you need these skills to ace Backend Developer: E-Commerce Core API & Payment Orchestration in London
Some tips for your application 🫡
Show Off Your Freelance Skills:Since you're going for a freelance role in e-commerce, it's vital to highlight your experience with specific platforms like Shopify or WooCommerce. Make sure you list relevant past projects that showcase your ability to manage online stores and understand customer behaviour.
Portfolio Time!:A strong portfolio is essential when applying for freelance work. Include case studies or examples of successful e-commerce campaigns you've run. If you've got data to back up your achievements—like increases in sales or traffic—definitely share that!
Rates and Availability Matter:Freelance roles often require clarity about your rates and availability. Be upfront about what you charge and when you can start working. This helps set clear expectations right from the beginning, which we love to see!
Tailor Your Proposals:When applying to Hubstaff for the Backend Developer: E-Commerce Core API & Payment Orchestration position, make sure you tailor your application to their specific needs. Research their online presence and mention how you can help enhance it through your skills. A personal touch goes a long way in the e-commerce world!
How to prepare for a job interview at Hubstaff
✨Showcase Your E-commerce Savvy
Make sure to highlight your knowledge of e-commerce platforms like Shopify or WooCommerce. If you’ve worked with any tools for SEO or digital marketing, be ready to discuss specific strategies you've implemented – this shows you're not just familiar with the field but actively engaged with the latest trends.
✨Pitch Your Portfolio Like a Pro
As a freelancer, your portfolio is your golden ticket! Prepare to present your best work, highlighting projects that demonstrate your ability to drive sales or improve user experience. Be ready to explain your thought process behind each project and the measurable results you achieved.
✨Clarify Your Rates Early On
Don’t shy away from discussing your rates during the interview. Be clear about what you offer within your budget range, and if possible, back it up with examples of previous projects that justify those rates. This not only gives you credibility but also sets clear expectations from the get-go.
✨Familiarise Yourself with Data Analytics
E-commerce thrives on data, so brush up on your analytics skills! Be prepared to talk about how you’ve used tools like Google Analytics or A/B testing to optimise performance. Understanding metrics that matter will give you an edge and show your potential client that you can contribute strategically.
