Senior Developer – BigCommerce

Job Description:

• Bachelor’s degree in computer science, Information Technology, or a related field (or equivalent practical experience).
• 7+ years of professional experience in e-commerce development, with 4+ years of hands-on experience in BigCommerce.
• Proven expertise in BigCommerce theme and app development, including Stencil, BigCommerce CLI, and custom storefronts.
• Strong proficiency in React, Laravel, PHP, JavaScript (ES6+), HTML5, and CSS3.
• Experience with BigCommerce Multi-Storefront, B2B Edition, and Headless Commerce implementations.
• Solid understanding of REST/GraphQL APIs, ERP/CRM integrations, and microservices architecture.
• Familiarity with CI/CD pipelines, Git, and modern development workflows.
• Experience using AI-assisted development tools (e.g., GitHub Copilot, ChatGPT) and automated testing frameworks.
• Demonstrated ability to mentor developers, conduct code reviews, and uphold technical standards.
• Excellent communication and collaboration skills across cross-functional teams.
• Strong problem-solving mindset with a focus on performance, scalability, and user experience.
• Lead the development and customisation of BigCommerce storefronts, themes, and apps across multiple client projects.
• Architect and implement scalable solutions that integrate seamlessly with ERP systems, third-party apps, and custom APIs.
• Collaborate closely with designers, project managers, and QA teams to deliver pixel-perfect, high-performing ecommerce experiences.
• Optimise site speed, SEO, and conversion funnels to maximise client ROI and user engagement.
• Stay ahead of platform updates, emerging technologies, and best practices to continuously elevate Kensium’s BigCommerce capabilities.
• Highly proficient in BigCommerce Stencil, JavaScript, HTML/CSS, and modern frontend frameworks.
• Experienced in building and scaling BigCommerce B2B and Multi-Storefront solutions, with a strong understanding of ecommerce architecture.
• A problem-solver who can translate business requirements into technical solutions that are robust and scalable.
• Comfortable working in cross-functional teams and mentoring junior developers.
• Passionate about ecommerce, user experience, and delivering measurable impact for clients.

Core competencies:

• Lead the design, development, and deployment of e-commerce solutions on BigCommerce and custom stacks (React, Laravel).
• Review and refine technical requirements, ensuring alignment with client goals and Kensium’s architectural standards.
• Develop and integrate scalable APIs with ERP, CRM, payment gateways, and third-party systems.
• Set and enforce coding standards (PSR-12 and beyond) across projects to ensure maintainability and performance.
• Conduct peer reviews and mentor junior developers, fostering technical excellence and growth.
• Collaborate cross-functionally with UI/UX, QA, Product, and DevOps teams to ensure seamless delivery and quality.
• Optimize storefronts for performance, accessibility, and SEO using modern frameworks and best practices.
• Leverage AI-assisted development tools (e.g., GitHub Copilot, ChatGPT) to enhance efficiency and accuracy.
• Identify modernization opportunities, driving innovation in workflows, frameworks, and integrations.
• Stay current with emerging technologies, BigCommerce platform updates, and ecommerce trends.
• Ensure deliverables meet testing standards, collaborating with QA to align on automation, regression, and performance testing strategies.
• Support pre-sales and solutioning efforts, providing technical insights and feasibility assessments for new opportunities.

Level skills:

Technical Expertise:

• 7+ years of professional experience in ecommerce development, with 4+ years of hands-on experience in BigCommerce.
• Strong proficiency in Stencil theme development, custom app creation, and BigCommerce APIs.
• Proven experience building custom applications using React (frontend) and Laravel (backend).
• Deep understanding of REST/GraphQL APIs, microservices architecture, and ERP/CRM integrations.
• Skilled in PHP, MySQL, JavaScript (ES6+), HTML5, CSS3, and modern frontend/backend frameworks.
• Familiar with Git, Composer, BigCommerce CLI, and CI/CD pipelines.

Shopify Expertise:

• Strong experience with BigCommerce Stencil framework, including theme customization and performance optimization.
• Proficient in BigCommerce API integrations (Storefront API, Admin API, Checkout SDK).
• Experience with Headless Commerce setups using BigCommerce as a backend with custom React frontends.
• Familiarity with BigCommerce Multi-Storefront, B2B Edition, and custom checkout flows.
• Experience integrating BigCommerce with ERP, CRM, payment, and fulfillment systems.
• Knowledge of SEO, accessibility, and performance tuning for BigCommerce storefronts.

Innovation & AI-Driven Development:

• Experience using AI-assisted tools like GitHub Copilot / Cursor for code generation, validation, and optimization.
• Knowledge of automated testing frameworks and code quality tools (e.g., PHPStan, PHPUnit, ESLint).
• Proactive in leveraging automation and AI to improve development speed, maintainability, and reliability.

Collaboration & Leadership:

• Excellent communicator with the ability to collaborate effectively across UI/UX, QA, Product, and client-facing teams.
• Skilled in mentoring developers, conducting code reviews, and upholding technical standards.
• Strong problem-solving, debugging, and performance optimization mindset.

Personal Attributes:

• Self-motivated, proactive, and accountable for delivery excellence.
• Passionate about innovation, continuous learning, and staying ahead of ecommerce trends.
• Detail-oriented with a strong sense of ownership and quality focus.
• Solutions-focused under pressure — realistic yet optimistic.
• Confident communicator who thrives in collaborative, fast-paced environments.