Senior Technical Architect

Senior Technical Architect | Commerce leader | UK Remote

We’re currently looking for a Senior Technical Architect to get involved in a major greenfield project with one of the UK's leading eCommerce organisations.

You will translate high-level solution designs into robust, scalable, secure low-level designs across multiple domains, whilst working closely with Solution Architects, Product Owners, UX, and engineering squads to ensure solutions meet functional and non-functional requirements, while championing architectural standards and driving best practice across the estate.

This is a hands‑on, highly collaborative role where you’ll influence delivery through strong technical leadership: shaping designs, guiding implementation, managing technical debt, and supporting incident resolution.

You’ll also play a key part in mentoring other architects and engineers, leading peer reviews, advising third parties and stakeholders, and supporting wider enterprise architecture initiatives including PoCs and strategic technical direction.

Key Responsibilities

• Produce and maintain Low‑Level Designs (LLDs) aligned to high‑level solution designs, UX wireframes, and evolving business needs
• Ensure designs meet architectural standards; support governance and Design Review processes where deviations are required
• Create and maintain low‑level application and integration diagrams in ArchiMate using enterprise tooling
• Publish and maintain API contracts in SwaggerHub and support the Developer Portal and API governance approach
• Drive design quality through peer review, standardisation, and consistent documentation across product areas
• Identify, manage, and reduce technical debt; support squads with backlog refinement and prioritisation
• Propose and lead refactoring initiatives and technical improvements across domains
• Support incident resolution, working with squads and following appropriate escalation routes
• Collaborate with Solution Architects in discovery, translating designs into actionable work items and helping shape NFRs
• Evaluate emerging technologies and lead proof‑of‑concept work to inform future direction
• Manage and optimise cloud and infrastructure costs within your domain, ensuring efficient, budget‑aligned resource usage
• Review third‑party architectural designs for alignment with internal standards and strategic goals; advise external teams and stakeholders
• Raise and communicate risks that could negatively impact the organisation and delivery outcomes
• Work with Data Architects to clarify requirements and enable delivery of data artefacts
• Mentor architects and engineers, oversee contracting architects, and support the wider Enterprise Architecture function
• Provide strong stakeholder management, responding to queries and ensuring pragmatic, "do the right thing" decision‑making
• Assist in evaluating technical options and trade‑offs to implement requirements effectively

Requirements

• Strong experience with AWS services, including serverless architectures
• Strong Java and Spring Boot expertise, with the ability to engage at code level where needed
• Experience using object‑oriented design patterns to build maintainable, scalable software solutions
• Ability to understand and read modern programming languages for investigation and technical due diligence
• Solid experience of API contract management (e.g., Swagger/OpenAPI) and supporting API governance
• Proven ability to operate across multiple technical domains, balancing delivery needs with architectural rigour
• Experience influencing, mentoring, and reviewing the work of other technical professionals (including third parties/contractors)
• Desirable: hands‑on AWS AI experience (e.g., leveraging AWS AI/ML services in real‑world solutions)

If you’re a technically strong architect who enjoys shaping low‑level design, driving engineering excellence, and guiding teams through complex, cloud‑first delivery, we’d love to hear from you.