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# Solution Architect Ecommerce

- **Company:** FDM Group
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £70,000.0 - £100,000.0
- **Contract:** Temporary to permanent
- **Skills:** Application Programming Interfaces (APIs), Data Mapping, Data Streaming, Low Latency
- **Published:** October 9, 2026
- **Apply:** https://www.reed.co.uk/jobs/solution-architect-ecommerce/57437516

## About the Role

* Proven track record as a Solution Architect on large transformation programmes with many moving parts and interdependencies
 * Retail experience, with ecommerce experience a strong advantage
 * Experience designing headless, modular or API-led architectures, and moving away from a monolithic platform
 * Able to produce sequence diagrams, interface definitions and API designs at solution level, without needing to write the code
 * Strong grasp of non-functional design, including security, scalability, resilience and latency
 * Experience with data mapping and data flows across multiple systems
 * Comfortable working alongside engineers who build and maintain the platform themselves, and influencing lead engineers
 * Able to talk through a case study of a comparable transformation, including the problems faced and how they were resolved
 * Self-starter who can hit the ground running with minimal onboarding
 * Able to attend the London office one to two days a week
 * Minimum of 8 years' experience in solution architecture, including large-scale retail or ecommerce transformation

## Description

FDM is a global business and technology consultancy seeking a Solution Architect to work for our client within the Retail sector. This is initially a 12-month contract with the potential to extend and will be a hybrid role that will be based in London., Our client is seeking an experienced Solution Architect to join a full-scale ecommerce transformation for an online grocery brand. The programme is moving from a large monolithic commerce platform to a headless, modular architecture. Capabilities are being built in-house by the client's own engineering teams, rather than bought from a software vendor. Delivery is organised around customer journeys, with design and development running in parallel across several workstreams. The Solution Architect will own the end-to-end solution for one or two journeys at a time, working with engineering leads from each affected domain to show how all the pieces fit together., * Own the end-to-end solution design for one or two customer journeys at a time (for example account set-up, login and delivery slot booking), picking up further journeys as earlier ones move into implementation

 * Build an understanding of the current platform and engineering landscape, and map what is being migrated from, what it is moving to, and how the target solution fits together
 * Produce sequence diagrams and end-to-end design documentation for each journey, ready for engineering teams to implement
 * Define the interfaces between systems and what the APIs should look like, without owning code-level implementation
 * Define non-functional requirements and make sure the solution is secure, scalable and robust, and meets latency expectations across the whole journey
 * Work through cross-system dependencies and contribute to the data map
 * Work with the lead engineer assigned to each journey and an engineer from each impacted domain, bridging the gap between engineering leads so the solution hangs together
 * Support the creation of domain epics and join journey scoping and design sessions in an iterative, agile delivery model