Back-end Developer (Java &Spring Boot/Python)

Company: United States Digital Space LLC
Apply for the Back-end Developer (Java &Spring Boot/Python)
Location: London
Job Description:

Salary: £55k to £65K

Methods is recruiting for a Back-end Developer specialising in Java Spring Boot and Python to join our team within the private Sector Business unit on a permanent basis. This is a hybrid role, requiring three days a week on-site in our London office.

Requirements

Architectural Rebuild: Play a leading role in migrating and rebuilding our core architecture in Java Spring Boot to align with a composable, cloud-native landscape.

Connector Development: Design and optimize technical connectors for a diverse mix of global channels, including generalist marketplaces, social commerce (e.g., TikTok Shop), and quick-commerce (e.g., Glovo, Deliveroo).

Catalog Publication Flow: Refocus efforts on rebuilding the catalog publication flow, addressing technical complexities such as category mapping, product variant synchronization, and asynchronous marketplace APIs.

Business Logic Migration: Collaborate on transferring complex legacy business rules (pricing calculations, stock filtering, and fulfilment decisions) into the dedicated BCP assets to ensure OMC focuses purely on orchestration and connectivity.

System Reliability: Ensure 100% accurate real-time synchronization of stock and price updates to prevent financial discrepancies and enhance the customer experience.

Technical Skills

  • Java Spring Boot: Confirmed level proficiency for the architectural rebuild
  • Database: PostgreSQL
  • Cache: Redis / Valkey
  • Architecture: REST Architecture and Event-Driven architecture.
  • Cloud & Infrastructure: Google Cloud Platform GCP and Kubernetes clusters

Desirable

Experience with Python to facilitate the transition of legacy components.

Private sector experiences.

Note: This role will require you to have or be willing to go through Security Clearance. As part of the onboarding process candidates will be asked to complete a Baseline Personnel Security Standard; details of the evidence required to apply may be found on the government website Gov.UK. If you are unable to meet this and any associated criteria, then your employment may be delayed, or rejected. Details of this will be discussed with you at interview.

Benefits

As well as this, we offer:

Development

Access to LinkedIn Learning, a management development programme and training.

Wellness

24/7 Confidential employee assistance programme.

Social

Office parties, pizza Friday and commitment to charitable causes.

Time off

25 days of annual leave a year, plus bank holidays, with the option to buy 5 extra days each year.

Volunteering

2 paid days per year to volunteer in our local communities or within a charity organisation.

Pension

Salary Exchange Scheme with 4% employer contribution and 5% employee contribution.

Life Assurance

Of 4 times base salary.

Private Medical Insurance

Which is non-contributory (spouse and dependants included).

Worldwide Travel Insurance

Which is non-contributory (spouse and dependants included).

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Posted: June 15th, 2026