Software Engineer (Digital) in Hemel Hempstead

Warner Hotels is rebuilding its guest-facing digital estate on a modern, microservices architecture — moving away from a fragmented collection of out-of-the-box portals toward a purpose-built digital platform that delivers personalised, seamless guest experiences across discovery, booking, pre-stay, and in-stay touchpoints.

The Software Engineer (Digital) is a hands-on software engineer who builds the digital products that guests and staff experience every day — including Warner Hotels. co. uk, the My Warner guest portal, the Club Warner loyalty platform, and the AI concierge booking assistant.

The architecture is built on a React/Next. js front-end, with a back-end of independently deployable .

NET 8 / ASP.

NET Core microservices hosted on AWS — a mix of serverless (Lambda) and containerised (ECS/Fargate) deployments depending on service characteristics.

You will be embedded in sprint teams alongside the Digital Tech Lead, internal colleagues, and the nearshore engineering partner (Frontline) — writing production-quality code, participating in architecture discussions, and taking genuine engineering ownership of the features and services you deliver.

This is a role for an engineer who cares about the craft: clean code, well-designed APIs, comprehensive tests, and digital experiences that actually work beautifully for guests

Key Responsibilities include

• Front-End Feature Development
• Build and maintain features across Warner's guest-facing digital products using React and Next. js — implementing server-side rendering, static generation, and client-side interactions to the agreed architecture patterns.
• Contribute to the continuous improvement of Warner Hotels. co. uk — search experience, IBE booking funnel, conversion optimisation, and promotional campaign delivery — in partnership with the commercial and marketing teams.
• Build and maintain the My Warner guest portal — delivering logged-in guest journeys including pre-stay upsell, activity booking, and in-stay engagement features.
• Contribute to Club Warner loyalty platform features — enrolment flows, member personalisation, and loyalty mechanics — consuming APIs from back-end services.
• Back-End Microservice Development
• Design and build .

NET 8 / ASP.

NET Core microservices that form the back-end of Warner's digital platform — implementing REST APIs, domain logic, and integration with Warner's core systems (i Stay, Maestro, Bloomreach, Optimizely, Amazon Connect).

• Deploy and operate microservices on AWS using a mix of Lambda (for event-driven and short-lived compute) and ECS/Fargate (for longer-running, containerised services) — selecting the appropriate hosting model for each service's requirements.
• Implement event-driven communication between services using AWS SQS, SNS, and Event Bridge — ensuring loose coupling and resilience across the microservices estate.
• Contribute to integrations with the Whats App Business API via Amazon Connect for inbound customer engagement.
• API Design & Integration
• Design RESTful APIs to agreed standards — implementing Open API specifications, versioning, and API documentation for all services you build.
• Work with the Integration Architect to ensure services are built to Warner's API governance standards and registered in the API catalogue.
• Consume and integrate third-party APIs from Optimizely, Bloomreach, i Stay, and Maestro — implementing appropriate error handling, retry logic, and circuit breakers.
• Write unit tests, integration tests, and end-to-end tests for all features and services — maintaining test coverage to agreed standards
• Commit code through CI/CD pipelines (Git Hub Actions) — following branching strategy, automated build, test, lint, and deployment processes consistently.
• Participate in code reviews — providing constructive feedback to nearshore partners and internal colleagues, and actively responding to feedback on your own code.
• Monitor production services and respond to incidents within your service domain — investigating root cause and implementing permanent fixes.
• Participate fully in sprint ceremonies — sprint planning, stand-ups, reviews, and retrospectives.
• Work collaboratively nearshore engineering partner — sharing architectural context, reviewing their pull requests, and contributing to a high-performing cross-geography engineering culture.
• Front-End
• React (required): component architecture, hooks, state management (Redux, Zustand, or Context API).
• Next. js (required): App Router, server components, server-side rendering, static generation, middleware, and API routes.
• Type

Script: required across both front-end and back-end.

• CSS: Tailwind CSS or CSS Modules; responsive and accessible design (WCAG 2.1 AA).
• Headless CMS integration: Optimizely and Bloomreach — experience with headless CMS patterns and personalisation APIs.
• Back-End & Microservices
• .

NET 8 / ASP.

NET Core (required): REST API development with minimal APIs or controller-based approaches, middleware pipelines, dependency injection, and configuration management.

• C#: clean, idiomatic C# — LINQ, async/await, records, pattern matching.
• Microservices patterns: independently deployable services, API contracts, loose coupling, domain-driven service boundaries, circuit breakers (Polly or equivalent).
• Messaging: AWS SQS and SNS for asynchronous service communication; AWS Event Bridge for event-driven patterns.
• API design: RESTful design principles, Open API/Swagger specification, API versioning, and documentation.
• Authentication & security: OAuth 2.0, JWT, OWASP standards, PCI-DSS awareness for payment-adjacent services.
• AWS Hosting
• AWS Lambda: serverless . NET 8 functions for event-driven compute, lightweight APIs, and scheduled tasks — using the AWS . NET Lambda runtime.
• AWS ECS/Fargate: containerised . NET microservice deployments for longer-running or higher-throughput services.
• Supporting AWS services: API Gateway, S3, Cloud Watch, X-Ray, Parameter Store/Secrets Manager
• Docker: containerisation of . NET microservices for ECS/Fargate deployment.
• CI/CD: Git Hub Actions — automated build, test (x Unit, Jest), lint, Docker build, and deployment pipelines.
• Testing: x Unit and Moq for . NET unit and integration tests; Jest and React Testing Library for front-end; Playwright for end-to-end testing.
• Version control: Git — branching strategy, pull request workflow, semantic versioning.
• Observability: structured logging (Serilog or equivalent), AWS Cloud Watch metrics and alarms, distributed tracing with AWS X-Ray.
• Beneficial
• AI/conversational integration: Open AI API or equivalent LLM integration for the AI concierge feature.
• Whats App Business API and Amazon Connect integration experience.
• Hospitality domain: i Stay (CRS) and Maestro (PMS) API familiarity — useful but not required.
• The benefits of working with us
• Annual Bonus: up to 15% of salary, based on your personal and business performance
• 25 days annual leave per year + flexible 8 bank holidays + you can purchase up to 5 days additional leave per year
• 20% discount at breaks at Warner, Butlins & Haven + additional discounts during your stays
• Help @ Hand from Unum - including virtual GP, Physiotherapy support, Mental Health sessions
• Life Assurance
• Free Car Parking
• Electric Vehicle scheme
• Enhanced Family Friendly policies
• Refer a friend scheme
• Aslan: Our Reward & recognition portal includes access to a financial wellbeing platform
• Access to a discounts platform including a points based discount plan to increase your retail discounts
• Employee Assistance Programme
• L&G Care Concierge
• Glow Getters and Long Service Awards

We genuinely care about every candidate's experience during the recruitment process and are here to provide support where we can.

#J-18808-Ljbffr