Software Engineer (Digital) NEW Posted yesterday Hemel Hempstead 45000 - 60000 / year

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 WarnerHotels.co.uk, the MyWarner 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 WarnerHotels.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 MyWarner 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 (iStay, 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 EventBridge — ensuring loose coupling and resilience across the microservices estate.
• Contribute to integrations with the WhatsApp Business API via Amazon Connect for inbound customer engagement.

API Design & Integration

• Design RESTful APIs to agreed standards — implementing OpenAPI 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, iStay, and Maestro — implementing appropriate error handling, retry logic, and circuit breakers.

Engineering Quality

• 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 (GitHub 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.

Collaboration

• 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.

You’ll need to have experience in:

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.
• TypeScript: 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 EventBridge for event‑driven patterns.
• API design: RESTful design principles, OpenAPI/Swagger specification, API versioning, and documentation.
• Authentication & security: OAuth 2.0, JWT, OWASP standards, PCI‑DS 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, CloudWatch, X‑Ray, Parameter Store/Secrets Manager
• Docker: containerisation of .NET microservices for ECS/Fargate deployment.

DevOps & Engineering Practices

• CI/CD: GitHub Actions — automated build, test (xUnit, Jest), lint, Docker build, and deployment pipelines.
• Testing: xUnit 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 CloudWatch metrics and alarms, distributed tracing with AWS X‑Ray.

Beneficial

• AI/conversational integration: OpenAI API or equivalent LLM integration for the AI concierge feature.
• WhatsApp Business API and Amazon Connect integration experience.
• Hospitality domain: iStay (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
• Pension scheme: 3% employer, 5% employee
• 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. If you require any assistance or reasonable adjustments while applying, please don't hesitate to reach out to us at:

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