Senior Java Backend Developer F/M/X

Accor Tech & Digital is the innovation and technological transformation lab of the world leader in hospitality.

Our teams, known as Heartists®, bring together the best of hospitality with the best of tech and digital. Our ambition is to provide our customers with personalized, memorable, and sustainable experiences.

Here, we create new ways to travel within each of our 5,500 hotels, connecting closely with our 100 million clients in 110 countries.

Here, we are at the heart of an incredible playground for technological transition and the design of digital products and services for our customers and hotel teams.

Here, your scope will know no boundaries;

So join us and dare to make an impact on the world!

Here is where your greatest challenge awaits you:

Within the Engineering team, you will join the API Customer, Loyalty & Messaging team, responsible for a strategic middleware layer that orchestrates all flows related to customer data, bookings, loyalty, and communications.

This team plays a central role in the IT landscape, acting as an interface between core business systems and consumer-facing channels. It works on high-impact business topics, closely tied to the customer experience.

You will report to the Tech Lead and collaborate closely with other Backend Developers, Product Owners, and business teams.

Your Mission

As a Senior Java Backend Developer, you will be responsible for:

• Building APIs at the core of booking and order journeys

  • Developing and evolving scalable back-end services and APIs supporting critical customer journeys

  • Ensuring quality through testing, performance optimization, and maintainability in production

• Structuring and exposing enterprise customer loyalty data

  • Designing robust APIs for B2B data aggregation and access

  • Working on data modeling and integration with existing systems

• Contributing to the migration to our new central reservation system

  • Adapting and interfacing services with a new event-driven architecture

  • Ensuring service continuity and reliability of data flows

• Evolving authentication mechanisms and account management

  • Implementing and improving secure authentication processes

  • Optimizing code performance, resilience, and quality through continuous improvement

• Developing multi-channel messaging services (app, SMS, email)

  • Designing integrations with multiple providers and managing asynchronous flows

  • Building reliable services for notification and authentication journeys

• Operating in a modern, stimulating technical environment

  • Working on API and microservices architectures in an agile context

  • Collaborating with cross-functional teams and contributing to technical decisions

And you?

Qualifications

• Degree in Computer Science (Engineering school, Master’s, or equivalent)

• Proven experience (6+ years) in Java back-end development in high-traffic environments

• Experience with critical, customer-focused products and business-impact projects

Technical Skills

• Strong expertise in Java and Spring Boot for back-end and API development

• Experience with Kafka and asynchronous communication architectures

• Mastery of queuing and streaming concepts

• Ability to design and operate large-scale event-driven systems (hundreds of millions of requests per day)

• Good understanding of cloud and distributed architectures (event-driven)

• AWS experience highly appreciated (infrastructure management)

• Infra/production expertise or strong interest is highly valued

• Ability to design, expose, and consume robust and performant APIs

• Awareness of scalability, resilience, and observability in production

• Interest in Node.js / TypeScript appreciated (complementary services, integrations, tooling)

• Run-oriented DevOps culture: hands-on experience managing production (incidents, monitoring, performance)

Soft Skills

• Analytical mindset and ability to understand complex systems

• Passion for quality, reliability, and continuous improvement

• Ability to collaborate closely with product and business teams

• Autonomy, technical curiosity, and proactive attitude

• Comfort working in an agile, dynamic, and fast-evolving environment

Accor dares to impact:

- The world:

• Accor is committed to the world around us, with a strong employer culture focused on the development of our 300,000 talents.

• We adopt a continuous improvement approach to reduce the impact of digital on the environment across all our projects.

- Your career:

• We enable all our employees to manage their work-life balance and offer them the means to shape their work environment according to their preferences.

• Training and career paths are defined both individually and collectively, allowing us to grow together on a daily basis.

- Specifically, at Accor Tech & Digital:

• Remote work available several days per week from France, with flexible work options: work from home, from our offices, or even from our hotels and coworking spaces through Worklib.

• Every Wednesday afternoon, dedicate your time to deep work and personal development.

• Work in a multicultural and English-speaking environment.

• Continuous improvement & training: hackathons, exceptional technology partnerships, dedicated talent management, certifications and a dedicated learning platform.

and also,

• ALL - Heartist® Program: unforgettable stays and experiences at all Accor locations and partner venues worldwide.

• Heartist® for Good Program: commit to supporting an association of your choice from those available on our volunteering platform (1 day offered per year by the Group during your working hours).

• An Employee Social Committee (CSE) supporting the financing of your cultural and sports activities.

• Sustainable Mobility Package for the use of eco-friendly transportation or access to a company bike program in partnership with Zenride.

• Coverage of urban public transport subscriptions between home and workplace, in accordance with the rates set by French law “Loi Finance”.

• €11 meal vouchers.

• A mandatory health insurance plan funded at 50% by Accor without additional costs in case of enrollment of your dependents.

• Attractive working conditions with collaborative workspaces, restaurants, and recreational areas as well as wellness and sports facilities, on-site or through Gymlib.

Your talent and motivation are our only selection criteria.

We value the richness of diverse nationalities, personalities, and professional backgrounds.

We know how to adapt to the specific needs of our employees, including those with disabilities.

We encourage all applications, regardless of gender, so go ahead and apply!

Recruitment is all about people!

Is this mission appealing to you? Apply, and we will offer you:

1. A meeting with our recruitment team to present the essential aspects of the position to you or guide you towards the role that may suit you.

2. An interview with the team manager responsible for the role you are interested in.

3. For some roles, you might also be required to complete an assessment (use case and motivation questionnaire.

4. A final interview with our Human Resources team to discuss our Group's culture, work environment, training program, career prospects, as well as various benefits offered by the Group.

5. A personalized feedback.

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