Lead AI Back End Software Engineer (AI Architect Track)

About Nortal:

About the project
TUI, is a global business with over 70 000 people on board, great history and challenging plans for building a digital future. TUI is the largest leisure, travel and tourism company globally, and it owns travel agencies, hotels, airlines, cruise ships and retail shops.

• Lead the architecture and design of AI-powered Search solutions, covering services, data flows, and model integration
• Drive end-to-end delivery from discovery and validation to production and continuous improvement
• Design and implement solutions using GenAI models, including orchestration, evaluation strategies, and retrieval-augmented generation (RAG)
• Define reference architectures and best practices for secure, scalable, and cost-efficient model usage
• Ensure platform reliability, including latency optimisation, observability, security, and cost control
• Conduct and guide proof-of-concepts (POCs), validating approaches based on performance, accuracy, and cost
• Collaborate closely with architecture, product, data, and engineering teams to align solutions and trade-offs
• Lead technical discussions, workshops, and design reviews across teams
• Mentor engineers and contribute to building a strong engineering culture
• Research and promote new technologies, tools, and approaches in AI and backend engineering

• Strong experience designing and operating large-scale backend systems in production
• Deep proficiency in Java or Kotlin, with hands-on experience in cloud-native development
• Strong experience with microservices architecture, including performance tuning and reliability patterns
• Experience with AWS cloud architecture (networking, IAM, observability, scalability)
• Practical experience delivering AI/LLM-based solutions in production (e.g. RAG, orchestration, evaluation, monitoring)
• Strong understanding of ML/AI concepts (embeddings, retrieval, model evaluation, safety considerations)
• Experience with Python and AI/ML tooling
• Experience with REST and/or GraphQL APIs
• Experience working with SQL and/or NoSQL databases
• Strong DevSecOps mindset and experience with CI/CD pipelines
• Excellent communication skills and ability to work with both technical and non-technical stakeholders
• Leadership mindset with experience mentoring or coaching engineers
• High level of English (written and spoken)
• Proactive, ownership-driven, and comfortable working in ambiguous environments

Nice to Have

• Hands-on experience with AWS Bedrock and GenAI tooling
• Experience with OpenSearch / Elasticsearch and search relevance tuning
• Experience with Terraform and Infrastructure as Code
• Familiarity with GitLab CI or similar CI/CD tools
• Experience defining LLM evaluation frameworks (prompt versioning, testing, red-teaming)
• Understanding of event-driven architectures
• Experience working in global, distributed teams

Nortal offers:

• 24 working days of paid vacation

• 11 paid national holidays

• Health care: up to 10 paid sick days, on-demand medical insurance, vaccinations

• Mental health support: webinars, resources, and compensation for therapy sessions

• Access to our corporate learning platform

• Language classes (English)

• Flexible benefits budget: a fixed monthly amount you can spend on what matters most to you - medical insurance, sports, leisure, fuel, and more

• 8-hour workday aligned with the client’s working hours

• Hybrid work options: work from home with the option to use our cozy office space whenever needed

• Engaging team events and thoughtful gifts throughout the year

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