Principal Data Scientist - Optimisation Engineering at easyJet | GB | Rezi

Principal Data Scientist - Optimisation Engineering at easyJet

Principal Data Scientist - Optimisation Engineering

easyJet · GB

2 weeks ago

Principal Data Scientist - Optimisation Engineering

easyJet · GB

18 days ago
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About the Role

Lead an optimisation engineering team building decision-support products that solve complex disruption-management and crew/roster optimisation challenges. Translate operational problems into scalable software and optimisation solutions, partnering closely with product, data/operations research (OR), and customer stakeholders. The role blends people leadership with hands-on technical direction across architecture, delivery, quality, and reliability.

Responsibilities

  • Lead, coach, and grow a cross-functional team of software engineers and partnered OR/data science specialists.
  • Own technical direction and delivery for products that model, optimise, and operationalise solutions to disruption and crewing problems.
  • Drive architecture and design decisions for services, APIs, data pipelines, and user-facing workflows that support optimisation at scale.
  • Partner with product management to shape roadmap, break down ambiguous problem statements, and define measurable outcomes and acceptance criteria.
  • Collaborate with OR/optimisation experts to integrate solvers and ensure model performance, correctness, explainability, and maintainability.
  • Establish strong engineering practices: code review, automated testing, CI/CD, release management, incident response, and post-incident learning.
  • Build observability into optimisation services and manage performance tuning across environments.
  • Contribute hands-on when needed, while primarily enabling the team to deliver consistently.

Requirements

  • Proven experience leading a software engineering team delivering production-grade systems (people leadership and/or strong technical leadership), that encompass solver technology.
  • Strong software engineering fundamentals: system design, distributed systems concepts, APIs, data modelling, testing, and operational excellence.
  • Experience building optimisation, scheduling, or decision-support applications, or closely related domains requiring complex constraint-based reasoning.
  • Working knowledge of mathematical optimisation concepts and how they impact product design.
  • Hands-on programming experience in one or more mainstream languages (e.g., Python, Java, C#, C++), with the ability to review and guide code quality.
  • Experience integrating and operating optimisation components.
  • Ability to communicate clearly with both technical and non-technical stakeholders, and to translate operational needs into engineering deliverables.

Skills

  • Optimisation: Gurobi (or equivalent), model libraries/APIs, batching/warm starts, parameter management, sensitivity analysis.
  • Languages: Python and/or Java/C#/C++.
  • Services: REST/gRPC APIs, microservices and/or modular monoliths, asynchronous job orchestration.
  • Data: SQL, data pipelines/ETL/ELT, caching strategies, data quality checks, reproducible inputs/outputs.
  • DevOps: CI/CD, infrastructure as code, containerisation (e.g., Docker), monitoring/alerting, incident management.
  • Quality: unit/integration tests, performance tests, model validation frameworks, feature flags.

Location

  • Hybrid

Work Type

  • Hybrid working policy of 40%-60% of the month spent with colleagues.

Experience Level

  • Principal

Salary/Compensations

  • Competitive base salary
  • Annual bonus

Benefits

  • 25 days holiday
  • Pension scheme
  • Life assurance
  • Flexible benefits package
  • Discounted staff travel scheme for friends and family
  • Annual credit for discount on easyJet holidays
  • ‘Work Away’ scheme, allowing you to work abroad for 30 days a year
  • Electric vehicle lease salary sacrifice scheme

About the Company

  • easyJet is a FTSE-250 listed, £multi-billion low-cost airline that serves tens of millions of customers every single year.
  • We fly more than 1,207 routes, connecting 38 countries across Europe, and employ more than 18,000 colleagues.
  • Our mission is to make low-cost travel easy.
  • Our Promise Behaviours – we are Safe, Bold, Welcoming and Challenging.

Equal Opportunity

  • At easyJet, we are dedicated to fostering an inclusive workplace that reflects the diverse customers we serve across Europe. We welcome candidates from all backgrounds.
  • If you require specific adjustments or support during the application or recruitment process, such as extra time for assessments or accessible interview locations, please contact us at ma.recruitment@easyjet.com.
  • We are committed to providing reasonable adjustments throughout the recruitment process to ensure accessibility and accommodation.