Principal Software Engineer - SQL​/Data

Job Description
- Senior Staff Software Engineer
- Data (16498)

Job Description

Senior Staff Software Engineer
- Data (16498)

We’ve landed! When it comes to innovation and achievement, there are few organisations with a better track record. Join us as we embark on an ambitious journey, evolving our digital commerce platforms and building scalable, resilient, and innovative foundations that enable seamless customer experiences across web, mobile, and connected channels.

Finding brilliant tech talent is vital to the future of easy

Jet. With opportunities to work across the technology that powers our app, website, and other digital touchpoints, you’ll help connect over 100 million customers to thousands of their favourite destinations!

Located in the One Parc Central building in Sant Martí, with hybrid working available, we’re looking to connect with Product, UX, and Software Development professionals who share our passion for making an impact and helping people all over Europe Get Out There. Apply now and be a part of easy

Jet’s first digital hub, in the heart of Barcelona!

As a Principal Software Engineer within the eCommerce Platform Delivery team, you will provide leadership and technical stewardship across multiple squads within a defined Mission. You will be responsible for the overall design and accountable for upholding engineering standards, ensuring the delivery of robust, secure, scalable, and high-performance systems. Your role will involve guiding teams towards technical excellence, fostering a culture of continuous improvement, and driving high performance across all aspects of software development.

Working closely with Product Managers, Agile Delivery Managers, Enterprise Architects, and the Chapter Lead for Software Engineering, you will ensure engineering standards are upheld, guide complex technical solutions, and align strategy, approach, and principles across the Mission. By championing best practices, modern architectures, and innovation, you will accelerate the delivery of customer-facing features, improve platform resilience, and ensure the platform remains robust, scalable, and future-ready.

• Own the Mission technical vision, strategy, and roadmap, ensuring alignment with business objectives and platform standards.
• Take accountability for technical delivery and execution of the technical vision and strategy across multiple squads.
• Lead the design, architecture, and development of scalable, reliable, and high-performance software systems, including system design, technology selection, and overall architecture.
• Champion data integrity and performance, ensuring systems are designed for scalability and operational resilience.
• Own the delivery of key product features, ensuring they meet performance, security, and scalability requirements.
• Ensure the quality of code delivered across squads, adhering to best practices and engineering standards.
• Actively contribute to and lead code reviews, providing constructive feedback to continuously improve code quality and team capability.
• Utilise metrics and feedback loops to monitor team performance, identify areas for improvement, and drive the continuous development of high-performing engineering teams.
• Mentor and provide guidance to junior and mid-level engineers, fostering a culture of continuous learning and improvement.
• Stay informed of industry trends, emerging technologies, and methodologies, applying insights to improve software development practices and platform capabilities.

• Ability to link technical strategy and architectural decisions to measurable outcomes, including feature performance, platform reliability, and customer impact.
• Deep knowledge of SQL, databases, data modelling, and performance optimisation.
• Proven expertise in cloud and commerce technologies, including AWS.
• Strong background in Microsoft technologies, including C# .NET
• Extensive experience in observability, leveraging tools for monitoring metrics, telemetry, alerts, and logs to ensure system reliability and performance.
• Expertise in data architecture and modelling, with a strong understanding of legacy systems…