Full time
Your future team
Join our Digital Factory at Deloitte Luxembourg — a multidisciplinary team of ~85 technology professionals and financial domain experts working together to build high-impact digital solutions for the financial sector. We develop modern, data-driven products serving clients in banking, investment funds, and asset management, in a collaborative Agile environment with a strong focus on engineering quality and continuous improvement.
As a Senior Engineer, you will be a key technical pillar of the team – owning solutions end-to-end, shaping our engineering practices, and helping grow the people around you.
Your advantages of joining us
- Work that has real impact Build and architect data-intensive applications used by major financial institutions, leveraging modern engineering standards and AI-enabled tooling. Your decisions will directly influence product quality and client outcomes.
- Technical leadership & career growth Take ownership of architectural decisions and technical direction, with a clear path toward Lead Engineer and Architect roles. Benefit from a dedicated learning budget, internal tech talks, and access to Deloitte's global knowledge network.
- Global reach, local roots Contribute to international projects and collaborate with diverse teams across Deloitte's global network, all while being anchored in Luxembourg – one of Europe's leading financial centers.
- Flexible, inclusive culture We trust our people. Enjoy flexible hybrid working arrangements, a culture where your voice genuinely shapes how we work, and a team that values both performance and wellbeing.
- A team that builds together Work side by side with financial experts, product owners, and fellow engineers in a startup-minded environment within a globally recognized firm.
Engineering & Architecture
- Architect, develop, and own robust full-stack applications from concept to production, with a strong focus on scalability, resilience, and maintainability in a financial services context
- Design and implement high-performance, data-intensive APIs, processing workflows, and integrations using C#/.NET and SQL Server
- Define and apply sound architectural patterns (e.g., clean architecture, CQRS, event-driven design) appropriate to the problem at hand
- Build scalable, performant user interfaces with React, applying strong component architecture and state management best practices
- Define, promote, and enforce engineering standards across the team: code reviews, testing strategies (unit, integration, E2E), and CI/CD pipeline ownership
- Own non-functional requirements including performance, security, and observability
- Proactively identify technical debt and drive pragmatic remediation plans
- Act as a technical mentor for junior and mid-level engineers, supporting their growth through pairing, feedback, and knowledge sharing
- Lead technical discussions and drive consensus across engineers and business stakeholders
- Translate complex business requirements into clear, actionable technical designs
- Contribute to hiring by participating in technical interviews and candidate assessments
- Communicate delivery risks, scope, and progress transparently to the team and project leads
- Champion Agile best practices within the team, contributing to sprint ceremonies with a focus on sustainable delivery and continuous improvement
- Propose and implement improvements to team processes, tooling, and ways of working
- University degree in Computer Science, Software Engineering, or another relevant field.
- Fluent English is required. French is considered an asset.
- 5 to 10 years of hands-on experience in software development, with a proven track record of delivering complex, production-grade full-stack applications. Experience in the financial sector is a plus.
- Technical skills : C#/.NET (Core), SQL/relational databases, React development, API design, CI/CD definition.Nice-to-have: Cloud platforms, Containerization, Event-driven architecture, AI integration.
- Technical leadership: Ability to lead design discussions, make well-reasoned decisions under ambiguity, and bring others along
- Mentorship mindset: Genuine
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