Senior Backend Developer

This is Us

Ingenious Lion is a Digital Tech Hub designed exclusively for Publicis Groupe, one of the world’s leading marketing agencies.

As the marketing industry continues to drive digital transformation, Publicis Groupe empowers its clients with innovative data solutions and media ecosystems. Ingenious Lion has one mission: to partner with Publicis’ global teams in creating innovative data and digital tech products that will shape the future and delight Publicis Groupe clients.

What makes us successful? Two key ingredients: we seek the good and the best, meaning we cultivate a thriving company culture. We’re committed to creating an environment where people don’t just work; they grow, challenge themselves, strive for excellence, and are recognized for their invaluable contributions to the team.

If you're curious to learn more about us, here are four things you should know:

• Our company culture is anchored in five powerful values: Joy, Honesty, Connectivity, Own Challenger, and Greater World. Do these values resonate with you?
• We are committed to diversity and inclusion because we believe our unique differences make us stronger.
• We encourage open communication and create an environment where everyone’s voice is heard and every contribution is valued.
• Finally, we’re somewhat “obsessed” with quality. We believe in continuous learning and knowledge sharing; when we hit a roadblock, we don’t just complain—we create solutions to overcome it.

In one sentence, we are a group of people with an unusual aptitude for generating great ideas, groundbreaking concepts, and infusing them with positive energy and good fun.

Feeling Ingenious already? 

A Sneak Peek at Your Future Role

As a Senior Backend Developer, your mission is to build and maintain backend systems while occasionally contributing to frontend efforts. This role centres on developing services that serve as the backbone of a data-driven application, supporting integrations, user management, and senior stakeholder access.

You'll play a key part in a squad focused on large-scale application migration, scalability, and system optimisation. You’ll work closely with the team and product managers to ensure technical proficiency and deliver reliable solutions aligned with business goals.

You will contribute to architectural design discussions, participate in peer reviews, and advocate for engineering best practices. From onboarding through to active development, your input will be essential in securing roadmap deadlines without compromising system stability or code quality.

Here Are the Key Tasks You'll Be Working on Every Day

• Design, develop, and maintain backend services that support an application used for data ingestion, facilitating the migration of users, clients, and data workflows from legacy systems to the new platform, while ensuring optimal performance and stability. 
• Contribute to frontend tasks to support the existing UI layer and maintain cohesion across all components. 
• Collaborate within a cross-functional Scrum team, ensuring all deliverables align with business and technical priorities. 
• Participate in sprint ceremonies, pair programming, and architectural discussions, actively reviewing code, distributing workload, and applying best practices to shared libraries and system processes. Suggest ideas for technical optimization, propose solutions, and uphold high standards of code quality, test coverage, and engineering discipline throughout the platform.

We're Thrilled to Have You Consider Joining Our Team. Here Are the Qualifications We're Seeking

• At least six years of experience in backend development with .NET Core and C#, including Entity Framework Core, SQL Server, and data access patterns.
• Working knowledge in frontend development with React, Vite, TypeScript, and proficiency in JavaScript, HTML, and CSS.
• Proficiency with software engineering principles, design patterns, and RESTful API design and implementation.
• Proficiency in automated testing for backend systems using xUnit and frontend with Vitest and Cypress.
• Working knowledge of AWS native services and cloud-native development principles.
• Hands-on experience with Git and modern version control workflows.
• Strong communication skills in English, both written and spoken.

Skills That Would Make You Shine Even Brighter!

• You are familiar with OAuth and secure user authorization flows.
• You have exposure to CI/CD pipelines, including YAML configurations, Terraform, and Azure DevOps.
• You have previous involvement in permission management systems or identity access control platforms.