Senior Software Engineer - C# AND Dotnet

Who are we?

At Finastra, we’re a global leader in financial services software, dedicated to expanding access to financial services and shaping what’s next for the industry. Our technology powers mission‑critical solutions across Lending, Payments and Universal Banking, supporting over 7,000 customers, including 80% of the world’s top 50 banks, in more than 110 countries.

What will you contribute?

The Senior Software Engineer designs, builds, and evolves production systems across Finastra’s lending platform—a cloud-native, Azure-hosted ecosystem serving lending origination, underwriting, compliance, and servicing workflows. This is a system-ownership role: you are responsible for the quality, scalability, and operational readiness of the software you deliver, not just the code you write. 

AI-assisted development is the standard way of working on this team. You will be expected to use AI tooling daily to accelerate delivery while maintaining the engineering rigor required of enterprise financial software. 

Responsibilities & Deliverables: 

• Design and implement production-grade services and UI features across the lending platform 
• Own technical decisions that balance delivery speed with long-term system health and maintainability 
• Build and maintain RESTful APIs, background services, and event-driven integrations.
• Write clean, secure, and testable code; participate in code reviews enforcing SOLID principles, async/await correctness, and EF Core best practices 
• Collaborate closely with product management, UX design, and quality engineering from concept through delivery 
• Contribute to architectural discussions, design reviews, and technical documentation including ADRs 
• Mentor other engineers and raise the technical bar through code review and knowledge sharing 
• Other duties and projects as assigned 

Technical Environment: 

• Back-end: C#/.NET (ASP.NET Core, Entity Framework Core), .NET 10/.NET4.8, RESTful API design, WCF 
• Front-end: Angular, TypeScript, Angular Material, MVC 
• Cloud & Infrastructure: Azure (App Service, App Insights, Redis, Azure SQL, Docker, Azure AD), Kubernetes
• Data: SQL Server, LINQ, EF Core  
• DevOps & Tooling: CI/CD pipelines, PowerShell, Git 

Required Experience: 

• Demonstrated professional software development experience including both architecture and implementation 
• Strong proficiency in C#/.NET and Angular for full-stack development 
• Hands-on experience designing and consuming RESTful APIs and distributed, event-driven systems 
• Deep understanding of secure coding practices, automated testing strategies, and CI/CD pipelines 
• Experience with Entity Framework Core including query optimization, change tracking, and migration management 
• Working knowledge of Azure cloud services 
• Experience in code review as both author and reviewer, with a focus on quality, security, and maintainability 
• Financial services or regulated-industry experience preferred 

AI Fluency Expectations 

This role requires daily, hands-on use of AI-assisted engineering. You are expected to: 

• Use GitHub Copilot (IDE and CLI) as a default part of your development workflow 
• Author and maintain structured context files (PRDs, design docs) that guide AI agents toward accurate output 
• Orchestrate AI agents to generate code, scaffold tests, review pull requests, and identify defects 
• Decompose complex work into planning and execution steps that AI can accelerate 
• Exercise strong engineering judgment over all AI-generated output—AI is treated as a junior collaborator whose work you guide, review, and refine 
• Embed AI into project delivery to drive productivity, automate routine activities, strengthen decision quality through trusted data, and deliver continuous process improvement while applying appropriate human judgement.

Why This Role 

• AI-native development is the standard, not an experiment—you will help define how modern software is built at enterprise scale 
• Real architectural influence on a complex, production platform with legacy bridges, multi-service Azure infrastructure, and third-party integrations 
• Engineers are trusted with system ownership, not just ticket execution 
• Your work directly supports lending operations that serve real customers and carry real regulatory weight 

We are proud to offer a range of incentives to our employees worldwide. These benefits are available to everyone, regardless of grade, and reflect the values we stand for:

Flexibility: Enjoy unlimited vacation, subject to local regulations and business priorities. Benefit from hybrid working arrangements and inclusive policies such as paid time off for voting, bereavement, and sick leave.

Well‑being: Access confidential one‑to‑one support through our Employee Assistance Program, connect with our network of Wellbeing Champions and Gather Groups, and take part in monthly events and initiatives designed to help you thrive—inside and outside of work.

Health & Financial Security: Medical, life and disability insurance, retirement plans, lifestyle, and other benefits.*

Sustainability: Paid time off for volunteering and donation‑matching opportunities to support causes that matter to you.

Inclusion: Get involved in our inclusion communities, such as Count Me In, Culture@Finastra, Proud@Finastra, Disabilities@Finastra, and Women@Finastra—open to everyone who wants to participate and contribute.

Career Development: Access online learning and accredited courses through our Skills & Career Navigator tool.

Recognition: Take part in our global recognition program, Finastra Celebrates, and share your voice through regular employee surveys that help shape our culture and ways of working.

*Specific benefits may vary by location.

At Finastra, each individual is unique—bringing their own ideas, perspectives, cultural backgrounds, and experiences. We learn from one another, value what makes us different, and create an environment where everyone feels included, supported, and able to be their authentic selves.

Be unique. Be exceptional. Help us make a difference at Finastra.

Applicants for this position need to be located in posted location or their immediate surrounding areas. Due to the requirements of this position, this job posting is not available for, and Finastra will not be considering any applicants who currently reside in New York City or California.