Principal Software Engineer
MondoAbout the role
Job Title: Principal Software Engineer / Lead (.NET)
Location-Type: Hybrid - Windsor, CT (4 days onsite per week)
Start Date: To be confirmed
Duration: Contract-to-Hire
Compensation Range: $52/hr - $75/hr
Benefits: Eligible for Health, Dental, Vision, and 401K
Visa Sponsorship: Not eligible for visa sponsorship
Job Description:
This is a senior individual contributor and technical leadership role responsible for setting architectural direction, driving platform modernization, and raising engineering capability across multiple teams and product lines for the client's enterprise application landscape.
Job Summary
•Lead architectural governance, design reviews, and strategic technology decisions across 4-6 engineering teams spanning multiple product lines.
•Design scalable, resilient enterprise solutions using modern .NET technologies, defining integration patterns, service ownership models, and system boundaries.
•Drive modernization of legacy .NET Framework applications to modern .NET platforms using cloud-native, microservices, and event-driven architectures where justified.
•Champion engineering quality through code reviews, mentorship of senior engineers and technical leads, and establishment of standards adopted across multiple teams.
•Partner with infrastructure, security, platform, and operations teams to advance CI/CD standardization, Infrastructure as Code, and self-service developer platform capabilities.
•Embed secure-by-design practices into architecture and delivery standards, contributing to threat modeling, vulnerability management, and regulatory compliance.
•Translate business goals into scalable technical solutions and communicate architectural vision to both technical and executive audiences.
Minimum Requirements:
•15+ years of professional software engineering experience with significant enterprise application development background.
•Deep expertise in C#, ASP.NET, ASP.NET Core, and modern .NET platforms, including legacy .NET Framework 4.x for modernization context.
•Demonstrated experience designing and implementing enterprise-scale distributed systems in production environments.
•Proven track record of leading technical initiatives across multiple teams without direct authority.
•Experience delivering cloud-based solutions in a production environment, with Azure preferred.
•Strong written and verbal communication skills with the ability to influence senior stakeholders and translate technical trade-offs into business terms.
Preferred Qualifications:
•Experience with Microsoft Azure at enterprise scale, including platform engineering and internal developer platform practices.
•Experience leading large-scale legacy modernization or cloud migration programs end-to-end.
•Experience in a regulated industry such as insurance, financial services, or healthcare.
•Relevant certifications such as Microsoft Certified Azure Solutions Architect Expert or Azure DevOps Engineer Expert.
•Experience with SRE practices including SLO definition, error budgets, and incident command.
•Experience integrating AI or GenAI capabilities into enterprise applications.
Responsibilities
- Lead architectural governance, design reviews, and strategic technology decisions across multiple engineering teams.
- Design scalable, resilient enterprise solutions using modern .NET technologies.
- Drive modernization of legacy .NET Framework applications to modern .NET platforms.
- Champion engineering quality through code reviews and mentorship.
- Partner with infrastructure, security, platform, and operations teams to advance CI/CD standardization.
- Embed secure-by-design practices into architecture and delivery standards.
- Translate business goals into scalable technical solutions.
Qualifications
- 15+ years of professional software engineering experience.
- Deep expertise in C#, ASP.NET, ASP.NET Core, and modern .NET platforms.
- Experience designing and implementing enterprise-scale distributed systems.
- Proven track record of leading technical initiatives across multiple teams.
- Experience delivering cloud-based solutions in a production environment.
Benefits
- Eligible for Health, Dental, Vision, and 401K
Skills mentioned
About Mondo
As the largest, national staffing agency specializing exclusively in high-end, niche IT, Tech, and Digital Marketing talent, staffing is more than just our job. It’s our passion. For nearly two decades, we’ve changed how to approach hiring needs for contract, contract-to-hire, and full-time Tech and Digital Marketing talent. As a result of our MAP mindset and proprietary process, we boast an unmatched fulfillment ratio of 75% and an average placement time of 3-5 days for contract roles and 5-10 days for full-time roles. Because we believe you deserve the right candidates the first time around. We help solve the most challenging talent gaps at midsize to enterprise-level companies every single day, along with recently VC-funded startups facing mass hiring challenges and organizations facing urgent hiring needs. When you partner with Mondo, you never have to question if you’ll find the right candidate. With a network of 1.4M+ high-end, niche Tech experts, 100+ connected industry-specific Tech Recruiters, and 10 offices nationwide, we’ve got your hiring needs covered. To learn more about how we can help you, visit www.mondo.com. Connect with us on Twitter and Instagram at @Mondo_Agents, and find us on Facebook!