Senior Software Engineer - .NET / Enterprise Application

At IT Labs , we are looking for a Senior Software Developer to join a client project focused on modernizing large-scale enterprise applications and business-critical workflows.

The role will support the transition of legacy systems into a modern application environment, with a strong focus on data migration, system integrations, workflow automation, permitting processes, and customer-facing digital services .

This is a hands-on engineering role for someone comfortable working across application development, databases, integrations, reporting, and complex existing systems.

What You'll Do

• Develop and enhance enterprise applications using C# and .NET .

• Support the modernization and migration of legacy applications, including systems built on MS Access, Mainframe technologies, and other legacy platforms .

• Ensure data integrity, validation, and consistency throughout large-scale migration activities.

• Build and maintain web functionality using JavaScript, jQuery, AJAX, and DOM manipulation .

• Develop and optimize Oracle SQL and PL/SQL , including complex queries, stored procedures, and database structures.

• Design and maintain applications using MVC architecture , including routing, application security, and maintainable development practices.

• Develop and support secure integrations using RESTful and SOAP web services .

• Build and maintain SSIS ETL processes , including data transformation and performance optimization.

• Design, deploy, and integrate SSRS reports supporting operational and business reporting needs.

• Develop and improve automated business workflows, workload assignment processes, and customer-facing digital services.

• Support online submission, tracking, invoicing, payment, and related business processes.

• Integrate applications with Enterprise Content Management (ECM) and other external systems.

• Collaborate with business users, technical teams, vendors, and other stakeholders to understand requirements and translate them into reliable software solutions.

• Support modernization of complex applications used across high-volume enterprise environments.

What We're Looking For

• Strong hands-on experience with C# and the .NET Framework .

• Solid understanding of object-oriented programming, debugging, clean code, and maintainable software design .

• Strong experience with JavaScript and jQuery , including AJAX and asynchronous web interactions.

• Advanced experience with Oracle SQL and PL/SQL .

• Experience developing applications using the MVC framework .

• Experience developing Windows and web-based applications.

• Hands-on experience with REST and/or SOAP APIs and secure system integrations.

• Strong experience with SSIS , including ETL development, data transformations, and performance tuning.

• Experience developing and integrating reports using SSRS .

• Experience modernizing or integrating large-scale enterprise applications .

• Practical experience with legacy-system migration and data migration projects .

• Experience developing or supporting complex automated workflows and business processes.

• Strong troubleshooting, analytical, and problem-solving skills.

• Excellent written and verbal communication skills and the ability to work effectively with cross-functional teams.

Nice to Have

• Previous experience supporting government, public-sector, permitting, licensing, or regulatory systems .

• Experience with large-scale application and data migration initiatives.

• Experience with permitting, inspection, review, invoicing, payment, or similar transactional workflows.

• Experience integrating enterprise applications with ECM platforms .

• Experience working with systems where historical records, regulatory requirements, and data integrity are particularly important.

Working Conditions

• Hybrid engagement , with onsite presence based on the client's project requirements.

• Full-time engagement.

• U.S. citizenship is required for this engagement.

• Engagement is offered on an Individual Contractor or B2B contract basis.

• Paid Time Off (PTO) is included as part of the engagement.

• Full-time commitment, working in alignment with the client's business hours and project needs.

• Long-term collaboration with IT Labs, working directly with an enterprise client environment.

Our values

We are a company that seeks the best for both our employees and clients, reaching beyond expectations in turning dreams into reality. Our way of working is rooted in our core values (Integrity, Excellence, Proactivity, Innovation, and People), with an expectation that our future colleagues will make these their second nature in their everyday work and life. We don’t ask for perfection, but we do appreciate people motivated to better themselves in every conceivable aspect.

About IT Labs

Founded in 2005, IT Labs is an international software tech company, specializing in purpose and process-driven teams for high-performance, innovation, transformation, and efficiency. Our HQ is in Palm Beach Gardens, Florida, and we have teams around the world - the UK, the Netherlands, Brazil, Argentina, Serbia, Croatia, BIH, Montenegro, North Macedonia, and the Middle East. We are constantly growing, and we would love for you to become part of our team!