Source Job

Poland

  • Develop and enhance new functionality for a web portal automating insurance processes.
  • Design and implement scalable backend services using C#, .NET 8, and Microsoft Azure.
  • Collaborate with distributed teams and participate in technical discussions.

C# .NET Entity Framework Microsoft SQL Server Microsoft Azure

20 jobs similar to Senior/Lead .NET Developer

Jobs ranked by similarity.

Mexico

  • Design, develop, and maintain enterprise-level applications using the Microsoft .NET technology stack.
  • Build and support distributed n-tier applications for reliable and scalable business solutions.
  • Collaborate with cross-functional teams in an Agile Scrum environment to deliver high-quality software.

Helpware develops enterprise-grade business applications for the insurance industry. It fosters a collaborative Agile culture and offers long-term project stability.

  • Design and develop scalable, high-performance .NET applications for travel booking systems.
  • Collaborate with cross-functional teams to drive technical architecture and best practices.
  • Mentor junior engineers and contribute to code reviews and system improvements.

Expedia Group is a travel technology company that powers travel for millions of people worldwide through its portfolio of brands. With a global team of thousands, Expedia fosters a culture of innovation, collaboration, and inclusion.

Global

  • Design, build, and maintain robust C#.NET solutions including Windows Services, WPF/WinForms, and web APIs.
  • Modernize legacy VB scripting, own CI/CD pipelines, and integrate with Azure, Active Directory, and ITSM platforms.
  • Take end-to-end ownership of modules, produce thorough validation evidence, and provide L3 support for tools you own.

Miratech is a global IT services and consulting company that helps visionaries change the world through digital transformation. With over 1000 professionals across 5 continents and 25+ countries, we maintain a values-driven culture of Relentless Performance and over 99% project success rate since 1989.

US

  • Develop and maintain robust software solutions using C#, SQL, and .NET technologies across the full stack.
  • Collaborate with cross-functional teams to design, document, and implement scalable architectures and APIs.
  • Participate in code reviews, debugging, and continuous improvement to ensure high-quality code delivery.

Berkley Medical Management Solutions (BMMS) provides managed-care services for workers' compensation, combining clinical practices and technology to optimize case management. As part of W.R. Berkley Corporation, BMMS focuses on efficient and reliable results through integrated systems and a collaborative culture.

Global

  • Design, develop, test, and deploy .NET solutions for REST APIs and web applications.
  • Work on APIs that support various parts of the business and participate in code reviews.
  • Work on spikes to define new features and help the product team.

Celara is a software company focused on building enterprise restaurant technology. Their technology team is a rapidly growing group of talented engineers in a fast-paced, entrepreneurial environment.

Serbia

  • Participate in design and development of business applications and customizations using .NET, C#, and MS SQL Server.
  • Research and prototype new ERP modules, optimize code, and support existing functionality.
  • Collaborate with development partners on architecture and code reviews while guiding other developers.

Acumatica is a leading innovator in cloud ERP solutions for small and midsized businesses, offering industry-specific applications that manage risk and drive growth. The company was acquired by Vista Equity Partners in 2025 and maintains a collaborative, high-energy culture that values work/life balance and freakishly friendly customer service.

Europe

  • Design, build, and maintain RESTful APIs for distributed multi-tier systems.
  • Apply microservices and SOA principles to design scalable systems and evolve cloud-native architecture.
  • Work with Azure, API management, messaging, and optimize data models using T-SQL.

Exadel is an AI-first global tech company that partners with Fortune 500 clients to deliver AI platforms and digital transformation solutions. With over 2,000 team members and 25+ years of engineering leadership, it fosters a collaborative, ambitious culture.

US

  • Drive development of .NET software products for higher education and government clients, focusing on back-end engineering and code reviews.
  • Collaborate with UX/UI designers and cross-functional teams to integrate functional, technical, and business requirements into scalable software.
  • Write secure, performant, maintainable, and testable code while proactively communicating technical risks to stakeholders.

Blenderbox is a values-based virtual agency that builds websites and applications for mission-driven organizations, primarily nonprofit, educational, and governmental. With over 20 years of experience, our team of subject matter experts across the US values inclusion, transparency, and pride.

US Unlimited PTO

  • Build and evolve AidenBot, the core automation engine for Windows endpoint management.
  • Design, implement, and maintain production software in C# and .NET with focus on reliability.
  • Collaborate on technical architecture and deliver end-to-end product capabilities.

Aiden provides a Windows endpoint management platform that automates IT operations. It is a hyper-growth startup with a culture focused on openness, honesty, and transparency where everyone has an equal voice.

US

  • Lead design and delivery of complex features from ideation to production.
  • Use AI-assisted tools to accelerate delivery while critically validating output.
  • Own and evolve code within your product area, including microservices architecture.

Access Softek builds software for the financial industry, helping banks and credit unions deliver modern digital banking experiences. The company has been in business for over 30 years and works with hundreds of financial institutions across the U.S.

LATAM Africa Eastern Europe

  • Design, develop, and maintain scalable backend applications and services using C# and .NET/.NET Core.
  • Architect and build enterprise-grade RESTful APIs, and lead cloud engineering initiatives within Microsoft Azure.
  • Mentor junior and mid-level engineers, conduct code reviews, and drive engineering best practices.

A technology solutions company that develops and supports cloud-based software applications for a diverse portfolio of customers. They specialize in building scalable, secure, and reliable software using modern cloud technologies, though the team size and culture are not specified.

US

  • Leverage programming skills to design and develop new modules and enhancements while maintaining existing software.
  • Investigate and debug software malfunctions, analyze requirements, and perform code refactoring and optimization.
  • Collaborate with Product, QA, and customer-facing teams using Agile methodologies to deliver reliable, scalable solutions.

Streamline Healthcare Solutions builds web-based software for healthcare organizations to coordinate behavioral health service delivery processes. It is a high growth technology company that has been offering software in the behavioral health marketplace since 2003, fostering a collaborative and flexible work environment.

UK

  • Design, develop, and maintain scalable backend architectures including microservices, APIs, containers, and cloud-based solutions.
  • Lead technical delivery for complex software engineering projects, ensuring high-quality implementation and effective engineering practices.
  • Build and deploy backend solutions using modern frameworks, with a strong focus on C# and .NET technologies.

Our partner is a company building advanced software solutions for global enterprise clients. They operate a remote-first environment with a globally distributed team of highly skilled engineers, valuing autonomy and engineering excellence.

Australia

  • Lead and mentor a team of developers through regular one-on-ones, performance discussions, and career development planning.
  • Remain highly hands-on by designing, developing, testing, and maintaining production-grade software using .NET, C#, and SQL Server.
  • Drive technical decision-making, architecture discussions, and engineering standards by evaluating trade-offs and choosing pragmatic solutions.

Latin America

  • Design and implement features end-to-end using ASP.NET Core Web API (.NET 8) and Angular 16+.
  • Work within a CQRS/Domain-Driven Design architecture with separated command and query sides.
  • Build and optimize SQL Server schemas, stored procedures, and database migrations across multiple databases.

Ubiminds connects Latin American tech professionals with software companies in the US and Canada. With 9 years in the market and GPTW-certified, they support hundreds of professionals in data, design, product, and engineering.

US

  • Design, build, and maintain scalable and secure cloud infrastructure within Microsoft Azure.
  • Lead the migration of SSRS reports to Power BI and modernize WebForms to ASP.NET Core.
  • Provide technical leadership and code reviews for junior developers while managing ATO artifacts.

Blue Water Thinking is a consulting firm that supports federal clients with IT solutions, leveraging military and private sector expertise. Founded by a 28-year Army veteran, the company emphasizes collaboration and customer service, with a team dedicated to government projects.

$120,000–$140,000/yr
US

  • Design, develop, and ship high-quality features across the stack: C#/.NET and SQL Server on the back end, React and TypeScript on the front end.
  • Lead technical design for significant features and third-party integrations, evaluating trade-offs and driving decisions to consensus.
  • Mentor and support other engineers through code review, pairing, and design feedback, raising the team's engineering bar.

CentralReach provides autism and IDD care software for ABA and special education. Trusted by 200,000+ users, we are a recognized best place to work with a culture of impact, inclusion, and flexibility.

Eastern Europe

  • Design, develop, and maintain enterprise applications using ASP.NET, .NET Core, and SQL Server.
  • Build and integrate RESTful APIs, deploy on AWS, and use AI-assisted development tools like GitHub Copilot.
  • Provide L3 support, mentor junior developers, and participate in Agile/Scrum ceremonies.

We are a digital product engineering company that builds products, services, and experiences at scale across all devices and mediums. With 18,000+ experts across 39 countries, our work culture is dynamic and non-hierarchical.

LATAM

  • Develop and maintain full-stack features using C#, .NET, Angular, TypeScript, HTML, and CSS in a Shift Left engineering environment.
  • Take full ownership of unit, integration, and performance testing, and leverage AI-powered tools like GitHub Copilot and Claude to accelerate development.
  • Collaborate closely with Product Owners and engineering teammates in an Agile SCRUM environment to build scalable cloud-based SaaS solutions.

Ubiminds is a GPTW-certified, people-first company that partners with American software product companies to scale their global teams. They connect top LATAM talent with international product companies and provide full employer-of-record support and long-term career development.

$77,000–$141,000/yr
US Unlimited PTO

  • Build and deliver product customizations, integrations, and data pipelines on our cloud insurance platforms.
  • Work end-to-end with Project Managers, Solution Architects, and Business Analysts to scope, design, and implement features.
  • Provide technical troubleshooting and mentor teammates while raising the technical bar.

We empower insurance organizations with configurable, cloud-native insurance software. As the largest cloud-based provider for the P&C market, we are trusted by top carriers, and our culture fosters innovation, teamwork, and continuous learning.