Source Job

$93,750–$120,000/yr
Canada

  • Ship full-stack features that meet quality, performance, and UX standards from the first milestones of the new web app.
  • Collaborate closely with Product and Design to translate user needs into simple, well-crafted experiences.
  • Integrate Microsoft APIs (Graph, Azure AD, MSAL) securely and help shape the team's technical choices.

C# .NET React TypeScript

20 jobs similar to Senior Fullstack Developer (C#/React)

Jobs ranked by similarity.

Global

  • You will develop new system components and modify existing ones for the client's digital window.
  • You will write high quality code, take ownership of tasks, and drive delivery.
  • You will engage with the delivery team, scrutinize solutions, and curate technical documentation.

Software Mind develops solutions that make an impact for companies around the globe. The company culture embraces openness, respect, and combines employment with enjoyment.

LATAM

  • Develop and maintain scalable applications using C#/.NET and React, primarily on AWS or Azure PaaS.
  • Design technical architectures, microservices, APIs, and event-driven solutions for distributed systems.
  • Mentor engineers and collaborate with distributed teams to deliver high-performing, secure solutions.

The company builds scalable B2B SaaS solutions for global clients. It is a fully remote organization with a culture centered on autonomy, flexibility, and inclusion.

  • Design, develop, and maintain scalable full-stack applications using React, .NET, and C#.
  • Build and deploy serverless services using AWS Lambda and other cloud technologies.
  • Collaborate with product and engineering teams to deliver reliable, production-grade web applications.

The company is a technology partner that builds scalable, cloud-based applications for modern businesses. The engineering team is collaborative and focused on modern practices, with a remote-first culture.

Portugal

  • Design and implement scalable .NET services and REST APIs that power commerce and payment capabilities for LastPass customers worldwide.
  • Deliver payment gateway integrations and regional payment method support, expanding reach and reliability for LastPass subscribers.
  • Contribute to planning, design, and feature delivery in close collaboration with a cross-functional engineering team.

LastPass delivers Secure Access Essentials, helping individuals and organizations manage and protect access to AI, applications, and credentials. Trusted by more than 100,000 businesses and millions of users worldwide, it blends strong security with everyday simplicity.

$100,000–$140,000/yr
US

  • Build workflow-focused product features across React, TypeScript, REST APIs, and relational data access.
  • Own scoped features from clarification through implementation, testing, release, and production follow-up.
  • Contribute to C#/.NET and EF Core backend code while deepening your knowledge of the stack.

We are an established software company serving county and city governments, transforming Windows-based applications into a modern SaaS suite. Our engineering organization supports both established products and next-generation platform development.

Portugal Brazil

  • Design, develop, and maintain high-quality applications using C# and the Microsoft technology stack.
  • Build and integrate RESTful APIs and develop front-end applications using React.
  • Contribute throughout the full development lifecycle within Agile/Scrum teams.

TXP is a software company that works on internal and customer-facing digital projects. They emphasize a collegial environment with shared responsibility and a culture of learning from mistakes.

US

  • Develop high-quality web software using C#, .NET, React, and Microsoft SQL Server.
  • Collaborate with stakeholders to design and implement secure integration solutions.
  • Participate in agile processes, perform code reviews, and write unit tests.

CareDx is a leading precision medicine diagnostics company advancing care in transplant, specialty oncology, and cell therapy. The company partners with healthcare providers and biopharma organizations, with a culture focused on innovation and improving patient outcomes.

India

  • Design and develop event-driven microservices and APIs using .NET Core and C#.
  • Build full-stack applications with React and .NET on Azure services.
  • Mentor junior developers and promote engineering best practices.

Jobgether is an AI-powered job matching platform that connects candidates with hiring companies. It operates as a partner for job postings, managing applications and using technology to streamline the recruitment process.

Latam

  • Collaborate on design and development of responsive healthcare web applications using React and C#.
  • Develop server-side logic and integrate third-party APIs to enhance functionality.
  • Ensure security and privacy of healthcare data through best practices.

Software Mind is a team of engineers that ramps up projects for top-notch companies. The company is multicultural, constantly growing, and certified by Great Place To Work with an excellent work environment.

US

  • Design, develop, test, and ship production-grade software across backend services and front-end applications.
  • Build and operate cloud-native solutions in AWS with a focus on reliability, scalability, and performance.
  • Develop and maintain backend services primarily in .NET/C# and contribute to front-end development with React.

TREND Health Partners is a tech-enabled payment integrity company facilitating collaboration between payers and providers to reduce waste and improve healthcare access. It is a dynamic, growing organization that promotes a collaborative and innovative work environment.

$145,000–$175,000/yr
US

  • Build rich user experiences using Vue.js and TypeScript, from prototype to production.
  • Design and implement new features and endpoints in our C#/.NET backend APIs.
  • Own features end to end as part of a cross-functional squad, using AI coding tools as a primary part of your workflow.

We build the operating system for private markets, enabling wealth advisors and their clients to access and manage private market investments. We support 350+ advisory firms and 1,500+ GP relationships, with a culture of meritocracy, continuous improvement, and AI-first engineering.

$120,164–$158,617/yr
US 3w PTO

  • You will adhere to WelbeHealth Agile DevOps processes for requirements capture, architecture, design, construction, quality assurance, and deployment.
  • You will ensure features provide security and data integrity for PCI and HIPAA compliance, and participate in requirements discovery with end users.
  • You will perform peer coding and design reviews, develop design patterns, and re-engineer legacy applications using Microsoft tech stack.

WelbeHealth serves our communities' most vulnerable seniors through shared intention, pioneering spirit, and the courage to love. We are a growing healthcare organization that values our team members and offers competitive benefits.

$135,900–$153,000/yr
US

  • Lead a distributed engineering team to design, review, and build well-crafted software for government partners.
  • Collaborate with stakeholders to architect and deploy new systems while improving existing ones using C#/.NET and Azure.
  • Automate development, testing, and production workflows, and participate in an on-call rotation for production support.

Nava is a consultancy and public benefit corporation that makes government services simple and effective through human-centered design and modern engineering. Since 2015, they've helped federal, state, and local agencies modernize technology, with a team that values meaningful, impactful work for the public good.

US

  • Design, develop, and maintain scalable full-stack applications using C#, .NET, and ASP.NET.
  • Build and enhance cloud-based solutions using Microsoft Azure.
  • Collaborate with technical and business stakeholders to understand requirements and deliver solutions.

Our client is an IT company specializing in enabling digital transformation for enterprises and technology providers by delivering seamless customer experiences, business efficiency, and actionable insights. The company's size and culture are not specified.

Brazil

  • Define and evolve the architecture for a suite of .NET Core services and web apps, aligning them with frontends built in React, Angular, and Vue.
  • Ensure scalability, security, and reliability across distributed systems, and lead modernization efforts including cloud-native patterns and CI/CD practices.
  • Engage with demanding clients to manage expectations, navigate ambiguity, and negotiate technical trade-offs for win–win solutions.

CI&T helps large enterprises transform the potential of AI into real business impact with AI Deployment, AI-native execution, and tech-integrated business solutions. With 30 years of experience and 8,000 employees across more than 25 countries, they collaborate to build solutions with real impact.

India

  • Develop and maintain web services and microservices using C#, .NET Core, Entity Framework, and SQL Server.
  • Build and enhance cloud solutions on Azure, including ETL processes and data modeling for financial applications.
  • Integrate third-party APIs, write clean code following SOLID principles, and develop automated tests for software quality.

Jobgether is an AI-powered job matching platform that connects candidates with hiring companies. It operates as a remote-first company with a focus on efficient and fair recruitment processes.

Pakistan

  • Develop backend software using C# and solve performance/scalability challenges.
  • Work with cross-functional teams to define and deliver projects, contributing to architecture planning.
  • Provide 2nd and 3rd line technical support and mentor other team members.

Smart Working helps great people build long-term, full-time remote careers with exceptional UK teams. They are a high-rated company with a culture focused on belonging and growth.

$170,000–$190,000/yr
US

  • Lead technical direction for the Solstice platform and define engineering standards.
  • Architect and build full stack applications using React, TypeScript, Node.js, C#/.NET, and AWS.
  • Mentor engineers and drive initiatives to improve system performance and developer experience.

NetDocuments provides a cloud-based document management platform for legal professionals, featuring AI-powered context graph technology. The company is consistently recognized as a top workplace and fosters a collaborative, inclusive culture.

Ukraine

  • Design, code, test, and debug back-end and front-end code, including web services and Angular components.
  • Collaborate with product owners, business analysts, and architects, and participate in Scrum activities.
  • Provide support for resolving customer cases and ensure faultless system operation.

Creatio is an AI CRM and workflow platform that helps midsize and large organizations run customer workflows, serving thousands of customers in over 100 countries. Headquartered in Boston, MA, with a global team, Creatio has been recognized as a Leader by top industry analysts and named to Inc.'s Best Workplaces list in 2025.

Global

  • Design, build, and maintain robust C#.NET solutions including Windows Services, WPF/WinForms, and server-side components using ASP.NET and Azure.
  • Modernize legacy scripts and implement REST/RPC APIs with CI/CD pipelines, AI coding assistants, and end-to-end deployment ownership.
  • Lead requirement sessions, produce design documents, and provide L3 engineering support for owned modules following Agile methodologies.

Miratech is a global IT services and consulting company that helps visionaries change the world by supporting digital transformation for large enterprises. With nearly 1000 full-time professionals and a values-driven culture of Relentless Performance, they have maintained over 99% project success rate since 1989.