Sr. Fullstack .Net Developer

job summary:

We have an immediate need for a Sr. Fullstack .Net Developer with a strong C#, .Net Core, and React background along with recent project experience in financial services.

location: Telecommute

job type: Contract

salary: $60 - 70 per hour

work hours: 8am to 5pm

education: Bachelors

responsibilities:

Seeking senior C# developer with over 10 years of experience in SDLC to design, build, and

operate customer-facing and internal APIs/services. You'll support the backend development

team at the client, integrate with third-party platforms and enable modern mobile and web

experiences (React).

Key Responsibilities:

• Design, develop, and maintain high-quality, reusable, and reliable C# code for the backend
  
  

and React for the front-end of our disputes platform.

• Collaborate with cross-functional teams to define, design, and ship new features, ensuring
  
  

the technical feasibility of UI/UX designs.

• Develop and integrate with RESTful APIs to connect the front-end components with the
  
  

back-end services and mobile applications.

• Ensure the security and compliance of the platform, particularly in relation to sensitive
  
  

financial data and regulatory requirements.

• Write and maintain comprehensive documentation for the code and systems you develop.
• Participate in all phases of the development lifecycle, from initial concept and design to
  
  

deployment and maintenance.

qualifications:

• C# (Backend)
• Expertise in C# and .NET Core/.NET 6 for building RESTful APIs
• Familiarity with ASP.NET Web API framework
• Knowledge of Entity Framework Core for data access
• React (Frontend)
• Proficiency in React.js and React Native (if mobile UI is involved)
• Strong understanding of component lifecycle, hooks, and state management (e.g., Redux,
  
  

Context API)

• Experience with responsive design and cross-platform compatibility
  
  

- 8 -

Visa Confidential Information

• API Development & Integration
• Designing and implementing secure, scalable RESTful APIs and expose the APIs for their
  
  

mobile applications.

• Experience with API versioning, documentation (e.g., Swagger/OpenAPI), and testing
• Authentication and authorization (e.g., OAuth2, JWT)
  
  

Supporting Skillsets

• Database Management
• SQL Server or other relational databases
• Writing optimized queries and stored procedures
• DevOps & Deployment
• CI/CD pipelines (e.g., GitHub Actions, Azure DevOps)
• Containerization (Docker) and cloud deployment (Azure, AWS)
• Mobile App Integration
• Understanding of how mobile apps consume APIs
  
  

Equal Opportunity Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.

At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact

Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including: medical, prescription, dental, vision, AD&D, and life insurance offerings, short-term disability, and a 401K plan (all benefits are based on eligibility).

This posting is open for thirty (30) days.

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Qualified applicants in San Francisco with criminal histories will be considered for employment in accordance with the San Francisco Fair Chance Ordinance.

Qualified applicants with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act.

We will consider for employment all qualified Applicants, including those with criminal histories, in a manner consistent with the requirements of applicable state and local laws, including the City of Los Angeles' Fair Chance Initiative for Hiring Ordinance.