Senior Software Developer - US Citizens Only

Valid8 Financial, Inc.; Sterling (VA); On-site; USD 100,000 - 130,000; Full time

Job summary

Valid8 Financial, Inc. is looking for a Senior Software Developer to join their team in Sterling, Virginia. The role involves designing and developing IT solutions for federal and commercial clients focusing on React for front-end development and ASP.NET for back-end applications.

Applicants must demonstrate 10+ years of experience in relevant technologies, including C#, SQL Server, and MongoDB. The position requires strong problem-solving skills and a collaborative spirit to work effectively within the team.

Qualifications

• 10+ years of experience with ReactJS, including functional and class components.
• Proficient in C# and experience with ASP.NET for web application development.
• Strong knowledge of SQL Server and NoSQL databases like MongoDB.

Responsibilities

• Design, develop and maintain IT solutions through applications and systems.
• Collaborate in the project's entire lifecycle to ensure technology meets customer needs.
• Contribute to technical and project management details.

Skills

React Web Development

ASP.NET Core or ASP.NET MVC

C# programming

SQL Server

MongoDB

CI/CD pipelines using Azure DevOps

Git

Infrastructure as Code (IaC)

Neo4j

Strong problem-solving skills

Job description

Applicants must be a U.S. Citizen. All applicants must have an active clearance or be able to attain a clearance. If an applicant cannot support these requirements in addition to the items below, they will not be considered for the role.

i3solutions is seeking a Senior Software Developer to work as a member of our software development team supporting our federal and commercial clients. The Senior Software Developer collaborates in designing, developing, modifying, implementing, and maintaining IT solutions through new and existing applications, systems, databases, and application infrastructure. They are responsible for the most critical activities on a development project to ensure projects are technologically sound and meet the needs of the customer. They contribute to every stage of the project lifecycle and maintain responsibility for the technical and project management details.

Required Technical Skills (10+ years minimum)

• React Web Development
  • Expertise in developing user interfaces using ReactJS, including functional and class components.
  • Strong understanding of modern JavaScript (ES6+), JSX, and state management libraries (e.g., Redux or Context API).
  • Experience with responsive design, component libraries (e.g., Material-UI, Ant Design), and CSS-in-JS solutions (e.g., styled-components).
  • Familiarity with React Router and integrating APIs using tools like Axios or Fetch.
  • Knowledge of performance optimization techniques (e.g., lazy loading, code splitting)
• Experience with ASP.NET Core or ASP.NET MVC for building scalable, secure web applications.
• Proficiency in C# programming and understanding of RESTful API development.
• Familiarity with Razor Pages, Blazor, or other modern .NET front-end frameworks.
• Experience with Entity Framework (EF) for data access and ORM.
• Knowledge of building and consuming Web APIs, gRPC, or SignalR for real-time applications.
• SQL Server
  • Proficiency in writing efficient SQL queries, stored procedures, and triggers.
  • Experience with database design, normalization, and indexing to optimize performance.
  • Familiarity with SQL Server Management Studio (SSMS) and tools like Azure Data Studio.
  • Understanding of database security, backups, and recovery strategies.
  • Ability to work with large datasets and complex joins.
• MongoDB
  • Experience with NoSQL databases and document-based data modeling in MongoDB.
  • Proficiency in creating, querying, and managing MongoDB collections.
  • Knowledge of performance tuning, indexing, and replication in MongoDB.
  • Familiarity with using MongoDB Atlas for cloud-hosted database solutions.
  • Experience integrating MongoDB with Node.js or .NET applications.
• Experience with setting up CI/CD pipelines using Azure DevOps for build and deployment automation.
• Familiarity with source control (Git) and branching strategies (e.g., GitFlow).
• Knowledge of creating and managing Azure Boards for task tracking and sprint planning.
• Hands‑on experience with Infrastructure as Code (IaC) using tools like Bicep, Terraform, or ARM templates.
• Understanding of Azure Repos, Azure Artifacts, and release management
• Neo4j
  • Familiarity with graph database concepts and Cypher query language.
  • Understanding of use cases for graph databases, such as social networks, recommendation systems, and relationship modeling.
  • Experience integrating Neo4j with backend applications using official drivers (e.g., for .NET, JavaScript, or Python)
• Soft Skills
  • Strong problem‑solving skills and ability to work collaboratively in a team environment.
  • Excellent communication skills for interacting with stakeholders and other developers.
  • Adaptability to work in agile or scrum development environments