Apply for the Full Stack Engineer role at First Advantage. Engineer high-volume, secure background screening platforms using C#, .NET, Razor Pages, Azure, SQL Server, and GitHub CI/CD pipelines.

About the Company: First Advantage

First Advantage (Nasdaq: FA) is a leading global provider of mission-critical background screening, identity verification, and workforce compliance solutions. Providing cutting-edge software suites to some of the most recognised Fortune 100 and Global 500 brands, First Advantage processes millions of secure data points every year to help international corporations mitigate risk and accelerate hiring pipelines.

The Core Product Engineering Division at First Advantage builds and maintains high-volume, security-sensitive applications, including fingerprinting networks and background screening registries. Operating within an agile technology transformation framework, this team focuses on scaling cloud-native architectures, embedding automated quality assurance, and implementing secure coding practices to ensure maximum platform availability, data encryption, and a best-in-class user experience.

About the Role: Full Stack Engineer

Are you a security-minded .NET developer who excels at building scalable web features, optimising relational databases, and designing secure APIs? First Advantage is hiring a full-time, permanent Full Stack Engineer to join its global core product squad. This execution-focused role is tailored for engineers bringing 3 to 5 years of hands-on experience developing with C# and the .NET ecosystem within multi-tiered, high-volume environments.

🔒 Critical Security & Compliance Mandate: Due to strict federal compliance and security screening regulations for fingerprinting and background systems, all personnel must be United States Citizens who meet specific residency rules (e.g., residing in the US for 3 of the past 5 years or working overseas in a federal/military capacity). Candidates must also undergo an extended background evaluation to secure an LAR (Local Access Review) certification.

As a Full Stack Engineer, you will manage the complete software development lifecycle (SDLC) for high-impact screening tools. Your work will span the full stack—from engineering front-end components using Razor Pages to writing robust backend logic via C# / .NET RESTful APIs. You will optimize data storage within Microsoft SQL Server, write automated testing sequences using Playwright, and manage cloud-native code delivery via Azure and GitHub Actions. This role is ideal for an independent researcher who is comfortable with evolving requirements and is curious about leveraging AI tools to drive software development efficiencies.

Key Responsibilities & Full Stack Software Workflows

• Full Stack Feature Engineering: Architect, implement, and maintain scalable full-stack features and product enhancements using C#, .NET, and Razor Pages.

• Secure API Architecture: Design, build, and optimize secure RESTful APIs, utilizing JSON and XML data formats to handle sensitive identity verification traffic.

• Database Programming: Write efficient SQL queries, relational data models, and complex stored procedures inside Microsoft SQL Server to manage high-volume transactional logs.

• Automated Quality Assurance: Author and maintain automated end-to-end testing suites using Playwright, while verifying API integrations through Postman.

• Cloud Architecture & Deployments: Contribute to secure and compliant cloud deployments utilizing Azure web services and cloud infrastructure standards.

• CI/CD Pipeline Optimization: Manage repository branch strategies and automated deployment pipelines utilizing GitHub and GitHub Actions.

• System Diagnostics & Support: Support production releases, identify platform performance bottlenecks, and methodically troubleshoot live application errors.

• R&D and AI Integration: Independently research emerging technologies, frameworks, and domain topics while remaining open to using AI tools to optimize coding workflows.

Candidate Prerequisites & Key Technical Skills

Successful candidates must combine a strong grasp of object-oriented design patterns with a meticulous approach to data security and software compliance.

Required Experience & Technical Baseline:

• US Citizenship & Residency: Must be a United States Citizen with a history of residing in the US for 3 of the past 5 years (or overseas federal/military equivalents), and capable of passing additional background checks to secure an LAR certification.

• Professional Tenure: 3 to 5 years of hands-on experience developing production software with C# and .NET.

• Web Architecture: Direct experience building web applications using Razor Pages or equivalent server-rendered web frameworks.

• Relational Databases: 3 to 5 years of experience writing data access logic and queries within Microsoft SQL Server.

• API Development: Practical mastery of RESTful API design, service communication standards, and troubleshooting using Postman.

• Testing Automation: Hands-on experience developing automated test frameworks using Playwright or similar automation libraries.

• Source Control & CI/CD: Practical working knowledge of GitHub repository management and continuous integration pipelines via GitHub Actions.

Preferred Qualifications (Nice-to-Have):

• NoSQL Database Systems: Exposure to unstructured database architectures like CosmosDB or MongoDB.

• Design Patterns: Deep familiarity with architectural design frameworks such as MVC (Model-View-Controller) or MVVM (Model-View-ViewModel).

• Development Ecosystems: Advanced comfort navigating Microsoft Visual Studio and VS Code.

Core Position Specifications

• Position Title: Full Stack Engineer

• Hiring Organisation: First Advantage

• Corporate Compensation: Approx. $90,000 – $110,000 base annually (plus competitive benefits package)

• Experience Allotment: 3 – 5 Years of core industry tenure

• Employment Framework: Full-Time, Permanent corporate assignment

• Compliance Clearance: US Citizenship + LAR Certification Required

• Industry Placement: Workforce Compliance / Identity Verification / Cloud Security

• Functional Department: Core Product Engineering & Quality Assurance