Senior Full Stack Engineer

Fixity Technologies; New York (NY); On-site; USD 140,000 - 200,000; Full time

Job summary

Fixity Technologies in New York is seeking a Senior Full Stack Engineer to modernize enterprise systems using .NET 8, C#, ASP.NET Core and Angular 17+. You will migrate legacy data from Ingres to SQL Server and collaborate with SMEs to preserve critical business rules.

The role emphasizes AI-assisted development, CI/CD pipelines with Azure DevOps, and strong design capabilities in a dynamic, regulated environment.

Qualifications

• 8+ years of software development experience.
• Strong expertise in Angular 17+ and TypeScript.
• Experience with RxJS and Angular Signals.
• Solid SQL Server and T-SQL skills.
• Proficient in Entity Framework Core and REST APIs.
• Hands-on CI/CD and automated testing practices.
• Knowledge of system design, DDD, and modernization strategies.
• Experience using AI-assisted development tools with disciplined code review.

Responsibilities

• Design and develop modern applications using .NET 8, C#, ASP.NET Core, Angular 17+, and SQL Server.
• Modernize legacy applications while preserving complex business rules.
• Migrate data and schemas from Ingres to SQL Server ensuring integrity.
• Analyze legacy code with SMEs to rebuild business functionality.
• Leverage AI-assisted tools for coding, testing, and documentation.

Skills

Angular 17+

TypeScript

RxJS & Angular Signals

SQL Server

T-SQL

Entity Framework Core

REST APIs

CI/CD

Automated Testing

DDD (Domain-Driven Design)

Modernization

AI-powered development tools

Tools

GitHub Copilot

Azure DevOps

OpenROAD

PowerBuilder

VB.NET

VB6

Oracle Forms

Ingres Database

Job description

Senior Full Stack Engineer (.NET 8 + Angular)

Exciting opportunity for experienced Senior Full Stack Engineers! Work on modernizing enterprise systems with .NET 8, Angular 17+, SQL Server, and Azure DevOps while making a real impact on business-critical applications. In NYC, be part of the transformation!

Key Responsibilities

• Design and develop modern applications using .NET 8, C#, ASP.NET Core, Angular 17+, and SQL Server.
• Modernize legacy applications while accurately preserving complex business rules.
• Migrate data and schemas from Ingres to SQL Server, ensuring data integrity and reconciliation.
• Analyze legacy source code and collaborate with SMEs to rebuild business functionality.
• Utilize AI-assisted development tools (GitHub Copilot, Claude Code, or similar) for coding, testing, documentation, and analysis.
• Implement CI/CD pipelines and deployment strategies using Azure DevOps.
• Participate in architecture discussions, code reviews, technical documentation, and production support planning.
• Work closely with business stakeholders to gather requirements and reduce migration risks.

Required Skills

• 8+ years of software development experience.
• Strong expertise in:
• Angular 17+
• TypeScript
• RxJS & Angular Signals
• SQL Server & T-SQL
• Entity Framework Core
• REST APIs
• CI/CD
• Experience with automated testing and production-ready engineering practices.
• Strong understanding of system design, Domain-Driven Design (DDD), and modernization strategies.
• Experience using AI-powered development tools with disciplined code review and validation.

Nice to Have

• Experience with legacy technologies such as:
• VB.NET
• VB6
• OpenROAD
• PowerBuilder
• Oracle Forms
• Ingres Database
• Experience in utility, energy, or highly regulated industries.
• Familiarity with Strangler Fig and Anti-Corruption Layer migration patterns.

Ideal Candidate

We're looking for someone who:

• Enjoys solving complex technical challenges.
• Can confidently work with both legacy and modern technology stacks.
• Writes clean, maintainable, and well-tested code.
• Has strong communication and collaboration skills.
• Thrives in AI-assisted software development while maintaining high engineering standards.