Frontend Developer

Valiant Technologies LLC; City of Utica (NY); On-site; USD 90,000 - 120,000; Full time

Job summary

Valiant Technologies LLC in Utica, NY seeks a Frontend Developer skilled in React.js, Angular, and .NET Core to build and maintain responsive web applications. You will collaborate with backend, product, design, and QA to deliver secure, accessible software with strong performance.

You’ll translate designs from Figma, develop components and design systems, and ensure quality through testing and code reviews while adhering to SOLID, DI, and modern frontend patterns.

Qualifications

• Experience building responsive web applications using modern frontend frameworks.
• Strong understanding of RESTful API integration and authentication.
• Familiarity with design systems and component libraries.
• Proficiency with HTML5, CSS3, and accessible UI practices.
• Experience with unit testing and test automation.

Responsibilities

• Design, develop, and maintain responsive web applications using React.js and Angular.
• Build reusable UI components and scalable frontend architectures.
• Develop and maintain component libraries and design systems.
• Translate Figma designs and wireframes into functional user interfaces.
• Develop and integrate RESTful APIs using .NET Core and ASP.NET Core.
• Implement secure authentication and authorization using JWT and OAuth 2.0.
• Apply asynchronous programming, Dependency Injection, and SOLID principles.
• Collaborate with backend teams to ensure seamless application integration.
• Implement state management using Redux, NgRx, RxJS, and Flux architecture.
• Develop scalable and reusable frontend components.
• Optimize application performance and responsiveness.

Skills

React.js

Angular

.NET Core

RESTful APIs

JWT/OAuth 2.0

State management

ASP.NET Core

UI components

Design systems

Tools

Redux

NgRx

RxJS

Entity Framework

Dapper

Jest

Job description

We are seeking a skilled Frontend Developer with strong expertise in React.js, Angular, and .NET Core to design, develop, enhance, and maintain responsive web applications.

The candidate will collaborate with backend developers, product managers, designers, and QA engineers to deliver high-quality applications while ensuring performance, security, accessibility, and a seamless user experience.

Key Responsibilities:

1. Frontend Development:

• Design, develop, and maintain responsive web applications using React.js and Angular.


• Build reusable UI components and scalable frontend architectures.


• Develop and maintain component libraries and design systems.


• Translate Figma designs and wireframes into functional user interfaces.


• Develop and integrate RESTful APIs using .NET Core and ASP.NET Core.


• Implement secure authentication and authorization using JWT and OAuth 2.0.


• Apply asynchronous programming, Dependency Injection, and SOLID principles.


• Collaborate with backend teams to ensure seamless application integration.


• Implement state management using Redux, NgRx, RxJS, and Flux architecture.


• Develop scalable and reusable frontend components.


• Optimize application performance and responsiveness.

4. Database Management:

• Work with Microsoft SQL Server 2019/2022.


• Develop and optimize SQL queries and stored procedures.


• Utilize ADO.NET, Entity Framework, EF Core, and Dapper.


• Perform database performance tuning and ensure data integrity.

5. Testing & Quality Assurance:

• Perform unit testing and test automation.


• Utilize Jest, React Testing Library, Jasmine, Karma, xUnit, NUnit, or MSTest as applicable.


• Maintain code quality and improve test coverage.


• Conduct UI/UX benchmarking and troubleshoot application issues.

6. Accessibility & User Experience:

• Implement WCAG 2.1 AA accessibility standards.


• Develop accessible interfaces using semantic HTML and ARIA.


• Ensure keyboard navigation and screen-reader compatibility.


• Perform accessibility testing and improve overall usability.


• Work closely with product managers, designers, backend developers, and QA engineers.


• Participate in code reviews and technical discussions.


• Contribute to continuous improvement of development practices.

Required Skills & Qualifications:

Frontend Technologies:

• Strong hands-on experience with React.js.


• Experience with Angular.js / Angular.


• Strong knowledge of HTML5, CSS3, and responsive web design.


• Experience with RxJS, Redux, NgRx, and Flux architecture.


• Expertise in reusable component development and component libraries.


• Experience implementing UI/UX designs from Figma and wireframes.


• Experience with .NET Core / ASP.NET Core.


• Strong knowledge of RESTful API development and integration.


• Understanding of JWT authentication and OAuth 2.0.


• Knowledge of API security, Async/Await, Dependency Injection, and SOLID principles.

Database Technologies:

• Experience with SQL Server 2019/2022.


• Knowledge of ADO.NET, Entity Framework, EF Core, and Dapper.


• Strong SQL query development, stored procedures, and performance tuning skills.

Testing Technologies:

• Experience with unit testing and test automation.


• Familiarity with Jest, React Testing Library, Jasmine, Karma, xUnit, NUnit, or MSTest, depending on the technology stack.

Accessibility Standards:

• Strong understanding of WCAG 2.1 AA.


• Experience with semantic HTML, ARIA, keyboard navigation, and screen-reader compatibility.


• Knowledge of accessibility testing practices.


• Only genuine candidates with verifiable project experience.


• Strong React.js and .NET Core experience is highly preferred.


• Candidate must be willing to work onsite in Utica, NY, three days per week.


• Candidate must be available for the final face-to-face interview.


• Please submit only candidates who are comfortable with the onsite requirement.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.