Full Stack Engineer, React/.NET

Guardian Life

Senior Software Engineer responsible for the architectural design and implementation of Guardian's web self-service platforms and APIs. Collaborating with technical teams and business experts in a hybrid work environment.

Posted 5/21/2026full-timeHolmdel • New Jersey, New York, Pennsylvania • 🇺🇸 United StatesMid-LevelSenior💰 $95,170 - $156,355 per yearWebsite

Tech Stack

Tools & technologies

AWSDockerJavaScriptJestKubernetes.NETNext.jsReactSDLCSOAPSplunkSQLTypeScript

About the role

Key responsibilities & impact

Design, develop, and deploy high-volume, high-usage self-service web portals and APIs, utilizing .Net Core, C#, React, Next.js, and responsive CSS.
Collaborate with Technical Teams, Technical Manager, Project Manager and subject matter experts from businesses and work closely with SMEs to understand, plan and implement.
Ensure compliance with security, privacy, legal, infrastructure, and administrative/corporate processes and policies.
Lead code reviews and administer paired programming.
Provide unique insight into the analysis of customer business requirements that may cross multiple functional areas and/or multiple technical platforms and understand the broad strategic implications.
Act independently and as part of a team to translate business and technical requirements into well-engineered, tested, and deployed applications.
Jump in and hit the ground running with a positive attitude.

Requirements

What you’ll need

5+ years of experience successfully developing APIs using C#, .NET Core, and building modern web applications using React and Next.js.
Strong .NET & C# expertise on backend services with async programming and memory management.
Strong proficiency in front-end development with React, Next.js, JavaScript/TypeScript, HTML5, and responsive CSS (Flexbox, Grid, media queries).
Experienced in object-oriented programming and design patterns.
Experience building responsive, cross-browser compatible user interfaces.
5+ years working with Web API (.NET core), REST Services, WCF or SOAP Services.
4+ years of experience developing and maintaining front-end applications using React and/or Next.js.
4+ years of experience in database principles, such as SQL.
Working experience with Splunk (logging), AppDynamics, JSON/XML, Caching, Performance Analysis & Profiling.
Experience resolving code smells, vulnerabilities, and application security flaws.
Experience with front-end testing frameworks and tools (e.g., Jest, React Testing Library) is a plus.
Experience with source code repositories tools, BitBucket, GitHub.
Professional experience with CI/CD pipelines, AWS, ECS, Docker and Kubernetes.
Ability to interact and communicate successfully with business partners and technology teams.
Strong knowledge of release/build/configuration management practices.
Strong understanding of software best-practices as it applies to web and business application development with hands on architecture design and development experience required in building APIs and front-end applications for large scale platforms.
Demonstrable understanding of object-oriented design/development, functional programming, service-oriented architecture, and modern front-end frameworks.
Ability to prioritize and manage work, adhering to critical and aggressive project timelines in a fast-paced environment.
Extensive experience in Software Development Life Cycle Management using Kanban, Scrum, or Scaled Agile is required.
Experience working in a rapid and agile development environment with frequent deliveries.
Passion for building seamless user experiences and collaborating across the stack.

Benefits

Comp & perks

opportunities to build communities and grow your career
diverse colleagues with high ethical standards

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

.NET CoreC#ReactNext.jsJavaScriptTypeScriptHTML5SQLREST Servicesobject-oriented programming

Soft Skills

collaborationcommunicationproblem-solvingtime managementpositive attitudeindependenceteamworkprioritizationadaptabilityinsight analysis