Senior Fullstack Engineer (.NET/React + Umbraco CMS) – Digital Agency

Remote from: LATAM
Annual salary: Undisclosed
Salary information is not provided for this position. Check our Salary Directory to estimate the average compensation for similar roles.
Department: Software Engineering
Employment type: Full Time,
Job posted: 12 Jul 2026
Apply before: 12 Aug 2026
Experience level: Senior
Views / Applies: 26 / 1

About company

About Truelogic

Accelerate Your Digital Transformation

Computer Software
2011

Actively Hiring

AI Summary

Truelogic is hiring a Senior Fullstack Engineer for a digital agency client, focusing on .NET, React, and Umbraco CMS. The role involves building scalable web applications, integrating CMS platforms, and collaborating with cross-functional teams in a fast-paced environment. Candidates need 5+ years of experience, strong backend skills in C# and .NET Core, and frontend expertise in JavaScript/React. Experience with Umbraco CMS is strongly preferred. The position offers remote work from Latin America and the opportunity to work on impactful projects for US companies.

Role DNA

Job Complexity

Easy Hard

Pace & Pressure

Relaxed Fast-paced

Autonomy Level

Guided Full Ownership

Communication Load

Independent Highly Collaborative

AI Insight The role requires senior-level expertise across .NET, React, and CMS integrations, handling multiple client projects simultaneously in a fast-paced agency environment, which elevates the difficulty to a 4 out of 5.

Salary Analysis

AI Insight The salary was not provided, but based on US market data for a Senior Fullstack Engineer with .NET and React skills in an agency setting, the typical range is $100k-$180k. The estimated median is $135,000, which is competitive for the required experience level.

Core Skills Required

.NET Core C# React Umbraco CMS REST APIs SQL Server Git CI/CD JavaScript HTML/CSS

Cover Letter Sample

Dear Hiring Manager,

I am excited to apply for the Senior Fullstack Engineer position at Truelogic. With over 5 years of experience building full-stack applications using .NET, React, and CMS platforms like Umbraco, I am well-equipped to contribute to your client’s digital agency projects. I have a strong track record of delivering scalable, maintainable code in fast-paced, collaborative environments.

In my previous role, I led the development of several enterprise-level web applications, integrating REST APIs and optimizing performance. I am proficient in C#, .NET Core, JavaScript, React, and SQL Server, and I have extensive experience with Umbraco CMS. I thrive in agile teams and am comfortable taking ownership of tasks while communicating effectively across disciplines.

I am particularly drawn to this opportunity because of the chance to work with a U.S.-based digital agency and contribute to impactful projects. I am confident that my technical expertise and passion for clean code will make me a valuable asset to your team.

Thank you for considering my application. I look forward to the possibility of discussing how I can help drive success for Truelogic and its clients.

Sincerely,
[Your Name]

Sample Interview Questions

Describe your experience with .NET Core and how you have used it in building scalable backend services.

I have worked with .NET Core for over 4 years, developing microservices and RESTful APIs. For example, I built a high-traffic e-commerce backend that handled thousands of requests per second, using dependency injection and async programming to ensure performance. I also implemented middleware for logging and authentication.

Can you walk us through your experience integrating Umbraco CMS into a web project?

In my last role, I integrated Umbraco for a client’s marketing website. I set up document types, templates, and used Umbraco's API to pull content into a React frontend. I also customized the backoffice with custom property editors and worked with the Umbraco Forms plugin to handle user submissions.

How do you approach working in a fast-paced agency environment with multiple projects and tight deadlines?

I prioritize tasks based on impact and urgency, and I maintain clear communication with project managers and stakeholders. For example, I use Agile methodologies and daily stand-ups to sync with the team. I also set realistic expectations and proactively flag any blockers to ensure timely delivery without sacrificing quality.

Explain your experience with frontend development using React and how you ensure maintainable code.

I have extensive experience with React, including hooks, state management with Redux, and component-based architecture. I follow best practices like using TypeScript for type safety, writing unit tests with Jest, and adhering to a consistent naming convention. I also review pull requests to enforce code quality and maintainability.

How do you stay updated with the latest technologies and tools in software development?

I regularly read tech blogs, follow industry leaders on LinkedIn, and participate in online courses on platforms like Pluralsight. I also experiment with new tools in side projects, such as AI-assisted development tools to enhance productivity. Staying current helps me bring innovative solutions to projects.

About Truelogic

At Truelogic we are a leading provider of nearshore staff augmentation services headquartered in New York. For over two decades, we’ve been delivering top-tier technology solutions to companies of all sizes, from innovative startups to industry leaders, helping them achieve their digital transformation goals.

Our team of 600+ highly skilled tech professionals, based in Latin America, drives digital disruption by partnering with U.S. companies on their most impactful projects. Whether collaborating with Fortune 500 giants or scaling startups, we deliver results that make a difference.

By applying for this position, you’re taking the first step in joining a dynamic team that values your expertise and aspirations. We aim to align your skills with opportunities that foster exceptional career growth and success while contributing to transformative projects that shape the future.

Our Client

Our client is a digital agency focused on delivering scalable, high-quality web solutions for enterprise organizations. The company specializes in modern web development, CMS implementations, and digital experience platforms, partnering with cross-functional teams of engineers, designers, strategists, and producers to build impactful digital products. Their engineering culture emphasizes collaboration, code quality, maintainable architectures, and successful delivery in fast-paced client environments.

Job Summary

We are looking for a Senior Full-stack Engineer to contribute to multiple client-facing web projects, building and maintaining scalable applications using .NET technologies and modern frontend frameworks. This role is ideal for an engineer who enjoys working across the stack, developing backend services and frontend experiences, integrating CMS-driven solutions, collaborating with multidisciplinary teams, and delivering high-quality technical implementations in a fast-paced agency environment.

Responsibilities

Design, develop, and maintain full-stack web application features across multiple client projects.
Build scalable backend services using C# and .NET Core.
Develop responsive and maintainable frontend applications using JavaScript and React or Angular.
Integrate CMS platforms, APIs, and third-party services to support content-driven digital experiences.
Participate in technical architecture discussions and contribute to technical decision-making.
Conduct and participate in code reviews to maintain engineering quality standards.
Collaborate closely with designers, strategists, producers, and fellow engineers throughout the development lifecycle.
Ensure code quality through testing, performance optimization, and adherence to development best practices.
Work independently while proactively communicating progress, risks, blockers, and recommendations.
Maintain technical documentation and support continuous improvement initiatives across projects.

Qualifications and Job Requirements

5+ years of experience as a developer
Strong professional experience with C# and .NET Core.
Strong frontend development experience with JavaScript and React (Angular experience is also acceptable).
Strong HTML, CSS, and JavaScript fundamentals.
Experience building and consuming REST APIs.
Experience integrating CMS platforms, with Umbraco experience strongly preferred.
Experience working with Microsoft SQL Server.
Experience using Git and CI/CD workflows.
Ability to work independently with minimal supervision and manage priorities effectively.
Advanced English communication skills, both written and verbal.

Nice to Have

Recent hands-on experience with Umbraco CMS.
Familiarity with Node.js.
Experience using AI-assisted development tools as part of the software development workflow.
Experience optimizing web performance, page speed, and frontend user experience.
Experience building reusable frontend component libraries or design system implementations.
Experience working with AWS cloud services.
Previous experience in digital agencies or fast-paced client delivery environments.
Knowledge of accessibility standards and responsive design best practices.
Participation in architecture discussions and technical design decisions.
Strong ownership mindset with the ability to drive work from requirements through delivery.

What We Offer

100% Remote Work: Enjoy the freedom to work from the location that helps you thrive. All it takes is a laptop and a reliable internet connection.
Highly Competitive USD Pay: Earn an excellent, market-leading compensation in USD, that goes beyond typical market offerings.
Paid Time Off: We value your well-being. Our paid time off policies ensure you have the chance to unwind and recharge when needed.
Work with Autonomy: Enjoy the freedom to manage your time as long as the work gets done. Focus on results, not the clock.
Work with Top American Companies: Grow your expertise working on innovative, high-impact projects with Industry-Leading U.S. Companies.

Why You’ll Like Working Here

A Culture That Values You: We prioritize well-being and work-life balance, offering engagement activities and fostering dynamic teams to ensure you thrive both personally and professionally.
Diverse, Global Network: Connect with over 600 professionals in 25+ countries, expand your network, and collaborate with a multicultural team from Latin America.
Team Up with Skilled Professionals: Join forces with senior talent. All of our team members are seasoned experts, ensuring you’re working with the best in your field.

Apply now!

Apply now >