Senior Full-Stack Engineer (.NET / ASP.NET) – Technology

About Truelogic

Truelogic is a leading provider of nearshore staff augmentation services, headquartered in New York. For over two decades, we have 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 over 600 highly skilled tech professionals, based in Latin America, drives digital disruption by partnering with U.S. companies on their most impactful projects.

By applying for this position, you are taking the first step toward 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 leading B2B digital marketing agency.

About the Role

We are seeking a Senior Full-Stack Engineer to join our team. This is a critical individual contributor role responsible for building, extending, and maintaining a secure, enterprise-grade web platform and APIs. The role requires a highly skilled developer who can deeply understand, respect, and execute within an established reference architecture, specifically a Domain-Driven Design (DDD) and Onion/Hexagonal hybrid architecture. A major focus will be executing critical third-party financial workflows, heavily dictated by a J.P. Morgan Chase API integration.

Key Responsibilities

• Build and maintain .NET 10 Web APIs using clean dependency injection and asynchronous programming.
• Strictly follow pre-existing DDD and Onion/Hexagonal hybrid architectures and SOLID principles to keep the codebase decoupled.
• Handle complex SQL Server transactions, optimize queries, and maintain versioned API contracts via OpenAPI/Swashbuckle.
• Maintain and optimize read-heavy Razor Views, View Components, and Partials.
• Utilize Tailwind CSS, HTMX, or Alpine.js for clean, responsive UI layouts.
• Enforce traditional web patterns like POST-Redirect-GET (PRG) and antiforgery tokens for secure form submissions.
• Own secure API integrations with enterprise payment ecosystems (e.g., J.P. Morgan Chase, Stripe, Square).
• Implement strict application-level security, ensuring Personally Identifiable Information (PII) and financial data (credit card numbers) are never exposed or logged.
• Safely consume cloud configurations and credentials managed via Azure Key Vault and App Services.
• Write comprehensive unit, integration, and contract tests using MSTest/NUnit and Playwright.
• Operate successfully as a solo individual contributor within an Azure DevOps (Agile/Kanban) framework.

Requirements

• 8+ years in software development, with 5+ years dedicated to .NET Core / ASP.NET Core (Web API & MVC Razor).
• Strong proficiency with .NET 10 and C# 14 (Async, DI).
• Proven expertise working within established DDD, Onion, or Hexagonal patterns.
• Hands-on integration experience with major financial APIs (e.g., J.P. Morgan Chase, Stripe, Square).
• Deep understanding of Server-Side Rendering (SSR), the HTTP lifecycle, antiforgery tokens, and the POST-Redirect-GET (PRG) pattern.
• Strict adherence to application-level security, ensuring PII and credit card data are never exposed or logged.
• Strong SQL Server transaction optimization paired with Azure configuration management (App Services, APIM, Key Vault).
• Proven ability to operate autonomously as a solo individual contributor within Azure DevOps (Agile/Kanban).

What We Offer

• 100% Remote Work: Enjoy the freedom to work from the location that helps you thrive. All you need is a laptop and a reliable internet connection.
• Highly Competitive USD Pay: Earn excellent, market-leading compensation in USD, exceeding typical market offerings.
• Paid Time Off: Our paid time off policies ensure you have the chance to unwind and recharge.
• Work with Autonomy: Manage your time effectively, focusing on results rather than the clock.
• Work with Top American Companies: Grow your expertise 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.
• Diverse, Global Network: Connect with over 600 professionals in 25+ countries and collaborate with a multicultural team from Latin America.
• Team Up with Skilled Professionals: Join forces with seasoned experts in your field.