Lead Full Stack Engineer (.NET + Angular)

Medellín - Colombia

Monthly Salary: Not Disclosed

Posted on: 09-11-2025

Vacancies: 1 Vacancy

Job Summary

We are seeking an experienced Lead Full Stack Engineer to join a high-impact strategic technology initiative. Our mission is to evolve a core business application for a market-leading enterprise proactively transforming the platform into a secure maintainable and high-performance architecture.

As the teams technical pillar you will be responsible for guiding the hands-on transformation of a legacy stack (.NET Framework 4.5.2 Angular 6) into a modern decoupled API-driven architecture building the foundation for future innovation and scale.

What Youll Do:

Lead the hands-on architecture and development for the complete modernization of a flagship business application.
Guide the backend migration from the Framework 4.5.2 10. This includes replacing the OWIN-based hosting infrastructure with native Core middleware and refactoring code to remove dependencies (e.g. HttpContext Session).
Spearhead the complex frontend migration from Angular 6 to Angular 20. You will manage an incremental version-by-version approach to mitigate risk addressing numerous breaking changes and updating third-party libraries.
Collaborate with the Solution Architect to implement and enforce a strict API-first decoupled architecture ensuring a clean separation between the new SPA frontend and 10 backend.
Address and resolve critical dependency challenges replacing dozens of incompatible NuGet packages (e.g. ) and outdated JavaScript libraries.
Work closely with the DevOps Engineer to build and optimize multi-stage CI/CD pipelines in Azure DevOps using YAML.
Mentor and guide the teams Senior and Middle engineers establishing best practices and ensuring code quality within the new architecture.
Partner with the QA team to support the creation of the manual regression test suite and validate functionality during continuous in-sprint testing phases.

What Were Looking For:

Extensive senior-level software engineering experience with a proven track record of leading complex technical modernization projects.
Deep mastery of ecosystem including experience with both Framework 4.x (particularly ) and Core / .NET 10.
Expert-level Angular skills specifically with demonstrable experience in complex migrations across multiple major versions (e.g. migrating from Angular 6 or similar).
Experience architecting and migrating monolithic (tightly-coupled) applications to decoupled API-driven Single Page Application (SPA) architectures.
Solid hands-on experience with Azure DevOps particularly building and managing YAML-based CI/CD pipelines.
Proven experience with MySQL including upgrading data access drivers (e.g. from to ) and refactoring data access logic.
Familiarity with the challenges of replacing components like OWIN and .
Strong communication and collaboration skills to work effectively with multidisciplinary technical teams (DevOps QA DBAs) and manage project dependencies.
Exceptional command of written and spoken English.

Why Join Us

Take the primary technical leadership role in a critical high-impact modernization project.
Solve complex technical challenges spanning deep framework migrations and a complete architectural transformation.
Work with a dedicated multidisciplinary team of architects engineers and QA specialists focused on a clear objective.
See the direct results of your work as you transform a core application into a modern secure and high-performance platform.
Be part of a quality first company multiple options for getting new education and certifications.

We offer*:

Flexible working format - remote office-based or flexible
A competitive salary and good compensation package
Personalized career growth
Professional development tools (mentorship program tech talks and trainings centers of excellence and more)
Active tech communities with regular knowledge sharing
Education reimbursement
Memorable anniversary presents
Corporate events and team buildings
Other location-specific benefits

*not applicable for freelancers

What Youll Do:

Lead the hands-on architecture and development for the complete modernization of a flagship business application.
Guide the backend migration from the Framework 4.5.2 10. This includes replacing the OWIN-based hosting infrastructure with native Core middleware and refactoring code to remove dependencies (e.g. HttpContext Session).
Spearhead the complex frontend migration from Angular 6 to Angular 20. You will manage an incremental version-by-version approach to mitigate risk addressing numerous breaking changes and updating third-party libraries.
Collaborate with the Solution Architect to implement and enforce a strict API-first decoupled architecture ensuring a clean separation between the new SPA frontend and 10 backend.
Address and resolve critical dependency challenges replacing dozens of incompatible NuGet packages (e.g. ) and outdated JavaScript libraries.
Work closely with the DevOps Engineer to build and optimize multi-stage CI/CD pipelines in Azure DevOps using YAML.
Mentor and guide the teams Senior and Middle engineers establishing best practices and ensuring code quality within the new architecture.
Partner with the QA team to support the creation of the manual regression test suite and validate functionality during continuous in-sprint testing phases.

What Were Looking For:

Extensive senior-level software engineering experience with a proven track record of leading complex technical modernization projects.
Deep mastery of ecosystem including experience with both Framework 4.x (particularly ) and Core / .NET 10.
Expert-level Angular skills specifically with demonstrable experience in complex migrations across multiple major versions (e.g. migrating from Angular 6 or similar).
Experience architecting and migrating monolithic (tightly-coupled) applications to decoupled API-driven Single Page Application (SPA) architectures.
Solid hands-on experience with Azure DevOps particularly building and managing YAML-based CI/CD pipelines.
Proven experience with MySQL including upgrading data access drivers (e.g. from to ) and refactoring data access logic.
Familiarity with the challenges of replacing components like OWIN and .
Strong communication and collaboration skills to work effectively with multidisciplinary technical teams (DevOps QA DBAs) and manage project dependencies.
Exceptional command of written and spoken English.

Why Join Us

Take the primary technical leadership role in a critical high-impact modernization project.
Solve complex technical challenges spanning deep framework migrations and a complete architectural transformation.
Work with a dedicated multidisciplinary team of architects engineers and QA specialists focused on a clear objective.
See the direct results of your work as you transform a core application into a modern secure and high-performance platform.
Be part of a quality first company multiple options for getting new education and certifications.

We offer*:

Flexible working format - remote office-based or flexible
A competitive salary and good compensation package
Personalized career growth
Professional development tools (mentorship program tech talks and trainings centers of excellence and more)
Active tech communities with regular knowledge sharing
Education reimbursement
Memorable anniversary presents
Corporate events and team buildings
Other location-specific benefits

*not applicable for freelancers