Principal Full Stack - .NET / Angular v18+ AI-First Development
Confirmed on the employer's own hiring board on Oct 17, 2026. First seen by Alion on Jul 2, 2026.
About the Role
Ready to take the next step in your international career? We can support you!
Ubiminds is a GPTW-certified, people-first company that partners with American software product companies to scale their global teams. We connect top LATAM talent with international product companies while providing full employer-of-record support and long-term career development.
In this opportunity, you will join a product engineering team building a next-generation, cloud-native SaaS platform from the ground up. You'll work alongside architects, product managers, designers, and engineers to deliver scalable, secure, and high-performance software while embracing AI-first development practices that accelerate delivery and improve engineering quality.
The Challenge
We are looking for a Principal Full Stack Engineer who combines deep technical expertise with hands-on software development and technical leadership.
This is a high-impact role where you'll own features end-to-end, define architecture, mentor engineers, and establish engineering best practices across the organization. You'll help shape modern, AI-assisted software development workflows, leveraging tools like GitHub Copilot, Cursor, and Claude Code to deliver production-ready solutions in a fast-paced, shift-left engineering environment.
Key Responsibilities
Architecture & Technical Design: Collaborate with Architects to define application architecture, validate technical approaches via PoCs, and design solutions using patterns like DDD, CQRS, Event-Driven Architecture, BFF, and API Gateways.
Full Stack Development: Design, build, and deliver scalable SaaS applications using .NET, Angular (18+), SQL Server/PostgreSQL, and AWS.
Frontend & Backend Excellence: Develop modern Angular applications using standalone components, Signals, RxJS, and Reactive Forms. Build robust backend services, optimize data models, and tune database performance.
AI Integration: Leverage AI-assisted development tools (e.g., GitHub Copilot, Cursor, Claude Code) to generate production-ready code and optimize engineering workflows.
End-to-End Ownership: Own features end-to-end-from domain modeling to deployment, observability, and production support.
Troubleshooting & Reliability: Diagnose complex production issues, conduct root-cause analyses, and continuously improve system reliability.
Leadership & Mentorship: Guide and mentor engineers through technical discussions, code reviews, architecture alignment, and knowledge-sharing sessions.
Requirements & Qualifications
Mandatory Skills
Experience: 10+ years of professional software engineering experience, including proven tenure in a Principal, Lead, or equivalent technical leadership role.
Core Tech Stack: Expert proficiency in C#, .NET, Entity Framework, Angular, and relational databases (SQL Server/PostgreSQL).
Architecture: Strong expertise in DDD, CQRS, REST APIs, Event-Driven Architecture, and distributed systems.
SaaS & Performance: Demonstrated experience designing secure, scalable, multi-tenant SaaS platforms, along with SQL optimization, Redis, and OpenSearch/Elasticsearch.
DevOps & Quality: Practical experience with automated testing, CI/CD, Git, Agile methodologies, observability/monitoring tools, and static code analysis (e.g., SonarQube, Mend).
AI Tooling: Hands-on experience using AI coding assistants (GitHub Copilot, Cursor, Claude Code, or similar).
Soft Skills & Education: Advanced/fluent English communication skills; Bachelor's degree in Computer Science, Engineering, or equivalent practical experience.
Nice to Have
Hands-on experience with AWS cloud services (ECS/Fargate, Lambda, SQS/SNS, S3, RDS) and IaC (Terraform or AWS CDK).
Familiarity with GraphQL, WebSockets, or Server-Sent Events (SSE).
Exposure to modern testing frameworks like Playwright or SmartBear TestComplete.
Experience with observability platforms (Datadog, CloudWatch, New Relic).
Experience building AI-enabled applications (LLMs, RAG, Model Context Protocol / MCP).
Team & Work Environment
Product-focused organization building a next-gen SaaS platform from scratch.
Collaborative environment alongside Architects, Product Managers, UX Designers, and Engineers.
Strong culture focused on technical excellence, ownership, autonomy, and mentorship.
AI-first engineering practices embedded directly into the software development lifecycle.
About Ubiminds
Our Core Values
People First: We are all about people!
Challenge Yourself: There’s always room for improvement; continuous growth is in our essence.
Make It Happen: Be ready to embrace challenges with the right attitude and commitment.
We’re In This Together: We work, thrive, and evolve as a team.
Averaging on Awesome: We work hard to deliver high quality and exceed expectations.
Keep It Real: Transparency, honesty, and openness in every situation.
Perks & Benefits
Direct placement with a US product-based company with full parity treatment.
Full back-office support from Ubiminds (career guidance, HR, concierge services).
Remote-first policy with a company-provided MacBook.
Access to growth opportunities: Tech talks, chapter meetings, and team happy hours.
Free English lessons with native speakers.
Candidate Referral Program.
Optional access to our Florianópolis office (equipped with snacks, games, and weekly massages).
Recruitment Process
Tech Recruiter Interview: A quick chat to discuss the role, company culture, and your experience.
Client Assessment: Technical and cultural fit evaluations with the partner team.
Offer Letter
AI Disclaimer: