Senior Full Stack Software Engineer - .Net/React (452)

Ubiminds

Remote Remote permanent

Posted: January 21, 2026

Required Skills

Job Description

Want to get to 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 development footprint. Ubi custom-curates Brazilian top 5% talent for their LATAM strategy, offering a unique combo of staff augmentation and employer-of-record services.

Ubiminds is assisting a company that is transforming the way organizations discover, engage, and hire the best talent. Connecting companies and candidates anytime, anywhere, end-to-end hiring platform features video interviewing, assessments, and conversational AI. As an industry leader in science-backed, modern hiring solutions powered by ethical AI, they have hosted more than 70 million video interviews and 200 million chat-based candidate engagements for over 1,200 pioneering customers around the globe.

Apply now! This is a unique opportunity for you to not only accelerate your international career but also work in a groundbreaking company.

Challenge
We’re seeking a Senior Full Stack Engineer to focus on backend systems with .NET Core and contribute to frontend development with React/TypeScript. You’ll help ensure platform stability and performance, while gradually delivering new features and maintaining a legacy system.

What you’ll do

Design, implement, and maintain services using .NET Core / C#
Build and enhance front-end features with React, TypeScript
Write and maintain automated tests to ensure reliability
Collaborate in architectural discussions and code reviews
Work on reducing tech debt and improving legacy systems over time

Must-Haves

Frontend: React, JavaScript, HTML, CSS
Backend: .NET Core / C# (+5 years) , REST APIs, microservices architecture
Database: Relational DBs, Entity Framework Core
Cloud: Experience with AWS, Azure, or GCP
Comfortable working with Git workflows and reading/writing technical documentation in English

Nice-to-Have

Experience with: Docker, Kubernetes, xUnit, NUnit, Jest, Cypress
Familiarity with observability and monitoring tools
Experience in legacy system modernization
Understanding of secure coding practices
Extra backend skills in Python/Django, GraphQL, PostgreSQL

Perks and Benefits

As a Senior Full Stack Software Engineer @Ubiminds, you:
• Are placed in a product-based company, with the same treatment as their full-time employees.
• Have our full back-office support, from career guidance to HR and concierge services.
• Enjoy our remote-first policy – we are a distributed team, after all.
• Get your own MacBook (none of that "bring your own device" stuff here).
• Have access to growth opportunities with other amazing technology professionals, through tech talks, chapter meetings, and even remote happy hours for tons of fun!
• Improve your English through free lessons with a native English speaker - get to the next level on your communication skills!
• Candidate Referral bonus (promote Ubi to your tech friends, and get paid for it!)
• Miss working in the office? Our cool Florianópolis headquarters is available, whenever you want, with weekly quick massages & tasty snacks, soft drinks, and games

How our process works
• Interview with Tech Recruiter (specific chat about the job opening)
• Client process (including technical challenges and on-demand assessments)
• Offer

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