Oowlish

Senior Full Stack Engineer (.NET Core 8 / React)

Posted 12 Days Ago

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6 Locations

In-Office or Remote

Senior level

Software

The Role

Looking for a Full Stack Developer to modernize and scale a SaaS ecosystem, focusing on back-end with .NET Core 8 and supporting front-end features using React. Responsible for maintaining legacy codebases and optimizing databases.

Summary Generated by Built In

Join Our Team

Oowlish, one of Latin America's rapidly expanding software development companies, is seeking experienced technology professionals to enhance our diverse and vibrant team.

As a valued member of Oowlish, you will collaborate with premier clients from the United States and Europe, contributing to pioneering digital solutions. Our commitment to creating a nurturing work environment is recognized by our certification as a Great Place to Work, where you will have opportunities for professional development, growth, and a chance to make a significant international impact.

We offer the convenience of remote work, allowing you to craft a work-life balance that suits your personal and professional needs. We're looking for candidates who are passionate about technology, proficient in English, and excited to engage in remote collaboration for a worldwide presence.

About the Role:

We are looking for a Full Stack Developer with a strong Back-End focus to support the evolution of a large-scale SaaS ecosystem that powers cultural, educational, and streaming platforms. This role is centered on modernizing and scaling a mature, long-lived codebase, ensuring performance, reliability, and interoperability across multiple devices and platforms.

You will work within a complex, multi-tenant environment that supports web, mobile, and Smart TV experiences, contributing to the gradual transition from legacy technologies to a modern, scalable architecture. This is a hands-on technical role, ideal for someone who enjoys solving real-world problems in systems that are actively used by thousands of users.

We are seeking a strong individual contributor who is comfortable navigating legacy systems while building forward-looking solutions.

Back-End (Primary Focus)

Develop, maintain, and evolve REST APIs using .NET Core 8
Work with Entity Framework and background workers
Maintain and improve legacy .NET Framework codebases
Optimize SQL Server (Azure) performance and queries
Implement and manage caching strategies (Redis)

Front-End (Support Role)

Maintain existing JavaScript and jQuery code
Contribute to new features using React
Support applications built with WebForms, MVC, and Classic ASP

Infrastructure & Platform Support

Work with Azure cloud services
Maintain and improve CI/CD pipelines
Support a multi-platform, multi-tenant (white-label) SaaS environment

Must-Have:

Strong experience with .NET Core 8 and modern .NET technologies
Hands-on experience working with legacy .NET Framework systems
Strong knowledge of SQL Server
Experience with Entity Framework
Experience implementing Redis caching
Proficiency with JavaScript and jQuery
Experience with React
Experience working in Azure environments and CI/CD pipelines

Nice to Have:

Experience working with long-evolving legacy systems
Exposure to multi-tenant or white-label SaaS architectures
Performance and scalability optimization in complex systems
Experience with content, media, or streaming platforms
Background in B2B or B2G SaaS environments

Benefits & Perks:

Home office;

Competitive compensation based on experience;

Career plans to allow for extensive growth in the company;

International Projects;

Oowlish English Program (Technical and Conversational);

Oowlish Fitness with Total Pass;

Games and Competitions;

You can also apply here:

Website: https://www.oowlish.com/work-with-us/

LinkedIn: https://www.linkedin.com/company/oowlish/jobs/

Instagram: https://www.instagram.com/oowlishtechnology/

Top Skills

.Net Core 8

Azure Cloud Services

Entity Framework

JavaScript

Jquery

React

Redis

SQL Server

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The Company

106 Employees

Year Founded: 2017

What We Do

We are on a mission to give every company, no matter the size, the opportunity to innovate and help build a better future. Our Services: Dedicated Tech (full/partial) Squads: we create multi-disciplinary, remote (near-shore) Tech Squads that become part of your team. They adapt to your workflows and are trained on Agile methodologies to deliver continuous value. We believe that well-trained remote teams bring clients the opportunity to increase innovation output by accessing a greater / more diverse pool of talent, while reducing the cost of development. On-Demand Software Development: at our core, we are software developers excited about building digital products and solutions using the latest technologies and agile methodologies. We provide end-to-end capabilities to deliver on your technical requests. Product Management, Tech Architecture, Front / Back End Development, Devops & QA Venture Building: we partner with companies to co-launch new digital businesses that leverage core assets of the company (distribution channels, customer base, industry knowledge, proprietary technology, etc). We take the co-created ideas into MLP’s (Most Lovable Product) aiming to find product market fit and scale in the leanest possible way. As startup founders ourselves, we love getting things from 0 to 1. We are End-To-End Innovation Enablers, helping your company unlock it's full innovation potential.