Mid-level .NET Developer, ASP.NET WebForms

Construmarket

Software Developer maintaining and evolving ASP.NET applications for SaaS product Optimus. Collaborating with various teams to enhance performance and usability of the platform.

Posted 7/11/2026full-timeRemote • 🇧🇷 BrazilMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Proficient in developing and maintaining SaaS applications with a strong focus on .NET / C#, ASP.NET WebForms, and SQL Server. Demonstrates expertise in API integration, performance optimization, and collaborative problem-solving within cross-functional teams.

Highest-signal resume keywords

ASP.NET WebForms Development.NET / C# ProgrammingSQL Server ManagementREST API IntegrationVersion Control with Git / Azure DevOps

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

.NET / C#ASP.NET WebFormsSQL ServerREST APIsHTMLCSSJavaScriptJQueryVersion ControlPerformance Analysis

Soft Skills

AnalyticalCollaborativeOrganizedQuality-Focused

Certifications & Qualifications

Bachelor's Degree in Computer ScienceSoftware EngineeringInformation Systems

Industry Keywords

SaaSFacilities ManagementMaintenanceOperationsEnterprise Systems

Tech Stack

Tools & technologies

ASP.NETAzureJavaScriptjQuery.NETSQL

About the role

Key responsibilities & impact

Develop, enhance and maintain features of the Optimus platform, a SaaS product focused on facilities management, maintenance and operations.
Maintain and evolve web applications built with ASP.NET WebForms.
Develop and maintain backend functionality using .NET / C#.
Support the construction, maintenance and integration of platform APIs and services.
Work on performance, stability, security and usability improvements for the system.
Participate in technical analysis of requests, requirements refinement and solution definition together with Product, QA, Customer Success and Data teams.
Support bug fixes, incident investigations and analysis of production behavior.
Work with relational databases, primarily SQL Server, including queries, stored procedures, adjustments and performance analysis.
Contribute to technical organization, code quality, version control and engineering best practices.
Support the gradual evolution of the platform architecture, considering the context of an operational SaaS product.

Requirements

What you’ll need

Bachelor's degree in Computer Science, Software Engineering, Information Systems or related fields.
Experience developing web applications with .NET / C#.
Hands-on experience with ASP.NET WebForms.
Knowledge of SQL Server, queries, stored procedures, views and relational modeling.
Experience maintaining, evolving and supporting enterprise systems in production.
Knowledge of REST APIs and system integrations.
Familiarity with HTML, CSS, JavaScript and jQuery.
Familiarity with version control, preferably Git / Azure DevOps.
Ability to analyze requirements, propose technical solutions and perform fixes autonomously.
Analytical, collaborative, organized and quality-focused profile.

Benefits

Comp & perks

Meal allowance - credited to Swile card
Home office allowance - credited to Swile card
Health plan - Bradesco (no co-payment)
Dental plan - Bradesco
Life insurance - HDI
Childcare assistance - for parents with children up to 72 months
Partnership with SESC
Totalpass – access to fitness and wellness activities
Birthday Day Off - one additional day off to use during your birthday month