Senior Fullstack Developer

Description

Job Summary: We are seeking a Senior Full Stack Developer to support, evolve, and modernize critical systems, with emphasis on stability and continuous improvement. Key Highlights: 1. Support and evolution of critical systems 2. Focus on application stability and continuous improvement 3. Technical autonomy and problem resolution in critical environments **Senior Full Stack Developer** **Contract (PJ) | Hybrid (with focus on in-person work) | Supporting, evolving, and modernizing corporate systems** We are looking for a Senior Full Stack Developer to support and evolve critical systems, directly contributing to operational stability and continuous application improvement. This role requires strong analytical capability, experience with legacy systems, and autonomy to operate in complex scenarios—identifying root causes, proposing technical improvements, and ensuring the reliability of integrations and services supporting the business. **What you’ll tackle in this challenge:** * Supporting and evolving systems built on .NET * Implementing and maintaining corporate APIs and integrations * Advanced code debugging and incident investigation * Fixing failures in system-to-system integrations * Close collaboration with technical and business teams * Participating in prioritization processes and technical discussions * Proposing improvements that increase stability and reduce operational risks * Working in critical environments requiring rapid analysis and technical decision-making * Continuously contributing to application and team process evolution **Technical Requirements:** **Development and Architecture** * .NET Framework and/or .NET Core * C\# * Legacy systems * REST APIs * SOAP * Web Services * System-to-system integrations * Reading and maintaining existing code **Integration and Orchestration** * Orchestrator * Groovy **Databases** * SQL Server * Complex queries * Stored procedures * Database troubleshooting **Support and Quality** * Advanced debugging * Log analysis * Incident investigation and resolution * Root cause identification * Stabilization of production environments **Platforms** * WordPress **Nice-to-Haves:** * Digibee knowledge * Java knowledge * Experience modernizing legacy systems * Experience in highly critical corporate environments * Experience with integration platforms **Profile We’re Seeking:** We seek a candidate with strong technical accountability, autonomy, and the ability to operate in high-availability environments requiring rapid problem resolution. We value professionals who take ownership of delivered solutions, can work under pressure, and independently conduct technical analyses—with constant focus on system stability and evolution. **Other important traits for this role:** * Technical autonomy * Proactive problem solving * Prioritization ability * Strong communication with technical teams and business areas * Organization and commitment * Analytical and investigative thinking * Collaboration and sense of responsibility * Results orientation and continuous improvement **What We Expect from a Senior Profile:** * Autonomy in driving technical analyses and solutions * Ability to stabilize critical environments * Reduction of technical escalations through preventive and corrective action * Effective identification and resolution of root causes * Ability to propose improvements that add business value and increase application reliability **FMX Benefits:** * Wellhub * Starbem * Avus (extendable to up to 4 dependents) * iFood Club * Paid time off as agreed * Monthly performance and results bonus via iFood Benefits **Join FMX:** We connect people, technology, and innovation to build solutions that deliver value. Join a team that believes in continuous learning, collaboration, and professional ownership. Job Type: Full-time, Freelance / PJ Benefits: * Health insurance * Partnerships and commercial discounts * Remote work Experience: * Java 8 (Mandatory) * MySQL database management (Mandatory) * Angular 14 (Mandatory) * JWT (JSON Web Tokens) authentication and authorization management (Mandatory) Work Location: Hybrid remote for São Paulo, SP