Full Stack Developer

Description

Job Summary: We are seeking a mid-level Full Stack Developer to work across the entire lifecycle of technological solutions within an expanding financial ecosystem, with a focus on end-to-end development and strategic collaboration. Key Highlights: 1. Opportunity to start a career in the financial market 2. Develop robust end-to-end solutions (back-end and front-end) 3. Contribute to the team’s technical evolution and share knowledge **Description:** Build more than a career. Build a legacy. At One, we believe that building a professional trajectory goes far beyond holding a job title. It means being part of a solid story with a forward-looking vision and non-negotiable values guiding every decision. We are a rapidly expanding financial solutions ecosystem, recognized for our technical capability and for caring about what truly matters: people. This recognition is only possible because we have talents by our side who believe in their work and dedicate themselves daily to growing alongside us. Our environment is shaped by a culture that, in practice, values transparent communication, long-term focus, humility, problem-solving ability, and hard work. These are not just principles—they are commitments that shape our relationships and sustain the path we are building together. Working at One means having the opportunity to participate in something bigger—to contribute consistently and purposefully to a journey that leaves a mark. It means being challenged to evolve, with support, autonomy, and clarity about the impact of every decision. If you seek a place where your professional journey is respected, developed, and responsibly accelerated, One is the right place. Here, we believe that lasting futures for our talents, our clients, and everything we choose to build together are forged through solidity, transparency, and dedication. We have a new opportunity! **Position:** Full Stack Developer Work Locations: Nova Lima What We Are Looking For: We are looking for a mid-level professional to work as a full stack developer—a perfect opportunity for those wishing to begin their career in the financial market. Your mission will be to ensure the complete lifecycle of One Investimentos’ technological solutions, from conception through to maintenance. Responsibilities: **Develop end-to-end solutions:** Design, develop, and test robust applications, working both on the back-end and front-end, while ensuring continuous integration and delivery (CI/CD) and production monitoring. Build scalable systems: Create architectures and develop systems that are scalable, resilient, and secure to support business growth. Collaborate strategically: Work closely with business and product teams to understand challenges and propose high-impact technological solutions. Promote technical excellence: Implement and disseminate best practices—including clean code, automated testing (TDD/BDD), and documentation. Share knowledge: Actively contribute to the team’s technical growth by sharing knowledge and mentoring other developers. **Main Requirements:** **Proven Experience:** Solid experience (6+ years) developing complex, robust applications end-to-end. Back-end Proficiency: Strong expertise in Node.js and its modern frameworks (e.g., NestJS, Fastify, Express) for building high-performance APIs. Front-end Proficiency: Advanced experience with React and its ecosystem (e.g., Next.js, Vite), building optimized interfaces. Relational Databases: In-depth knowledge of PostgreSQL, including data modeling, query optimization, and maintenance. Ownership Mindset: Practical experience managing the full software lifecycle, including CI/CD automation (e.g., GitHub Actions) and deployment strategies. Cloud Experience: Hands-on experience developing and maintaining applications in cloud environments (AWS and similar). Quality & Testing Culture: Deep understanding of testing methodologies (TDD, BDD) and ability to write clean, organized, and well-documented code (Vitest, Jest, Playwright, etc.). Collaboration & Communication: Exceptional communication skills to work effectively in an agile and collaborative environment. Version Control: Mastery of Git and workflows such as Git Flow. **Nice-to-Haves:** Python knowledge applied to data or automation. Familiarity with observability practices (Prometheus, Grafana, etc.). Experience in the financial sector (fintechs, banks, brokerages). Experience with Infrastructure-as-Code (IaC). Portfolio featuring personal projects or contributions to open-source communities. 2512100202181912386