Full Stack Developer

Description

Job Summary: We are seeking a Full Stack Developer to work across the entire lifecycle of technological solutions in the financial market, ensuring conception, development, maintenance, and innovation. Key Highlights: 1. Build end-to-end solutions and scalable systems 2. Collaborate strategically and promote technical excellence 3. Share knowledge and evolve with autonomy **Description:** Build more than a career. Build a legacy. At One, we believe that developing a professional trajectory goes far beyond holding a position—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 ecosystem of financial solutions, recognized for our technical capability and for caring about what truly matters: people. This recognition is possible only because we have talents by our side who believe in their work and dedicate themselves daily to growing alongside us. Our environment is guided 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 shaping our relationships and sustaining the path we are building. Working at One means having the opportunity to participate in something greater, contributing consistently and purposefully to a journey that leaves a mark. It means being challenged to evolve—with support, autonomy, and clarity regarding the impact of each decision. If you seek a place where your trajectory is respected, developed, and propelled responsibly, One is the right place. Here, we believe that durability, transparency, and dedication are how we build a lasting future—for our talents, for our clients, and for everything we choose to build together. 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 start their career in the financial market. Your mission will be to ensure the complete lifecycle of One Investimentos’ technological solutions—from conception through maintenance. Responsibilities: **Develop end-to-end solutions:** Design, develop, and test robust applications, working both on back-end and front-end, and ensuring continuous integration and delivery (CI/CD) and production monitoring. Build scalable systems: Design 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 such as clean code, automated testing (TDD/BDD), and documentation. Share knowledge: Actively contribute to the team’s technical evolution by sharing knowledge and mentoring other developers. **Main Requirements:** **Proven Experience:** Solid experience (6+ years) developing complex, robust end-to-end applications. Back-End Proficiency: 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 and Testing Culture: Deep understanding of testing methodologies (TDD, BDD) and ability to write clean, organized, and well-documented code. (Vitest, Jest, Playwright, etc.) Collaboration and Communication: Exceptional communication skills to operate 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