Job Summary: Diagonal seeks a Fullstack Developer to join a web development team, mastering frontend and backend technologies to build scalable and high-performance applications with a focus on social impact. Key Highlights: 1. Work in a web development team, mastering frontend and backend 2. Collaborate with the team to design and implement technical solutions 3. Master and apply best practices and SOLID principles Since 1990, Diagonal has operated as a pioneering consultancy in social management and sustainable development. Our history is marked by innovation, partnerships, and the positive transformation of communities across Brazil and worldwide. Over these 35 years, we have impacted millions of people through projects that combine technical expertise, a human-centered perspective, and socio-environmental commitment. More than delivering solutions, we believe in dialogue, active listening, and collective construction to generate real and lasting change. At Diagonal, we believe every individual journey matters—and that cities and lives can be transformed starting with people. **People are our territory!** **\#JoinDiagonal** **Responsibilities and Duties** **What will be your giant mission?** * Work in a web development team, mastering frontend and backend; * Master scalable, high-performance backend technologies: PHP Laravel and Node.js; * Master frontend technologies such as Svelte.js and React.js; * Perform code testing and debugging to ensure application quality and stability; * Master and apply best practices and SOLID principles; * Optimize application performance by identifying and resolving potential bottlenecks; * Stay up-to-date with best practices and trends in web development and bring improvement suggestions to the team; * Build database routines and reports using PostgreSQL; * Develop highly scalable dynamic features; * Develop solutions (APIs and services) and integrate with third-party APIs; * Collaborate with frontend developers to build user interfaces; * Maximize speed of deployed systems and routines; * Collaborate with the development team to design and implement technical solutions meeting project requirements; * Analyze systems and propose solutions to real-world problems. **Requirements and Qualifications** **To succeed in this mission, you must have:** * Minimum 6 years’ experience in backend development using PHP Laravel and Node.js; * Minimum 6 years’ experience in frontend programming languages, specifically React.js; * Experience with relational databases PostgreSQL and MySQL; * Experience integrating third-party APIs and developing RESTful APIs; * Ability to write clean, readable, and modular code following programming best practices; * Familiarity with version control using Git; * Solid knowledge of MVC architecture and microservices; * Mastery and application of SOLID principles in application development; * Ability to work collaboratively in an agile environment; * Familiarity with Scrum and Kanban methodologies. **Nice-to-have:** * Development and maintenance of mobile applications using Flutter. * Proficiency in Docker configuration. * And most importantly for us: deep appreciation for people! **Additional Information** **Here’s what we offer:** * Employment type: PJ (individual contractor) * Market-competitive remuneration; * Work model: Remote (Home Office) Become part of the Diagonal Social family and together we’ll reach incredible heights! We’re eagerly awaiting your application to join our team of **GIANTS**! Diagonal is a pioneering consultancy in social management, supporting companies, organizations, and governments to elevate their ESG standards and generate positive socio-environmental impact. Through an innovative social management methodology combining interdisciplinary knowledge, a humanized perspective, and social and digital technologies across all project phases—from diagnosis to implementation. **Transforming lives through social change and sustainable territorial development.** **If this purpose resonates with you, join us!** **\#BeDiagonal**