**Job Opening: Junior Developer – PJ** Location: Cuiabá – MT (on-site) Contract Type: Individual Contractor (PJ) **Working Hours** \- 40 hours per week (Monday to Friday) \- Schedule: 8:00 AM to 12:00 PM and 1:00 PM to 5:00 PM **Compensation** \- BRL 2,500.00 to BRL 3,000.00 (PJ) **Technologies Used** \- React JS \- Java + Spring Boot \- Python \- PostgreSQL \- AWS **Requirements** \- Programming logic \- Knowledge of at least one programming language \- Familiarity with a framework or library \- Version control using GitHub \- Relational database knowledge (basic level) \- Object-Oriented Programming (OOP) **Responsibilities** \- Assist in API development \- Support web application maintenance and development \- Collaborate with the software development team on projects \- Suggest improvements to optimize solutions **Preferred Qualifications** \- Experience with academic projects, freelance work, or internships \- Strong capacity for continuous learning \- Good communication skills and ability to work effectively in teams \- Willingness to learn new technologies \- Practice of Clean Code \- Familiarity with UI components \- Knowledge of SOLID principles **Selection Process** \- List your technical skills and proficiency level \- List your programming languages and proficiency level \- Typing test (Ratatype) – submit a screenshot showing your result **Commute Time** Submit screenshots (Google Maps) showing commute time for: * **Outbound:** From your residence to Optimus Investimentos. * **Return/Post-Work Destination:** From Optimus Investimentos to your destination after work (e.g., home, university, etc.). **Workplace Address:** \- Optimus Investimentos Eldorado Hill Office Building – Rua I, No. 105, Alvorada neighborhood, Cuiabá – MT, 78048-487 **Project Overview** We are seeking a **Developer** to join our technology team. The selected candidate will play a key role in web application development and maintenance, supporting API creation and evolution, as well as contributing to continuous improvements across our internal systems. We value proactive individuals with rapid learning ability and a collaborative mindset, thriving in a **dynamic and cooperative environment**, where idea exchange and best practices are encouraged daily. The role focuses on **modern technologies** (React, Java with Spring Boot, Python, and PostgreSQL), always aiming to deliver scalable, secure, and efficient solutions that support company growth. Job Type: Full-time, Freelance / PJ Contract Duration: 12 months Compensation: BRL 2,500.00 – BRL 3,000.00 per month Benefits: * Transportation allowance Experience: * React, Java (Spring Boot), Python, or PostgreSQL? (Mandatory)