Senior Developer | Ruby on Rails

Description

Job Summary: We are looking for a challenge-driven individual, passionate about solving complex problems, who enjoys working in a team within a dynamic environment. Key Highlights: 1. Actively participate in design and architecture discussions 2. Implement and maintain backend code focused on security and performance 3. Collaborate with the team to refine tickets and plan deliveries **Who Are We Looking For?** A challenge-driven individual who enjoys teamwork, is passionate about solving complex problems, and thrives in a dynamic environment. Does this sound like you?! Then this opportunity is for you! Responsibilities and Duties **Key Challenges:** * Actively participate in design and architecture discussions for new features and integrations with partners (acquirers, gateways, CERC, banks); * Implement and maintain backend code (and frontend, depending on the challenge) with a focus on security, performance, maintainability, and best practices; * Conduct code reviews and propose improvements to existing codebases; * Write and maintain automated tests (unit, integration, mocks/contracts) to ensure feature reliability; * Work with asynchronous processing, messaging/queues, reprocessing, and fault tolerance; * Develop and maintain RESTful APIs as well as external integrations, data transformations, formats, and protocols; * Diagnose and resolve bugs, incidents, and performance bottlenecks; * Collaborate with the team (PO, Tech Lead, DevOps) to refine tickets, estimate effort, and plan deliveries; * Contribute to process improvements, coding standards, automations, and engineering culture; * Assist in system monitoring, alerting, and observability (logs, metrics, tracing); * Document architectural decisions, critical flows, and APIs/contracts when necessary. **Requirements and Qualifications** **What You Must Know:** * Experience as a Ruby on Rails developer; * Experience with relational databases (PostgreSQL, MySQL or similar), advanced SQL, transactions, indexes, and query tuning; * Experience with distributed architectures / microservices / segregated services; * Experience with queues / messaging / asynchronous processing (e.g., Redis, Sidekiq, RabbitMQ, Kafka, etc.); * Knowledge and hands-on experience with RESTful APIs, versioning, error handling, contracts, and authentication (token, OAuth, etc.); * Experience with Docker and containers, isolated development environments; * Strong test automation culture (unit, integration, mocks); * Ability to debug production issues, analyze logs, and monitor performance; * Technical English proficiency for reading documentation, libraries, and external APIs. **What May Boost Your Application:** * Experience in billing, credit, receivables, or fintechs; * Knowledge of receivables registration processes (e.g., CERC or similar); * Experience with caching / Redis / Memcached / TTL and caching strategies; * Practical experience with event sourcing, CQRS, or event-driven architectures; * Experience with cloud / infrastructure / CI\-CD / DevOps (e.g., AWS, GCP, Kubernetes); * Experience with monitoring, metrics, and tracing (Prometheus, Grafana, Jaeger, ELK, etc.); * Knowledge of API security, cryptography, and compliance (LGPD, PCI\-DSS); * Experience with database versioning and complex migrations; * Participation in architectural decisions and technical standard definition. **What You’ll Find at iugu** **Hybrid Work Model:** Our work model is hybrid — 3 days onsite and 2 days remote — with flexible hours, respecting each team’s specific needs. **Flexible Benefits:** Swile card credit of R$ 1\.689,59 distributed as follows: **Meal and Food Allowance:** R$ 772,99\. **Mobility Allowance:** R$ 408,60 for commuting, usable across all categories (Uber, 99, public transport card top-up, parking, etc.). Additionally, an extra R$ 508,00, usable flexibly for meal, food, or mobility — whichever suits you best. **Bradesco Health and Dental Plan:** We offer comprehensive health solutions for your well-being. **TotalPass:** A platform offering over 250 workout options across thousands of affiliated gyms. **Vittude:** Book psychological counseling sessions with your preferred professional, with a 40% discount on all sessions. **Life Insurance:** Solutions designed to help you better handle daily challenges. **Breakfast:** Served daily to kickstart our iuguers’ day. **Fruits:** Available daily in the office. **Mini-Market:** Convenient snacks, ready meals, and beverages catering to all tastes. **Childcare Assistance:** For moms and dads. **Extended Maternity Leave:** 180 days. **Extended Parental Leave:** 30 days. **Short-Term Incentive:** Based on goal achievement and individual performance evaluation. **Birthday Day Off:** Take time off during your birthday month. **iu\+go:** A biannual performance management program, including PDI follow-up. **iugu Academy:** A learning environment created by iugu itself! Through it, you’ll access regulatory content and role-specific learning paths. **Partnerships:** Collaborations with outstanding educational institutions — such as language schools and universities (exclusive discounts for iuguers and dependents). **Other Perks:** * A relaxed workplace atmosphere, fostering teamwork and talent; * Autonomy to work, develop, and implement ideas; * An environment that values continuous feedback and regular 1:1 meetings. *Diversity matters here! We value differences — racial, ethnic, religious, gender and gender identity, national origin, sexual orientation, age — believing diverse perspectives and viewpoints are vital for sharing ideas.* **\#Joiniugu** Job Type: Full-time CLT Selection Question(s): * Are you available to work in a hybrid model — 3 days/week onsite (Brooklin/SP) and 2 days/week remote? * Please specify your salary expectation (do not respond “to be negotiated”); * Where was your most relevant Ruby on Rails experience? Work Location: Hybrid remote work based in Brooklin, SP