Job Opening: Mid-to-Senior Full Stack Developer – SaaS Project with AI, Fintech, and B2B Marketplace

Description

Job Summary: We are seeking a Mid-to-Senior Full Stack Developer to technically lead the next phase of an innovative SaaS project incorporating AI, Fintech, and a B2B Marketplace. Key Highlights: 1. Participation in a long-term, high-impact project 2. Agile, collaborative, and non-bureaucratic environment 3. Opportunity for technical and strategic growth Job Opening: Mid-to-Senior Full Stack Developer – SaaS Project with AI, Fintech, and B2B Marketplace Location: Londrina, PR (On-site or Hybrid) About the Project We are building something far greater than a management software. \- Task and project management with high usability \- Artificial Intelligence applied to corporate workflows \- Fintech layer with payments and financial services \- A B2B Marketplace to connect businesses and generate network value If you are passionate about technology and innovation, and want to be part of something transformative for the market, this role is for you. The Challenge The platform already features robust capabilities (Kanban, Gantt, Calendar, Lists). Now, we seek someone to assume technical leadership for the product’s next phase—working side-by-side with the founders to turn an ambitious vision into reality. Your responsibilities include: \- Developing end-to-end features, from backend to frontend \- Translating strategic ideas into clean, scalable, and efficient code \- Participating in solution architecture, ensuring performance and security \- Serving as the technical reference for platform evolution Key expected deliverables: \- Advanced Collaboration: Activity Feed, @mentions, chat, and comments \- \*Engagement: Gamification (ranking/scoring) and time tracking (timesheets) \- Vertical Modules: Construction Site Diary for civil engineering and other sectors \- \*Integrations:\* Google Drive, Calendar, Gmail, and third-party APIs \- Preparation for next steps:\* Fintech (BaaS) and B2B Marketplace Mandatory Requirements \- Residence in Londrina, PR \- Solid experience as a Mid-to-Senior Full Stack Developer \- Experience with relational databases (MySQL, PostgreSQL) \- Practical experience with REST APIs \- Owner mindset: autonomy, proactivity, and solution orientation Preferred Qualifications That Will Set You Apart \- Experience building or scaling a SaaS product \- Experience with AI (e.g., integration with Gemini or OpenAI APIs) \- Knowledge of microservices \- Experience with financial technologies (payment gateways, BaaS) \- Automated testing and strong code quality practices \* What We Offer \- Market-competitive compensation (CLT or PJ, negotiable) \- Participation in a long-term, high-impact project \- Agile, collaborative, and non-bureaucratic environment \- Genuine opportunity for technical and strategic growth How to Apply If you’re based in Londrina and want to join an ambitious and transformative initiative, please send your resume and portfolio. Job Type: Full-time, Permanent CLT Compensation: R$1\.650,02 \- R$3\.000,75 per month Benefits: * Life insurance * Meal allowance * Transportation allowance