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Senior Full Stack JS Engineer at NineTwoThree AI Studio. Why Join Us?. 🔹 100% remote | 🌎 Global team | ⏳ Full-time. Join a stable, long-term project that's been in continuous development for 5+ years. The project offers consistent, meaningful work on a mature financial services platform.. Project overview:. It is a comprehensive financial services platform built for an established insurance and financial services company. The platform handles:. - Insurance products (motor, life, property, major medical). - Loan management (vehicle, personal, mortgage, commercial). - Investment and annuity products. - Digital client services and employee benefits. - Real-time financial transactions and reporting. - AI document processing. This is a production system processing real transactions for real customers, with established business processes and regulatory compliance requirements.. Why This Position is Different?. ✅. Stable, Long-term Project: . Same project for 5+ years, deep domain expertise. ✅ Mature Codebase: . Well-structured, documented, with established patterns. ✅ Real Business Impact: . Your code affects real financial transactions and client services. ✅ Technical Variety: . Polyglot architecture (Node.js + Python/Django), multiple services. ✅ Professional Growth: . Become an expert in financial services technology. What You'll Do:. Work on a mature financial platform with real business requirements:. - Maintain and enhance banking/lending features, payment processing, and compliance workflows. - Work across our polyglot microservices architecture (Node.js/TypeScript and Python/Django). - Implement complex business logic for insurance products, loan origination, and investment services. - Build real-time data processing systems using WebSockets and event-driven patterns. - Integrate with third-party services (DocuSign, payment gateways, banking APIs). - Full-stack development from REST APIs to React frontends. - Ensure transaction integrity and regulatory compliance. - Collaborate with a stable team that knows the domain deeply. Technical Requirements:. - 5+ years Full Stack development with both Node.js/TypeScript AND Python/Django. - Strong React.js, Redux, and modern frontend development. - PostgreSQL expertise including complex queries, transactions, migrations. - Experience with both Knex/Objection.js (Node) and Django ORM. - Microservices architecture experience. - Real-time systems (WebSockets, Socket.io, Celery). - AWS and Docker experience. - RESTful API design with JWT/OAuth authentication. - Testing frameworks (Jest for Node.js, pytest for Python). - Financial or insurance systems experience is a plus. - Strong English communication (B2-C1). - Overlap with Eastern USA timezone for meetings. Tech Stack. Backend:. - Node.js/TypeScript: Koa.js, Objection.js, Knex.js. - Python: Django 4.2+, Django REST Framework, Celery. - PostgreSQL, Redis. Frontend:. - React, Redux, Material-UI. - TypeScript, Vite. - Formik, Yup validation. Infrastructure:. - AWS (S3, EC2, RDS). - Docker, PM2, Gunicorn. - Socket.io, WebSockets. - DocuSign, Payment APIs. - Jest, Supertest, pytest. - Swagger/OpenAPI. Company Location: Ukraine.