Senior Java Software Engineer (Estado de México)

We are seeking a Senior Software Engineer to help build and scale Tongo's fintech platform using modern frontend frameworks (Angular, React, Next.js) and Go-based backend services, while leveraging Claude Code AI as a core part of the development workflow. This role focuses on building secure, scalable, and user-centric systems across web and backend layers, using AI-assisted development to accelerate delivery, improve code quality, and enhance system design. You'll collaborate closely with product, data, finance, and platform teams to deliver mission-critical functionality for payments, risk, and real-estate financial workflows. Key Responsibilities Design, build, and maintain backend services in Go and frontend applications using Angular, React, and Next.js. Leverage Claude Code AI (and similar LLM tools) for:
* AI-assisted coding, refactoring, and documentation
* Rapid prototyping and architecture exploration *Test generation, code reviews, and debugging Build and integrate APIs and services that interact with financial platforms, third-party providers, and internal systems. Develop data-aware services that support reporting, reconciliation, and operational workflows. Implement secure authentication, authorization, and role-based access control patterns. Partner with product and design teams to deliver intuitive, performant user experiences. Contribute to CI/CD pipelines, automated testing, and infrastructure-as-code practices. Apply security, reliability, and compliance best practices in a regulated fintech environment (SOC 2, PCI). Document system architecture, service contracts, and AI-augmented development patterns. Mentor engineers and help define best practices for using AI effectively in software development. Required Qualifications 5+ years of experience as a Software Engineer working across frontend and/or backend systems. Strong experience with Go for backend services. Hands-on experience with Angular, React, and/or Next.js in production environments. Solid understanding of RESTful APIs, system design, and distributed systems fundamentals. Experience using AI coding assistants (Claude, GPT-based tools, Copilot, etc.) as part ofdaily development. Familiarity with cloud-based environments and modern deployment practices. Understanding of security, data protection, and compliance considerations in regulated systems. Preferred Skills Experience with AWS (S3, Lambda, ECS, EKS, or similar). Exposure to event-driven architectures or messaging systems. Familiarity with financial APIs, payments, commissions, or banking integrations. Experience working with analytics-backed applications or data-heavy workflows. Optional experience with Python for scripting, automation, or internal tooling. Experience building or contributing to design systems or shared frontend component libraries. Interest in agentic AI tools and workflow automation (n8n, Zapier, internal AI agents). Postúlate en Kit Empleo: kitempleo.com.mx/empleo/5v6wx2