Senior Fullstack Developer – Go/Java, React

• Design, build, and maintain full-stack features across frontend applications and backend services
• Develop and maintain backend APIs supporting onboarding, authentication, transaction lifecycles, and operational workflows
• Build and enhance customer-facing and internal web applications
• Integrate systems with third-party services and external providers
• Implement secure authentication and authorization using OAuth 2.0 flows
• Deliver scalable backend capabilities within a microservices environment
• Ensure applications meet high standards for security, performance, reliability, and observability
• Participate in code reviews, technical design discussions, and architecture decisions
• Write and maintain clear technical documentation
• Collaborate with product managers, designers, engineers, and operations teams to deliver reliable end-to-end solutions

• 3+ years of experience as a software engineer working across frontend and backend systems
• Strong experience building backend services in Go and/or Java
• Proficiency with Node.js and TypeScript v5
• Experience building frontend applications with Next.js, React, and TypeScript
• Solid understanding of RESTful API design
• Strong SQL skills and hands-on experience with PostgreSQL
• Experience working in AWS environments
• Familiarity with microservices and distributed backend systems
• Experience with Kubernetes, Helm, and Terraform
• Experience with monitoring and observability platforms such as Grafana
• Experience debugging with VS Code and/or Cursor
• Understanding of multi-threading and Go concurrency (goroutines)
• Experience integrating third-party APIs and external providers
• Experience with webhooks and WebSockets
• Software architecture and system design experience
• Familiarity with authentication, authorization, and secure system design
• Experience in fintech, crypto, payments, or other regulated industries
• Experience building internal dashboards or operational tooling
• Comfort using AI tools as part of the development workflow
• Advanced English communication skills
• Clear communication and a collaborative, ownership-oriented mindset
• Comfort owning features end-to-end across the stack

• Paid holidays (based on client calendar)
• 15 business days of vacation
• Health allowance
• Annual learning budget
• Company-provided computer