Full-Stack Developer (Go and React)

Quick Facts

• Role: Full-Stack Developer (Go and React)

• Collaboration: 100% remote (B2B)

• Rate: up to 150 PLN/h net + VAT

Description

Design and develop backend services and APIs in Go, and build web interfaces using React 19, Next.js, and TypeScript. Implement event-driven, asynchronous architecture and integrate IoT communication via MQTT, including real-time data, device status, alerts, and notifications. Deliver scalable, highly available solutions including Edge Computing scenarios, while covering authentication/authorization, observability, and CI/CD.

Responsibilities

• Build backend services and APIs in Go

• Develop and maintain a React/Next.js web application (React 19, App Router)

• Create event-driven solutions with asynchronous communication and MQTT-based IoT integration

• Design APIs (REST, gRPC, OpenAPI) and integrate relational and time-series databases

• Implement alerts, notifications, device status, and real-time data handling

• Build scalable, highly available systems (including Edge Computing scenarios)

• Develop user interfaces, dashboards, and authentication/authorization mechanisms

• Ensure code quality, security, and testability; improve observability and integrate with CI/CD

• Collaborate with architecture, DevOps, Flutter, and QA teams in a distributed environment

Requirements

• Very good knowledge of Go (goroutines, channels, context) and production-grade backend services

• Very good knowledge of React 19, Next.js (App Router), and TypeScript

• Experience with REST/gRPC/OpenAPI API design and development

• Knowledge of event-driven architecture and asynchronous messaging (e.g., Kafka)

• Experience with application state management (e.g., zustand), real-time data handling, and Tailwind CSS UI development

• Knowledge of NextAuth, JWT, authorization mechanisms, and role-based access control

• Experience with Prisma, PostgreSQL, time-series databases, and validation libraries (e.g., Zod)

• Knowledge of scalability, high availability, and application security

• Experience with OpenTelemetry and Prometheus; ability to test backend and frontend (Go testing, Jest, Testing Library)

• Practical knowledge of Git and CI/CD; experience working with distributed teams

• English proficiency at C1 level

Benefits

• 100% remote work

• B2B contract

• Rate: up to 150 PLN/h net + VAT