Senior Frontend Engineer (React, Microsoft Azure IoT) - (B2B Contract)

Mesh Systems LLC; Remote; PLN 180,000 - 240,000; Full time

Job summary

A leading IoT solutions company in Poland is seeking a Senior Frontend Engineer to design and implement advanced cloud systems for IoT. You will build and maintain complex React/TypeScript applications, develop scalable UI components, and collaborate with backend teams. Ideal candidates have expert knowledge of React and TypeScript, along with strong problem-solving skills. This role offers a B2B contract with an hourly rate of $40-$50 USD, and the opportunity to work remotely in the CET timezone.

Benefits

Training budget for professional growth

Support for Microsoft certifications

Qualifications

• Expert knowledge of React, TypeScript, and modern JavaScript.
• Strong experience with Vite build tooling and optimization techniques.
• Deep understanding of CSS-in-JS solutions.
• Solid experience writing unit tests with Vitest or similar frameworks.
• Experience with RESTful API integration and handling async operations.
• Familiarity with Git workflows.
• Strong understanding of web performance optimization and accessibility standards.
• Excellent problem-solving skills and attention to detail.
• Strong communication skills in English.

Responsibilities

• Build and maintain complex React/TypeScript web applications for industrial IoT monitoring.
• Develop type-safe, scalable UI components.
• Implement robust data fetching and state management.
• Collaborate with backend teams to integrate RESTful APIs.
• Participate in code reviews and maintain high code quality standards.
• Optimize application performance.
• Work with designers to implement pixel-perfect, responsive UIs.

Skills

React

TypeScript

JavaScript

CSS-in-JS

RESTful API

Git

Unit testing

Problem-solving

English communication

Tools

Vitest

Vite

Docker

Job description

About Mesh Systems

Mesh Systems are the Connected Product People. As a trusted Microsoft Partner, we help clients build, scale, and unlock value from their digital products. We specialize in creating scalable, cloud-based systems to process massive data volumes for global clients.

We are currently on an ambitious path to merge IoT with cutting-edge Artificial Intelligence, opening doors to future-proof projects. We're looking for an experienced Software Engineer to work with our engineering teams and help us shape the future of connected technology.

Compensation and Contract Model

Model: B2B Contract (100% Remote)

Availability: Collaboration within the Central European Timezone (CET).

Hourly Rate (USD): $40 - $50 USD / hour

Support: We provide support with formalities for Polish contractors working with a U.S. company.

What You Will Do

As a Senior Frontend Engineer, you will help in designing and implementing advanced cloud systems for IoT:

• Build and maintain complex React/TypeScript web applications for industrial IoT monitoring and asset management.
• Develop type-safe, scalable UI components.
• Implement robust data fetching and state management.
• Collaborate with backend teams to integrate RESTful APIs and handle real-time asset telemetry data.
• Participate in code reviews and maintain high code quality standards.
• Optimize application performance.
• Work with designers to implement pixel-perfect, responsive UIs across devices.

What You'll Bring

We are seeking an engineer with senior proficiency and architectural understanding of modern user interfaces:

• Expert knowledge of React, TypeScript, and modern JavaScript.
• Strong experience with Vite build tooling and optimization techniques.
• Deep understanding of CSS-in-JS solutions.
• Solid experience writing unit tests with Vitest or similar frameworks.
• Experience with RESTful API integration and handling async operations.
• Familiarity with Git workflows.
• Strong understanding of web performance optimization and accessibility standards.
• Excellent problem-solving skills and attention to detail.
• English Proficiency: Strong communication skills for seamless collaboration with U.S. partners and clients.

Bonus Points

• Experience with Azure DevOps and Azure Pipelines for CI/CD.
• Experience with Docker containerization.
• Knowledge of Azure Container Apps and cloud deployment strategies.
• Background in industrial IoT, asset management, or monitoring systems.

What Makes Working at Mesh Systems Unique?

• Autonomy & Impact: Work in small, agile teams where your engineering decisions have a real impact. We value pragmatic solutions and customer-focused thinking.
• Cutting-Edge Technology: Get direct access to Microsoft Azure technologies in Private Preview thanks to our close partnership.
• Culture: Join a team of passionate professionals and share knowledge about the most innovative solutions on the market.
• Future Focus (IoT + AI): Be part of our transformation, integrating IoT solutions with AI/Machine Learning at the intersection of the most advanced technologies.
• Professional Growth: We offer a dedicated training budget and full support for Microsoft certifications.