Senior Web Gui Developer / Front-End Engineer

What professional skills are important?

Programming and Front-End Engineering

• Strong JavaScript / TypeScript development experience
• Strong understanding of ES2017+ JavaScript features
• Ability to write performant, scalable, and maintainable code
• Strong understanding of asynchronous event flow and asynchronous programming
• Understanding of algorithmic complexity and Big-O notation
• Knowledge of algorithms and data structures
• Understanding of common software engineering and programming patterns
• Ability to design clean and reusable front-end architecture
• Experience building low-latency, interactive user interfaces

Web Front-End

• Advanced HTML / CSS experience
• SCSS experience
• Experience building complex single-page applications
• Experience with performance optimization in browser-based applications
• Experience developing interfaces for data-heavy, analytical, geospatial, or monitoring systems
• Understanding of browser rendering, DOM performance, and responsive layouts

React

• Strong React.js experience
• Experience writing custom hook-based components
• Strong understanding of React component lifecycle
• Experience with shared state management, including Redux, Immutable.js, Context API, or similar approaches
• Ability to combine declarative React patterns with imperative DOM, SVG, canvas, or WebGL-based rendering when needed
• Experience integrating React with advanced visualization libraries and custom rendering layers

Data Visualization

• Strong D3.js experience
• Experience building custom advanced charts
• Experience with SVG-based interactive charts
• Experience integrating React and D3
• Ability to design visualizations for complex datasets, sensor measurements, time-series data, geospatial analytics, AI outputs, and monitoring results

WebGL / Graphics

• WebGL experience
• Understanding of linear algebra and computer graphics fundamentals
• Experience with raw WebGL programming
• Experience integrating React and WebGL
• Ability to build interactive, high-performance visual components for large datasets
• Experience with WebGL/SVG hybrid visualization is an advantage

Experience in the following areas will be an advantage

• GIS applications
• Geospatial data visualization
• Earth observation data
• Satellite or airborne data
• IoT sensor data
• 3D visualization
• VR or immersive interfaces
• Interactive dashboards for agriculture, mining, maritime, environmental monitoring, or critical infrastructure
• Visualization of AI / ML results
• Visualization of large-scale spatial, temporal, and sensor datasets
• Experience working with backend teams on API design and data exchange formats

Language requirements

• Spoken English of high level is not required, but the candidate should be able to read and write in English at an advanced technical level

Senior Web GUI Developer / Front-End Engineer

MONITORED AI Platform

We are looking for a Senior Web GUI Developer / Front-End Engineer for our product MONITORED AI .

OPT/NET BV is a scaleup from the Netherlands:

OPT/NET BV needs motivated and talented software developers who have the ambition to build advanced software products and contribute to making geospatial analytics, IoT sensor data processing, and AI-driven monitoring systems more intelligent, reliable, and scalable.

MONITORED AI is a Geospatial + IoT sensory Data Fusion & Analytics platform . It combines the analysis of large volumes of geospatial data with in-situ sensor data, giving users a holistic and insightful dashboard overview of monitored assets, environments, and operational areas.

MONITORED AI can support use cases such as smart agriculture, sustainable mining, maritime monitoring, environmental monitoring, and other domains where Earth observation data, sensor data, and AI-based analytics need to be combined into a practical decision-support platform.

For example, MONITORED AI can help monitor arable farmland by combining geospatial data with in-situ sensor data. In maritime monitoring, it can integrate Synthetic Aperture Radar satellite imagery and Automatic Identification System data to help detect dark vessels and suspicious behavior at sea.

The Web GUI is a critical part of MONITORED AI. It allows users to interact with complex geospatial and sensor-based datasets, inspect AI-generated results, explore dashboards, analyze events and anomalies, and understand monitored areas through high-performance charts, maps, and interactive visual interfaces.

We are looking for a senior professional who can design and implement advanced, high-performance web interfaces for complex technical, analytical, and geospatial applications.

We are looking for an independent, self-motivated professional who wants to learn, take ownership, and does not require constant routine supervision.

We need a “fire-and-forget” specialist who understands team and project priorities, can work with complex requirements, and can deliver reliable results in a product development environment.

The ideal candidate is not only a front-end developer, but also an engineer who is interested in complex visualization, geospatial analytics, IoT sensor data, AI-driven monitoring systems, and user interfaces for advanced technical products.

This position will report to the head of engineering.

Each new senior developer can grow into a team leader role, as OPT/NET BV is scaling up and looking for several strong specialists.

,[Development of advanced Web GUI components for MONITORED AI, Building high-performance dashboards, charts, maps, and interactive analytical views, Visualization of geospatial data, IoT sensor data, AI outputs, monitoring results, events, and anomalies, Integration of React-based interfaces with D3, WebGL, and backend APIs, Improving usability, performance, and responsiveness of the platform, Supporting the development of new visualization capabilities for 2-D, 3-D, and multidimensional datasets, Working closely with backend, AI, data engineering, and product teams] Requirements: AI, IoT, Analytics platform, Use cases, JavaScript, TypeScript, Data structures, User Interface, HTML, CSS, SCSS, React, Redux, API, SVG, Data visualization, WebGL, Product development, VR