On behalf of our client we are seeking of the best candidate to do this all job:

Architect and build robust, performant web applications using Esri’s Developer tools such as ArcGIS REST API and ArcGIS API for JavaScript as main tools. You can combine it with any other library or technology.
Implement methods that monitor the health, performance, and usability of systems, tools, and sites as well as maintain the code quality and structure
Write clean, well-documented, high-quality code that meets accepted standards ensures optimal performance, and achieves business requirements for QA to test deliverables
Solve and articulate complex problems with websites design and user experiences in a collaborative environment
Collaborate effectively with Industry Solution Team to review input from customers and help to respond to their needs.
Stay current with complementary programming languages, development methodologies, user interface design techniques, and database tools
Continuously discover, evaluate, and implement new technology to improve product quality.
Understanding of agile software development and continuous integration practices
Experience in Web GIS development, ArcGIS Platform experience
Knowledge in PWA and microservice application