react, OSM, openLayer, typescript senior 4 geo visualisation

We look for react, openLayer, typescript senior expert with openstreetmap (OSM) and geotools in depth knowledge on how to implement a visualization of GPS points as polygones to visualize on a map. Beside of that polygone we want to visualize given GPS points on same map Prefered technologies: typescript, react, OSM, openLayer You will get a csv with polygone and additional GPS points you will also get the java classes for the polygone and GPS points as reference implementation you will require to define mutiple GPS polygones against you can test your given data. Preferably this polygones are also provided as a Excel list Your job will be to implement the logic UI for displaying. Also to explain us some basics behind the coding Your background is: - multiple years of experience with GIS / geo spacial data in typescript /react - multiple years of experience with typescript & react Milestones Assuming following existing classes, which you have to recommend from your suggested libs and apis - GpsPolygone (defines a arbitrary geo fence in GPS coordinates) - GpsPosition (any position in GPS coordinate) MS1: Implement a visualization of the polygone and points on openstreetmap map. - requires to have zoom option to be able to zoom to all levels (continent view, down to the size of viewing housegarden sizes) - your implementation has a main method to initialize your implementation class - your implementation class provides methods - void visualizePolygone(GpsPolygone) - void visualizePolygoneAndPoints(GpsPolygone, List<GpsPosition>, Color polygone, boolean fillPolygone, Color, points) - you get the data via a REST api, but you will require to mock it on the beginning until the backend is done MS2: we require this functions too - implement an option to display a list of polygones on top of the map - implement on option to jump to a specific point with a zoom level - implement on option to jump to a specific polygone center with a zoom level MS3: - implement us a option to select areas on a map. - the selection shall be of the size of about 1meter x 1meter - the selection shall be able to increase the selection sizes up to 100m x 100m in different steps (1, 2, 5, 10, 25, 50, 100) - the selection can be grouped to one object e.g. "parking lot 001" - you provide us the shape of this parking lot to the backend via a rest api json call more milestones to be awarded based on your expertise Implementations: - the gps positions and polygones are predefined under src/test/resources as xlsx, so it can be easily modified by non tech guys for more corner cases - require a npm/[login to view URL] with fixed (stable) versions - a runner/packager like gulp/grunt - a dependency management if required beside [login to view URL] for frontend components like bower If you are a good fit, you are open to get more tasks about implementing solutions fully on your own (e.g. with your team) Budget? will not be disclosed, place your best bid to get considered What is next? We will share you a NDA and afterwards a paid test task. Payment? - you estimate in a WBS (optimistic, expected, pessimistic, where optimistic < expected < pessimistic) after getting the task - we discuss about clearances and effort - we mutually agree to effort - we assign you the task after mutually agreed - you implement & delivery - we pay (basically the rules of freelancer) Closed book vs open book? We work only on open book. Closed book means you are unwilling to define a WBS for the work and you add only a price tag to the task. We are sorry we will not hire you in such a case! Deliveries? - in our on premise git (access will be granted to you) - full sources - maven - clean code - best practices in the given topics - libs, need prior confirm and we prefer to use mostly latest stable versions - your code is working on our end and on our CI/CD - provide built environment with test execution - used libs and apis are on latest stable version - docker compose setup to run locally on your machine and (we will use it on CI/CD, if you are able to handle we place you an addition milestone for it)