server.js

const server = http.createServer(app);
const io = socketIO(server, {
    path: '/socket/'
});

let sockets = {};
let python_socket;

io.on('connection', socket => {
    console.log('New client connected!');
	
    if(socket.handshake.headers.name === 'python'){
        python_socket = socket;
    }
	
    socket.on('userId', user => {
    	sockets[user.userId] = socket;
    })

    if (python_socket) {
        socket.on('newJob', job => {
            let {id, link} = job;

            python_socket.emit('new_job', {id, link})
        });

        python_socket.on('job_add_success', {userId} => {
	    let userSocket = sockets[userId];
            userSocket.emit('job_add_success');
        });
    }
});