You can place bid using a submitOrder method, and as order command necessary to specify a PLACE_BID command. Let's assume that we want to to place the bid which will be good for one minute, for that we need to get current time in milliseconds and add one minute in milliseconds(60000):

long goodTillTime =  System.currentTimeMillis() + 60000;
engine.submitOrder("Bid label", instrument, OrderCommand.PLACE_BID, amount, bidPrice, slippage, stopLossPrice, takeProfitPrice, goodTillTime);

If good till time is equal to zero, then the place bid order will be identical to a JForex platform GTC parameter in a place bid form.

Example

Consider a strategy which on its start places a bid and as soon as the bid gets opened, changes the expiry time.

package jforex.orders2;

import com.dukascopy.api.*;
import com.dukascopy.api.IEngine.OrderCommand;
import com.dukascopy.api.util.DateUtils;

/**
 * The strategy on its start places a bid and as soon as the 
 * bid gets opened, the exipry time gets changed.
 *
 */
public class OneOrderPlaceBid2 implements IStrategy {

    private IConsole console;
    private IEngine engine;
    private IHistory history;
    private IOrder order;

    private final String label = "OneOrder";

    @Override
    public void onStart(IContext context) throws JFException {
        engine = context.getEngine();
        console = context.getConsole();
        history = context.getHistory();
        context.setSubscribedInstruments(java.util.Collections.singleton(Instrument.EURUSD), true);
        console.getOut().println("Start");

        //withdraw bid after 10 secs
        long goodTillTime = history.getLastTick(Instrument.EURUSD).getTime() + 10 * 1000; 
        //price 5 pips below the last bid price
        double price = history.getLastTick(Instrument.EURUSD).getBid() - 5 * Instrument.EURUSD.getPipValue();
        order = engine.submitOrder(label, Instrument.EURUSD, OrderCommand.PLACE_BID, 0.01, 
                price, 0, 0, 0, goodTillTime);
    }

    @Override
    public void onTick(Instrument instrument, ITick tick) throws JFException {}

    @Override
    public void onBar(Instrument instrument, Period period, IBar askBar, IBar bidBar) throws JFException {}

    @Override
    public void onMessage(IMessage message) throws JFException {
        if(message.getType() == IMessage.Type.ORDER_SUBMIT_OK && message.getOrder() == this.order){
            //cancel in 2.5 secs after opening the order
            order.setGoodTillTime(history.getLastTick(Instrument.EURUSD).getTime() + 2500);
        }

        //print all order related messages
        if(message.getOrder() != null){
            console.getOut().println(DateUtils.format(message.getCreationTime()) + " " +message);
        }

    }

    @Override
    public void onAccount(IAccount account) throws JFException {}

    @Override
    public void onStop() throws JFException {
        if (engine.getOrder(label) != null)
            engine.getOrder(label).close();

    }

}

OneOrderPlaceBid2.java