Senna has so far made a primarily positive start at Renault since replacing Nick Heidfeld ahead of last month's Belgian Grand Prix.
At Spa, Senna qualified a superb seventh, although he undid his good work by crashing into Toro Rosso's Jaime Alguersuari at the first corner La Source hairpin seconds after the start.
At Monza in the Italian Grand Prix 10 days ago, the 27-year-old Brazilian scored his first points in F1 by coming home eighth.
So far, Senna has justified his promotion from reserve and proved Boullier was right to place his faith in him, and for the remaining six races.
As for 2012, that is a different matter as team-mate Vitaly Petrov is contracted, whilst the hope of many is Robert Kubica is able to return as he continues to recover from his rallying accident in February.
Boullier claims it is "too early" to make a call on Senna's future, only to then throw a curveball by seemingly suggesting Petrov is far from safe.
The Frenchman added: "You have contracts, but there are some exit clauses for every party."
For Senna's part, he knows what he has to do and what is expected of him.
"The best way for me to be racing next year is with the results on the track," said Senna.
"The objective is to keep having strong results and fix my place in Formula One, and the key to that is to keep improving and learning.
"I can only learn as much as possible during a race weekend, which will only come with time."
Heading into this weekend's night race in Singapore, Senna concedes to amazing himself with what he has so far achieved.
"The target was to build up, so to qualify in the top 10 twice has been a great surprise," added Senna.
"It's a nice feat because this is Formula One, not a place where you can just sit down and beat the other guys.
"So it gives me happiness I am in a competitive car that allows me to be there or thereabouts.
"I'm gradually becoming more comfortable with the car and with the team, although there are a number of areas where I still need to progress.
"I need to improve my technical knowledge of the car, and there are some areas of my driving to brush up on. I'm certainly not 100% there yet.
"I'm sweeping up every piece of information I can, and I hope as a team we can continue scoring points and secure top 10 qualifying positions. We should be household names in Q3 every Saturday.
"Hopefully by the time I'm fully acquainted with the car, I'll be securing more points for the team."