Oh no, Nedry was getting screwed hard.
This is what the film alludes to with the argument:
Nedry: You can run this whole park from this room with minimal staff for up to 3 days. You think that kind of automation is easy? Or cheap? You know anybody who can network 8 connection machines and debug 2 million lines of code for what I bid for this job? Because if he can I'd like to see him try.
Hammond: I'm sorry about your financial problems, Dennis, I really am, but they are your problems.
Nedry: Oh, you're right, John, you're absolutely right. You know, everything's my problem.
Hammond: I will not get drawn into another financial debate with you, Dennis. I really will not!
Nedry: There'd be hardly any debate at all.
Hammond: I don't blame people for their mistakes. But I do ask that they pay for them.
Nedry: Thanks, Dad.
Nedry, as he points out, was hired as a lowest-bidding contractor. The job was simply to design a module for record-keeping. That was all they paid him for.
But then Hammond and InGen kept adding another thing and another thing and another thing, none of which were in the original contract. And when he refused, the would threaten to write his other clients and tell them he's unreliable and that they should cancel their contracts with him.
By this method, InGen kept extorting additional labor out of Nedry on top of the contract he'd completed. Additional unpaid labor.
Yeah, he wasn't actually getting paid to come out to the island and debug their systems; They were just making him do it under the original contract because they had already made him program a bunch of different systems in the dark without any idea of how they should fit together, and now those systems weren't working properly.
So when Dodgson offered him $1.5 million to steal some embyros, he jumped at the offer.
If everything had gone according to plan, Nedry would have filled up that can with the embyros and taken them to the dock. There, he'd pass the embryos off to Dodgson's man waiting there and hurry back to his desk. Then he'd turn all the systems back and go "Whew, system's finished debugging! Everything's looking good."
But he got mauled to death on his way to the dock and everything escalated from there.