Heap, a product analytics company, successfully integrated session replay capabilities into its platform following the acquisition of Auryc Inc, a session replay company, within a tight four-month deadline. Initially, Heap had been exploring partnerships with various session replay providers, prioritizing modularity and simplicity to allow smooth integration of different tools into their platform. This groundwork allowed Heap to swiftly pivot and incorporate Auryc’s technology natively, leveraging a flexible and easily adaptable codebase. The team focused on embedding session replays seamlessly into Heap's user interface and met the challenge by breaking the workload into manageable segments, maintaining a balance between flexibility and straightforward code. By September 1, they launched a new feature line that was well-received by users, demonstrating the effectiveness of a modular approach and the importance of writing adaptable code that can accommodate changes in requirements. The experience underscored the value of defensive coding and modularity without over-engineering, allowing the team to adapt quickly to the new strategy.