Mercury

Mercury started as a traditional fintech company building core business banking products. For years, the company operated without dedicated product managers, relying instead on founders and engineers to make product decisions. This approach worked surprisingly well, but as the company scaled to 400+ employees with 200+ engineers, cracks began to show. The founders (including CEO Emaud, mentioned in the source) had pioneered this no-PM model based on the belief that great engineers and designers with product intuition could handle everything themselves.

Around two years before the interview, Mercury made a strategic shift. They initially hired "business leads"—essentially people doing PM work without the PM title. These business leads handled cross-functional collaboration, ensuring compliance and legal requirements were met before launches, and managing the project management aspects. However, when Mercury officially renamed these roles to "Product Manager" two years before the interview, the team realized the business leads, while effective at project management, lacked strategic planning, roadmapping, customer research, and prioritization skills. This gap prompted a rethink: Mercury needed to properly define what product management meant at their company.

Rohini Pandi, who had spent over seven years at Square (Block) leading product work on payments, invoicing, and the BitKey hardware wallet, joined Mercury about a year before the interview as a product leader heading the product expansion team. Her first move was foundational: creating a career ladder for PMs that explicitly defined expectations across three levels, grounding everything in Mercury's core values of humility and low ego. The ladder emphasized two key vectors: building products customers genuinely love, and ensuring work had positive business impact. Mercury also revamped their PM hiring process, testing for product sense, customer and quality obsession, analytical skills, and system-wide thinking.

They introduced a novel interview component: the Mercury presentation, where candidates discuss any topic they're passionate about in depth. This reveals attention to detail, care, and the ability to go deep—qualities Mercury valued. One memorable candidate presented an exhaustive breakdown of aircraft construction, from fuselage design to specific bolt choices.

No explicit first customer acquisition story is provided in the source, as Mercury was already an established fintech by the time the interview occurred. However, the multi-product expansion launched in 2024 reveals Mercury's customer expansion strategy. They launched Mercury Personal Banking in April 2024, marking their first foray into consumer products. Simultaneously, they built a suite of B2B software tools layered on top of their core business banking: bill pay (May), invoicing (August), spend controls and employee reimbursements (October).

Mercury's multi-product success came from understanding different PM archetypes. Rohini introduced a framework borrowed from Square: the pioneer PM (zero-to-one, creating from nothing), the town settler PM (growth stage, building foundations while experimenting), and the city planner PM (mature products, driving efficiency at scale). Mercury realized they needed different PM profiles for different product areas.

A critical insight was organizational structure. Mercury discovered that placing new product seedlings too close in the org structure to mature products like core banking made it hard for new products to grow. They decoupled the org to give new product teams autonomy.

Quality became Mercury's competitive differentiator. In a "boring" industry like fintech, Rohini argued that intentional design details breed trust. Their bill pay product exemplified this: when customers dragged and dropped invoices, the system would OCR the details and pre-populate fields while the right-hand screen zoomed into the exact invoice section being read. This detail didn't move any KPI but delighted users. Every customer mentioned it. The compounding effect of such intentional details attracted great talent and endeared customers—a circular advantage.

Each subsequent product launch took less time than the previous one, showing Mercury was getting better at understanding their product philosophy and execution. The organization learned to move faster without sacrificing quality.

As of 2024, Mercury operates a multi-product suite. Personal banking launched in April and is performing well. The B2B software suite—bill pay, invoicing, spend controls, and employee reimbursements—launched across the year. Rohini's product expansion team now incubates and scales new product lines. Mercury has grown to 30 PMs from zero, with roughly half being senior PMs with managerial responsibilities.

The company's philosophy on hiring reflects this maturity. Rohini emphasized that great PMs want to work on meaty problems with clear scope (ambiguity vs. scale on an S-curve) and want to play tennis with other great PMs. She also highlighted that candidates test interviewers as much as the reverse; Mercury's thoughtful interview process became a signal of their sophistication.

Mercury's journey from "we don't need PMs" to a 30-person product org illustrates that scale and complexity eventually require professional product discipline—but only when founders hit genuine bottlenecks, not before.