Engineering the Modern 401(k)
Retirement infrastructure is a harder engineering problem than most people think.
Behind every 401(k) contribution is a chain of compliance checks, custodial integrations, payroll syncs, and real-time portfolio operations that has to work correctly every single time. The systems that power most of this industry were built decades ago. We’re building new ones.
At Basic Capital, our engineering team is designing the modern stack for employer-sponsored retirement — from the APIs that connect payroll providers to plan administration, to the execution layer that gives participants access to institutional-grade investment strategies.
This blog is where we write about the problems we’re solving and how we’re solving them.
That includes:
Infrastructure and scale. Processing contributions across hundreds of employers means building systems that are fast, fault-tolerant, and auditable. We write about the architecture decisions behind that work.
Financial systems design. Money movement in retirement accounts operates under strict regulatory constraints. We explore the technical patterns we use to handle compliance, reconciliation, and custodial operations reliably.
Data and decision-making. From plan analytics to participant modeling, we share how we use data to build better products and surface better outcomes for the people who use them.
AI and agentic systems. We're exploring how AI agents and intelligent automation can streamline plan administration, improve participant outcomes, and reduce the operational complexity that has defined this industry for decades. We write about what's working, what isn't, and where the real opportunities are.
Developer experience. We’re a small, high-leverage team. We write about the tools, workflows, and engineering practices that help us move quickly without cutting corners.
We started this blog because the intersection of fintech and retirement is underwritten about — especially from a technical perspective. Most of the interesting challenges in this space never make it into a blog post. We're trying to change that.
