Software Engineer, Platform

Smartleaf is a Boston-based investment portfolio rebalancing service handling over $90 billion in assets. Our next milestone is doubling our capacity to handle 1 million accounts. In order to get to this next level of scale, we need to evolve our architecture and you can have a big impact on how we do that.

We value software engineering as a discipline. We’ll use AI where it reduces toil but not where it reduces understanding. We still expect every teammate to deeply understand what they ship. Generating lines of code has never been our bottleneck; figuring out the right problem to solve and the right thing to build is far more important.

We need a teammate who will ramp up within 1-3 months and help us get things done. We have more things to do than people to do them; if you are proactive, competent and reliable you can earn responsibility very quickly and help shape the way the department functions.

If you can bring skill, attention to detail and focus on getting working code into the world, while being a genuinely nice person to work with, we want to talk to you.

As a member of our platform team, you’ll be at the intersection of domain knowledge, a complex data model and a stream of real-world events. Every day, every portfolio is acted on simultaneously by market movements, corporate actions, user actions and system processes. Your job is to make sure the right things happen in the right order, and that edge cases are handled correctly so that financial advisors can trust what they’re seeing.

You’ll spend a lot of your time figuring out what correctness even means when multiple actions hit a portfolio at once. The UI work is real but mostly straightforward CRUD; the depth in this role is in the domain logic. You’ll need to reason carefully about state, event ordering and how the system behaves when it scales.

You’ll need to distill this complexity into a clear experience that allows financial advisors to understand the impact of their choices and present the best possible information to their clients. You’ll work closely with our product management team and our users to gather requirements and design solutions that help our users get things done and hold up under real world conditions. You’ll also participate in our support rotation and see firsthand how our users are interacting with the system.