Mountain ridge above the clouds at dusk, Italy
Joseph Takahata

Software engineer

Full-stack engineer shipping production systems across banking, e‑commerce and SaaS.

Now
Staff Engineer, SingleFile
Before
J.P. Morgan · Bonanza · Zwaty
learn

about me

I'm a full-stack engineer with a career spanning banking, e-commerce, and SaaS. I built and led teams at J.P. Morgan across trading and loans technology before moving into the startup world, and today I'm a Staff Engineer at SingleFile.

I've been around enough production systems to know when to build, when to reach for something off the shelf, and how to make the two work together.

I like working in teams as much as I like working alone. I'll mentor junior engineers and help them level up, step into a technical lead role when a project needs it, or put my head down and ship. AI tooling has become a natural part of how I build, and I've found it makes the whole team faster when used well. If you're growing an engineering team or have an idea you want to build out, feel free to reach out.

lived

places

Four cities, two continents. Pick one, or spin the globe.

Houston, Texas
Everything is a thirty-minute drive, including the things that are close. Learned that "but it's a dry heat" is something people say about other places. Left with a permanent and unreasonable opinion about breakfast tacos and BBQ.
New York City, New York
Manhattan. Paid rent for a room I could cross in four steps. Walked more in a week than I'd driven in a month in Houston.
Brooklyn. Crossed the river for more square footage and immediately filled it. Learned which subway car stops nearest your exit, which is a real skill.
Seattle, Washington
Owned four rain jackets and used an umbrella precisely never. "The mountain is out" is a legitimate weather report, and I started using it. Coffee stopped being a drink and quietly became a personality.
Amsterdam, Netherlands
Learned to bike in the rain, in the wind, and eventually with no hands. Dutch staircases are less stairs than a ladder with strong opinions. Found out "gezellig" has no English equivalent, and that this is our problem.
career

experience

01Current

SingleFile

Director of Engineering / Staff Engineer

Automating business-entity filings for thousands of companies across the US.

02

Bonanza

Senior Software Engineer

Online marketplace connecting independent sellers with millions of buyers.

03

Zwaty

Lead Engineer / Senior Software Engineer

Nonprofit funding platform that helped communities back the projects that mattered to them.

04

JPMorgan Chase & Co

Tech Lead / Senior Software Engineer

One of the world's largest financial institutions, spanning investment banking, trading, and beyond.

technical

skills

  • Claude
  • ChatGPT
  • Python
  • Django
  • JavaScript
  • C#
  • PostgreSQL
  • React
  • React Query
  • Node.js
  • .NET
  • Java
  • Ruby
  • Ruby on Rails
  • MySQL
  • MongoDB
  • Oracle
  • AWS