Dan Yishai

Software Developer

Tel Aviv, Israel
Senior Software Engineer, Permit.io

I help startups scale products and platforms while making sure the codebase keeps pace with company growth.

My background spans data engineering, databases, identity and authorization, and realtime applications.

I work across Rust, Python, and TypeScript on systems that need to stay fast, observable, and reliable in production.

Get in touchView work
Portrait of Dan Yishai

About

Architecture that keeps pace with growth.

I help teams build technical foundations for ambitious products, with attention to data flow, database design, authorization boundaries, service architecture, and realtime behavior.

Focus

Data Engineering
Databases
Identity & Authorization
Realtime Apps
Large-scale Backends
Rust
Python
TypeScript

Experience

Recent product and infrastructure work.

Permit.io

Software Developer

Open-source infrastructure, SDKs, and performance-sensitive backend systems.

Feb 2024 - Present

  • Maintain OPAL and the Permit PDP across roadmap, implementation, and developer adoption work.
  • Moved performance-critical services from Python to Rust for edge-deployed workloads.

Datarails

Software Architect

Architecture planning and cross-team execution in a scaling startup.

Apr 2023 - Feb 2024

  • Planned technical initiatives that unlocked new product capabilities for large customers.
  • Coordinated cross-team delivery and architectural direction across engineering.

Datarails

Senior Backend Developer

Backend foundations for ETL, analytics, and large-scale Python systems.

Oct 2021 - Apr 2023

  • Built core parts of an extensible ETL platform and Python microservice architecture.
  • Improved analytical database performance for data-heavy product workflows.

Selected Projects

A few things I’ve built.

Cooksmith
Public web app

Selected Work

Cooksmith

Side project

AI recipe workspace for drafting, sharing, and cooking.

TypeScript
AI Agent
Recipes
Product
Live
Celery Insights
90 stars

Selected Work

Celery Insights

Updated Mar 2026

Real-time visibility for Celery workers, queues, and task execution.

TypeScript
Celery
Redis
RabbitMQ
RepoLive
django-windowsauth
28 stars

Selected Work

django-windowsauth

Updated Nov 2025

Django auth integration for Windows, IIS, LDAP, and Active Directory.

Python
Django
IIS
LDAP
RepoDocs
dans-log-formatter
Python library

Selected Work

dans-log-formatter

Updated Jul 2025

Structured Python logging formatter for modern production service stacks.

Python
Logging
Datadog
FastAPI
Repo

Contact

Let’s build something useful.

Get in touch about open source, platform work, or useful products.

Get in touchView GitHub