Software Engineer

Hi, I'm Sina — I build reliable software, end to end.

7+ years shipping enterprise applications — from Java/Spring backends and SQL data layers to Angular front-ends, Docker, and the cloud. I like the hard parts: production debugging, legacy modernization, and turning messy requirements into maintainable systems.

Sina Kooshesh

About

I'm a software engineer with 7+ years of experience delivering enterprise applications end-to-end. My core is backend engineering in Java and Spring Boot, but I work across the whole stack — Angular and TypeScript on the front, MySQL and REST APIs in the middle, Docker and AWS around it.

Most of my career has been in enterprise healthcare, where correctness, data privacy, and uptime aren't optional. I enjoy the parts other people avoid: debugging production issues under pressure, modernizing legacy systems safely, and turning vague requirements into software that's actually maintainable.

Alongside engineering, I bring 15+ years of experience as a sales manager — leading teams, owning targets, and working face-to-face with clients. That business background shapes how I build software: I understand the why behind requirements and can translate between stakeholders and engineers.

Outside of client work, I build my own tools and open-source learning programs — including two full job-ready engineering courses and a market-analysis assistant. I like understanding things deeply enough to teach them.

7+Years in software engineering
15+Years in sales & team leadership
Java · SpringBackend core
HealthcareEnterprise domain

Skills & Tools

The stack I reach for — plus the practices that keep it reliable in production.

Languages

JavaTypeScriptJavaScriptSQLPythonPHP

Backend

Spring BootGrailsHibernate / JPAREST APIsMicroservices

Frontend

AngularRxJSReactHTML / CSS

Data

MySQLSQL TuningQuery Optimization

DevOps & Cloud

DockerAWSCI / CDGit

Practices

System DesignTestingAgileProduction Debugging

Featured Work

Open-source programs I built end-to-end, a live tool, and the enterprise work behind my experience.

Live

Senior Java Engineer — Job-Ready Program

A complete, open-source interview-prep program: 220+ lessons, 100+ coding problems, 7 system-design case studies, mock-interview simulator, and a self-contained offline study app.

JavaSpring BootSystem DesignDocker
Live
🤖

AI Engineer — Job-Ready Course

An end-to-end AI/ML engineering curriculum — Python foundations, machine learning, deep learning, LLMs, RAG, MLOps, and agentic AI — with a browsable offline course app.

PythonMachine LearningLLMsRAG
Live
📈

Trade Helper — Cockpit

A full-stack market-analysis & demo-trading cockpit: multi-timeframe volatility/structure reads, position sizing, and account management. Public read-only, with login-gated demo trading and per-user account authorization. Flask + OANDA, reverse-proxied with automatic HTTPS.

PythonFlaskAuth & RolesFintech
Proprietary
🏥

Healthcare & Enterprise Systems

7+ years building and modernizing production healthcare applications — patient-facing systems, hospital integrations, strict data-privacy requirements, and high-uptime services on Java / Spring / Grails + Angular.

HealthcareLegacy ModernizationProductionSpring

Get in touch

Open to interesting engineering problems and collaborations. The fastest way to reach me is email or LinkedIn.