●Open to roles · Senior / Staff

Productengineerbuildingthings thatclick.

Staff-level product engineer currently building in energy trading, exploring design-engineer roles. Ship-focused. Full-stack.

▸ Operating · TS · React · Node · Postgres · K8s

▸ Speaking · EN · IT · FA

▸ Status · Open · Senior / Staff

▸ Uptime · 00:00

↓ Selected work ↓ Writing ↗ Get in touch ▸ Open terminal

Selected work

05 projects · 2018 →

cmd · /work --list --recent

bid & offer app · NL-power · day-ahead

01 · Energy trading2024 →

Bid & Offer App

The order book at the heart of an energy trading desk — live bids vs offers across counterparties, regions and renewable tech. Replaced three legacy tools; cut order-entry time in half.

TS · Postgres · KafkaRead case →

ts-time-utils.h8frad.work

02 · OSS2024 →

ts-time-utils

430+ utilities for dates, durations, timezones, calendars, and relative formatting. Tree-shakeable, fully typed, built for TypeScript-first projects. Zero dependencies.

TypeScript · MITDocs ↗

mamanfari.com

03 · Side2024 →

Maman Fari

A digital cookbook preserving Persian recipes — available in 7 languages, with every ornament and detail painstakingly hand-picked.

Next.js · PostgresVisit ↗

ateliertar.com

04 · Side2025 →

Atelier Tār

Small e-commerce studio for Persian heritage objects — limited-edition prints, ceramics, framed carpets.

Next.js · StripeVisit ↗

energy-trading-platform · 2019—26

05 · Energy trading2019—26

Mono → services

Monolith → 12 services → pragmatic serverless. Architecture should reduce the cost of change, not celebrate its own complexity.

Vue · Node · K8sRead case →

Try the API.

live · embedded · running this page

cmd · /demo --run ts-time-utils

Live · embedded · running this page

A small piece of my open source.

This is a real demo of ts-time-utils — my zero-dependency TypeScript library. Pick a date and watch it format, diff, and reason about it the way you'd hope a designed API would.

Open the playground ↗

ts-time-utils · v4.4

Date

—

Side projects

03 live

cmd · /side --live

→ 01

Writing

02 essays · 2025

cmd · /writing --list

№ 01

Overengineering is a product risk

2025 · 11 № 02

Better trading tools start with the trader's language

2025 · 10

About

The short version

The unabridged version is over a coffee

I'm a product engineer — I write the code and I sweat the pixels. Trained in distributed systems, raised on Material Design, now staff at an energy trading firm in Amsterdam shipping software for traders.

Iranian by birth. Italian by training. Dutch by paperwork. I keep three side projects alive at any given time because that's how I learn — build, ship, talk to users, repeat.

Born in Iran · M.Sc. from Polytechnic University of Turin (Computer & Communication Networks) · Fluent in English and Persian · Comfortable with Italian and Dutch.

Front

TypeScriptReactNext.jsVue.jsCSSMotion

Back & data

Node.jsNestJSPostgresRedisMySQLLaravel

Platform

DockerKubernetesKafkaAzureAWS CDKServerless

Product

Product thinkingUX engineeringFeature scopingPrototypingTrade-off analysisCross-functional

Experience

10+ years

2014 — present

2023 — now

Staff EngineerSTX Group · Amsterdam

Lead engineer for trader platforms. Mentor a small team. Set technical direction. Closest collaborators: product & design.

TS · Python
Postgres · K8s
Azure · Kafka

2019 — 2023

Senior EngineerSTX Group · Amsterdam

Led the monolith-to-microservices migration. Hired & mentored four engineers. Introduced engineering practices that scaled across teams.

Laravel · Vue
PHP · Redis
Docker

2018 — 2019

Full-stack EngineerGrrr B.V. · Amsterdam

Client-facing features and custom plugins for high-profile brands. Contributed to the agency's new backend stack.

JS · WordPress
Sass · Docker

2017 — 2018

Full-stack EngineerCastorEDC · Amsterdam

EDC platform used in global clinical research. Refactored legacy code for stability.

PHP7 · Doctrine2
ZF2 · MySQL

2015 — 2017

Full-stack EngineerWEREA S.r.l. · Milan

REST APIs and full-stack work for SaaS. Stripe, Dropbox, Pusher integrations. UI redesigned to Material Design.

AWS · AngularJS
Silex · Stripe

2014 — 2015

Graduate EngineerDiana Corp · Padua

Built Magento modules (Criteo, Google Merchant). Supported migration to SAP B1. Improved deployment via AWS.

Magento · PHP5
AWS · RabbitMQ

Open to
senior roles.
Let's talk.

Currently

Staff Engineer · Energy trading · Amsterdam

hatef@work:~$help · whoami · stack · projects · contact · clear

hatef@work:~$ — type help for commands

~/hatef ▸

Productengineerbuildingthings thatclick.

Selected work