Independent product developer · since 2023~/kerem-alkan $ whoami

I worked in retail. Now I build software for it.

I know store and e-commerce operations from the inside, and I use that to build price intelligence for retailers, B2B data tools and free open-source software.

See the work Read the CV

Open to roles and consultingcontact@keremalkan.com LinkedIn ↗GitHub ↗

At a glanceNov 2026

Now: B2B Partnerships Lead, Biletwise
Building: Beacon · Data Dent · PageSiren
Before: Brand & Technology Specialist, Aztek Teknoloji · 7 global brands (2025–2026)
Open to: Roles and consulting
Stack: TS · React · Rust · C# · Luau
Contact: contact@keremalkan.com

Selected workSelected work

Six projects in retail, data and games. Some are live, some are still in progress.

Beacon

Retail price & ops intelligence

Live

A platform sold to retailers. It collects competitor prices from six sources, seller by seller, flags every price change and keeps the history.

Price sync runs on GitHub Actions in a real Chromium browser, because requests from cloud IPs kept hitting bot walls
Two modes: market view and side-by-side comparison
The platform takes no side: each customer owns its data
Mobile-first PWA with a one-handed layout and web push

Next.js
TypeScript
PWA
GitHub Actions
Chromium

beacon.keremalkan.com ↗single developer · business figures are not public

price chartillustrative dataprice-sync.ymlillustrative run

runs-on: ubuntu-latest
steps:
  - uses: actions/checkout
  - run:  npx playwright install
  - run:  npm run sync

$ npm run sync
› launching chromium (real browser)
› reading prices, seller by seller…
› change: competitor −₺30 → flagged
› saved to history
✓ sync finished

Measured with a re-runnable probe. Plain HTTP and a spoofed TLS fingerprint from a cloud IP were blocked; a real browser got through.

Data Dent

Medical & dental B2B data

Desktop

A B2B contact data library for Turkey’s medical and dental market. It runs on the desktop, and its database is encrypted.

Designed around Turkey’s data protection law (KVKK): the schema has no column for personal phone or e-mail
No personal contact field is kept without a recorded legal basis
Opt-out records are never deleted, and every export reads from a single view
The database itself enforces these rules with SQLite triggers

Rust
Tauri
encrypted SQLite
KVKK

private repo · no distribution

institutions tableillustrativeschema · institutionsexcerpt

Data Dent

Institution	City	Buyer type	Procurement	Source
Dental clinic	Ankara	private clinic	direct	✓
Oral health centre	İzmir	public	tender	✓
Private hospital	Bursa	private hospital	direct	✓
Dental laboratory	İstanbul	private laboratory	direct	✓
University hospital	Ankara	public	tender	✓

source_url         TEXT NOT NULL
buyer_legal_type   TEXT NOT NULL
procurement_model  TEXT NOT NULL

No column for personal contact.

No personal phone or e-mail field
Opt-outs are kept, never deleted
Exports read from one view
Enforced by SQLite triggers

PageSiren

Page change watcher

Open source

Stop pressing refresh. Get a siren the moment a page changes. Tickets back on sale, a restock, a free appointment slot, an exam result.

Free and local: no account, no cloud, no tracking, no page limit
Few false alarms: a change must show up in two reads in a row, and “sold out” is recognized in 15+ languages
Works on pages behind a login, and can reach your phone through Telegram, Discord, ntfy or a webhook

MIT
v0.1.2
browser extension
Windows installer
0 dependencies

github.com/kerem-alkan/pagesiren ↗

real demoPageSirenextension/engine.jstwo-read confirmation

Adding a sold-out page to PageSiren; when the page changes, a red alarm window shows exactly what changed — The real demo from the PageSiren repo

function confirm(pending, c) {
  const take = (list, pool) => { … };
  const p = pending || { added: [], removed: [] };
  const a = take(c.added, p.added || []);
  const r = take(c.removed, p.removed || []);
  return {
    confirmed: { added: a.yes, removed: r.yes },
    pending: { added: a.no, removed: r.no },
  };
}

$ npx pagesiren

Haunted Moving Co

Roblox · 1–4 player co-op

In development

A co-op comedy about moving house. Your furniture has other plans.

Made together with a game designer
Luau and Rojo, with server-authoritative multiplayer
Not released yet, so there is no link

Roblox
Luau
Rojo

Arise

Personal PWA

Experiment

A small app I made to track my own weight and health.

kerem-alkan/arise ↗

CraftAbyss · Orb

Minecraft community + live radar

Live

A Minecraft community server, and Orb, a live 3D radar I built to show the server’s status, load and players.

Currently the real data comes from the server panel (Pterodactyl) about every 5 seconds: status, CPU and RAM, network health, players online
Three data tiers: the full orb-agent, basic data from the server panel, and a demo mode when neither answers

3D
real-time
Pterodactyl
Minecraft

craftabyss.com

Orb · HUDillustrative values

status: up
CPU: 38%
RAM: 5.1 / 8 GB
network: healthy
online: 14

illustrative values

ExperienceExperience

I work where two worlds meet: commercial results and the technology that makes them possible.

Oct 2026 – nowB2B Partnerships LeadBiletwise

Building and running Biletwise’s B2B channel with travel agencies and MICE companies in Turkey, the Gulf, Europe and Asia: tickets and event solutions for football, tennis, concerts and basketball.

Nov 2023 – nowFront-End & Digital Experience DeveloperIndependent Digital Projects

My own products, built with modern web technology and a focus on user experience: Beacon, Data Dent, PageSiren and Orb.

Apr 2025 – Aug 2026Brand & Technology SpecialistAztek Teknoloji

The first brand representative in a store that had never had one. Took monthly revenue to 9× in November 2025 (+800%) and kept it around 5× after that. Top 7 among the portfolio’s retail channels across Turkey (Apr–Dec 2025); the results helped the portfolio expand to 6 in-store display areas across 4 brands. Brands: JBL, Harman Kardon, Thule, Marshall, Case Logic, Hama, Skross.

Feb 2024 – May 2024Customer Experience ConsultantTurkcell

Solution-focused support for telecom products and services, across sales, customer experience and store operations.

Aug 2023 – Nov 2023Huawei Brand RepresentativeHedef Direct

Huawei’s ecosystem products in MediaMarkt stores: phones, tablets, wearables and consumer electronics.

May 2023 – Aug 2023Philips Brand RepresentativeKayraGrup

Philips audio and mobile accessories in MediaMarkt stores.

Dec 2022 – Mar 2023Technology Sales ConsultantVatan Bilgisayar

Sales and product advice for OEM and notebook product groups.

Jun 2021 – Sep 2021E-commerce & Operations SpecialistTesla Research Technologies

E-commerce for global tech brands such as Digitus, Eaton, D-Link and Racksys: product data, stock, competitor price analysis, distributor purchasing and pricing.

Sep 2018 – Apr 2021E-commerce & Technical Support SpecialistImfexim Elektronik

Technical service and after-sales support for Wiky Watch kids’ smartwatches; product data, XML feeds, WooCommerce and T-Soft. During the pandemic I ran the technical side of remote-teaching broadcasts on OBS Studio.

Stack

TypeScript
React
Next.js
Rust
Tauri
C# / .NET / WPF
Python
Luau
Drizzle
Postgres / Neon
PWA

Business skills

B2B sales
Stakeholder management
Event management

Education

Associate degree in Computer Programming, Bolu Abant İzzet Baysal University · 2020 → 2027 (in progress)

Languages

Turkish (native) · English (professional working)

Let’s talkLet’s talk

Open to roles and consulting. I usually reply within one business day.

contact@keremalkan.com

github.com/kerem-alkan ↗linkedin.com/in/kerem-alkan ↗

I worked in retail. Now I build software for it.

Selected work## Selected work

Beacon

Data Dent

PageSiren

Haunted Moving Co

Arise

CraftAbyss · Orb

Experience## Experience

Stack

Business skills

Education

Languages

Let’s talk## Let’s talk

Selected workSelected work

ExperienceExperience

Let’s talkLet’s talk