BG Batuhan Gümüş
CV

IT Support Specialist / Software Engineer

Batuhan
Gümüş.

I fix things — from solder joints to Spring Boot services.

Software Engineering graduate who diagnoses hardware down to the component and writes the software that keeps systems running. Root cause first, every time.

Get in touch Download CV Available for work · open to relocation
Batuhan Gümüş soldering a circuit board at his workbench
FIG. 01 — At the bench, Istanbul
Degree
BSc Software EngineeringIstanbul Atlas University · 2022–2026
Core stack
Java · Spring BootPython · SQL · C# · C
Hardware
ESP32 · PCB designSoldering · component repair
Systems
Windows · macOS · LinuxSSH · VPS · NAS
Languages
Turkish · EnglishNative · Advanced

01About

A troubleshooter’s habit, an engineer’s toolkit.

I’m a Software Engineering graduate with hands-on experience diagnosing and repairing hardware — from smartphones and tablets to electronics I design myself. I’m comfortable across Windows, macOS and Linux, and I run my own servers and smart-home network.

What I bring to a team: the patience to find the real root cause, and the scripting and software skills to make sure the same problem doesn’t come back.

  1. 01

    Diagnose

    Measure before guessing. Whether it’s a faulty touch IC or a failing microservice, I isolate the fault first.

  2. 02

    Fix & build

    Screens, batteries, PCBs, REST APIs. I’m as comfortable with a soldering iron as I am in an IDE.

  3. 03

    Automate

    If I fix something twice, I write a script. Python, SQL and the shell keep routine IT work out of the way.

02Experience

Where I’ve shipped and repaired.

  1. Ongoing

    Device Repair Technician

    Freelance · Istanbul

    • Diagnose and repair smartphones, tablets and wearables: screen, battery and back-glass replacements, water-damage diagnosis, touch IC troubleshooting.
    • Refurbish used devices end to end — from fault finding to testing and resale.
    • Design, build and sell my own electronics (Wi-Fi sensors, smart light controllers) online, handling customer questions directly.

    DiagnosticsSolderingESP32Customer support

  2. 07/2025 — 08/2025

    Software Engineer Intern

    Hitit

    • Developed RESTful APIs with Java and Spring Boot for internal applications.
    • Fixed bugs in a microservice-based architecture within an Agile team.
    • Designed and queried relational SQL databases to speed up data access.

    JavaSpring BootRESTMicroservicesSQLAgile

  3. 10/2024 — 05/2025

    Web Developer

    TZI Consulting

    • Designed and developed the company website from scratch.

    Web designWeb development

  4. 07/2024 — 08/2024

    Software Engineer Intern

    Eterna Visio

    • Developed and improved multiple client websites, with a focus on performance.

    Web developmentPerformance

03Projects

Things I’ve designed, soldered and deployed.

SIM · Adaptive beam LIVE
car 0.94

—

Adaptive Matrix Headlight build: 12 LEDs with heatsinks, a constant-current driver per LED and the ESP32 controller board

P/01 · Embedded · Computer vision

Adaptive Matrix Headlight

A camera-based headlight inspired by Audi’s Matrix LED. It detects oncoming cars and dims only the segment of the LED array that would dazzle them — the rest of the road stays fully lit.

View on GitHub
Controller
ESP32
Array
12 × 3 W LED
Drive
Constant-current driver per LED, independent PWM
Optics
5° lenses split the beam into road segments
Smart Pill Tracker: 3D-printed red enclosure with six blister-pack compartments

P/02 · Hardware · Product design

Smart Pill Tracker

An ESP32 medication reminder and logging device, taken from idea to finished object: I designed the PCB in EasyEDA, modelled and 3D-printed the enclosure in Fusion 360, and built its web UI.

Controller
ESP32
PCB
Custom board, designed in EasyEDA
Enclosure
Modelled in Fusion 360, 3D-printed
Software
Medication reminders & logging, web UI
View on GitHub
SSHMQTT LAPTOP VPS · LINUX ROUTER PI 5 · NAS HOME ASSISTANT ESPHOME × n FIG. 04 — Network topology

P/03 · Infrastructure

Self-Hosted Servers & Home Network

My own infrastructure, run like production: a Linux VPS for personal projects and a game server, managed over SSH; a portable Raspberry Pi 5 NAS with PhotoPrism (in progress); and a smart-home network on Home Assistant, ESPHome and MQTT.

VPS
Linux, managed over SSH — personal projects & a game server
NAS
Raspberry Pi 5 + PhotoPrism, portable (in progress)
Smart home
Home Assistant · ESPHome · MQTT

P/04 · Hands-on

Device Repair & Own Electronics

Screen, battery and back-glass replacements, water-damage diagnosis and touch IC troubleshooting on phones, tablets and wearables. I refurbish used devices end to end — and design, build and sell my own Wi-Fi sensors and smart light controllers online.

Devices
Phones · Tablets · Wearables
Own products
Wi-Fi sensors · Smart light controllers

04Skills

Bill of materials.

Everything I bring to the bench, listed like a parts list.

RefGroupComponentsQty
U1 Operating systems WindowsmacOSLinuxRaspberry Pi OSServer admin over SSH 05
U2 Hardware Fault diagnosisPhone, tablet & wearable repairComponent replacementSolderingPCB design (EasyEDA) 05
U3 Networking TCP/IP basicsWi-Fi & router setupMQTTRemote server access 04
U4 Servers & self-hosting Linux VPSNAS setupHome Assistant 03
U5 Programming JavaSpring BootPythonSQLC#C 06
U6 Tools GitFusion 3603D printingESP32 / embedded systems 04

05Contact

Let’s fix something.

Open to IT support and software engineering roles — in Istanbul or abroad. The fastest way to reach me is email.