RU EN
open to work

var developer =
"Yeldos";

// C#/.NET Developer · Backend · high-load systems

Nearly 5 years of commercial backend development (since 2021), specializing in high-load distributed systems, microservices architecture and performance optimization on .NET (C#).

Download CV PDF $ view --experience
Windows PowerShell 
<?xml version="1.0" encoding="UTF-8"?>
<developer>
  <name>Yeldos Sozakbay</name>
  <role>C#/.NET Developer</role>
  <location>Astana, Kazakhstan</location>
  <experience>4 years 10 months</experience>
  <skills>
    <skill>C#</skill> <skill>.NET</skill>
    <skill>PostgreSQL</skill> <skill>MS SQL</skill>
    <skill>Kafka</skill> <skill>Docker</skill>
  </skills>
</developer>

PS C:\Users\Yeldos> _
4
Years of experience
25+
Technologies
4
Certificates
3
Languages

01. Tech Stack

Languages

C#C# SQLSQL JSJavaScript JVJava HTHTML UMUML

Platform & practices

NT.NET MVMVC WFWindows Forms RSREST SPSOAP OOOOP / SOLID UTUnit Testing

Data & tools

PGPostgreSQL MSMS SQL Server NSNoSQL KFApache Kafka DKDocker GTGit CICI/CD SWSwagger JRJira SSStimulSoft LXLinux VSVisual Studio

02. Expertise

Architecture & Profiling Backend

Designing REST/SOAP APIs, integrating external systems and microservices, debugging complex defects in production.

REST SOAP Microservices
Databases & Performance Data

Removing bottlenecks in queries and database design, working with large volumes of data in PostgreSQL, MS SQL Server and NoSQL.

PostgreSQL MS SQL NoSQL
Async & High Load Highload

Asynchronous processing with async/await, multithreading and Apache Kafka to keep high-load services responsive.

async/await Kafka Docker

03. Experience

  1. Middle .NET Developer @ PBSOFT

    Jun 2021 — Mar 2026 · 4 years 10 months

    Building high-load services and applications with C# and .NET — from database design and business logic to production support.

    • Implemented business logic and client-server modules to technical specifications
    • Designed and optimized database schemas (PostgreSQL / MS SQL Server)
    • Architected and integrated external APIs, microservices and third-party systems
    • Used async/await and multithreading to improve system responsiveness
    • Ran code reviews and enforced clean code standards across the team
    • Mentored and onboarded interns
    • Estimated task effort and complexity, forecast development resources
    • Worked directly with clients: gathering requirements and presenting solutions
    C# .NET PostgreSQL MS SQL Kafka Agile/Scrum

04. Education

$ git log --education
  • 2024
    Bachelor's · Applied Informatics
    Siberian Institute of Business and Information Technologies
    Omsk · Applied Informatics in Economics
  • 2025
    The Complete Xamarin Developer Course
    Udemy
    Professional development course
  • 2025
    PostgreSQL Certification Course
    W3Schools
    Professional development course
  • 2020
    Software Development
    IT STEP Academy
    Professional development course
$ ls ./certificates
  • Udemy Xamarin Developer: iOS & Android
    Digital certificate · 2025
  • W3Schools PostgreSQL Certification Exam
    Digital certificate · 2025
  • Cisco CCNA: Networking
    Digital certificate · 2019
  • Cisco CCST: Cybersecurity
    Digital certificate · 2019
  • Applied Informatics
    Relevant university degree + international Cisco certifications

05. How I Work

“
I run code reviews and keep the team aligned with OOP, SOLID and Clean Code — code should be as easy to read as it is to write.
CR Code quality Clean Code · SOLID · Agile/Scrum
“
I onboard interns and help them grow their technical skills — a strong team matters more than one strong developer.
MT Mentoring Clean Code · SOLID · Agile/Scrum
“
I gather requirements, present solutions and stay focused on results even under tight deadlines.
PM Working with clients Clean Code · SOLID · Agile/Scrum

06. Languages

KZ

Kazakh

Native

RU

Russian

C1 — Advanced

EN

English

B2 — Upper-intermediate

contact.ps1

> Let's Work Together

Open to opportunities building high-load services and complex software products: full-time, part-time, project work or internship. On-site, hybrid or fully remote; ready to relocate and travel.

$ send --message Download CV