Background

Kubilay Birer.

Creative Developer.

I build digital experiences.

Bridging design and engineering.

Scroll to explore

Skills

.NET logo
C# logo
Entity Framework Core logo
MySQL logo
Microsoft SQL Server logo
Backend Development

.NET Core, Entity Framework Core, REST API, MSSQL, MySQL, SignalR, Stripe

I began my software development journey with C# and have been actively using it since day one. Because I learned core programming principles (OOP, SOLID, layered architecture) through real C# projects, my expertise in the language is strong. I've built advanced backends, from MVC applications during internships to architecting and developing the entire Scorpii Score backend at Calgra Group. I have extensive experience with both MySQL and MSSQL, designing relational databases, applying Code First and Database First approaches, managing schemas, and performing administration tasks such as permissions and backups. My database and backend experience come directly from building production-grade systems.
Proficiency85%
Flutter logo
Dart logo
Next.js logo
TypeScript logo
Tailwind CSS logo
HTML5 logo
CSS3 logo
JavaScript logo
Bootstrap logo
Mobile & Frontend

Flutter, Dart, Next.js, TypeScript, Tailwind CSS, HTML, CSS, JavaScript, Bootstrap

Initially, I worked almost exclusively on backend systems, but later in my internships and at Calgra Group, I took on full-stack roles. I developed responsive MVC web applications and built most of the Scorpii Score mobile UI in Flutter (state management, navigation, theming, API integration). I'm proficient in HTML, Bootstrap, CSS, and JavaScript, and have also integrated advanced 3D JavaScript libraries like Three.js and Spline to enhance visual quality. Recently, I've expanded into modern frontend frameworks—building production Next.js applications with TypeScript and Tailwind CSS for freelance projects in the medical calibration industry. My approach balances functionality with polished design and user experience.
Proficiency75%
Git logo
GitHub logo
Jira logo
Version Control & Tools

Git, GitHub, JIRA, CI/CD

I have used Git and GitHub since the start of my career—progressing from simple commits to advanced workflows. I'm comfortable with branching strategies, merge/rebase, pull requests, permissions, and protected branches. In my latest projects, I implemented GitHub-based CI/CD pipelines to automatically build, test, and deploy to production servers. This setup included automated checks, environment secrets, and safe rollback strategies. I integrate Git with JIRA to maintain full traceability between tasks and code changes.
Proficiency80%
Soft Skills

Practical intelligence, solution-oriented, fast learner, adaptable, team player, detail-oriented, time management

I've proven my soft skills in internships, university projects, and my role at Calgra Group. The rise of AI tools has amplified my strengths in problem-solving and practical thinking—allowing me to deliver advanced results even in unfamiliar tech stacks. I can quickly adapt to new technologies thanks to strong software development fundamentals. For example, I built a full-stack bus ticket reservation system in just two months using PHP & CodeIgniter 4 after learning PHP from scratch—demonstrating both rapid learning and adaptability.
Proficiency70%
Docker logo
AWS logo
Firebase logo
Vercel logo
Railway logo
Cloudflare logo
Cloud & DevOps

Docker, AWS, CI/CD Concepts, Firebase, Vercel, Railway, Cloudflare, S3 Object Storage

My DevOps experience began with deploying full-stack and static projects to GitHub Pages and Vercel. Later, I participated in a selective, government-supported AWS training led by Hakan Hilmi Kapucu (CEO of LimonCloud). This program was entirely hands-on, covering AWS Console, AWS Pricing Calculator, and real-world architecture diagrams. I provisioned and configured EC2 instances, S3 buckets, IAM roles, and VPC fundamentals. Recently, I've gained hands-on experience with Railway PaaS for deploying production backends and Cloudflare for domain management and R2 Object Storage integration using S3-compatible APIs—all applied in a freelance medical calibration project.
Proficiency60%
Python logo
Django logo
FastAPI logo
PHP logo
CodeIgniter logo
Kotlin logo
Other Frameworks & Languages

Python, Django, FastAPI, PHP, CodeIgniter, Kotlin

I've used these technologies in university projects, hackathons, and personal builds. Examples include Python for automation and Quantum ML research (Qiskit, PennyLane), Django/FastAPI for quick REST APIs, PHP/CodeIgniter for a ticket booking platform, and Kotlin for the SmartNavigation accessibility app. While these are not my primary stacks, I can design features, debug effectively, and follow good structure. With focused time, I can quickly reach an advanced level in any of them.
Proficiency50%

Professional Experience

Calgra Group Logo

Calgra Group

Edinburgh, UK (Remote)

Backend & Mobile Developer

Current Promoted
Jan 2025 - Present • Full-time
  • Led the development of the Scorpii Score mobile application (Flutter) and backend (.NET Core, MSSQL).
  • Implemented match predictions, user scoring, push notifications, payment integration, live scores, social features, and real-time messaging.
  • Designed and optimized database architecture, improving application performance and handling growing user base effectively.
.NET logo.NETFlutter logoFlutterREST APIMySQL logoMySQLJira logoJiraFirebase logoFirebaseSignalRStripe

Backend & Mobile Developer Intern

Internship Started Here
Aug 2024 - Jan 2025
  • Designed and developed comprehensive APIs using .NET Core and EF Core for web and mobile apps.
  • Built mobile apps with Flutter, consuming the API for seamless interaction.
  • Led Scrum meetings and Sprint Planning as Scrum Master, using Jira for task management and team workflow optimization.
.NET logo.NETFlutter logoFlutterREST APIMySQL logoMySQLJira logoJiraFirebase logoFirebaseSignalRStripe
Prometeon Tyre Group Logo

Prometeon Tyre Group

Kocaeli, Türkiye

Full Stack Web Developer Intern

Internship Returned
Jul 2023 - Sep 2023
  • Developed a Full Stack Intern Register Web App with admin dashboard for 100+ interns.
  • Developed a Full Stack Magazine Web App for publishing company magazines.
  • Collaborated with cross-functional teams to deliver high-quality web solutions and enhanced user experience.
.NET logo.NETMSSQL logoMSSQLGit logoGitHTML logoHTMLCSS logoCSSJS logoJSBootstrap logoBootstrap

Data Analyst Intern

Internship First Experience
Jul 2022 - Sep 2022
  • Managed factory database using Dremio, FactoryTalk, and MSSQL (~10,000 entries daily).
  • Used SQL, Grafana, and Python to visualize data, improving accuracy by ~30%.
  • Worked on machine monitoring systems for real-time data collection and anomaly detection, improving query speeds by up to ~50%.
DremioGrafana logoGrafanaMSSQL logoMSSQLGit logoGitPython logoPython

About Me

I am a motivated and practical-minded Backend & Mobile Developer who thrives in collaborative and dynamic environments. With valuable project experience and a passion for continuous self-improvement, I quickly adapt, take responsibility, and support my team. I value teamwork, clear communication, and a positive attitude, aiming to grow into a reliable and productive part of any organization.

Currently, as a Backend & Mobile Developer at Calgra Group , I am focusing on the development of the Scorpii Score Mobile App platform, building innovative features and enhancing user experience while contributing to the company's technological advancement.

Education

Kocaeli University

Kocaeli, Türkiye
BSc in Information Systems Engineering
09/2021 – 06/2025Graduated
Bachelor's Degree
  • Graduated with honors, GPA: 3.46
  • Academic and extracurricular projects: automation, cloud computing, AI
  • AI advisor in interdisciplinary thesis (psychology & AI)
  • Led graduation project on quantum machine learning (TÜBİTAK submission)
Information SystemsSoftware EngineeringAI & MLDatabase SystemsProject Management

24 Kasım Anadolu Lisesi

Kocaeli, Türkiye
High School Diploma
09/2015 – 06/2019
High School
  • Team captain of football team, 1st place in Nike-sponsored tournament
  • 1st place in Spelling Bee contest
  • Volunteer activities: nursing homes, disability workshops, children's shelters
LeadershipTeam SportsLanguage SkillsCommunity ServiceSocial Responsibility

Interests & Hobbies

Beyond coding, here's what keeps me inspired and energized

Football

Playing & watching matches, analyzing team tactics

Spearfishing

Underwater hunting adventures in the Aegean Sea

History

Reading about ancient civilizations & world events

Sports Analysis

Data-driven insights into athletic performance

Fitness

Bodybuilding, strength training & healthy lifestyle

Sports History

Legendary moments & athletes that shaped sports

Photography

Capturing moments through street & nature photography

TV Series

Sci-fi, drama & documentary series enthusiast

Contact

Feel free to reach out for collaboration or just to say hi!

A detailed CV can be provided upon request for professional opportunities.

kubilaybirer@hotmail.com

kubicix

Kocaeli, Türkiye

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