Hello! 👋

I'm Janserik Suinbai

Senior iOS & Backend Engineer

Janserik Suinbai portrait

About Me

I'm a Senior Software Engineer with more than eight years of experience building native iOS applications and backend services. My primary expertise is Swift, SwiftUI, UIKit, and Objective-C, complemented by backend development in Golang. Throughout my career, I've worked on enterprise and consumer products across banking, fintech, e-commerce, and mobile platforms. Outside of work, I enjoy building personal products and maintaining a homelab environment based on Proxmox, TrueNAS, OPNsense, Docker, and 10Gb networking, where I explore infrastructure, cloud-native technologies, and AI.

Swift SwiftUI UIKit Objective-C Golang REST APIs GraphQL MongoDB PostgreSQL Docker Proxmox TrueNAS OPNsense Cloudflare Git

Projects

01

QazEpos

A mobile platform dedicated to preserving and sharing traditional Kazakh epics and cultural heritage. Built as a native iOS application with a custom Golang backend for authentication, content management, and push notifications.

SwiftUIKitGolangMongoDBREST API
02

BonMenu.kz

Founder and developer of an online restaurant menu and ordering platform. Designed the product architecture, implemented frontend and backend components, and managed deployment and operations.

Vue.jsGolangMongoDBREST APIDocker
03

QuranKarim.kz

Created and maintain an online platform dedicated to the Holy Quran, providing users with convenient access to audio recitations and Islamic content. Built and deployed the project using modern web technologies and cloud infrastructure.

Vue.jsGolangMongoDBDockerCloudflare
04

Homelab Infrastructure

Designed and maintain a complete self-hosted environment featuring Proxmox virtualization, TrueNAS storage, OPNsense firewall, Docker services, Jellyfin media server, Cloudflare integration, and 10Gb networking.

ProxmoxTrueNASOPNsenseDockerCloudflare

Experience

Senior iOS & Backend Engineer

Independent Consulting

2023 - Present
  • Develop native iOS applications and backend services for enterprise and startup clients.
  • Design scalable REST APIs and cloud-native solutions using Golang.
  • Build and maintain personal software products and infrastructure projects.

Senior iOS Software Engineer

Bank of America

2022 - 2023
  • Developed and maintained enterprise mobile banking features.
  • Improved application performance and reliability for large-scale production systems.
  • Collaborated with cross-functional Agile teams using modern iOS architectures.

Senior iOS Software Engineer

Amazon

2021 - 2022
  • Contributed to the Amazon Glow iOS application.
  • Built features using SwiftUI and MVVM architecture.
  • Worked closely with distributed engineering teams in an Agile environment.

Senior iOS Software Engineer

Citibank

2020 - 2021
  • Implemented new mobile banking functionality and backend integrations.
  • Maintained high code quality through peer reviews and testing.
  • Delivered secure, high-performance native iOS solutions.

Education

M.S. Computer Science (OMSCS)

Georgia Institute of Technology

2024 - Present
  • Specialization in Computing Systems.
  • Advanced coursework in distributed systems, networking, and software engineering.

Bachelor's & Master's Equivalent Education

Applied Computer Science

  • Academic foundation in software engineering and computer science.
  • Focused on algorithms, programming, and system design.