About Me

Hello, I'm Aleksey Maltsev

Senior Software Engineer

I've been programming for fun and profit since 2014, focusing on distributed systems and highload applications. My main stack is C# and .NET, but I'm also proficient in Kotlin, Go, and TypeScript.

Fun fact: I was born on the 11th of April, just a day before Yuri Gagarin's flight. Poehali!

My Journey

2020–present

Infobip

As part of a distributed team, I developed and maintained over a dozen event-driven microservices that power real-time user segmentation. I was involved in migrating services and data from a MongoDB replica set to a sharded cluster, which improved performance significantly without any downtime. I also designed algorithms to balance workloads across services and independently created automation tools in Go and C# to support daily operations. Additionally, I contributed to documentation and led development on multiple segmentation-related epics.

C#KotlinGoTypeScriptReactASP.NETSpring BootKafkaMongoDB
2019–2020

Veeam

At Veeam, I worked on a RESTful integration between their Azure and Backup platforms, ensuring real-time synchronization of entities. I developed notification systems to provide progress tracking for long-running operations in the UI. I also helped with initiatives to improve engineering workflows, including a migration from TFS to Git and better code review tooling.

C#AzureTypeScriptReactASP.NETPostgreSQL
2017–2019

SKB Kontur

Took part in Implementing features for enterprise segment in one of the most popular accounting product in Russia. These features saved a lot of time for our biggest and richest customers, optimised user scenarios and helped in gaining success of our product.

C#.NET FrameworkTypeScriptReactASP.NETWCFMSSQL Server
2018

Freelancer @ Upwork

During my time as a freelancer, I improved a Xamarin-based language learning app by optimizing UI rendering and implementing MVVM architecture. My changes significantly boosted app responsiveness. I also integrated robust local storage Realm.

C#XamarinAndroidRealmMVVM
2015–2017

Pro IT

I worked on .NET-based enterprise software, optimizing LINQ and SQL queries to double request throughput in edge cases. I developed admin dashboards to streamline operations and created an internal framework for automated Excel report generation, which accelerated future development efforts.

C#.NET FrameworkASP.NETReactMSSQL ServerLINQ
2014–2015

KAI Development

My early work involved building internal dashboards to improve SEO workflows. I migrated performance-heavy logic to stored procedures in Transact-SQL, resulting in notable speed improvements for data-intensive processes.

C#.NET FrameworkPHPJavaScriptJavaAndroidMSSQL ServerTransact-SQL

Professional Interests

C#GoKotlinFullstackDistributed SystemsHighload AppsDatabase InternalsSystem DesignPerformanceMicroservicesNoSQL

Personal Projects

✈️

CarryFit

An online tool that helps travelers check if their carry-on luggage meets size requirements for different airlines worldwide. Simply enter your bag's dimensions to instantly see which of 150+ airlines will accept it as cabin baggage.

SvelteKit TailwindCSS TypeScript
🔄

MongoTransit

A tool for automatic replication of documents between MongoDB clusters. Supports iterative transfers, sharded collections, and configurable synchronization parameters, making it ideal for database migrations and data synchronization tasks.

C# MongoDB

Hobbies & Interests

📚

Reading

I enjoy reading books on technology, science, and other topics to learn new things.

🧗

Rock Climbing

I like rock climbing to stay active and enjoy the outdoors.

⛷️

Mountain Skiing

I enjoy mountain skiing in the winter.

Programming Challenges

I enjoy participating in coding challenges to sharpen my skills and explore new programming concepts.

Advent of Code

I've completed multiple years of Advent of Code challenges:

LeetCode

I practice algorithmic problem solving on LeetCode to improve my coding efficiency and understanding of data structures.

Contact

Interested in collaborating or just want to say hello? Feel free to reach out.

© 2025 | Aleksey Maltsev