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I'm Aleksei Efremov, a Senior Software Engineer specializing in designing and evolving scalable distributed and cloud-native systems. I have 8+ years of experience working with C#/.NET, AWS, and event-driven architectures to deliver high-performance backends for enterprise SaaS, document processing, and real-time communication platforms. I also enjoy front-end work with React and Angular, and I lead teams through architecture and modernization efforts with a strong focus on reliability, scalability, and operational efficiency. I thrive on end-to-end ownership of business-critical solutions, collaborating with stakeholders to translate complex requirements into robust, maintainable software. My aim is to build systems that scale gracefully, are easy to operate, and empower teams to deliver value rapidly across the full software delivery lifecycle.…I'm Aleksei Efremov, a Senior Software Engineer specializing in designing and evolving scalable distributed and cloud-native systems. I have 8+ years of experience working with C#/.NET, AWS, and event-driven architectures to deliver high-performance backends for enterprise SaaS, document processing, and real-time communication platforms. I also enjoy front-end work with React and Angular, and I lead teams through architecture and modernization efforts with a strong focus on reliability, scalability, and operational efficiency. I thrive on end-to-end ownership of business-critical solutions, collaborating with stakeholders to translate complex requirements into robust, maintainable software. My aim is to build systems that scale gracefully, are easy to operate, and empower teams to deliver value rapidly across the full software delivery lifecycle.

Aleksei Efremov

Full Stack Developer, Back-End Developer, Web Developer, +2

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I'm Aleksei Efremov, a Senior Software Engineer specializing in designing and evolving scalable distributed and cloud-native systems. I have 8+ years of experience working with C#/.NET, AWS, and event-driven architectures to deliver high-performance backends for enterprise SaaS, document processing, and real-time communication platforms. I also enjoy front-end work with React and Angular, and I lead teams through architecture and modernization efforts with a strong focus on reliability, scalability, and operational efficiency. I thrive on end-to-end ownership of business-critical solutions, collaborating with stakeholders to translate complex requirements into robust, maintainable software. My aim is to build systems that scale gracefully, are easy to operate, and empower teams to deliver value rapidly across the full software delivery lifecycle.…I'm Aleksei Efremov, a Senior Software Engineer specializing in designing and evolving scalable distributed and cloud-native systems. I have 8+ years of experience working with C#/.NET, AWS, and event-driven architectures to deliver high-performance backends for enterprise SaaS, document processing, and real-time communication platforms. I also enjoy front-end work with React and Angular, and I lead teams through architecture and modernization efforts with a strong focus on reliability, scalability, and operational efficiency. I thrive on end-to-end ownership of business-critical solutions, collaborating with stakeholders to translate complex requirements into robust, maintainable software. My aim is to build systems that scale gracefully, are easy to operate, and empower teams to deliver value rapidly across the full software delivery lifecycle.

Available to hire

I’m Aleksei Efremov, a Senior Software Engineer specializing in designing and evolving scalable distributed and cloud-native systems. I have 8+ years of experience working with C#/.NET, AWS, and event-driven architectures to deliver high-performance backends for enterprise SaaS, document processing, and real-time communication platforms. I also enjoy front-end work with React and Angular, and I lead teams through architecture and modernization efforts with a strong focus on reliability, scalability, and operational efficiency.

I thrive on end-to-end ownership of business-critical solutions, collaborating with stakeholders to translate complex requirements into robust, maintainable software. My aim is to build systems that scale gracefully, are easy to operate, and empower teams to deliver value rapidly across the full software delivery lifecycle.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Russian

Fluent

German

Advanced

Work Experience

Senior Software Engineer at EPAM Systems

July 1, 2023 - December 1, 2025

Led a team of 7 engineers delivering cloud-native distributed solutions across 40+ microservices using .NET 8, React, and AWS. Implemented customer-facing reporting services with multiple auth mechanisms and custom data schema/search capabilities. Optimized hedging report workflows to reduce processing costs by ~50% and double execution speed. Improved document generation pipelines for thousands of daily financial and publishing documents and concurrent multi-document processing. Redesign of high-volume follow-up email workflows reduced concurrency issues and operational costs. Collaborated on CI/CD and release processes for reliable delivery across distributed services. Engaged with business stakeholders for feature discovery, delivery planning, and release coordination.

Senior Software Developer at Aurus LLC

August 1, 2021 - November 1, 2022

Developed backend and frontend for a high-throughput conferencing platform supporting tens of thousands of concurrent participants. Implemented asynchronous processing improvements with Quartz.NET and SignalR; designed system-wide health checks; optimized expression tree-based filtering and query execution for large datasets; introduced caching for CMS data; improved calendar generation and timezone handling; contributed to containerized delivery pipelines (Docker) and architecture documentation.

Lead Software Developer at EasyData

April 1, 2019 - June 1, 2021

Led development of multi-tenant OCR and data-capture platform built around ABBYY FlexiCapture; onboarded 20+ SMB customers. Managed backend and client-side development across .NET Framework/.NET Core, WPF, and ASP.NET; implemented secure multi-tenant data isolation and OAuth 2.0 authentication; migrated legacy desktop client to .NET Core for cross-platform support; built Salesforce and Xero integrations; developed synchronization for hybrid cloud/on-prem deployments; led production troubleshooting and performance optimizations.

Middle Software Implementation Engineer at ABBYY

March 1, 2017 - April 1, 2019

Developed custom integrations and extensions for ABBYY FlexiCapture using REST, SOAP, Entity Framework, and ADO.NET; delivered enterprise solutions across Japan, Australia, and Europe; diagnosed and resolved production incidents and infrastructure issues in enterprise document-processing environments; contributed to internal framework to accelerate custom solution delivery; integrated external OCR technologies including Tegaki OCR for Japanese-language workflows; frequently acted as acting technical lead, supporting architectural decisions and customer communication.

Software Engineer (Game Logic / Engine Development) at Elefun Games

February 1, 2014 - June 1, 2016

Developed gameplay logic and engine-level functionality using Lua and C++; proposed, designed, and implemented reusable event-driven systems adopted across multiple company projects and used in 10+ released game titles; refactored and improved shared framework components (achievement, task, lip-sync, companion/sidekick systems); performed low-level modifications to the proprietary C++ game engine; delivered complex mini-games requiring advanced state management; substituted for the lead developer for technical coordination.