Іван

IVAN LESHKEVICH
SENIOR .NET ENGINEER
Core Skills

Legacy modernization & end-to-end migrations
System design & technical decision-making
Async systems & distributed architecture
Skills
Profile
Languages
Senior .NET Engineer, 8+ years of commercial experience. Last 3 years
English
leading migration of a 20-year-old OMS from VBA/.NET Framework to
Programming Languages async .NET services on Kubernetes. Focus on distributed systems, async
architecture, and owning large migrations end-to-end. BSc in Computer
.NET (C#) Science.
SQL
JavaScript Experience
TypeScript
VBA (legacy) E-COMMERCE(ORDER MANAGEMENT)
Ecentria, Chicago | 2022 - Present
Frameworks Senior Software Engineer
ASP.NET Core • Led migration of a 20-year-old OMS from VBA/.NET Framework to
Entity Framework async .NET services on Kubernetes
NHibernate • Rewrote ~60k lines of GOTO-driven VBA into an async .NET service
Nextjs — 25× throughput per core; horizontal autoscaling in k8s replaced
React manual server provisioning
Angular • Co-designed shared RabbitMQ library with distributed tracing, now
SignalR used across all company .NET services

Databases & Messaging
• Driving AI-assisted tooling adoption: built internal code review tool
MS SQL CRM(LEAD MANAGEMENT) PART-TIME
Tiebreak, Sofia | 2021 - 2024
PostgreSQL
Senior Full-Stack Developer
Elasticsearch
Redis • Backend on Clean Architecture / DDD / CQRS: domain model,
command handlers, Elasticsearch read-side projections
RabbitMQ
AWS: SNS, SQS • Built WebRTC dialer POC with progressive-dialer integration — auto-
connect agents on live answer with lead context preloaded
DevOps • Led ExtJS → Next.js/React/TypeScript frontend migration end-to-
end after my POC was approved by business
Docker
Jenkins
• Twilio/WhatsApp integrations on AWS Lambda; mentored new
hires, reviewed code
AWS
Azure NDA
Terraform Intetics, Kyiv | 2021
Kubernetes .NET Developer
Common • Server-side development in a large team (80 people)
• Proposing component-level solutions, participating in technical
Jira discussions
AI-assisted
development PHARMACY BA + IPO INTELLIGENCE
Itransition, Minsk | 2018 - 2021
.NET Developer
Contact
 Odesa
• Feature development and backend engineering across
BI/Pharmacy and Capital Markets (IPO Intelligence) domains
 [open contact info](look above in the "contact info" section)
 [open contact info](look above in the "contact info" section)
• .NET Framework, ASP.NET, MSSQL, Entity Framework; feature
delivery by spec, code review, technical documentation
 [open contact info](look above in the "contact info" section)
leshkevich