Konstantin Danilkov
@konstantindanilkov
Principal Backend Engineer at Xpence who coded a fintech platform processing millions of transactions at 99.9% uptime.
LithuaniaWhat I'm looking for
At Xpence Ltd, I built and personally coded the core of a fintech platform from scratch, developing .NET microservices and integrations for card processing, payments, and banking. The platform processed millions of transactions at 99.9% uptime.
I built backend AI features at Xpence, including a RAG customer-support system and services for transaction categorization and merchant enrichment. I also ran production operations across three countries and implemented PCI DSS v3 Level 2 compliance.
Through IT' Summer Ltd, my consultancy, I delivered enterprise applications and data-processing systems, including neural-network solutions that automated about 70% of manual data entry. I’m seeking a remote, hands-on senior or principal engineering role, a founding engineer role, or a contract product-build role.
Experience
Work history, roles, and key accomplishments
Principal Backend Engineer / Architect
Xpence Ltd
Mar 2018 - Present (8 years 7 months)
Built and coded the core fintech platform from scratch, designing .NET microservices for the MENA region. Led a small full-stack team and maintained PCI DSS Level 2 compliance.
Independent Consultant / Developer
IT' Summer Ltd
Feb 2013 - Dec 2024 (11 years 10 months)
Ran a consultancy delivering enterprise solutions, including VSTO, MVC, and React applications serving 10,000+ daily users. Developed neural-network and data-processing systems automating ~70% of manual data entry.
Software Developer / Architect
Money Nanny Personal Adviser
Oct 2016 - Apr 2018 (1 year 6 months)
Built Money Nanny Bot using Xamarin, LUIS, and Web API 2 with 85% NLP accuracy. Rebuilt PFA v2 on EF, cutting query time by ~50% and improving performance by ~35%.
Technical Project Manager / Developer
ClearPeople Ltd
Feb 2013 - Sep 2013 (7 months)
Migrated legacy systems to SharePoint 2010/2013 Online for 3 clients with 100% data integrity. Built data-processing handling 500K+ records per day.
Systems Architect / Developer
ATEA Ltd
Mar 2009 - Feb 2013 (3 years 11 months)
Delivered SharePoint 2010 and .NET solutions across 15+ EU-level projects. Built architecture supporting 50,000+ concurrent users.
IT Manager / PM
AB AXIS Industries
Jan 2008 - Dec 2009 (1 year 11 months)
Managed IT operations and projects as IT Manager and Project Manager.
System Architect / Team Lead & Developer
ALNA Software
Jan 2004 - Dec 2007 (3 years 11 months)
Served as System Architect, Team Lead, and Developer, contributing to software projects.
Information System Developer / Team Lead
JSC Axxos
Jan 1998 - Dec 2004 (6 years 11 months)
Developed information systems and led a team as Information System Developer and Team Lead.
Education
Degrees, certifications, and relevant coursework
Moscow Institute of Aviation University
M.Sc., Computer Engineering & Network Engineering
Earned a Master of Science in Computer Engineering and Network Engineering.
Project Management Institute
PMP, Project Management
Holds the Project Management Professional (PMP) certification.
Microsoft
MCPD, Software Development
Holds Microsoft Certified Professional Developer (MCPD) certification.
Microsoft
MCTS, Technology
Holds Microsoft Certified Technology Specialist (MCTS) certification.
Microsoft
SharePoint Developer 2010, SharePoint Development
Holds SharePoint Developer 2010 certification from Microsoft.
IBM
AI Developer Professional Certificate, Artificial Intelligence
Completed the IBM AI Developer Professional Certificate program.
Microsoft
Back-End Development with .NET, Back-End Development
Completed the Back-End Development with .NET certification.
Tech stack
Software and tools used professionally
Kubernetes
Flutter
Xamarin
PostgreSQL
MongoDB
Microsoft SQL Server
.NET Core
ASP.NET Core
Redis
Terraform
Azure DevOps
React
JavaScript
Python
C#
PowerShell
Logstash
Kafka
Grafana
Kibana
Prometheus
Consul
Elasticsearch
TypeScript
Docker
SQL
TeamCity
Rundeck
Temporal
Qdrant
AutoGen
Pinecone
Bash
pgvector
ASP.NET MVC
Entity Framework Core
Dapper
AWS
Availability
Location
LithuaniaAuthorized to work in
Website
xpence.comSalary expectations
Social media
Job categories
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