Igor – Kubernetes, Golang, AWS

A fintech startup enabling emerging-market businesses to settle foreign-currency obligations via stablecoin (USDT) conversion.

• Architected a 12-microservice, event-driven payments platform on AWS Lambda and API Gateway, orchestrating a fully async transaction lifecycle for high-value transactions.
• Chose serverless over Kubernetes/EKS to minimize operational overhead for a low-volume, high-value, latency-tolerant workload.
• Built a GitHub Actions CI/CD pipeline with automatic DEV deployments and governed tag-based PROD releases.
• Designed a database-level immutability framework with append-only, versioned records and an RBAC/ACL system enforced via SQL functions.
• Built a multi-agent AI development workflow using Claude Code that cut developer time on routine engineering tasks.
• Led a 4-person engineering team and directly mentored 2 backend engineers through code review.
• Established secure VPN infrastructure with role-based access controls for production and financial systems.

A major post-acquisition infrastructure migration followed by full-stack delivery after a company-wide reorganization.

• Led a 10-month, zero-downtime migration of core services and data infrastructure from AWS and GCP to on-premises.
• Reimplemented 20+ cron jobs as Airflow DAGs and delivered select service rewrites from Go and .NET Core to Java and Go.
• Used parallel duplicate services and weighted DNS routing to validate live traffic before full cutover.
• Directed redesign of the real-time data pipeline for on-prem constraints, replacing a Flink-based streaming architecture with an in-house Spark and Airflow aggregation solution.
• Reimplemented Kafka producers in Java per platform requirements.
• Migrated CDN, object storage, and search infrastructure, and rebuilt the observability stack to preserve monitoring continuity.
• Transitioned to full-stack delivery and owned quarterly features end-to-end from design through production deployment and demo.
• Continued performing code reviews for the team.

A contextual video advertising platform pairing publisher content with relevant video from creators and brands to boost engagement and monetization.

• Led a team of 7 and formally owned infrastructure enablement for other engineering teams.
• Built and operated a high-throughput event pipeline using Kafka, Flink, and BigQuery, ingesting up to 40,000 events per second.
• Architected an in-house AdServer returning ranked ad-source lists with a ranking algorithm optimizing revenue and fill rate.
• Operated about 30 microservices and 50 scheduled jobs on Kubernetes in AWS with traffic-based autoscaling.
• Maintained observability by monitoring backpressure, response codes, and critical event volume as core system health signals.

A video-on-demand platform and syndication dashboard powering the platform's ad-monetization business.

• Built backend and frontend features for a video-on-demand platform using .NET 4.x, ASP.NET MVC, and JavaScript/jQuery.
• Led the Syndication team and owned an internal dashboard that managed integrations with demand-side platforms and enabled business teams to configure and run ad campaigns.
• Automated builds and deployments using TeamCity and AWS.
• Strengthened testing practices across the development lifecycle.