Seryozha Khachatryan — Lead Full-Stack Engineer (AI-Driven Systems, Distributed Architecture & Payments)

Principal / Lead Full-Stack Engineer - EigerX (AI-Powered Multi-Tenant iGaming Platform)

Duration: Feb 2024 – Present

Summary:

• EigerX is a B2B multi-tenant iGaming platform enabling rapid launch and management of online casino businesses
• The project involved designing and implementing AI-driven operational systems, a scalable multi-tenant SaaS platform, and a full payment ecosystem integrating multiple PSPs

Responsibilities:

• Designed and implemented AI-powered operational systems using LLMs and agent-based workflows.
• Built AI agents for customer support automation, KYC verification, and risk management workflows.
• Developed prompt engineering and context management strategies for production AI systems.
• Integrated AI workflows with internal backoffice, payment, and compliance systems.
• Designed automation pipelines for operational decision-making and support processes.
• Worked on orchestration patterns for multi-step AI workflows and tool integrations.
• Architected a multi-tenant SaaS platform supporting multiple brands with scalable and isolated configurations.
• Owned end-to-end system architecture across payments, real-time data systems, and user management.
• Designed and implemented a distributed microservices architecture using event-driven communication (Kafka).
• Built high-performance real-time systems using WebSockets for live updates and high-frequency interactions.
• Architected and delivered a full payment ecosystem (crypto + fiat), integrating multiple PSPs (PayNetEasy, CoinPayments, Binance, QRMoney).
• Designed secure transaction flows handling sensitive financial data with high reliability and fault tolerance.
• Implemented Responsible Gambling systems (limits, restrictions, compliance mechanisms).
• Defined engineering standards, architecture guidelines, and best practices across the team.
• Led code reviews, mentored engineers, and improved system quality and delivery speed.
• Collaborated with product and stakeholders to deliver complex, high-impact features end-to-end.
• Integrated multiple game providers and aggregators (Alea, SofiSwiss, Betby).

Technologies: Typescript, Node.js, NestJS, Kafka, WebSockets, PostgreSQL, MongoDB, Redis, Docker, AWS (EC2, S3, RDS, Lambda, IAM), Terraform, Prisma, React, NextJS, Tailwind CSS, PayNetEasy, CoinPayments, Binance, QRMoney, AI: OpenAI, Claude, MCP, Function Calling, Agentic Workflows, Semantic Search, RAG, Prompt Engineering, Context Management, AI Agents

Lead Software Engineer - Github/NPM (Distributed Backend Services and Analytics Platform)

Duration: Mar 2021 – Jan 2024

Summary: Led the development and maintenance of distributed backend services and microservices for Github/NPM, focusing on scalable AWS infrastructure and data analytics pipelines to improve system performance and reliability.

Responsibilities:

• Led a team of 5 engineers and owned system architecture and delivery.
• Coordinated cross-team development and defined technical direction.
• Designed and maintained distributed backend services and microservices.
• Implemented AWS infrastructure, including Lambda, EventBridge, S3, and SNS.
• Built and optimized data pipelines and analytics workflows using Athena and S3.
• Improved system performance, logging, and reliability.
• Implemented secure data handling and system-level protections.
• Established CI/CD pipelines and deployment processes.
• Conducted code reviews and mentored developers.

Technologies: Typescript, Node.js, AWS (Lambda, EventBridge, S3, SNS), Athena, Docker, Terraform, CI/CD

Senior Software Engineer - Instigate Mobile (Full-Stack Optimization Platform)

Duration: Sep 2019 – Feb 2021

Summary: Developed and maintained a full-stack optimization platform focused on A/B testing and personalization to enhance user experience and system performance.

Responsibilities:

• Developed scalable backend services and frontend components.
• Integrated with Azure AD and distributed data systems.
• Improved system reliability and performance.
• Wrote unit tests and improved code quality standards.
• Collaborated closely with product and customers.

Technologies: Typescript, Node.js, React, Azure AD

Software Engineer - Instigate Mobile (Chatbot Platform with Configurable Decision Trees)

Duration: 2014 – 2019

Summary: Designed and implemented a chatbot platform featuring configurable decision trees and backend infrastructure for conversation management, integrating third-party NLP systems.

Responsibilities:

• Designed and implemented chatbot platform and backend systems.
• Implemented AWS-based file storage and deployment systems.
• Integrated third-party NLP systems such as Dialogflow and Alexa.
• Designed and implemented automated testing frameworks.
• Conducted performance testing and identified bottlenecks.
• Worked with large-scale data systems including Hadoop, Cassandra, and Vertica.
• Improved system reliability through testing and optimization.

Technologies: Typescript, Node.js, AWS, Dialogflow, Alexa, Hadoop, Cassandra, Vertica