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Grazyna Leskiw

@grazynaleskiw

Senior Backend Software Engineer at Hyatt Hotels Corporation who redesigned Go payment services, increasing throughput by 35%.

Poland

Message

At Hyatt Hotels Corporation, I redesigned key Go backend services, increasing payment processing throughput by 35% while meeting multi-jurisdiction regulatory standards. I also deployed Kubernetes microservices for investor onboarding and KYC/AML compliance, achieving 99.99% uptime.

Previously, I developed Go services for financial compliance and payments at Twitter and The Software House. My work included integrating AI-assisted development with OpenAI API and LangChain, automating onboarding workflows, and building secure financial reporting and transaction systems.

Experience

Work history, roles, and key accomplishments

Senior Backend Software Engineer

Hyatt Hotels Corporation

Jan 2023 - Jan 2026 (3 years)

Led redesign of backend services in Go, improving payment processing throughput by 35% and ensuring multi-jurisdiction compliance. Implemented AI-assisted development workflows and architected Kubernetes-based microservices for investor onboarding and KYC/AML compliance.

Go AI assisted Development OpenAI API Kubernetes Microservices REST APIs gRPC CI CD Jenkins CircleCi Prometheus Grafana AWS Azure KYC AML Payment Processing Test Driven Development Code Review

Senior Backend Engineer, Compliance & Payments

Twitter

Apr 2020 - Dec 2022 (2 years 8 months)

Developed scalable Go microservices for multi-jurisdiction financial compliance and payments infrastructure with KYC/AML integration. Integrated LangChain in AI-driven development pipelines and designed secure OAuth2 and JWT-based access control systems.

Go Microservices KYC AML Lang Chain AI OAuth JWT RBAC PostgreSQL Redis CI CD Jenkins CircleCi Prometheus Grafana Domain Driven Design REST APIs

Backend Software Engineer, Financial Platforms

The Software House

Oct 2014 - Mar 2020 (5 years 5 months)

Built and maintained backend services in Go for investor onboarding, payments, and KYC/AML processing. Implemented Terraform-based infrastructure as code and Kubernetes orchestration on AWS and GCP.