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Professional Engineer architected and maintained multi-region AWS infrastructure for Salesforce's CRM platform and Flow automation services using EKS, ECS, Fargate, and EC2, achieving 99.97% SLO adherence and reducing infrastructure provisioning time by 44% through full Terraform IaC adoption. Led GitHub Actions CI/CD pipelines across 18+ CRM platform microservices with security gates, canary deployments, and rollback workflows, reducing mean deployment time by 31% and eliminating manual release steps. Established multi-tenant security controls (OAuth token isolation, secrets rotation, IAM least privilege, VPC segmentation) and implemented Datadog SLO-based observability to reduce MTTR for P0 failures by 47%.…Professional Engineer architected and maintained multi-region AWS infrastructure for Salesforce's CRM platform and Flow automation services using EKS, ECS, Fargate, and EC2, achieving 99.97% SLO adherence and reducing infrastructure provisioning time by 44% through full Terraform IaC adoption. Led GitHub Actions CI/CD pipelines across 18+ CRM platform microservices with security gates, canary deployments, and rollback workflows, reducing mean deployment time by 31% and eliminating manual release steps. Established multi-tenant security controls (OAuth token isolation, secrets rotation, IAM least privilege, VPC segmentation) and implemented Datadog SLO-based observability to reduce MTTR for P0 failures by 47%.

Grzegorz Michalak

Full Stack Developer, Back-End Developer, DevOps Developer, +1

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Professional Engineer architected and maintained multi-region AWS infrastructure for Salesforce's CRM platform and Flow automation services using EKS, ECS, Fargate, and EC2, achieving 99.97% SLO adherence and reducing infrastructure provisioning time by 44% through full Terraform IaC adoption. Led GitHub Actions CI/CD pipelines across 18+ CRM platform microservices with security gates, canary deployments, and rollback workflows, reducing mean deployment time by 31% and eliminating manual release steps. Established multi-tenant security controls (OAuth token isolation, secrets rotation, IAM least privilege, VPC segmentation) and implemented Datadog SLO-based observability to reduce MTTR for P0 failures by 47%.…Professional Engineer architected and maintained multi-region AWS infrastructure for Salesforce's CRM platform and Flow automation services using EKS, ECS, Fargate, and EC2, achieving 99.97% SLO adherence and reducing infrastructure provisioning time by 44% through full Terraform IaC adoption. Led GitHub Actions CI/CD pipelines across 18+ CRM platform microservices with security gates, canary deployments, and rollback workflows, reducing mean deployment time by 31% and eliminating manual release steps. Established multi-tenant security controls (OAuth token isolation, secrets rotation, IAM least privilege, VPC segmentation) and implemented Datadog SLO-based observability to reduce MTTR for P0 failures by 47%.

Available to hire

Professional Engineer architected and maintained multi-region AWS infrastructure for Salesforce’s CRM platform and Flow automation services using EKS, ECS, Fargate, and EC2, achieving 99.97% SLO adherence and reducing infrastructure provisioning time by 44% through full Terraform IaC adoption.
Led GitHub Actions CI/CD pipelines across 18+ CRM platform microservices with security gates, canary deployments, and rollback workflows, reducing mean deployment time by 31% and eliminating manual release steps. Established multi-tenant security controls (OAuth token isolation, secrets rotation, IAM least privilege, VPC segmentation) and implemented Datadog SLO-based observability to reduce MTTR for P0 failures by 47%.

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Work Experience

Senior Software Engineer at Salesforce

January 1, 2023 - Present

Led full stack development of Salesforce CRM analytics and Flow automation builder, building modular React/TypeScript UI architecture that improved reliability by 35% while maintaining 99.97% uptime across global enterprise deployments. Designed and implemented scalable Node/NestJS REST and GraphQL APIs backed by PostgreSQL (Prisma), serving workflow automation state, metadata, permissions, and reporting data for thousands of CRM tenants. Built event-driven automation pipeline services in Python on AWS Lambda integrated with SQS/SNS/Step Functions to process hundreds of millions of CRM trigger events daily, reducing automation execution latency by 38%. Implemented multi-tenant data isolation, OAuth 2.0 connected app token flows, and secrets rotation using AWS Secrets Manager, enforcing zero-trust access patterns. Operated services on EKS/ECS/Fargate/EC2 with containerized deployments and CI/CD via GitHub Actions; monitored with Datadog APM and SLA-based alerting. Mentored 4 mid-level e

Senior Full Stack Engineer at Twilio

January 1, 2021 - December 1, 2022

Built Twilio messaging and voice campaign management console using React/TypeScript and Redux Toolkit, supporting 250,000+ active developer/enterprise accounts and reducing dashboard load time by 32%. Developed scalable Node/NestJS APIs backed by PostgreSQL (Prisma) to serve real-time delivery status, campaign analytics, phone provisioning, and webhook configuration data. Implemented Python-based event processing pipelines on AWS Lambda integrated with SQS/SNS, processing billions of delivery receipts daily and reducing event reporting latency by 35%. Created programmable webhook retry and delivery guarantee services using Node workers with exponential backoff, improving webhook success rate from 94.2% to 99.6%. Operated infrastructure on EKS/EC2 with Docker and GitHub Actions CI/CD; monitored with Datadog SLA alerting. Built internal analytics visualizations using D3.js and Highcharts.js.

Full Stack Engineer at HubSpot

January 1, 2019 - December 1, 2020

Developed HubSpot marketing automation and contact segmentation platform using React/TypeScript and MUI, supporting 100,000+ active marketing teams and reducing campaign builder load time by 29%. Built backend services with Node/Express connected to PostgreSQL/MySQL for contact lifecycle management, email scheduling, deal pipeline state transitions, and CRM property management. Created Python ETL pipelines aggregating engagement and campaign performance data for BI consumption, reducing manual reporting overhead by 37%. Implemented internal analytics dashboards with D3.js for open rates, conversion funnels, and deal stage velocity. Containerized dev/staging environments and introduced Kubernetes orchestration to reduce provisioning time by 42% and eliminate configuration drift. Configured AWS deployments with EC2/S3 and CI workflows using Jenkins; improved error monitoring by integrating Sentry.

Full Stack Engineer at Intercom

September 1, 2016 - December 1, 2018

Contributed to Intercom customer messaging and live chat platform using React/TypeScript and Chakra UI, supporting 30,000+ active business accounts and reducing inbox rendering latency by 26%. Built Node/Express backend services with PostgreSQL/MySQL to manage conversation threading, contact attributes, automated message rule evaluation, and webhook delivery. Implemented Python background processing jobs to aggregate engagement metrics and improve support team response-time analytics, reducing manual overhead by 31%. Set up AWS deployments using EC2/S3 with Jenkins-based automated release workflows. Integrated third-party services (CRM/help desk/Slack webhook notifications) and added Sentry for proactive production monitoring.