Software Architecture
I've been honing my skill of software design for two decades now, discovering new facets of it every day. Clean Code, Functional Programming, traditional OOP are essential tools in my toolbelt.
System Design
Designing complex system and their interactions is something I spend a lot of time thinking about and doing.
Coding
I wrote code in more than 20 programming languages on very different platforms. I love to find better algorithms, track down bugs, disassemble things and optimize for performance.
DevOps
I wrote code, I've deployed code, I've developed internal deployment pipeline, I've built systems that deployed customer's code 50,000 times a day. I'm a fan of Kubernetes and Docker, but I've done it all.
Lead and Mentor
I know how to lead, remove obstacles, and help people reach their true potential.
Learn New Things
Learning is a life-long passion for me. If I have some free time — I'm always learning something new or getting more in-depth in the things I've known.
Postmark — Transactional Email Delivery Service.
2020
Data Science
Postmark is a large email services provider that generates an extensive amount of data that needs to be analyzed.
2020
Data Analytics Pipeline for Anomaly Detection and Suppression Based on Apache Spark
Technical Lead.
Conveyor — Version control meets task management.
2017 — 2020
Continuous Integration and Deployment Engine
A CI/CD service tightly integrated with Conveyor application for customer's use.
2017
Deployment Engine Capable of Custom Script Execution for Conveyor Customers
Technical Lead, DevOps.
- Highly-available, fault-tolerant actor based design.
- Microservice architecture, integrated through HTTP API.
- Real-time log streaming.
- Docker-based execution environment.
Desktop Client
Conveyor is a version control system integrated very tightly with its desktop application.
That integration allows Conveyor to be more useful but puts much pressure on the client, making it the piece of the system that users use the most.
That integration allows Conveyor to be more useful but puts much pressure on the client, making it the piece of the system that users use the most.
2017
macOS-only Desktop Application
Senior Software Engineer.
2018 — 2020
Cross-platform Desktop Application
Technical Lead, DevOps, Training.
- Implemented 50K LOC desktop client from scratch, based on Electron, TypeScript, and React.
- Successful training of Ruby and JavaScript developers and designers for TypeScript, Electron, and React.
- Created offline-first desktop client architecture, handling network failures transparently and with minimal effect on the user.
- Designed and implemented entirely reactive UI architecture, instantly responding to changes in the shared data from other clients.
2018 – 2019
Distributed, Offline First Data Pipeline for Desktop Client
Technical Lead, DevOps.
- Created network failure resistant, offline first, Cloudant ↔︎ PouchDB synchronization service.
- Designed and lead the development of two-way MySQL and Cloudant synchronization service.
- Designed and created high-throughput, low-latency Cloudant to MySQL change following service in NodeJS.
Google Cloud Migration
Development started on dedicated hosting servers in ServerCentral, but due to the capacity planning needed to move to a separate environment.
Google Kubernetes Engine was chosen as one of the leaders to ensure future scalability and other deployment efforts.
Google Kubernetes Engine was chosen as one of the leaders to ensure future scalability and other deployment efforts.
2018
Migrating Conveyor from Dedicated Hosting to Google Cloud and Google Kubernetes Engine
Technical Lead, DevOps, Training.
- Migration from custom ServerCentral hosting environment to Google Cloud Platform.
- Containerized all the services using Docker and Kubernetes.
- Creating completely software-defined, auto-scaling, and auto-recovering infrastructure with Kubernetes.
- Automated deployments and Docker image building procedures.
- Deployed and validated the performance of the ObjectiveFS storage system for repository storage.
Wildcloud — Internal Resource Provisioning Service.
2016 — 2017
Internal Server Provisioning
At that moment, a lot of Wildbit servers resided on dedicated physical machines running XenServer. We wanted a system that provisions the machines based on the requirements balances them across hypervisors and registers them in Infoblox for DHCP configuration and inventory keeping.
2016 — 2017
Web Console and Backend for Provisioning Servers
Technical Lead, DevOps.
- Created a backend system for provisioning, controlling, and balancing VMs through XenServer API.
- Created web application in Play Framework for provisioning and monitoring the instances. The user has a choice of predefined resource types and a list of supported images.
- Created a backend and an API for connecting to the Infoblox system for automatic provisioning of IPs, storing service details, and keeping inventory.
DeployBot — Continuous Deployments as a Service.
2013 — 2017
Standalone Deployments Service
With deployments being one of the most successful features of Beanstalk, it was decided to create a separate product just for deployments, originally called dploy.io, and later renamed into DeployBot.
2013 — 2017
Separate Deployment SaaS Product Based on Beanstalk
Project and Technical Lead, DevOps, Customer Support Engineer.
- Extracted and re-imagined the code from Beanstalk codebase into a separate product.
- Designed and implemented significant upgrades to deployment experience from Beanstalk, like Docker-based environments with custom container support. Customizable build steps, and many more.
- Lead development and project roadmap with a second developer on the team.
- Designed, built, and maintained underlying server infrastructure.
2016
Acquisition
Project and Technical Lead, DevOps, Training.
- After the acquisition offer, I was in charge of the preparation of the product for sale.
- Onboarded the new development team, which involved documentation, personal training, and pre-sale code preparations.
- Migrated from the custom Chase Paymentech billing system to Stripe.
- Migrated the server infrastructure from ServerCentral to AWS.
Beanstalk — Version Control with Human Face
2007 — 2015
Web Application
Beanstalk is a version control hosting that one of the first combined the VCS hosting service and a useful web application for collaborating on the code hosted in the repositories.
Beanstalk web application is a high traffic service, with more than 2-3m views per month, with stringent requirements for availability.
Beanstalk web application is a high traffic service, with more than 2-3m views per month, with stringent requirements for availability.
2007 — 2012
Main Web Application
Original Technical Lead, DevOps, Customer Support Engineer.
- Architected and implemented the Ruby on Rails application.
- Architected and implemented the backend infrastructure.
- Designed, built, and maintained underlying server infrastructure.
- Developed and extended Git, Subversion, and Mercurial support libraries.
- Oversaw scaling for growth from 0 to millions of page views a month.
2012 — 2014
Commit Caching Pipeline
Technical Lead, DevOps.
- Architected and implemented a robust commit caching pipeline, processing 50,000 to 100,000 incoming commits.
- Pipeline implementation resulted in a 30x increase in performance in critical areas, and dramatically reduced service interruptions for customers.
2013
Version Control RPC Service
Technical Lead.
- Architected and implemented a service that performed a lot of expensive operations on JVM-backed JGit and SVNKit, using Clojure. That helped offload some tasks from the Ruby application and resolve both the performance issues in critical areas and open up possibilities for new features.
2013 — 2015
Version Control Hosting
A critical part of Beanstalk's functionality is hosting Git, Subversion, and, at one point, Mercurial repositories and providing fast, uninterrupted access to those for the users.
On an average day, Beanstalk can be processing from tens, to hundreds of thousands of incoming commits.
On an average day, Beanstalk can be processing from tens, to hundreds of thousands of incoming commits.
2007 — 2014
Git and Subversion Hosting Platform
Technical Lead.
- Designed, implemented, and maintained the highly available Git and Subversion hosting backends.
- Designed, built, and maintained underlying server infrastructure.
- Implemented and maintained various custom patches for SVN modules, Apache, OpenSSH, Git HTTPS that were necessary because of the nuances of mass-hosting version control repositories.
2013 — 2014
Geographically Distributed Git Delivery Service
Technical Lead, DevOps.
- Architected and implemented a novel solution for synchronization of multiple read/write mirrors of a single repository across regions.
- Architected and created a solution for transparent and automatic mirror discovery for customers depending on their region.
- Designed, built, and maintained underlying server infrastructure.
Deployments
Automated deployments feature is a staple for Beanstalk users. Due to its nature, it's very sensitive to any interruptions or correctness issues.
I was in charge of the architecture, implementation, maintenance, and advanced customer support for the deployments feature throughout all my years on Beanstalk.
On an average day, Beanstalk would run up to 50,000 customers' deployments.
I was in charge of the architecture, implementation, maintenance, and advanced customer support for the deployments feature throughout all my years on Beanstalk.
On an average day, Beanstalk would run up to 50,000 customers' deployments.
2008 — 2014
Continuous Deployment Service
Technical Lead, DevOps.
- Architected and implemented a highly available deployment engine, serving up to 50,000 customers' deployments daily.
- Provided ongoing technical day-to-day support for a pool of hundreds of thousands of users.
- Designed, built, and maintained underlying server infrastructure.
- Evolved the engine through a series of rehauls to meet the demands of changing time.