Aug 2021 – Sep 2023 · 2 yrs 1 mo · Riga, Latvia · Remote

• Leading all aspects of building most advanced PaaS solution to connect with Blockchains and Cryptocurrency exchanges within single unified API, from stage zero to production ready.
• Designing the architecture for the microservices infrastructure, preparing tasks for frontend, backend, and DevOps teams, and actively participating in the development of backend microservices.
• Tech stack:
• Cloud providers: Netlify, DigitalOcean, AWS, Azure
• Deployment: Kubernetes/Helm/Ansible
• Language / runtime: Typescript/NodeJS
• API: REST, Websockets
• Datastores: MySQL, Redis, QuestDB, Cloud object storage
• Message brokers: NATS, Kafka
• Logging and monitoring: Graylog, Jaeger, Prometheus, Grafana
• Backend microservices framework: Moleculer
• Frontend framework: Nuxt

May 2020 – Sep 2023 · 3 yrs 4 mos · Riga, Latvia

Dec 2019 – Apr 2020 · 4 mos · Riga, Latvia · On-site

• Developing new features, refactoring and maintaining legacy code base according best practices of P2P lending marketplace project.
• Mostly take part in backend where PHP and Laravel was main stack.

Sep 2017 – Nov 2019 · 2 yrs 2 mos · Riga, Latvia

• This was the most valuable experience in self education of distributed infrastructure engineering, team education of all aspects in web development, tech leadership - to the day of writing.
• Started from basic idea of automating cryptocurrency trading with programmable robots, in early stage realized all complex and demanding aspects of integration with multiple crypto exchanges then pivoting to more abstract idea as cloud infrastructure - providing APIs that simplify's this integrations.
• With very limited financial resources and lack of experience of startup funding, attracted few people with zero or little experience in web development and programming on itself.
• Under my mentorship, in very short time, they grow up to middle full-stack developers doing all necessary tasks of frontend/backend, while i jumped in more complex and interesting infrastructure engineering challenges for myself.
• Personal achievements:
• Setup multi-tenant, multi-region, high availability, self healing, auto scaling cluster, designed to transfer data between exchanges and byteflows clients in a highly reliable way without introducing any significant additional latency.
• On top of moleculerJS utilizing µWebSockets, engineered & developed pub/sub system with "channels" allowing limitless subscribers (auto scaling/distributing using consistent hashing), persisted data, stream continuity over unreliable connections, message ordering, 100% delivery, successfully solved idempotency. With TypeScript developed client-side library allowing seamless connection state recovery & data re-delivery.
• Decomposition of main thread (nodejs).
• Setup Rancher, Prometheus, Grafana, Graylog.
• Setup CI/CD with GitLab runner, pipelines.
• Setup Cassandra cluster.
• Built complex data aggregations and storage solutions.
• Finally without CEO and people around with strong vision sharing, burned out.
• One of previously attracted team member successfully took full-stack developer position in high-tech company.

Apr 2015 – Nov 2019 · 4 yrs 7 mos · Riga, Latvia

• Took active part in frontend, but mostly backend development, architecture planning & maintaining of multiple, big data, projects. Some of them, AI based, where two teams (PHP, C++) collaborate. Microservice containerization, CI/CD implementation using GitLab runner & pipelines for multiple environments (dev, staging, production), roll-out to kubernetes cluster.
• Mentoring, consulting, performing code reviews.
• Agile methodology with kanban based practices used to define and work on tasks.
• Technological stack.
• IaaS: AWS
• PaaS: Kubernetes
• KaaS: Rancher
• Languages: PHP, Javascript
• Backend frameworks: Laravel, Symfony2, PHPUnit, ReactPHP, amphp
• Frontend frameworks: VueJS + Vuex, ReactJS, Backbone.js
• Message queues: RabbitMQ
• Storage: MySQL, S3, NFS, Redis, Memcached
• CI/CD: GitLab runner & pipelines
• Integrations: LDAP, Slack, XML/Excel/CSV export-import

Jun 2014 – Mar 2015 · 9 mos · Riga, Latvia

• Developing software for IoT (smart home & garden) startup.
• IoT components includes RaspberyPi, arduino and various sensors (air temperature/humidity, soil moisture, hydroponics PH & EC meters), relays/switches.
• Wireless communication over wifi, radio rfc & Bluetooth.
• Fork'ed Node-RED and developed custom nodes, wiring flows and UI.
• Technological stack.
• Environment: Linux (rpi), Arduino
• Application: Nginx, NodeJS, Node-RED, C/C++, Python
• Persistence: MySQL

Feb 2012 – May 2014 · 2 yrs 3 mos · Riga, Latvia

• Took active development of new components and maintaining, www.1188.lv portal (largest information services provider in Latvia). High load and big data related development.
• Technological stack.
• Environment: Linux
• Application: Nginx, Memcache, PHP, Javascript
• Persistence: PostgreSQL, Clusterpoint

Nov 2011 – Jan 2012 · 2 mos · Riga, Latvia

• Multiple projects started from scratch, most of them have integrations with Facebook, Twitter and draugiem.lv . Mostly projects was short living, digital advertising related.
• Technological stack.
• Environment: Linux
• Application: Apache, PHP (CodeIgniter, Kohana), Javascript (JQuery)
• Persistence: MySQL
• Integrations: Facebook API, Twitter API, Draugiem.lv API

Aug 2011 – Nov 2011 · 3 mos · Latvia, Riga

• Took active part in refactoring of legacy codebase of traffic distribution and lead generation system.
• Technological stack.
• Environment: Linux
• Application: Nginx, Memcache, PHP, Javascript
• Persistence: PostgreSQL

Oct 2010 – Jul 2011 · 9 mos · Riga, Latvia

• Developing and maintaining a collective buying portal, as well as starting new projects from scratch. Integrated payment processing gateway.
• Technological stack.
• Environment: Linux
• Application: Nginx, Memcache, PHP (CMS based on CodeIgniter), Javascript (JQuery)
• Persistence: MySQL
• Integrations: FirstData

Jul 2010 – Sep 2010 · 2 mos · Riga

• Two applications were developed and integrated with draugiem.lv social media platform.
• Technological stack.
• Environment: Linux
• Application: Apache, PHP (Codeigniter), Javascript (JQuery)
• Persistence: MySQL
• Integrations: draugiem.lv API