Position: Tech Lead / Staff Engineer /  Senior Software Engineer / Ruby Engineer / Python Engineer
Category: Ruby
English level: fluent
Years of experience: 10

I have a proven track record of solving complex engineering and team process-building challenges, which include but does not limit to:
- developed and maintained numerous applications and backend APIs with real-time capabilities and two-way synchronization using Rails, Python, JavaScript and WebSockets.

- developed in-house solutions which transitioned the company from using commercial external software to a more rich and customized in-house solution for geospatial tasks. Our solution was able to work with geospatial data with all capabilities present in google maps API (A to B routes, complex routes, time estimation, traffic prediction etc.), solved travel salesman problem (aka TSP problem), was fully customizable (managers could add custom addresses and points of interests on a map and many more)

- implemented and scaled DevOps and SRE processes (starting alone and managing a team of DevOps later) Terraform, Kubernetes, Docker, ArgoCD, Chef, and Packer

more information is available in a CV per request.
Technology stack I've mostly worked with:
- Ruby, Ruby on Rails, Python, JavaScript, React
- PostgreSQL, Elasticsearch, Redis, MongoDB
- Kafka
- Kubernetes, Docker, Terraform, Chef, Packer
- AWS, EC2, RDS, S3, ElasticSearch and many more

Notable projects I worked at:
Tech Lead at Rocket Delivery | Ukrainian food-tech startup (similar to DoorDash, UberEats etc.) ~ 5 years

- led the development (as a leader and as a contributing engineer) from day 1 and MVP stage to the transition to a large-scale project working in 7 countries having 150+ engineers and capable of handling high-load
- shaped the technical vision and architecture to be competitive with other multi-billion food-tech companies
- integrated and mentored various R&D projects (M&L, prediction systems, logistics algorithms, etc.)
- led several teams as a manager and as a contributing software engineer

Lead Software Engineer - Pokupon ~3 years
- Full-stack development using Ruby on Rails (3, 4, 5) and JavaScript
- Implementing and maintaining blue-green automated deployment system (Chef, Packer, AWS, Ruby, Jenkins)
- Orchestrating cloud infrastructure (Chef, security updates, automated jobs)
- Writing maintenance scripts in Ruby
- Working with AWS (rds, ec2, elasticsearch, elasticcache, balancing and autoscaling)
- Consolidating logs and messages via ELK stack
- Integrating with 3rd party APIs
- Covering apps with tests to ensure quality and stability
- Mentoring and code-reviewing software engineers

more projects I worked at are described in a CV
Ideally, I would like to work in a product company (including startups), but it is not a deal breaker.