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Iaroslav – Ruby on Rails, Ruby, AWS, experts in Lemon.io

Iaroslav

From Ukraine (GMT+1)

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Back-end Web DeveloperSenior
Architect
Tech Consultant
Hire developer
13 years of commercial experience
AI
E-commerce
E-learning
Edtech
Entertainment
Event management
Fintech
Healthcare
Hospitality
IoT
Productivity
Real estate
Retail
Social media
Telecommunications
Marketplace
AI software
Chatbots
CRM
Customer support software
SaaS
Lemon.io stats
2
projects done
1546
hours worked
Open
to new offers

Iaroslav – Ruby on Rails, Ruby, AWS

Iaroslav is a Senior Back-End Developer with extensive experience in the common Rails stack. He is well-versed in best practices and common patterns for Rails projects, and has experience with microservices and asynchronous processing using Kafka. Iaroslav has worked both independently and as part of a team, taking on roles such as solo software engineer and product owner. Known for his calm and polite demeanor, he enjoys the startup environment and fast-paced development.

Main technologies
Ruby on Rails
12 years
Ruby
12 years
AWS
7 years
Additional skills
C++
Unity
HTML
React
SQL
Docker
Android
WebRTC
Elixir
Next.js
Redis
PostgreSQL
CSS
iOS
Memcache
Sidekiq
Kubernetes
OAuth
Ready to start
ASAP
Direct hire
Potentially possible

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Experience Highlights

Tech Lead
Oct 2023 - Ongoing1 year 2 months
Project Overview

An AI-based app for recording audio notes and summarizing your thoughts on the fly. It's the perfect tool for capturing ideas.

Iaroslav build backend and 2 mobile applications (iOS & Android).

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Responsibilities:
  • Designed back-end architecture
  • Built the whole back-end
  • Managed the frontend team
Project Tech stack:
Ruby on Rails
Ruby
AWS
Tech Lead
Apr 2022 - Ongoing2 years 8 months
Project Overview

A trusted online marketplace where fans can buy official hospitality packages and VIP tickets to live sports, music and cultural events.

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Responsibilities:
  • Providing technical leadership and setting the direction and standards for the team.
  • Planning and prioritizing project work to ensure timely delivery.
  • Managing and mentoring team members to ensure their success.
  • Collaborating with stakeholders to align on project goals and requirements.
  • Conducting code reviews and ensuring code quality.
  • Ensuring high-quality software that meets customer needs.
  • Identifying and mitigating project risks and following security best practices.
  • Staying up-to-date with the latest technology trends.

Achievements

  • Successfully implementing SCRUM processes within the team, resulting in more efficient and effective workflows.
  • Leading the development and delivery of major features such as localization, multi-currency support, and dynamic pricing, which significantly improved the product's functionality and increased customer satisfaction.
Project Tech stack:
Ruby on Rails
AWS
Elixir
Architect, Full-Stack Developer
Aug 2023 - Jul 202411 months
Project Overview

The platform offers an incredibly simple way for anyone to create stunning documents, help centers, and knowledge bases. With a focus on user-friendly design and efficient support.

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Responsibilities:
  • Designed the product architecture from the ground up.
  • Built the product as a full-stack developer.
  • Deployed to AWS & Vercel infrastructure.
  • Implemented all features.
Project Tech stack:
Next.js
Ruby on Rails
Ruby
AWS
React
Full-Stack Developer
Dec 2022 - Dec 20231 year
Project Overview

Increase your chance of getting a TOP IELTS SCORE with AI Boost your IELTS preparation with our AI mock exams. Experience real-time grading and tailored feedback for Writing and Speaking Mock Tests.

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Responsibilities:

Launched the product in 14 days from idea to production. It was improved over time.

Project Tech stack:
Next.js
Ruby on Rails
AWS
Senior Software Engineer
Jan 2022 - Nov 20229 months
Project Overview

Best Real Estate CRM by Agents, for Agents.

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Responsibilities:
  • Designed and developed scalable and efficient backend systems that can handle large amounts of data and high traffic.
  • Collaborated with cross-functional teams to understand requirements and design appropriate solutions.
  • Created and maintained RESTful APIs that can be easily consumed by frontend applications.
  • Developed and maintained databases that can handle complex data structures and queries.
  • Implemented security best practices to ensure that sensitive data is protected.
  • Monitored and optimized backend performance to ensure that the system could handle high traffic and large amounts of data.
Project Tech stack:
Ruby on Rails
Senior Technical Product Owner
Jul 2019 - Mar 20222 years 8 months
Project Overview

German telemedicine solution provider which works with German government health organizations on one side and has its own SaaS product for doctor’s practices/clinics on the other.

Features: Peer-to-peer and end-to-end encrypted video calls, CRM for clinic management, calendar, and appointment system.

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Responsibilities:

Responsibilities:

  • Day-to-day work on refiling and prioritization of product backlog items;
  • Removed bottlenecks for the engineering team;
  • Wrote user stories and technical documentation;
  • Drove team planning meetings and engineering excellence to ensure the team is delivering high-quality results on time;
  • Planned, implemented and maintained roadmap, strategy, and scheduling;
  • Made sure that company goals, roadmap, and strategy are feasible and understandable for the team.

Achievements:

  • With the team won a tender for “https://www.docdirekt.de” - the Baden-Württemberg Association of Statutory Health Insurance Physicians (KVBW) in Germany. Delivered the docdirekt project for iOS, Android, Web in super tight terms (2,5 months) from scratch to production;
  • Hired and managed a team of ten engineers;
  • Implemented agile methodologies (SCRUM/Kanban) and built all team processes from scratch.
Project Tech stack:
Android
WebRTC
Docker
Kubernetes
Postgres
Redis
AWS
iOS
React
Ruby on Rails
Software Engineer
Jul 2017 - May 20191 year 10 months
Project Overview

A financial trust marketplace for small businesses. As a small business owner, you share decisions, contracts, and payments with your customers and suppliers via mobile in order to remove uncertainty and complexity.

Features: 1-on-1 and group chat, contracts with milestones, marketplace.

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Responsibilities:
  • Split the original monolithic application into multiple components in order to achieve a microservice architecture
  • Helped build the chat-based marketplace platform from the ground up using Ruby on Rails
  • Worked with the Engineering Excellence team to integrate Jenkins into our development process for CI/CD
  • Led software architecture and infrastructure design decisions, such as migrating to a new chat platform.
Project Tech stack:
Docker
Kubernetes
PostgreSQL
AWS
iOS
Ruby on Rails
Software Engineer
Jan 2016 - Jan 20182 years
Project Overview

A SaaS platform that helps Amazon sellers to grow their brands on Amazon using various sets of tools.

Features: Email Autoresponder, Keywords/Products/Reviews Tracker, Analytic Dashboard.

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Responsibilities:
  • Designed and developed core features (RESTful API)
  • Developed an analytic tool that worked with Amazon API which allowed thousands of sellers to monitor daily information about millions of products sold
  • Built and Maintained an AWS environment (RDS/Route52/EC2/ElasticCache) using docker and Kubernetes
  • Collected data by scraping Amazon website using PhantomJS, Capybara
  • Contributed to the development of roadmap sessions
Project Tech stack:
AWS
Postgres
Redis
Memcache
React
Ruby on Rails
Software Engineer.
Jun 2014 - Dec 20151 year 6 months
Project Overview

An eCommerce platform (online shop) that sells products online. Features: Filters, Search, Checkout.

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Responsibilities:
  • Documented development and architectural decisions of approaches taken along with all integration steps
  • Built a robust RESTful API for interaction between our service and a third-party vendors warehouse
  • Worked on bug fixing and code-quality third-party integrations for the CI/CD process
  • Led a small team of four backend engineers
Project Tech stack:
AWS
Postgres
Redis
Sidekiq
React
Ruby on Rails

Education

2011
Computer Systems and Networks
Bachelor's

Languages

English
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