Iaroslav
From Ukraine (GMT+1)
13 years of commercial experience
Lemon.io stats
2
projects done1546
hours workedOpen
to new offersIaroslav – 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
Additional skills
Ready to start
ASAPDirect hire
Potentially possibleExperience Highlights
Tech Lead
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).
- Designed back-end architecture
- Built the whole back-end
- Managed the frontend team
Tech Lead
A trusted online marketplace where fans can buy official hospitality packages and VIP tickets to live sports, music and cultural events.
- 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.
Architect, Full-Stack Developer
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.
- Designed the product architecture from the ground up.
- Built the product as a full-stack developer.
- Deployed to AWS & Vercel infrastructure.
- Implemented all features.
Full-Stack Developer
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.
Launched the product in 14 days from idea to production. It was improved over time.
Senior Software Engineer
Best Real Estate CRM by Agents, for Agents.
- 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.
Senior Technical Product Owner
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.
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.
Software Engineer
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.
- 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.
Software Engineer
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.
- 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
Software Engineer.
An eCommerce platform (online shop) that sells products online. Features: Filters, Search, Checkout.
- 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