Abdulla Achilov
Verified Expert in Engineering
Ruby Developer
Warsaw, Poland
Toptal member since September 11, 2020
Abdulla is a seasoned Ruby on Rails leader with 12+ years of expertise in back-end solutions, API integrations, and technical leadership. Proficient in CI/CD and DevOps, he designs scalable architectures and implements automation for efficient workflows. Abdulla strongly advocates test-driven development, ensuring high-quality and maintainable code. Known for his independent innovation and collaborative spirit, he consistently seeks improvements in projects and processes.
Portfolio
Experience
- Back-end - 12 years
- PostgreSQL - 12 years
- Ruby on Rails (RoR) - 12 years
- APIs - 9 years
- Sidekiq - 9 years
- GraphQL - 7 years
- Amazon Web Services (AWS) - 7 years
- CI/CD Pipelines - 5 years
Preferred Environment
Amazon Web Services (AWS), Heroku, Ubuntu, RubyMine, MacOS, Selenium, JetBrains IDE, Kubernetes, AI Agents, SharePoint
The most amazing...
...thing I've developed was Shaker: Shake Messenger, a social network for individuals who could shake their phones to socialize and earn rewards.
Work Experience
Back-end Tech Lead
ZenLeads Inc.
- Led key feature development strategically, boosting product capabilities and driving a 60% increase in customer adoption, directly contributing to sales growth.
- Pioneered database optimization, enhancing system performance and achieving a 12% reduction in operational costs by refining query efficiency and resource utilization.
- Provided expertise in monitoring based on NewRelic metrics, did an investigation, and followed refactor, slashing user interaction times by 40 seconds and freeing up over 17 hours of customer time daily.
- Crafted a comprehensive engineering roadmap, streamlining project planning and execution, reducing cycle times from concept to engineering to just two weeks.
- Led weekly team meetings leveraging MVP principles to prioritize deliverables, ensuring timely product iterations and maximizing customer feedback opportunities.
- Made hands-on technical contributions, delivering code that significantly impacted project momentum and shortened development cycles by a couple of days.
- Specialized in optimizing high-load components of the application to ensure efficient performance. Reviewed all aspects of database queries, including indexes, query effectiveness, and performance enhancements.
Senior Software Engineer
WeSpire
- Transformed the CI pipeline, achieving a groundbreaking 600% faster test suite execution by pioneering effective parallelization strategies and implementing Cypress on currents for enhanced test transparency and speed.
- Overhauled payment services, orchestrating a strategic transition to a more robust architecture that boosted error tracking and expanded test coverage, ensuring seamless payment processing. Reduced average error detection time by 1.7 days.
- Optimized onboarding strategy while mentoring junior developers through pairing sessions and code reviews, reducing onboarding time from three to two weeks.
- Reworked review apps completely, reducing setup time for development and testing phases from 30+ minutes to just 9 minutes. This enabled the inclusion of a QA engineer in each pull request with a specific label.
Senior Back-end Developer
Closedwon
- Refactored legacy code of a standalone app to a REST API app.
- Worked with background services (Sidekiq) for processing huge amounts of data.
- Used parsers to gather information from public resources.
- Participated as a team lead in matters of integrating the REST API with the React app.
- Deployed and set the entire app to AWS in an SOA architecture.
Senior Full-stack Developer
Key24ee
- Worked with legacy code and implemented unit testings and integration scenarios.
- Organized bug and feature desks inside GitLab and set continuous integration.
- Developed real estate two-sided parsers for both get/set real estate ads from/in XML/XLS.
- Participated in the launch process, and prepared ready-to-use helpers on the back end for a Facebook advertisement.
Middle Back-end Developer
ITC Project
- Developed a back-end for the web version of a social network, including secure end-to-end encrypted messages.
- Contributed as a team member, valuing ideas and participating in weekly scrum meetings.
- Participated in the launch process and was involved in marketing decision-making.
- Created an API for external calls for Android and iOS applications.
Experience
Tech Leadership for Sales Intelligence Platform
https://www.apollo.io/My focus was on optimizing database queries for peak efficiency amidst large data volumes. Through detailed assessments, I refined query performance, targeting O+1 issues elimination and implementing advanced optimization strategies. This resulted in markedly faster query executions and boosted system efficiency.
Collaborating with the development team, I offered expertise in database design and query optimization, identifying and implementing improvements to sustain heavy load handling. My efforts were crucial in resolving database bottlenecks, significantly contributing to the platform's role in augmenting our clients' revenue growth.
Senior Software Engineer at Wespire
https://www.wespire.com/Closedwon
Education
Specialist (5-year) Degree in Engineering
Moscow Technical University of Communications and Informatics - Russia
Skills
Libraries/APIs
jQuery, WhatsApp API, Gmail API, Sidekiq, Ruby on Rails API, REST APIs, Resque, React, Stripe, Stripe API, Pandas, Claude API, LinkedIn API, Social APIs, Node.js
Tools
Git, GitHub, ChatGPT, Microsoft Graph, NGINX, Postman, RSpec, CircleCI, Capistrano, Sentry, Hotwire, AWS SDK, Claude, Claude Agent SDK, Claude Code, SendGrid, SMART on FHIR
Languages
Ruby, JavaScript, PHP, GraphQL, Haml, Unicorn, Python, SQL, CoffeeScript, HTML, HTML5, Bash, Bash Script, CSS3, Sass, CSS, TypeScript, C++, Rust, Go, C#, Java
Frameworks
Ruby on Rails (RoR), Ruby on Rails 4, Ruby on Rails 5, Laravel, Ruby on Rails 3, OAuth 2, Cypress, Django, Selenium, Angular, Next.js, Tailwind CSS, React Native
Paradigms
Test-driven Development (TDD), Unit Testing, Object-relational Mapping (ORM), Testing, DevOps, Continuous Integration (CI), Continuous Delivery (CD), Microservices, API Architecture, Clean Code, Behavior-driven Development (BDD)
Platforms
Heroku, Ubuntu, Amazon Web Services (AWS), Docker, Twilio, New Relic, Kubernetes, Shopify, Google Cloud Platform (GCP), SharePoint
Storage
PostgreSQL, Redis, Databases, MySQL, MongoDB, Elasticsearch, Relational Databases, NoSQL, Cloud Deployment, Redis Cache, Google Cloud, DB
Other
Back-end, APIs, Back-end Development, Query Optimization, Performance Optimization, API Integration, Application Security, Software Architecture, IT Security, Telegram Bots, API Design, Artificial Intelligence (AI), Cloud Infrastructure, API Testing, Webhooks, Web Development, CRM APIs, CRM, Microsoft Graph API, Outlook, SaaS, Parsers, Puma, Startups, OAuth, CI/CD Pipelines, SDKs, Localization, Background Jobs, Async/Await, JetBrains IDE, WebSockets, Deployment, Partitioning, Sharding, Algorithms, Payment APIs, Payment Gateways, Upgrades, Stripe Payments, FastAPI, Cloudflare, Full-stack Development, Front-end, Bots, Containers, Architecture, Amazon RDS, Content Management Systems (CMS), API Connectors, AI Agents, AI Agent Orchestration, AI Automation, Gemini, Gemini API, LangChain, Railway, Real Estate, eCommerce, POI, Natural Language Processing (NLP), Full-stack, HTML5 Animations, Delivery, Large Language Models (LLMs), AI Architecture
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