Publication
An Angular 5 Tutorial: Step by Step Guide to Your First Angular 5 App
https://www.toptal.com/angular/angular-5-tutorial
Sergey is available for hire
Hire SergeySergey Moiseev
Verified Expert in Engineering
Full-stack Developer
Location
Tallinn, Estonia
Toptal Member Since
May 9, 2014
Sergey is a proficient full-stack software engineer who has worked on intricate web projects. He possesses strong analytical abilities and excels in gathering project requirements. Sergey's experience ranges from being a full-stack developer to a team lead/CTO.
Portfolio
Giftly Inc
SQL, Ruby on Rails (RoR), JSON, APIs, eCommerce, Legacy Code, Third-party APIs...
Scionian
JavaScript, HTML, CSS, Angular, Redux, Expo, Firebase, Ionic 3
International Technological University
Ruby on Rails (RoR), Angular, NgRx, Turbo, Stimulus, Elixir, Phoenix...
Experience
Availability
Full-time
Preferred Environment
Angular, Ruby on Rails (RoR), Ruby, Turbo
The most amazing...
...things I've accomplished is performing migrations for diverse projects to newer frameworks and architectures, resulting in a quicker response to business needs.
Work Experience
Back-end Developer
2022 - 2023
Giftly Inc
- Developed the back end for the new corporate portal. Implementation wraps the legacy layer codebase and extends it for the needs of new business processes without changing how the same legacy layer provides services to different consumer components.
- Implemented full test coverage for that work as well as needed missing coverage of key legacy components.
- Helped with UI/UX review process of new portal development for an online gifts platform.
Technologies: SQL, Ruby on Rails (RoR), JSON, APIs, eCommerce, Legacy Code, Third-party APIs, CSS, HTML, API Integration, Payment APIs, Sidekiq, State Machines, Stripe API, RSpec, Redis, Linux, Git, JavaScript, SQL-99, Devise, REST APIs, UML
Front-end Developer
2020 - 2023
Scionian
- Supported the development of the Ask Ari mobile application. Released multiple versions of the application to both the App Store and Google Play market.
- Supported the development of the web-based version of Ask Ari.
- Built a new version of Ask Ari on top of Angular, NgRx, and the Ionic framework in the format of an NX-based monorepo for reducing code duplication.
Technologies: JavaScript, HTML, CSS, Angular, Redux, Expo, Firebase, Ionic 3
Senior Full-stack Developer (Independent Contract)
2020 - 2023
International Technological University
- Developed and launched My.itu.edu, an Angular and NgRx-based platform for students to register and pay for courses at university.
- Implemented the back end for My.itu.edu on top of a Ruby on Rails-based SRM platform. The solution included the management of scholarship discounts, prepaid nugget course implementation, and reporting for students and account payable representatives.
- Implemented the migration process for legacy data to provide continued operations for the teaching process.
- Migrated the old AngularJS-based SRM admissions interface to a Turbo-based interface that allowed delivering new features way faster and more efficiently.
- Migrated the My.itu.edu Angular and NgRx-based interface into a Turbo-based SRM platform, reducing code duplication and providing a full-cycle student experience from admission to graduation.
- Implemented a Turbo-based UI for Angular Material web components using Stimulus with support for complex UI elements like autocomplete and chipset with limited and Typeahead server-based lists.
- Implemented Elixir/Phoenix Live View-based internal chat platform for ITU students and staff.
Technologies: Ruby on Rails (RoR), Angular, NgRx, Turbo, Stimulus, Elixir, Phoenix, Phoenix LiveView
Full-stack Developer
2018 - 2022
Ygrene Energy Fund
- Aided in creating a new prequalification and application process with Angular 6 and NgRx.
- Helped create a monorepo layout for Angular apps, using Nx, NgRx, shared modules, and environment to deliver new front-end projects quickly and efficiently.
- Created a supporting proxy-like module for a new application process back end to provide new workflows in an existing feature-flag-based process without additional data models using Ruby on Rails (RoR).
- Supported an automated underwriting system implementation by covering all key Ruby code, making it reliable and maintainable.
- Implemented the initial message bus encryption mechanism for securing microservice interoperation using Ruby and AWS SQS.
- Migrated multiple services from Scala to RoR, using Scala code as a source of requirements. They include external postal providers, environment management solutions like backup scrubbing and event-based S3 archival solutions, and GIS-based solutions.
- Helped maintain and improve automatic microservice client generation, using the zero-rails_openapi gem and open API generator.
- Built a new system area configuration service using a Hotwire (Turbo) Ruby on Rails 7 architecture.
Technologies: Amazon Web Services (AWS), Redux, RESTful Web Services, Angular Material, NgRx, Swagger, Docker, Scala, Kubernetes, Ruby on Rails (RoR), Ruby, Angular, SAML, Turbo, Hotwire, Material Design, TypeScript, Ruby on Rails 7, Tailwind CSS, Stimulus, CSS, HTML, API Integration, Third-party APIs, Legacy Code, Sidekiq, NGINX, State Machines, Protractor, RSpec, Redis, MySQL, Linux, Git, JavaScript, SQL-99, Devise, REST APIs, Sass, UML
Full-stack Web Developer
2017 - 2018
Caspar Health
- Created a front-end application for the main business platform utilizing Angular 5 and NgRx.
- Helped release a product that made one of five finalists at Disrupt Berlin Startup Battlefield 2017.
- Aided in refactoring and developing the Ruby on Rails application back end.
Technologies: Amazon Web Services (AWS), Ruby on Rails 5, Redux, RESTful Web Services, Angular Material, NgRx, Docker, PostgreSQL, Angular, CSS, HTML, API Integration, Third-party APIs, Sidekiq, NGINX, State Machines, RSpec, Redis, Linux, Git, JavaScript, SQL-99, Devise, REST APIs, Sass, UML
Full-stack Web Developer
2017 - 2017
Everwill
- Set up and moved an AWS Elastic Beanstalk Multicontainer Docker configuration to production.
- Built a new version of the company's main application on Angular 4.
- Implemented a flexible workflow engine for the application.
Technologies: Redux, RESTful Web Services, NgRx, Docker, MongoDB, Ruby on Rails (RoR), Ruby, Angular, CSS, HTML, Third-party APIs, Linux, Git, JavaScript, SQL-99, Sass
Full-stack Web Developer
2014 - 2017
International Technological University
- Implemented ITU Bridge, a project to help students and alums to apply for jobs at top companies.
- Implemented ITU's single sign-on solution, the ITU ID.
- Implemented ITU Student Relationship Management, a system for automating an admissions data and document collection process. The system included Stripe and SalesForce integrations.
- Worked as a back-end Rails developer, an AngularJS front-end developer, and DevOps for all mentioned projects.
Technologies: Ruby on Rails 5, Redux, RESTful Web Services, Angular Material, MySQL, CSS3, HTML5, AngularJS, Ruby on Rails (RoR), Ruby, CSS, HTML, API Integration, Third-party APIs, Payment APIs, Sidekiq, NGINX, State Machines, AngularUI, Salesforce API, Stripe API, RSpec, Redis, Linux, Git, JavaScript, SQL-99, Devise, REST APIs, Sass, UML
CTO
2013 - 2014
Information Ideas
- Implemented a production-ready SPA job search site.
- Formed a team of two developers to work on a project.
- Built a set of AngularJS directives for competence tree rendering and selection.
- Created a competence search engine on top of Redis.
- Created a complex UI with interacting controls on top of AngularJS.
Technologies: Ruby on Rails 5, RESTful Web Services, AngularJS, Redis, PostgreSQL, Ruby on Rails (RoR), CSS, HTML, API Integration, Third-party APIs, RSpec, Linux, Git, JavaScript, SQL-99, Devise, REST APIs, Sass, UML
Development Team Lead
2012 - 2013
HeadHunter Group
- Implemented an online competence-based candidate search project in a small team of three developers.
- Provided a full cycle of requirements analysis for the project.
- Implemented property search on top of a Redis set intersection.
- Built a RIA interface for a project using Backbone.js.
- Created an automated competence pre-fill solution using candidate resumes as the data source.
Technologies: RESTful Web Services, Backbone.js, Redis, PostgreSQL, Ruby on Rails (RoR), CSS, HTML, API Integration, Third-party APIs, Sidekiq, State Machines, RSpec, Linux, Git, JavaScript, SQL-99, Devise, REST APIs, Sass, UML
CTO
2011 - 2012
KupiKupon Global
- Supported a high-load production environment for a daily deal site on top of Drupal.
- Managed and implemented a new version of a site using Ruby on Rails.
- Migrated all data to a new project and replaced the old project with the new one.
- Formed a development team of ten developers by putting together position requirements, interviewing, and training.
- Implemented a VoIP call center solution based on Asterisk PBX.
Technologies: RESTful Web Services, PostgreSQL, Ruby on Rails (RoR), CSS, HTML, API Integration, Third-party APIs, Legacy Code, Payment APIs, Sidekiq, NGINX, State Machines, RSpec, Redis, Linux, Git, JavaScript, SQL-99, Devise, REST APIs, Sass, UML
CTO
2008 - 2011
Digital Distribution Center
- Formed a team and started an internal software development process in the company.
- Moved an outsourced project with the support of a formed team and completed its development from early prototype to production-ready version.
- Managed a complete rewrite of the project from PHP to Ruby on Rails.
- Created an in-house digital right management solution for the project.
- Applied Agile practices to the working process and set up a development cycle for the company.
Technologies: RESTful Web Services, VMware, Flex, Flash, PHP, PostgreSQL, Ruby on Rails (RoR), CSS, HTML, API Integration, Third-party APIs, Legacy Code, Payment APIs, Sidekiq, NGINX, State Machines, RSpec, Redis, Linux, Git, JavaScript, SQL-99, Devise, REST APIs, Sass, UML
Lead Developer | System Analyst | Head of R&D
2004 - 2008
Chronopay B.V.
- Implemented integrations with Parex (FirstData.lv), UCS (abgcard.ru), and other payment providers.
- Developed many improvements to the Chronopay PSP system. Included many new architectural improvements, integration processing, 3D secure implementation, and more.
- Applied Agile practices in the working process and set up the development cycle for the company.
- Provided analytical support for the work cycle of the R&D department. Provided a full cycle of business analysis for the company.
- Provided support for three annual PCI DSS certifications.
Technologies: Mono, PostgreSQL, PHP, CSS, HTML, API Integration, Third-party APIs, Legacy Code, Payment APIs, Linux, JavaScript, SQL-99, UML
Lead SW Developer
2000 - 2001
Ayaxi
- Developed TenderOnline.ru (currently unavailable) from base technical requirements to the product in use.
- Managed a team of three developers in the process of developing TenderOnline.ru.
- Developed modules for the Ayaxi main product Ayaxi Publisher, used in client installations.
- Provided development analysis for the early stages of the president of Russia website [www.kremlin.ru].
- Developed methods for outsourcing work support, code format requirements, and documentation format guides.
Technologies: Microsoft SQL Server, ASP, CSS, HTML, JavaScript, SQL-99
Experience
Skills
Languages
Ruby, HTML, CSS, UML, Sass, CSS3, HTML5, JavaScript, SQL-99, PHP, Scala, SAML, TypeScript, SQL, Elixir
Frameworks
Angular, Ruby on Rails (RoR), AngularJS, Angular Material, Slim, Swagger, ASP, Mono, Flex, Ruby on Rails 5, Protractor, Redux, Tailwind CSS, Stimulus, Ionic 3, Phoenix
Libraries/APIs
Devise, REST APIs, NgRx, Pundit, Stripe API, Salesforce API, Sidekiq, AngularUI, Restangular, Backbone.js
Platforms
Docker, Linux, Amazon Web Services (AWS), Kubernetes, Firebase
Storage
PostgreSQL, MySQL, Redis, Microsoft SQL Server, MongoDB, JSON
Other
State Machines, RESTful Web Services, API Integration, Payment APIs, Puma, ISO 8583, GitFlow, Hotwire, Material Design, Ruby on Rails 7, APIs, eCommerce, Legacy Code, Third-party APIs, Software Development, Phoenix LiveView
Tools
NGINX, Git, RSpec, Capistrano, Flash, VMware, Turbo, Expo
Education
1995 - 2001
Master's Degree in Computer Engineering
Moscow State Institute of Electronics and Mathematics (Technical University) - Moscow, Russia