Gurgen is available for hire
Hire GurgenGurgen Nersesyan
Verified Expert in Engineering
Architecture Developer
Location
Yerevan, Armenia
Toptal Member Since
November 5, 2019
With over 20 years of experience in software development, Gurgen is currently helping businesses to fulfill their ideas by providing full-stack development services. Despite working primarily in ERP systems, he's also had the chance to lead projects related to high-performance services, code decompilation, reverse engineering, desktop apps, and code generators. Gurgen is passionate about solving non-standard challenges.
Portfolio
Freelance
React Native, React, Amazon Web Services (AWS), Node.js, TypeScript, DevOps...
Breed Science Inc
Node.js, APIs, Jira, Git, Test-driven Development (TDD), NoSQL...
Codulate
MongoDB, Docker, PostGIS, PostgreSQL, Spring 5, Angular, Kotlin...
Experience
Availability
Full-time
Preferred Environment
IntelliJ IDEA, Git, Zsh, MacOS
The most amazing...
...thing I've created is an on-the-spot lottery running on electronic cash register machines around the country. Working mostly offline and background synced.
Work Experience
Software Architect | Engineer
2019 - PRESENT
Freelance
- Developed the user interface and integrations for an application for Android payment terminal (POS) models Aisino A90 and Sunmi P2.
- Developed mobile app for couriers of https://buy.am, an online shopping platform, including the API.
- Introduced build and release pipeline for https://buy.am and migrated services to run on Docker containers.
- Provided software architecture services for http://oskelly.ru, an online store.
Technologies: React Native, React, Amazon Web Services (AWS), Node.js, TypeScript, DevOps, CI/CD Pipelines, iOS, Android, Linux, Architecture, Learning, Redux, Domain-driven Design (DDD), Object-oriented Design (OOD), Java, Clean Architecture, Serverless, GitHub, Back-end, Zoho, Startups, REST APIs, JSON, Web Development, Mobile, Full-stack, Software Design, Mobile Development, Mobile Applications, Test-driven Development (TDD), Algorithms, Firebase, Google Cloud Platform (GCP), User Experience (UX), WebSockets
Full-stack Developer
2021 - 2024
Breed Science Inc
- Developed a minimalistic vet portal (breadscience.vet) for managing pets' profiles, updating their health vitals, and tracking the progress of referrals.
- Created a customer app to track and update pets' weight loss program and receive feeding instructions.
- Designed an admin console for managing clients, including pet diets, subscriptions, schedules, and system jobs.
- Built a back-end API for all projects, featuring various calorie calculators, subscription management, and background jobs for database synchronization with marketing tools.
Technologies: Node.js, APIs, Jira, Git, Test-driven Development (TDD), NoSQL, Amazon S3 (AWS S3), AWS Lambda, Microservices, TypeScript, JavaScript, Amazon Web Services (AWS), NestJS, MongoDB, Chart.js, Recharts, React, Create React App, Shopify API, Klaviyo, GraphQL
Software Architect | Engineering Manager
2020 - 2022
Codulate
- Identified key bottlenecks of software and, after architectural changes, reached performance increase by 200 to 5,000 times on various metrics.
- Simplified the development environment and local set up to enable productive coding.
- Improved DevOps procedures and implemented build automation.
Technologies: MongoDB, Docker, PostGIS, PostgreSQL, Spring 5, Angular, Kotlin, Amazon Web Services (AWS), Spring Boot, DevOps, CI/CD Pipelines, Linux, Architecture, Learning, Object-oriented Design (OOD), Jenkins, Clean Architecture, GitHub, Back-end, Leadership, Requirements Analysis, REST APIs, JSON, Web Development, Full-stack, Software Design, Test-driven Development (TDD), Algorithms, User Experience (UX), WebSockets
Co-founder | CTO
2019 - 2022
Kololak.com
- Architected and designed the company's platform to convey targeting scalability while keeping maintenance costs low.
- Configured, built, and released pipelines using GitLab.
- Used AWS S3 as a NoSQL database along with video file storing for the sake of cost-saving.
- Launched the MVP within a month, including three React apps and the API.
Technologies: Amazon Web Services (AWS), Node.js, JavaScript, CTO, Cloudflare, React, NestJS, TypeScript, DevOps, CI/CD Pipelines, Linux, Architecture, Learning, Redux, Domain-driven Design (DDD), Object-oriented Design (OOD), GitLab CI/CD, Create React App, Back-end, Leadership, Requirements Analysis, Startups, REST APIs, JSON, Web Development, Full-stack, Software Design, Test-driven Development (TDD), Algorithms, User Experience (UX)
CTO | R&D Head
2008 - 2019
IUNETWORKS LLC
- Kickstarted over ten products by designing initial architecture and launching MVP, including an IPTV solution with Arris (previously Motorola) STBs and a tax liabilities calculation engine with an ongoing data migration engine.
- Reverse-engineered and improved the performance of an eProcurement platform where the source codes were missing.
- Designed and led the development of document and workflow management tools in an electronic tax filing system in Armenia.
- Created a risk evaluation (tax data cross-checking) engine for the state revenues committee in Armenia.
Technologies: Node.js, Couchbase, JavaScript, SQL, CTO, JSF, MySQL, PostgreSQL, Oracle, PL/SQL, AngularJS, Angular, Spring, Jakarta EE, Java, Spring Boot, CI/CD Pipelines, Windows, Linux, Architecture, Learning, SQL Server Reporting Services (SSRS), Digital Signatures, Object-oriented Design (OOD), Object-oriented Programming (OOP), Pentaho, Jenkins, Hibernate, Clean Architecture, Back-end, Leadership, Requirements Analysis, REST APIs, JSON, Web Development, Full-stack, Software Design, Test-driven Development (TDD), Algorithms
CIO | Head of IT
2016 - 2017
Orange, Armenia/UCom
- Led the technical transformation of company mergers.
- Troubleshot incidents and improved tooling for prevention.
- Developed integration services and tools for convergent products.
Technologies: Spring, SQL, CTO, PHP, Java, PL/SQL, Oracle, Telecommunications, Learning, Back-end, Leadership, Requirements Analysis
Senior Developer
2007 - 2008
Macadamian
- Developed a supporting module for a Boston-based company running online ad services.
- Delivered sprints and was recognized afterward as a top performer.
- Curated the local group of developers in Armenia.
Technologies: Ruby, JavaScript, SQL, Ruby on Rails (RoR), Learning, Object-oriented Programming (OOP), Back-end, JSON, Web Development, Full-stack
Senior Developer
2006 - 2007
Lycos Europe
- Supported the online dating platform love@lycos with around 80,000 active users.
- Developed the project using the formerly popular web framework WeBWorK, Java 6, and iBATIS.
- Used CruiseControl for continuous integration and an Ant tool for managing the build cycle.
Technologies: JavaScript, Spring, SQL, CruiseControl, WeBWorK, Java, Learning, Object-oriented Programming (OOP), CVS, Back-end, JSON, Web Development, Full-stack
Developer
2002 - 2006
Synergy International Systems
- Supported the JSF tag library, which is used across different projects internally.
- Worked on the CMS admin tool, a desktop app written with Swing.
- Developed Java2 Swing components for a desktop application.
Technologies: Spring, SQL, Microsoft SQL Server, MySQL, JavaScript, JSF, Java, Learning, Web Development, Full-stack
Junior Researcher
2001 - 2002
Institute for Informatics and Automation Problems, National Academy of Science, RA
- Contributed to research related to fuzzy data classification algorithm modeling and problems from the field of supervised learning.
- Studied the theory of constructing a machine learning model.
- Worked on the implementation of the algorithm in Java.
Technologies: Mathematics, Java, Learning
Experience
Kololak.com
The kololak.com platform offers an online service that provides people to hire celebrities to create personalized videos. Inspired by cameo.com and targeting a specific market. Developed and launched within two months during global lockdowns caused by COVID-19.
Simple IT Department Stock Management App (Ongoing)
https://gitlab.com/zukalt/it-stockThis is a personal open-source project. The app is intended for small company IT departments to track inventory. It lets users define asset types and owners (employees who receive and return assets), record inventory movements, and get ownership reports.
Technologies used include Node.js, React, React-Redux, Material-UI, and PWA working within a MERN-like tech stack. PostgreSQL will be used for storing.
.
With this project, I am looking to demonstrate my coding and architectural design skills.
Technologies used include Node.js, React, React-Redux, Material-UI, and PWA working within a MERN-like tech stack. PostgreSQL will be used for storing.
.
With this project, I am looking to demonstrate my coding and architectural design skills.
Billing and CRM Platform
https://iunetworks.am/en/products/bcrmDuring my early years of development, I contributed to designing the main concepts and implementing core modules of a platform to manage the entire lifecycle of telecommunication customers. The core modules included charging, service activation workflow management, and service provisioning.
T5 - IPTV for Local Operator
https://iunetworks.am/en/products/t5-iptv-ottI created the first MVP, which included the initial interface for middleware services, serving EPG and user authentication. Years later, I participated in the performance optimization process and the development of new features.
e-Tax Administration
https://iunetworks.am/en/products/productA multi-modular system that automates various processes of tax administration. I participated in the development of core architecture and development of separate modules, including:
• tax liabilities calculation
• document management
• integration with other governmental entities
• risks assessment by data cross-checking
• cash register machines data collection
• tax liabilities calculation
• document management
• integration with other governmental entities
• risks assessment by data cross-checking
• cash register machines data collection
eProcurement, Planning and Contracts Management
https://iunetworks.am/en/products/e-procurement2I was primarily involved in recovering the source code of the legacy software and enhancing its performance. Additionally, I set up the custom build deployment (CI/CD) pipeline and contributed to the development of the planning and contract management extension.
Skills
Languages
Kotlin, Java, JavaScript, SQL, TypeScript, GraphQL, PHP, Ruby, Groovy
Frameworks
Next.js, NestJS, Spring, Spring Boot, React Native, Angular, Swagger, Redux, Hibernate, Ruby on Rails (RoR), Spring 5, AngularJS, JSF
Libraries/APIs
Node.js, React, REST APIs, RxJS, Chart.js, Recharts, Shopify API
Paradigms
Clean Architecture, Requirements Analysis, Test-driven Development (TDD), Object-oriented Design (OOD), Object-oriented Programming (OOP), DevOps, Mobile Development, Microservices
Storage
JSON, MongoDB, Oracle PL/SQL, PostgreSQL, MySQL, PL/SQL, Microsoft SQL Server, PostGIS, SQL Server Reporting Services (SSRS), Couchbase, NoSQL, Amazon S3 (AWS S3)
Other
Architecture, CTO, CI/CD Pipelines, Back-end, Leadership, Web Development, Full-stack, Software Design, Algorithms, WebSockets, Cloudflare, Learning, Domain-driven Design (DDD), Digital Signatures, Bitbucket Pipelines, Serverless, Startups, Mobile Applications, User Experience (UX), WeBWorK, CruiseControl, Mathematics, Applied Mathematics, SVG, Zoho, APIs
Tools
Create React App, Git, Jenkins, GitLab CI/CD, GitHub, Zsh, IntelliJ IDEA, Terraform, Shell, CVS, Subversion (SVN), Travis CI, Jira
Platforms
Linux, Amazon Web Services (AWS), Docker, Mobile, Firebase, MacOS, Jakarta EE, Oracle, Pentaho, Windows, Google App Engine, iOS, Android, Google Cloud Platform (GCP), AWS Lambda, Klaviyo
Industry Expertise
Telecommunications
Education
2002 - 2004
Master's Degree in Applied Math
State Engineering University of Armenia - Yerevan, Armenia
1998 - 2002
Bachelor's Degree in Applied Math
State Engineering University of Armenia - Yerevan, Armenia
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