Anna Avanesyan, Developer in Yerevan, Armenia
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Anna Avanesyan

Verified Expert  in Engineering

Node.js Developer

Yerevan, Armenia
Toptal Member Since
June 24, 2021

Anna is an experienced back-end engineer with over five years experience in top IT companies and a BBA in computer science from the American University of Armenia. She has extensive experience creating and maintaining RESTful microservice applications using Node.js and Nest.js and databases with mobile and web payment systems integration. Anna has developed applications that have served over 150 million monthly active users.


Node.js, AWS SDK, AWS Lambda, Amazon DynamoDB, EventBus, Amazon S3 (AWS S3)...
Lake Country Growers, Inc.
API Integration, APIs, Klaviyo, BigCommerce, HTML, JSON, Ruby, PHP
JavaScript, Node.js, Express.js, Microservices, RESTful Microservices, MongoDB...




Preferred Environment

Slack, Node.js, Koa, PostgreSQL, MongoDB, Jira, TypeScript, Confluence, NestJS, JavaScript

The most amazing...

...project I've worked on is a photo and video editing platform with over 20 million downloads. I developed a major part of its subscription and payment system.

Work Experience

Senior Back-end Engineer

2023 - PRESENT
  • Contributed to and improved the existing codebase using Node.js, DynamoDB, and AWS services.
  • Designed and developed a NestJS, AWS SAM, and DynamoDB service for organization management within the application accounts.
  • Added and worked on integrations with 3rd-party APIs: Tempus Ex (Infinite Athlete), Slack, PhotoShelter, and Getty, and created proxies for web and mobile clients.
  • Worked with various media format assets, including filters, audio, fonts, image, and video formats.
  • Integrated AWS services such as EventBridge (EventBus), Cognito (CIAM), Lambda, CloudFront, SES, and S3.
  • Maintained communication between clients (front end: web, mobile), management, product, and back-end teams; delivered on time and provided status updates in Slack.
  • Troubleshot and resolved API security issues of publicly available keys.
  • Created GitHub pipelines and actions for deployments and CI/CD.
  • Documented processes and created technical requirement documents in Confluence and Notion.
  • Created and managed tickets/issues in Linear and Jira and conducted code reviews.
Technologies: Node.js, AWS SDK, AWS Lambda, Amazon DynamoDB, EventBus, Amazon S3 (AWS S3), Amazon CloudFront CDN, LexoRank, OpenAI, Zod Schema, NestJS, AWS Serverless Application Model (AWS SAM), Serverless, Slack, Tempus Ex, Datadog, Amazon EventBridge, AWS CloudFormation, Technical Writing, Documentation, App Development, Webhooks, JSON, Architecture, Cloud Architecture, TypeScript

BigCommerce Expert

2024 - 2024
Lake Country Growers, Inc.
  • Identified outdated development APIs and secret keys in Klaviyo. Transitioned to new versioned APIs after consulting with the support team.
  • Used BigCommerce to identify the apps used for the website.
  • Created new development keys with broader permissions and updated them on RevenueHunt. Communicated with the RevenueHunt team and made sure the outdated APIs were corrected.
  • Kept status updates and communicated with the client via Gmail/Zoom. Provided detailed documentation of the completed work.
Technologies: API Integration, APIs, Klaviyo, BigCommerce, HTML, JSON, Ruby, PHP

Senior Software Engineer

2020 - 2023
  • Designed and developed a microservice for subscription and monetization of the platform using Node.js and NestJS. Separated and refactored the microservice from the main monolith architecture of the app.
  • Added RESTful APIs and event handling support for Apple, Google, WeChat, Alipay, Adyen, PayPal, and Docomo purchases and subscriptions.
  • Created a Jenkins job based on Kubernetes and Docker for accessing and running needed queries with a database often used for old and new data correction.
  • Integrated event tracking for Apple and Google used for saving payment event callbacks, such as cancel, purchase, and on hold, into a database and updating existing order info.
  • Integrated Datadog for error handling and viewing data using charts.
  • Used Jira for task creation, bug reports, and project maintenance.
  • Generated REST APIs with documentation such as Swagger or Postman Collections for client usage and client library generation.
  • Integrated external analytical event handling using AppsFlyer, Braze, Facebook events, and other services.
  • Transferred repositories from GitHub to GitLab and set up automation pipelines, jobs, and deployments.
  • Covered project APIs with unit and integration tests using Jest.
Technologies: JavaScript, Node.js, Express.js, Microservices, RESTful Microservices, MongoDB, Kubernetes, Mongoose, Docker, Apple Pay, Android Pay, WeChat, PayPal, Adyen Payments, Stripe, Git, GitHub, TypeScript, NestJS, APIs, REST, REST APIs, GitLab, GitLab CI/CD, Integration, Integration Testing, Unit Testing, Swagger, Postman, Back-end, ESLint, Payment APIs, Jira, Confluence, NoSQL, CI/CD Pipelines, Web Development, Mobile Development, Kubernetes Operations (kOps), Kube, API Integration, Technical Writing, Documentation, App Development, Webhooks, JSON, BigCommerce, Architecture, Technical Leadership, Big Data

Software Engineer

2022 - 2022
  • Architected and developed a back-end application using TypeScript and TypeORM, coupled with MongoDB's large dataset database.
  • Developed a generally used uploader for validation and uploading files to AWS S3 using temporary security credentials based on assuming role functionality of AWS SNS.
  • Used Apache Kafka for ingesting files or data to one or more targets from multiple data sources such as Kafka, MongoDB, or plain body.
  • Contributed to the process of creating and running Airflow DAGs for managing database tasks.
  • Covered project APIs with unit and integration tests using Jest.
Technologies: TypeORM, Apache Kafka, Apache Airflow, Amazon S3 (AWS S3), Amazon Simple Notification Service (Amazon SNS), APIs, REST, REST APIs, Integration Testing, Unit Testing, NestJS, Back-end, ESLint, Auth0, Amazon Web Services (AWS), Jira, Confluence, Postman, Web Development, OAuth, OAuth 2, JSON

Back-end Engineer

2021 - 2022
  • Developed a REST API multi-environment server application based on TypeScript and Express.
  • Set up Redshift and DocumentDB database schemas, models, and relations using TypeORM. Experienced aggregated queries and complex joins for interaction with large data sets.
  • Added machine-to-machine and web server Auth0 authorization for application security in development and production environments. Created user groups, roles, and permissions for user management and ACL.
  • Developed and deployed Swagger Docs for the application with basic and Auth0 authorizations.
  • Created Dockerfiles for application and Swagger deployment.
  • Configured test environment using Jest and added integration and unit test coverage for all of the APIs.
  • Created Confluence pages with technical documentations.
Technologies: TypeScript, TypeORM, JavaScript, Node.js, Express.js, Redshift, Amazon, Amazon S3 (AWS S3), SQL, DocumentDB, Winston, Swagger, Auth0, Confluence, ACL, ESLint, REST APIs, APIs, Back-end, Amazon Web Services (AWS), Jira, Integration Testing, Postman, Web Development, API Integration, OAuth, OAuth 2, JSON, MySQL, Big Data

Back-end Engineer

2018 - 2020
  • Developed REST APIs based on Koa Framework with Passport user authentication support.
  • Designed a PostgreSQL-based database and worked on it with Sequelize ORM and Redis for key-value storing.
  • Integrated ACL for role-based access management and permission control for different user roles.
  • Designed and developed a small application based on AWS Lambda functions for storing website survey information in AWS DynamoDB Database.
  • Integrated many in-app and push notifications services, such as AWS SNS, Socket.IO, and SendGrid for email notifications.
  • Created Docker files for app deployment with the combination of Docker Compose Yamls for multi-container running.
  • Integrated Stripe Payments for payment transactions.
  • Published an article called How to Implement Stripe Connect Payment System on Your Application Using Node.js to Medium.
  • Worked on an Agile framework for tracking and fixing bugs on Jira.
  • Integrated POEditor for website and mobile localization.
Technologies: Node.js, Koa, REST, Web MVC, PostgreSQL, Sequelize, Docker, Docker Compose, Passport.js, Amazon Web Services (AWS), PostgreSQL 10, SQL, Amazon DynamoDB, AWS Lambda, Lambda Functions, Back-end, Artificial Intelligence (AI), REST APIs, APIs, ESLint, Jira, ACL, Confluence, Postman, Web Development, Mobile Development, Amazon RDS, Amazon Virtual Private Cloud (VPC), API Integration, Technical Writing, JSON, MySQL, HTTPS

Front-end Engineer

2017 - 2018
  • Developed responsive single-page applications and websites using HTML5, CSS, Bootstrap, jQuery, and JavaScript. Added interactive functionalities using JavaScript and jQuery.
  • Created website animations using CSS keyframes, transforms, and transitions.
  • Created Grunt and Gulp tasks for handling and automating the front-end build processes and code flow.
Technologies: HTML, HTML5, CSS, jQuery, JavaScript, Grunt, Gulp, Bootstrap, Jira, React

A photo and video editing app and website. The back end consists of both monolith and microservice architecture based on Express.js technologies using dependency injection, MVC pattern, and REST API. For the database, a non-relational Mongo database is used with the help of Mongoose ORM and replication. Also, for event publishing and key-value storage, Redis pub/sub and Kafka are used.

For payments and subscriptions, external services with monthly and yearly subscription handling were implemented. We have Apple, Android, and WeChat payments integrated on the mobile end of things along with an external job for renewals and order state change tracking. On the desktop web side, PayPal, Adyen, Stripe, and Docomo are integrated with the support of one-time payments and renewal using jobs.

Analytics are incorporated that fire events into Appsflyer, Braze, FB events, and other services.

SABX is a B2B platform with role access-based management and permission control developed on Node.js technologies.

I was a back-end developer working from the begging till the platform's successful launch and real user onboarding. I was developing REST APIs on Koa with Passport user authentication. For the database, we used PostgreSQL with the support of Sequelize ORM and Redis for key-value storing.

For file management, server, in-app, and push notifications, AWS services were used, such as S3 and SNS combined with Firebase for mobile side integration. For real-time website notifications, Socket.IO was used. Also, we were using mail listeners and mail sending services for in-time notification such as SendGrid.

For deployment and multi-container running we were using Docker Compose.

On the payment side, for one-time payments, I integrated PayPal and Stripe, on which I have a published article on Medium.

I was a web product creator for agricultural data access and sharing purposes. As a software engineer, I was in charge of developing and maintaining the website server. The website uses TypeScript, TypeORM technologies, and Auth0 for authorization and authentication flows. As a back-end developer, I created a set of Restful APIs responsible for returning large amounts of soil data from PostgresSQL databases. To handle the big data sets, I used a data pipeline to stream and validate the data via Kafka streams before storing it in Redshift for further processing.

Yara International
As a back-end engineer, I was a key member of the development team for the Yara project, where I was responsible for developing and maintaining several TypeScript services that provided APIs for the production, distribution, and sale of nitrogen-based mineral fertilizers and related industrial products. I have a strong understanding of MongoDB, which I used to manage and store large data sets effectively. I also have experience with TypeORM and AWS S3 for data management and file uploading.

I developed a generally used uploader for validation and uploading files to AWS S3 using temporary security credentials based on assuming the role functionality of AWS SNS. I also used Apache Kafka for ingesting files or data to one or more targets from multiple data sources such as Kafka, MongoDB, or plain body. I also contributed to the process of creating and running Airflow DAGs for managing database tasks and covered project APIs with unit and integration tests using Jest. This ensured the reliability, scalability, and maintainability of the project.
2015 - 2019

Bachelor's Degree in Computer Science

American University of Armenia - Yerevan, Armenia


Node.js, Lodash, Passport.js, REST APIs, Socket.IO, Android Pay, Stripe, Winston, jQuery, Zod Schema, React


Mongoose, Slack, Sequelize, Adyen Payments, Jira, GitHub, Git, Confluence, GitLab, GitLab CI/CD, Postman, SendGrid, Amazon Simple Notification Service (Amazon SNS), WeChat, Docker Compose, Auth0, ACL, Grunt, Gulp, Apache Airflow, Amazon Virtual Private Cloud (VPC), Kafka Streams, AWS SDK, Amazon CloudFront CDN, Lightworks, AWS CloudFormation


Express.js, Koa, NestJS, Swagger, Kube, OAuth 2, Bootstrap, AWS Serverless Application Model (AWS SAM)


JavaScript, SQL, TypeScript, HTML, HTML5, CSS, Python, Ruby, PHP


REST, Unit Testing, Mobile Development, App Development, Microservices


PostgreSQL, Amazon S3 (AWS S3), PostgreSQL 10, NoSQL, JSON, MongoDB, Amazon DynamoDB, MySQL, Redshift, Datadog


Kubernetes, Docker, Firebase, AppsFlyer, Amazon Web Services (AWS), Amazon, Apache Kafka, AWS Lambda, BigCommerce, Klaviyo


Web MVC, Payment APIs, ESLint, Back-end, APIs, Integration, Integration Testing, Web Development, API Integration, Technical Writing, Documentation, Webhooks, Architecture, Technical Leadership, RESTful Microservices, PayPal, WeChat Pay, Apple Pay, TypeORM, Lambda Functions, CI/CD Pipelines, Amazon RDS, Kubernetes Operations (kOps), OAuth, HTTPS, Big Data, DocumentDB, Artificial Intelligence (AI), EventBus, LexoRank, OpenAI, Serverless, Tempus Ex, Machine-to-Machine (M2M), Amazon EventBridge, Cloud Architecture, Slate

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