Mariam is available for hire
Hire MariamMariam Chargeishvili
Verified Expert in Engineering
Back-end Developer
Location
Tbilisi, Georgia
Toptal Member Since
April 27, 2021
Mariam is a technically proficient developer with excellent theoretical skills (she's currently in the midst of finishing her master's degree in CS). She has several years of experience in the development, analysis, testing, and maintenance of deadline-oriented high-volume systems as well as a range of products and clients—from e-wallets to ERP management systems. Mariam excels at designing large-scale back-end systems with best practices and the latest technologies.
Portfolio
Bazaarvoice, Inc - Main
TypeScript, REST, REST APIs, APIs, Python, Amazon Cognito, Big Data...
Volvo R&D Center - Main
Node.js, TypeScript, GraphQL, JavaScript, Git, Amazon Web Services (AWS), Azure...
Car Manufacturer Company (Toptal Client)
Agile, APIs, Node.js, TypeScript, Sequelize, CI/CD Pipelines, Terraform, Redis...
Experience
Availability
Full-time
Preferred Environment
WebStorm, Git, Jira, Slack, MacOS
The most amazing...
...thing I've ever developed is WorkflowRT: a user-friendly cloud-based patient-flow solution that automates workflows using real-time location technologies.
Work Experience
Senior Back-end Engineer
2023 - PRESENT
Bazaarvoice, Inc - Main
- Migrated authentication from monolith to new microservice for an eCommerce data platform.
- Moved the user's authentication data to Amazon Cognito.
- Created a member's service for managing user's data.
Technologies: TypeScript, REST, REST APIs, APIs, Python, Amazon Cognito, Big Data, Large Data Sets, Amazon Web Services (AWS), JavaScript, Terraform, Kubernetes, Django, Apache, NestJS, CI/CD Pipelines, Domain-driven Design (DDD), AWS Lambda, Amazon DynamoDB, Serverless, NoSQL, API Development, GraphQL
Senior Software Engineer
2022 - 2023
Volvo R&D Center - Main
- Managed the communication between Volvo and Polestar regarding the launch of existing software in new markets.
- Designed and developed new features for Backstage Soft, a booking engine for Volvo car maintenance.
- Used technologies such as TypeScript, Node.js, Express.js, Jest, Redis, Pub/Sub, and PostgreSQL.
- Managed 3rd-party integrations for service providers.
- Implemented new features and wrote unit and E2E tests.
Technologies: Node.js, TypeScript, GraphQL, JavaScript, Git, Amazon Web Services (AWS), Azure, HTML, Test-driven Development (TDD), Back-end, Back-end Development, NoSQL, Amazon DynamoDB, APIs, API Development, AWS Lambda
Senior Software Engineer
2021 - 2022
Car Manufacturer Company (Toptal Client)
- Served as a senior software engineer for Cruise, the company producing the world’s most advanced self-driving vehicles to safely connect people with the places, things, and experiences they care about.
- Designed and developed new features for “dispatch,” the application component that communicates between users and vehicles and makes decisions about matching, batching, delivery, shift breaks, etc.
- Used technologies such as TypeScript, Node.js, Express.js, Jest, Redis, Pub/Sub, and PostgreSQL.
Technologies: Agile, APIs, Node.js, TypeScript, Sequelize, CI/CD Pipelines, Terraform, Redis, NestJS, Microservices Architecture, Microservices, SQL, PostgreSQL, HTML, Test-driven Development (TDD), Git, Back-end, Back-end Development, Apache Kafka, Amazon Web Services (AWS), NoSQL, Amazon DynamoDB, API Development, GraphQL, AWS Lambda
Tech Lead
2018 - 2021
Adjarabet
- Developed and maintained the back end of e-wallets with thousands of customers.
- Constructed a REST API with OAuth authentication and integrated external payment provider systems for transfers and service payments.
- Made a CI/CD infrastructure and deployed the project with GitLab CI in three environments with feature branches; also worked with GitFlow.
- Built the architecture for the back end, created pre-commit hooks, enforced code-quality rules (ESLint, Prettier), and wrote tests (unit and E2E).
- Aided in planning product development and timelines.
- Reviewed other developers' code, helped new team members with onboarding, and was involved in the recruiting process.
Technologies: CI/CD Pipelines, Node.js, Express.js, PostgreSQL, MongoDB, Redis, GitFlow, Socket.IO, Microservices, Amazon Web Services (AWS), Amazon S3 (AWS S3), Amazon Cognito, Amazon Aurora, TypeScript, Design Patterns, Object-oriented Programming (OOP), Agile, OAuth, Scrum, Jest, JavaScript, APIs, REST APIs, Back-end, NoSQL, HTML, Test-driven Development (TDD), Git, Back-end Development, Apache Kafka, Big Data, Large Data Sets, React, Serverless, AWS Lambda, Amazon DynamoDB, API Development
Senior Full-stack Engineer
2019 - 2020
Infinite Leap
- Developed a large-scale, low-latency, real-time location system for clinics.
- Implemented a micro frontend using Angular and NgRx and the microservice architecture with Node.js and NestJS.
- Helped research best-practice solutions to integrate them into the software.
- Deployed continuous integration and continuous delivery with GitLab CI/CD and composed unit and end-to-end (E2E) tests.
- Used a message broker (RabbitMQ) and sockets for real-time solutions.
Technologies: Node.js, NestJS, Angular, RabbitMQ, Socket.IO, PostgreSQL, GitFlow, Agile, GraphQL, Design Patterns, Object-oriented Programming (OOP), Data Structures, CI/CD Pipelines, TypeScript, OAuth, Scrum, Jest, NgRx, JavaScript, APIs, REST APIs, Microservices Architecture, Microservices, AngularJS, HTML, Full-stack, Git, Back-end, Back-end Development, API Development
Senior Software Engineer
2018 - 2018
Innovato
- Developed a Forex, CFD, and cryptocurrency price-prediction system. It was based on real-time data from the marketplace and technical indicators like EMA, Bollinger Bands, stochastic, etc.
- Planned the architecture of a project, managed deployments, and scheduled software releases.
- Developed services for a financial, user-customized news feed.
Technologies: Redis, GitFlow, CI/CD Pipelines, MySQL, MongoDB, Angular, Socket.IO, Amazon Web Services (AWS), TypeScript, Node.js, Express.js, JavaScript, APIs, REST APIs, Jest, HTML, Git, Back-end, Back-end Development, API Development
Visiting Lecturer
2016 - 2017
GITA's
- Created a PHP course for university students which included preparing learning materials and designing a course schedule.
- Taught software development using PHP, Laravel, and relational database modeling with MySQL; worked to improve students' computational thinking and problem-solving skills.
- Prepared exams and a grading system for the course.
Technologies: PHP, Laravel, Object-oriented Programming (OOP), Design Patterns, HTML, Back-end, Back-end Development
Software Engineer
2016 - 2017
Leavingstone
- Built a custom content-management system (CMS) and services (Angular Material and Laravel) for a mobile application for one of the largest telecommunication companies in Georgia.
- Refactored a series of web applications, monitored the existing system, created unit tests, and fixed bugs.
- Developed many web applications from scratch (Laravel, Angular) and built services for mobile applications.
Technologies: PHP, Laravel, MySQL, Redis, REST, Angular, Object-oriented Programming (OOP), CI/CD Pipelines, GitFlow, JavaScript, APIs, REST APIs, HTML, Full-stack, Git, Back-end, Back-end Development, API Development
Software Engineer
2015 - 2016
Freelance
- Developed a push-notification system with a subscription module from scratch.
- Managed deployments on AWS with GitLab CI pipelines.
- Implemented the Firebase SDK to send notifications based on user segmentation and other notification types.
Technologies: Agile, Node.js, Express.js, Firebase Web SDK, REST, Redis, TypeORM, TypeScript, Amazon Web Services (AWS), JavaScript, APIs, REST APIs, HTML, Git, Back-end, Back-end Development
Experience
WorkflowRT | Real-time Location System for Clinics
https://infiniteleap.net/WorkflowRT is a user-friendly cloud-based patient-flow solution that automates workflow and communication using real-time location technologies (RTLS). It gives us real-time visibility into the current locations and status of patients—from their arrival to disposition—so staff can manage their workflows better and be aware of any potential bottlenecks or long patient wait times and so on.
The project is based on microservices architecture using Node.js/Nest.js and Angular. I worked on the project as a senior full-stack developer.
The project is based on microservices architecture using Node.js/Nest.js and Angular. I worked on the project as a senior full-stack developer.
Incognito | E-wallets for Adjarabet Customers
https://incognito.ge/Adjarabet is the number one gambling company in Georgia. It has its own card called Incognito, so you can easily transfer money or any other transactions from your Adjarabet balance. To support those operations, we created an e-wallet.
The project is based on microservices architecture, using Node.js/Express.js. I designed the back end of the app, implemented OAuth, transaction processing, integrated external payment services, among others.
The project is based on microservices architecture, using Node.js/Express.js. I designed the back end of the app, implemented OAuth, transaction processing, integrated external payment services, among others.
Crypto Trading Suggestion App
I developed a Forex, CFD, and cryptocurrency price-prediction system. It was based on real-time data from the marketplace and technical indicators like EMA, Bollinger Bands, stochastic, etc.
I worked on the back end of the application using a tech stack like Node.js, Express.js, Sockets, Redis, CI/CD, PostgreSQL, etc.
I worked on the back end of the application using a tech stack like Node.js, Express.js, Sockets, Redis, CI/CD, PostgreSQL, etc.
Skills
Languages
TypeScript, HTML, GraphQL, JavaScript, PHP, SQL, Python
Frameworks
Express.js, NestJS, Laravel, Angular, Jest, AngularJS, Django
Libraries/APIs
Node.js, REST APIs, API Development, Socket.IO, Redis Queue, Twilio API, NgRx, RxJS, Firebase Web SDK, React
Paradigms
Object-oriented Programming (OOP), REST, Test-driven Development (TDD), Design Patterns, Microservices, Scrum, Agile, Microservices Architecture
Other
GitFlow, TypeORM, APIs, Back-end Development, Domain-driven Design (DDD), Data Structures, OOP Designs, CI/CD Pipelines, OAuth, Serverless, Algorithms, Calculus, Linear Algebra, Transactions, Pub/Sub, Cloud, Back-end, Full-stack, Big Data, Large Data Sets
Tools
RabbitMQ, Amazon Cognito, Sequelize, Terraform, Git, Apache
Platforms
Apache Kafka, AWS Lambda, Docker, MacOS, Amazon Web Services (AWS), Azure, Kubernetes
Storage
MySQL, PostgreSQL, MongoDB, Redis, Amazon S3 (AWS S3), Redis Cache, Amazon DynamoDB, Amazon Aurora, NoSQL, Neo4j
Education
2019 - 2021
Master's Degree in Computer Science
Tbilisi State University - Tbilisi, Georgia
2014 - 2018
Bachelor's Degree in Computer Science
Tbilisi State University - Tbilisi, Georgia
Certifications
OCTOBER 2021 - PRESENT
AWS Certified Cloud Practitioner
Amazon Web Services
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