based in Italy (born in Kiev, Ukraine)

Building reliable systems, end to end.

Karyna Siddik, Senior Software Engineer. Specializing in scalable backend systems and cloud architecture. Currently focused on multi-tenant platforms and reliable, high-throughput services.

~/contactzsh
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mail karynatariq@gmail.com
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open https://linkedin.com/in/karyna-tariq

5+

years shipping

2

teams

3

projects

50

technologies

What I work on

// overview

// summary

Senior Software Engineer with 5+ years building and maintaining production systems, with a strong focus on backend engineering, marketplace integrations, and cloud architecture. Experienced with Node.js, TypeScript, Python, PostgreSQL, MongoDB, AWS, serverless, microservices, Kafka, and Kubernetes. Engineered order-processing workflows handling 10K+ daily orders across marketplace and WMS integrations, covering inventory synchronization, third-party APIs, payment gateways, and subscription plans.

Experience

5+ years across 2 teams, from freelance to enterprise.

'21'23'25SkupremeFreelancer
now @ Skupreme2 roles

Projects

Shipped products, each with the problem, the build and the result.

~/projects3 itemsE-Commerce Automation Platformopen ↗Marketplace Order & Catalog S…→Multi-Tenant Backend Architec…→
shipped3 case studies

Education

.

~/education0 items
education0 degrees

Certifications

2 certifications, from Google and MongoDB University.

~/certifications2 itemsFoundations: Data, Data, Ever…open ↗M121: The MongoDB Aggregation…→
verifiedsince 2021

Stack

50 technologies used in production, grouped by where they sit.

JavaScriptTypeScriptPythonJavaNode.jsExpress.jsFastAPIREST APIsGraphQLOAuthMongoDBPostgreSQLDynamoDBFirebaseElastic Search
8 groupstypescript-first

Say hello

Based in Italy (born in Kiev, Ukraine). Email is the quickest way to reach me.

youhi karyna, got a minute?karynasure, let's talk
inbox openemail
+36 more
JavaScriptTypeScriptPythonJavaNode.jsExpress.jsFastAPIREST APIsGraphQLOAuthMongoDBPostgreSQLDynamoDBFirebase

Experience

// 2 roles

  1. Jan 2021 — Jun 2026

    Miami, US (Remote)

    Senior Software Engineer @ Skupreme

    • Built and maintained production backend services supporting marketplace and WMS integrations, order processing, inventory synchronization, and third-party API workflows.
    • Developed a dynamic multi-tenant architecture, reducing integration time by 25% and boosting platform reliability by 20%.
    • Implemented advanced backend API optimizations, reducing response times by 40% and increasing concurrent user capacity by 25%.

    JavaScript, TypeScript, Node.js, Express.js, PostgreSQL, MongoDB, AWS, Serverless, Microservices, Kafka, Kubernetes

  2. Jan 2021 — Jul 2021

    Remote

    Backend Engineer @ Freelancer

    • Maintained consistent 5-star ratings for project deliverables across 10+ diverse projects.
    • Delivered tailored backend solutions across diverse industries, ensuring optimal performance.

    JavaScript, Node.js, Express.js, MongoDB, Firebase, AWS Lambda, EC2

Education

// 0 degrees · 2 certifications

// degrees

    // certifications

    1. 2024

      Foundations: Data, Data, Everywhere

      Google

    2. 2021

      M121: The MongoDB Aggregation Framework

      MongoDB University

    Projects

    // 3 case studies

    01

    E-Commerce Automation Platform

    Scalable multi-tenant platform with full CRUD operations, inventory sync across multiple platforms, and automated order processing handling 10K+ daily orders. Built analytics dashboards with predictive algorithms for demand forecasting.

    Node.js, Express.js, MongoDB, AWS, Serverless, Microservices

    02

    Marketplace Order & Catalog Sync

    Real-time order synchronization engine connecting Amazon, Shopify, and eBay into a unified backend. Automated catalog listing, inventory updates, and order routing across platforms with event-driven pipelines.

    Node.js, Event-Driven Pipelines, MongoDB, AWS

    03

    Multi-Tenant Backend Architecture

    Dynamic multi-tenant architecture reducing integration time by 25%, featuring 3rd party marketplace integrations, address validation APIs, and scalable microservices with automated CI/CD pipelines.

    Node.js, Microservices, CI/CD, AWS, Infrastructure as Code

    Skills

    // 50 technologies

    Backend & APIs
    Node.jsExpress.jsPythonFastAPIJavaREST APIsGraphQLOAuth
    Databases
    MongoDBPostgreSQLDynamoDBFirebaseElastic Search
    Cloud & DevOps
    AWS (LambdaEC2S3)GCPKubernetesServerlessCI/CDNAT Gateways
    Architecture & Messaging
    MicroservicesServerlessEvent-driven systemsKafkaMulti-TenantInfrastructure as CodeAPI integrationsCron Schedulers
    Commerce & Payments
    Marketplace integrationsWMS integrationsOrder/inventory synchronizationPayment gatewaysSubscription plansPayment methods
    Testing & Tooling
    MochaChaiVitestBunCI/CDGit
    Languages & Tools
    JavaScriptTypeScriptPythonJavaGitNPMPostman
    Leadership
    Agile/ScrumTeam LeadershipMentorshipCode ReviewClient Collaboration

    // what's next

    Have something worth building?

    karynatariq@gmail.com
    github ↗linkedin ↗
    © 2026 Karyna Siddik · italy (born in kiev, ukraine)
    github ↗linkedin ↗email ↗