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Oleksandr
C# програміст
- City:
- Uzhhorod
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Oleksandr P.
Senior Backend Engineer
PROFESSIONAL SUMMARY
• Senior Backend Engineer with 12+ years of experience designing and delivering scalable web applications,
microservices, and cloud-native solutions across SaaS and enterprise domains.
• Proven Senior Developer with a track record of driving CI/CD pipeline optimization, tech debt reduction, and
engineering best practices across cross-functional teams of up to 15+ engineers.
• Deep expertise in the JavaScript/TypeScript ecosystem — Node.js (NestJS, Express.js), React.js, Angular, and
Vue.js — combined with strong .NET Core, C#, and Python capabilities.
• Experienced in event-driven architecture using Apache Kafka, Confluent Flink, KSQL, and CQRS/Event Sourcing
patterns to build real-time, fault-tolerant data pipelines.
• Hands-on AWS practitioner: EC2, ECS, EKS, S3, Lambda, SQS, DynamoDB, RDS, Redshift — architecting and
operating production cloud workloads.
• Strong background in containerization and DevOps: Docker, Kubernetes, Jenkins, Concourse CI.
• Use AI-assisted coding tools to speed up development, debugging, refactoring, and test creation.
• Expertise in implementing intelligent data processing pipelines to clean, structure, classify, and enrich business
data.
TECHNICAL SKILLS
Languages JavaScript, TypeScript, C#, Python, Java, SQL
Back-End Node.js, NestJS, Express.js, KOA.js, .NET Core 10, ASP.NET Web API, Django, GraphQL,
RESTful API, Serverless, Microservices
Front-End React.js, Angular, Vue.js, RxJS, Socket.IO, Ionic, Material UI, PrimeNG, HTML5, CSS3,
SCSS
Event Streaming Apache Kafka, Confluent Kafka, Confluent Flink, Apache Flink, Confluent KSQL,
ZooKeeper
Databases MongoDB, PostgreSQL, MySQL, MSSQL, Redis, AWS DynamoDB, AWS Redshift, NoSQL
Cloud & DevOps AWS (EC2, S3, Lambda, DynamoDB, Redshift), Docker, Kubernetes, Jenkins, Concourse
CI, CI/CD pipelines
Testing MochaJS, Jest, Integration Testing, Performance Testing, E2E Automation
Patterns & Practices CQRS, Event Sourcing, DDD, SOLID, Clean Architecture, API Versioning, Code Review,
Agile/Scrum
Domain Expertise SaaS, HealthCare, Construction Tech, Eventing Data Warehouse, Real-Time Systems
WORK EXPERIENCE
KitRUM | Senior Backend Engineer I Project under NDA April 2018 – Present
Cloud-based construction program management SaaS platform delivering trusted insight into capital project
performance across the entire project lifecycle.
• Refactored legacy application modules using modern design patterns, reducing technical debt and improving
maintainability.
• Drove CI/CD pipeline optimization by introducing YAML-based templating across Jenkins and Concourse CI,
cutting pipeline configuration time by ~40%.
• Introduced Docker Compose for spinning up all environment dependencies in CI, enabling reliable integration test
runs.
Tech Stack: .NET Core 8, Confluent Kafka, Confluent KSQL, Confluent Flink, Apache Flink, Node.js, VB.NET, MSSQL, MongoDB, Redis,
PostgreSQL, AWS Redshift, AWS S3, AWS EKS, AWS ECS, Docker, Kubernetes, Angular, React.js, ZooKeeper, Jenkins, Concourse CI, xUnit
KitRUM | Full Stack JavaScript Developer I Project under NDA March 2021 – June 2022
HealthCare beauty app integrated with a Bluetooth-connected beauty device — iOS & Android.
• Rewrote critical database queries, reducing load by 30% and improving API response times.
• Introduced API versioning strategy, ensuring smooth transitions and backward compatibility.
• Planned and coordinated production deployments in line with release schedules.
Tech Stack: Node.js, React.js, AWS DynamoDB, AWS Lambda, AWS EC2
KitRUM | Full Stack JavaScript Developer | Project under NDA December 2019 – March 2022
Online veterinary consultation platform offering video calls, text chats, and subscription-based monthly check-ups for pet
owners.
• Rewrote critical queries, reducing database load by 30%.
• Implemented API versioning strategy for smooth backward-compatible transitions.
• Revamped Git branching workflow, reducing merge conflicts by 50%.
Tech Stack: Django, Angular 2, PostgreSQL, Docker, Ionic (cross-platform mobile)
BoostSolutions | Full Stack JavaScript Developer May 2015 – April 2018
• Developed and maintained full-stack web applications using Node.js, Angular, and React.
• Built RESTful APIs and integrated third-party services for client-facing SaaS products.
• Contributed to projects including LineKing (Firebase/Stripe), Azubi (Node.js/MongoDB/Angular 2), Tipit SDK (AR
Photo/Video), and ForFun (social photography platform).
Tech Stack: Node.js, Express.js, Angular, React, MongoDB, Firebase, Stripe SDK, AWS, TypeScript
Plati LLC | Software Developer April 2012 – May 2015
• Designed and implemented web-based software solutions for business clients.
• Developed backend services and frontend interfaces, collaborating closely with stakeholders for requirements
analysis.
Jabil | Test Department Engineer June 2009 – December 2011
• Supported Test equipment infrastructure and developed internal tooling for engineering department operations.
SELECTED PROJECTS
NDA – Enterprise Projects SaaS (Dec 2018 – May 2026)
Cloud-based software for capital project management with insights across the full project lifecycle.
Stack: .NET, Node.js, Express.js, React.js, Angular 6, PrimeNG, MongoDB, MSSQL, PostgreSQL, ConcourceCI, Jenkins, OpenTelemetry,
NewRelic, SumoLogic, Kafka, Confluent SchemaRegistry, Docker, Kubernetes, Cursor AI, Copilot AI, Snyk, SonarQube
NDA – Enterprise Integration Platform (Dec 2018 – Dec 2019)
Cloud-based enterprise integration software running thousands of automated tasks per minute — invoices, CRM
updates, real estate listings, lead routing.
Stack: Node.js, .NET, VB.NET, MongoDB, MSSQL, ZooKeeper, AWS, Angular, React, Jenkins, Circle CI
LineKing – Mobile App (Sep 2015 – Feb 2016)
Fast-pass app for businesses connecting consumers with same-day access slots. Integrated Stripe payments and Firebase
backend.
Stack: Google Firebase, Express.js, Node.js, FCM, Stripe SDK
EDUCATION
Lviv Polytechnic National University | Sep 2002 – Jun 2007
Master of Computer Engineering
LANGUAGES
English Upper-Intermediate (B2)
Ukrainian Native
Contacts
e-mail [open contact info ](look above in the "contact info" section)
phone [open contact info ](look above in the "contact info" section)
Senior Backend Engineer
PROFESSIONAL SUMMARY
• Senior Backend Engineer with 12+ years of experience designing and delivering scalable web applications,
microservices, and cloud-native solutions across SaaS and enterprise domains.
• Proven Senior Developer with a track record of driving CI/CD pipeline optimization, tech debt reduction, and
engineering best practices across cross-functional teams of up to 15+ engineers.
• Deep expertise in the JavaScript/TypeScript ecosystem — Node.js (NestJS, Express.js), React.js, Angular, and
Vue.js — combined with strong .NET Core, C#, and Python capabilities.
• Experienced in event-driven architecture using Apache Kafka, Confluent Flink, KSQL, and CQRS/Event Sourcing
patterns to build real-time, fault-tolerant data pipelines.
• Hands-on AWS practitioner: EC2, ECS, EKS, S3, Lambda, SQS, DynamoDB, RDS, Redshift — architecting and
operating production cloud workloads.
• Strong background in containerization and DevOps: Docker, Kubernetes, Jenkins, Concourse CI.
• Use AI-assisted coding tools to speed up development, debugging, refactoring, and test creation.
• Expertise in implementing intelligent data processing pipelines to clean, structure, classify, and enrich business
data.
TECHNICAL SKILLS
Languages JavaScript, TypeScript, C#, Python, Java, SQL
Back-End Node.js, NestJS, Express.js, KOA.js, .NET Core 10, ASP.NET Web API, Django, GraphQL,
RESTful API, Serverless, Microservices
Front-End React.js, Angular, Vue.js, RxJS, Socket.IO, Ionic, Material UI, PrimeNG, HTML5, CSS3,
SCSS
Event Streaming Apache Kafka, Confluent Kafka, Confluent Flink, Apache Flink, Confluent KSQL,
ZooKeeper
Databases MongoDB, PostgreSQL, MySQL, MSSQL, Redis, AWS DynamoDB, AWS Redshift, NoSQL
Cloud & DevOps AWS (EC2, S3, Lambda, DynamoDB, Redshift), Docker, Kubernetes, Jenkins, Concourse
CI, CI/CD pipelines
Testing MochaJS, Jest, Integration Testing, Performance Testing, E2E Automation
Patterns & Practices CQRS, Event Sourcing, DDD, SOLID, Clean Architecture, API Versioning, Code Review,
Agile/Scrum
Domain Expertise SaaS, HealthCare, Construction Tech, Eventing Data Warehouse, Real-Time Systems
WORK EXPERIENCE
KitRUM | Senior Backend Engineer I Project under NDA April 2018 – Present
Cloud-based construction program management SaaS platform delivering trusted insight into capital project
performance across the entire project lifecycle.
• Refactored legacy application modules using modern design patterns, reducing technical debt and improving
maintainability.
• Drove CI/CD pipeline optimization by introducing YAML-based templating across Jenkins and Concourse CI,
cutting pipeline configuration time by ~40%.
• Introduced Docker Compose for spinning up all environment dependencies in CI, enabling reliable integration test
runs.
Tech Stack: .NET Core 8, Confluent Kafka, Confluent KSQL, Confluent Flink, Apache Flink, Node.js, VB.NET, MSSQL, MongoDB, Redis,
PostgreSQL, AWS Redshift, AWS S3, AWS EKS, AWS ECS, Docker, Kubernetes, Angular, React.js, ZooKeeper, Jenkins, Concourse CI, xUnit
KitRUM | Full Stack JavaScript Developer I Project under NDA March 2021 – June 2022
HealthCare beauty app integrated with a Bluetooth-connected beauty device — iOS & Android.
• Rewrote critical database queries, reducing load by 30% and improving API response times.
• Introduced API versioning strategy, ensuring smooth transitions and backward compatibility.
• Planned and coordinated production deployments in line with release schedules.
Tech Stack: Node.js, React.js, AWS DynamoDB, AWS Lambda, AWS EC2
KitRUM | Full Stack JavaScript Developer | Project under NDA December 2019 – March 2022
Online veterinary consultation platform offering video calls, text chats, and subscription-based monthly check-ups for pet
owners.
• Rewrote critical queries, reducing database load by 30%.
• Implemented API versioning strategy for smooth backward-compatible transitions.
• Revamped Git branching workflow, reducing merge conflicts by 50%.
Tech Stack: Django, Angular 2, PostgreSQL, Docker, Ionic (cross-platform mobile)
BoostSolutions | Full Stack JavaScript Developer May 2015 – April 2018
• Developed and maintained full-stack web applications using Node.js, Angular, and React.
• Built RESTful APIs and integrated third-party services for client-facing SaaS products.
• Contributed to projects including LineKing (Firebase/Stripe), Azubi (Node.js/MongoDB/Angular 2), Tipit SDK (AR
Photo/Video), and ForFun (social photography platform).
Tech Stack: Node.js, Express.js, Angular, React, MongoDB, Firebase, Stripe SDK, AWS, TypeScript
Plati LLC | Software Developer April 2012 – May 2015
• Designed and implemented web-based software solutions for business clients.
• Developed backend services and frontend interfaces, collaborating closely with stakeholders for requirements
analysis.
Jabil | Test Department Engineer June 2009 – December 2011
• Supported Test equipment infrastructure and developed internal tooling for engineering department operations.
SELECTED PROJECTS
NDA – Enterprise Projects SaaS (Dec 2018 – May 2026)
Cloud-based software for capital project management with insights across the full project lifecycle.
Stack: .NET, Node.js, Express.js, React.js, Angular 6, PrimeNG, MongoDB, MSSQL, PostgreSQL, ConcourceCI, Jenkins, OpenTelemetry,
NewRelic, SumoLogic, Kafka, Confluent SchemaRegistry, Docker, Kubernetes, Cursor AI, Copilot AI, Snyk, SonarQube
NDA – Enterprise Integration Platform (Dec 2018 – Dec 2019)
Cloud-based enterprise integration software running thousands of automated tasks per minute — invoices, CRM
updates, real estate listings, lead routing.
Stack: Node.js, .NET, VB.NET, MongoDB, MSSQL, ZooKeeper, AWS, Angular, React, Jenkins, Circle CI
LineKing – Mobile App (Sep 2015 – Feb 2016)
Fast-pass app for businesses connecting consumers with same-day access slots. Integrated Stripe payments and Firebase
backend.
Stack: Google Firebase, Express.js, Node.js, FCM, Stripe SDK
EDUCATION
Lviv Polytechnic National University | Sep 2002 – Jun 2007
Master of Computer Engineering
LANGUAGES
English Upper-Intermediate (B2)
Ukrainian Native
Contacts
e-mail [
phone [
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.Net-програміст
20000 UAH, Uzhhorod, Remote -
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The candidate's resume is posted at https://www.work.ua/resumes/18713826/