Oleksandr Ulianets
Oleksandr Ulianets

Senior Full-Stack Software Engineer

Actively looking · Member since 29 Oct 2026
Location
Lublin, Poland
Desired salary
Unspecified
Work preference
Remote Only / Contract
Experience level
Senior

About

Professional summary

I am a Senior Full-Stack Software Engineer with more than nine years of commercial experience and twelve years of overall programming experience. I build customer-facing SaaS products and enterprise applications across frontend, backend, APIs, databases, cloud infrastructure, and production support.

I specialize in TypeScript, JavaScript, React, Next.js, Node.js, GraphQL, and SQL-based data systems. I enjoy translating business requirements into scalable technical solutions, reusable components, reliable services, and maintainable product architecture.

I have delivered software for pharmaceutical technology, EdTech platforms serving more than 50,000 active users, enterprise collaboration tools, e-commerce, CMS, and booking products. My work includes real-time functionality, asynchronous processing, event-driven services, API design, database integration, and performance optimization.

I bring more than four years of technical leadership experience, including architecture decisions, mentoring, code reviews, technical documentation, and collaboration with product managers, designers, QA engineers, and stakeholders. I take ownership from discovery and implementation through testing, deployment, observability, and incident resolution.

I also use AI-assisted development and intelligent automation to improve engineering productivity and product capabilities. I am particularly interested in full-stack product engineering roles where I can help teams build scalable, high-quality software remotely across the European Union.

Notice period: 2 weeks

Skills

53 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Senior Full-Stack Software Engineer SD Solutions

I design, develop, and maintain production full-stack applications for an enterprise pharmaceutical technology platform. I build customer-facing interfaces and backend services using React, Next.js, TypeScript, Node.js, Python, FastAPI, AWS, and multiple SQL and NoSQL data stores.

I contribute to architecture, API contracts, database integrations, asynchronous processing, and cloud infrastructure. I improved backend response times by approximately 30% through architecture optimization, reduced manual information retrieval effort by about 25% through AI-powered automation, and improved observability to support approximately 20% faster incident resolution.

Senior Full-Stack Engineer Intetics

I developed and maintained customer-facing functionality for an EdTech SaaS platform serving more than 50,000 active users. I built reusable frontend components, scalable backend integrations, and end-to-end workflows using React, Next.js, TypeScript, Node.js, GraphQL, and SQL.

I collaborated with product managers, designers, QA engineers, and developers on architecture, personalized learning experiences, AI-powered recommendations, performance improvements, and production support. My contributions to testing and CI/CD improvements helped reduce post-deployment issues by approximately 25%.

Software Engineer GlobalLogic

I developed and maintained enterprise collaboration and real-time communication software using React, TypeScript, Java, REST APIs, and AWS. I implemented frontend features and integrations with distributed backend services.

I built real-time communication capabilities with WebSockets and AWS Chime SDK, supported asynchronous data updates, and contributed to scalable application design, debugging, testing, deployment, and performance optimization alongside international engineering teams.

Frontend Engineer YozmaTech

I developed production e-commerce web applications with customer-facing interfaces and complex shopping workflows. I used React, Next.js, JavaScript, Redux, and REST APIs to build reusable UI components, responsive pages, and integrated product functionality.

I improved frontend performance, usability, and maintainability while collaborating with engineering teams on technical implementation, testing, backend integrations, and releases.

Full-Stack Developer Lionwood

I developed full-stack functionality for commercial SaaS, CMS, booking, and e-commerce applications. My work included React and Node.js development, JavaScript, SQL, backend APIs, business logic, authentication, and database integrations.

I created user-facing workflows for booking, content management, and e-commerce, integrated external and payment-related services, and contributed to application testing, deployment, maintenance, and ongoing product delivery.

Frontend Developer N-iX

I developed enterprise application interfaces using React, Redux, TypeScript, and JavaScript. I integrated frontend functionality with backend services in a Spring MVC-based application environment.

I worked closely with engineering teams on implementation, debugging, testing, and delivery of reliable user-facing application features.

Education

Learning history
No education data available.

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