10/29/2026 updated
PM
100 % available
Senior Software Engineer | Angular & React | Team Lead | AWS | Full Stack
Warsaw, Poland
Only remote
Computer Science, Belarusian State University of Informatics and RadioelectronicsAbout me
Senior Software Engineer / Tech Lead with 8+ years building enterprise apps. TypeScript, Angular, React, Node.js, NestJS, databases and AWS. Lead architecture, delivery and mentoring. Design AI engineering workflows, reusable agent skills and orchestration across teams.
Amazon CloudfrontNoSQLAWS CLIAngular 2+SQL DatabasesWorkflowsRxJSAWS LambdaBackendFull Stack DevelopmentFront End Software DevelopmentNestJSTerraform
Senior Software Engineer / Tech Lead with 8+ years of experience building and modernizing enterprise web applications across HRTech, insurance, CRM, workflow automation, and marketplace products. I combine hands-on full-stack development with architecture, technical leadership, and production delivery.
Frontend: Angular (7–21), React, TypeScript, JavaScript, RxJS, NgRx, NGXS, Redux Toolkit, and Next.js. Experienced in complex business workflows, reusable component libraries, state management, and performance optimization. Led Angular upgrades and AngularJS-to-Angular migrations, and modernized React applications from class components to Hooks. Delivered 55% faster load times and approximately 30% better page responsiveness on an enterprise HRTech platform.
Backend & integrations: Node.js, NestJS, Express.js, REST APIs, and microservices. Built shared authentication services and integrated Okta, enterprise APIs, Google Sheets, Salesforce, and Zoho. Database experience includes MongoDB, PostgreSQL, MySQL, DynamoDB, and Amazon RDS.
Cloud & delivery: AWS Lambda, S3, CloudFront, API Gateway, CodePipeline, and CodeBuild; Docker, Terraform, serverless architecture, CI/CD, release automation, and cost optimization. Experience supporting production deployments, investigating integration issues, and delivering releases across multiple environments.
Testing & quality: Jest, Jasmine, Cypress, unit and integration testing, code reviews, and refactoring. Increased test coverage to 90%+ on an enterprise platform.
AI engineering: Designed and rolled out a shared AI-assisted engineering workflow across multiple teams. Built a reusable AI meta-repository with project instructions and engineering context. Authored 10 custom agent skills and integrated 3 open-source skills into a 13-skill toolkit covering ticket analysis, code discovery, implementation planning, Angular/NestJS changes, MongoDB impact checks, testing, and review preparation. Introduced context-based skill orchestration and trained engineers in model selection and prompting, with engineering validation and code review throughout delivery.
Leadership: Technical delivery ownership, architecture decisions, estimation, release planning, mentoring, technical interviews, and resource management. Comfortable working directly with customers and stakeholders, translating requirements into implementation, and owning initiatives from discovery through production release.
Experience
Professional experience0 - 5 years
Freelancer since2026
Languages
EnglishFluentPolishFluentRussianNative speaker
Project history
Senior Software Engineer, Team Lead, and Resource Manager on multiple enterprise projects at Mercer. Responsibilities included Angular migration (Angular 19 to 21), Okta-based authentication, NestJS microservice development, AWS operations and cost optimization, CI/CD with CodePipeline and CodeBuild, full-stack feature delivery for HRTech and insurance platforms, AI engineering workflow rollout, resource allocation, mentoring, and hiring. Achieved 55% faster load times, 30% better page responsiveness, 90%+ test coverage, and 40% improvement in team efficiency.
Senior Frontend Engineer on a multi-module business management platform covering marketing, CRM, sales, HR, support, and inventory. Delivered new features and business logic, led frontend implementation, developed and integrated frontend/backend functionality using Angular, NGXS, NestJS, and MongoDB, fixed 50+ bugs, mentored developers, and conducted technical interviews.
Frontend Developer and Team Lead on Zegoal, an online and mobile marketplace connecting users with local freelancers. Delivered new frontend features, led migration from class-based React components to React Hooks, integrated frontend with Django/Python/PostgreSQL backend, optimized React/Redux performance reducing response times by 20%, and increased user engagement by 12%.