Senior Full Stack Engineer - .NET / Angular Expert

Dawid Bisewski

Full Stack Developer (.NET/Angular)

***************@*****.*** +48-71-710-**** Warsaw, Mazowieckie, Poland

SUMMARY

Senior Full Stack Engineer with 13 years of experience delivering scalable enterprise applications across backend and frontend systems. Strong expertise in C#, .NET, Angular, TypeScript and cloud-native architectures using AWS and GCP. Experienced in building high-performance APIs, microservices and responsive web applications in distributed environments. Proven ability to lead end-to-end delivery from design to production with strong focus on clean code, scalability and reliability.

SKILLS

·Backend: C#, .NET, .NET 6+, Node.js, TypeScript, Java, Python

·Frontend: Angular, Angular 15+, React, HTML, CSS

·Frameworks: ASP.NET Core, ASP.NET MVC

·Cloud: AWS, GCP, Docker, Kubernetes

·Data: PostgreSQL, SQL Server, MongoDB, Redis, SQL

·Practices: CI/CD, Git, SVN, TDD, Unit Testing, Integration Testing

·Architecture: Microservices, REST APIs, Clean Architecture

·Observability: Prometheus, Grafana

EXPERIENCE

Senior Full Stack Engineer Ontra.ai 06/2024 - 05/2026

·Designed and delivered scalable backend services and full stack features using C#, .NET and TypeScript, supporting high-throughput enterprise workflows across distributed cloud environments with strict performance requirements.

·Built and maintained Angular based frontend modules integrated with REST APIs, improving performance, usability and reliability of enterprise dashboards used by internal and external stakeholders across platforms.

·Implemented microservice architectures in Node.js and .NET environments, focusing on API reliability, authentication flows and scalable integration patterns across cloud hosted infrastructure on AWS and GCP.

·Improved CI/CD pipelines using GitHub Actions and Docker containerization, reducing deployment times and ensuring consistent delivery across multiple production environments and distributed backend services.

·Optimized PostgreSQL queries and Redis caching layers to handle high volume transactional workloads, significantly improving system latency and ensuring stable performance under production traffic spikes.

·Collaborated with product managers and engineers to translate complex business requirements into maintainable technical solutions, ensuring alignment between architecture, scalability and product goals.

·Led integration efforts with external APIs and enterprise systems, implementing robust error handling, logging and monitoring using Prometheus and Grafana for improved system observability and stability.

·Participated in architecture discussions and code reviews, promoting clean code, SOLID principles and testable design practices across backend and frontend systems in a fast paced engineering environment.

Full Stack Engineer Doctor.One 03/2021 - 05/2024

·Developed full stack applications using TypeScript, Node.js and Angular components, building scalable platform features with strong emphasis on API driven architecture and responsive user interfaces.

·Implemented RESTful APIs and backend services with Node.js and PostgreSQL, ensuring secure data handling, authentication flows and consistent performance across distributed production systems.

·Built and optimized Angular 15+ frontend modules using RxJS and reactive patterns, improving state management, component reusability and performance of complex UI workflows.

·Designed and maintained CI/CD pipelines using Docker and GitHub Actions, enabling faster deployment cycles and reliable release processes across multiple environments and microservices.

·Integrated third party APIs and external services, ensuring robust webhook processing, error handling and data synchronization across backend systems and frontend applications.

·Worked closely with cross functional teams including product owners and QA engineers to deliver high quality features, aligning technical implementation with business requirements and user needs.

·Improved database performance through SQL tuning and indexing strategies in PostgreSQL, reducing query latency and increasing system throughput under growing user demand.

·Applied SOLID principles and clean architecture practices to maintain scalable and testable codebases across frontend and backend services in an agile development environment.

Full Stack Engineer Sidebench 04/2017 - 03/2021

·Contributed to enterprise full stack systems using JavaScript, Node.js and early .NET components, supporting client projects with scalable APIs and maintainable backend service architectures.

·Developed Angular based frontend applications and reusable UI components, ensuring consistent design implementation and responsive behavior across multiple client facing platforms.

·Built REST APIs and microservices deployed on AWS using Docker containers, improving system scalability, maintainability and deployment consistency across distributed environments.

·Implemented automated testing strategies including unit and integration tests, increasing code reliability and reducing regression issues in production environments.

·Collaborated with designers and backend engineers to translate requirements into functional features, ensuring timely delivery and alignment with client expectations and project goals.

·Optimized database queries and application performance using PostgreSQL and caching techniques, improving response times for high traffic enterprise applications.

Backend Software Engineer Asseco 09/2013 - 03/2017

·Developed enterprise backend systems using Java and early C#/.NET technologies, focusing on object oriented design, maintainability and scalable service oriented architecture principles.

·Worked on SQL Server databases, designing schemas, optimizing queries and ensuring data integrity for large scale transactional enterprise applications in regulated environments.

·Built internal web applications with JavaScript, HTML and CSS, supporting business workflows and improving usability of enterprise level software systems.

·Participated in early microservice adoption initiatives, contributing to modular system design and improving separation of concerns across backend components.

·Supported CI processes and version control workflows using Git and SVN, ensuring stable releases and collaboration across distributed engineering teams.

·Collaborated with stakeholders to gather requirements and deliver enterprise solutions, ensuring technical implementations aligned with business objectives and system constraints.

EDUCATION

Bachelor of Computer Science - Silesian University of Technology (2013)

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