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Hi, I’m Krzysztof Kobayashi, a Senior FullStack Engineer based in Warsaw with over 8 years of experience building production-grade SaaS web applications across remote engineering teams. I have a strong background in React, TypeScript, Node.js, NestJS, REST APIs, microservices, and relational database modeling with PostgreSQL. I’ve led Docker-based delivery and Kubernetes cloud deployments, improved CI/CD workflows, and integrated third-party APIs for scalable, international solutions. I’m known for clear English communication, independent ownership, code review discipline, and practical engineering decisions in fully remote environments. I enjoy collaborating with product managers and cross-functional teams to design robust architectures, model data for consistency, and deliver high-quality features on time. My approach emphasizes maintainable code, automated testing, and repeatable deployments, enabling fast, reliable outcomes for international clients.…Hi, I’m Krzysztof Kobayashi, a Senior FullStack Engineer based in Warsaw with over 8 years of experience building production-grade SaaS web applications across remote engineering teams. I have a strong background in React, TypeScript, Node.js, NestJS, REST APIs, microservices, and relational database modeling with PostgreSQL. I’ve led Docker-based delivery and Kubernetes cloud deployments, improved CI/CD workflows, and integrated third-party APIs for scalable, international solutions. I’m known for clear English communication, independent ownership, code review discipline, and practical engineering decisions in fully remote environments. I enjoy collaborating with product managers and cross-functional teams to design robust architectures, model data for consistency, and deliver high-quality features on time. My approach emphasizes maintainable code, automated testing, and repeatable deployments, enabling fast, reliable outcomes for international clients.

Krzysztof Kobayashi

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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Hi, I’m Krzysztof Kobayashi, a Senior FullStack Engineer based in Warsaw with over 8 years of experience building production-grade SaaS web applications across remote engineering teams. I have a strong background in React, TypeScript, Node.js, NestJS, REST APIs, microservices, and relational database modeling with PostgreSQL. I’ve led Docker-based delivery and Kubernetes cloud deployments, improved CI/CD workflows, and integrated third-party APIs for scalable, international solutions. I’m known for clear English communication, independent ownership, code review discipline, and practical engineering decisions in fully remote environments. I enjoy collaborating with product managers and cross-functional teams to design robust architectures, model data for consistency, and deliver high-quality features on time. My approach emphasizes maintainable code, automated testing, and repeatable deployments, enabling fast, reliable outcomes for international clients.…Hi, I’m Krzysztof Kobayashi, a Senior FullStack Engineer based in Warsaw with over 8 years of experience building production-grade SaaS web applications across remote engineering teams. I have a strong background in React, TypeScript, Node.js, NestJS, REST APIs, microservices, and relational database modeling with PostgreSQL. I’ve led Docker-based delivery and Kubernetes cloud deployments, improved CI/CD workflows, and integrated third-party APIs for scalable, international solutions. I’m known for clear English communication, independent ownership, code review discipline, and practical engineering decisions in fully remote environments. I enjoy collaborating with product managers and cross-functional teams to design robust architectures, model data for consistency, and deliver high-quality features on time. My approach emphasizes maintainable code, automated testing, and repeatable deployments, enabling fast, reliable outcomes for international clients.

Available to hire

Hi, I’m Krzysztof Kobayashi, a Senior FullStack Engineer based in Warsaw with over 8 years of experience building production-grade SaaS web applications across remote engineering teams. I have a strong background in React, TypeScript, Node.js, NestJS, REST APIs, microservices, and relational database modeling with PostgreSQL. I’ve led Docker-based delivery and Kubernetes cloud deployments, improved CI/CD workflows, and integrated third-party APIs for scalable, international solutions. I’m known for clear English communication, independent ownership, code review discipline, and practical engineering decisions in fully remote environments.

I enjoy collaborating with product managers and cross-functional teams to design robust architectures, model data for consistency, and deliver high-quality features on time. My approach emphasizes maintainable code, automated testing, and repeatable deployments, enabling fast, reliable outcomes for international clients.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Senior FullStack Engineer at BJSS

March 2, 2024 - Present

Led development of customer-facing SaaS modules using React, TypeScript, Node.js, and NestJS, with clear module boundaries and reusable frontend patterns. Designed backend API layers with REST services, microservice-oriented modules, and structured validation flows to extend features for international client teams without fragile cross-service dependencies. Built relational data models in PostgreSQL for accounts and workflows, strengthening data consistency across transactional paths. Implemented third-party API integrations focusing on resilient error handling and traceable lifecycles. Improved Docker-based local development and deployment routines to reproduce environments more reliably across distributed teams. Supported Kubernetes and GCP deployment activities by preparing service configurations and resolving runtime issues. Conducted code reviews and refined TypeScript standards to improve code quality while maintaining fast delivery.

Senior FullStack Engineer at LearnUpon

August 1, 2019 - February 1, 2024

Delivered full-stack features for a SaaS Learning Management Platform using React, TypeScript, Node.js, and REST APIs, improving administrator and learner workflows. Created backend services for course enrollment, reporting, and notification workflows with clean API contracts and data-driven business rules. Modeled relational entities in PostgreSQL for organizations, users, courses, and activity records to improve data clarity. Integrated external SaaS and messaging APIs into platform workflows to automate user provisioning, notifications, and operational processes. Used Docker, CI/CD pipelines, and cloud deployment practices to support repeatable releases and reduce environment drift. Collaborated with product managers, QA, and remote engineers through code reviews and technical planning to keep complex features aligned with maintainable standards.

Backend Engineer at ThoughtWorks

December 1, 2017 - July 1, 2019

Engineered backend services for an enterprise modernization platform using Node.js, REST APIs, and relational data patterns, supporting cleanup migrations from legacy workflows. Defined microservice communication patterns around API contracts, reducing coupling and improving long-term maintainability for client engineering teams. Built data access layers and migration routes for PostgreSQL-backed services to preserve data integrity during incremental modernization. Applied Docker-based service packaging and CI/CD practices to enable repeatable development, testing, and releases in hybrid consulting environments. Strengthened backend reliability through automated tests, code reviews, and production defect analysis. Introduced GraphQL and Redis patterns where appropriate for read-heavy workflows, improving frontend performance while keeping backend ownership clean.

Software Development Intern at Netguru

July 1, 2017 - November 1, 2017

Supported frontend and API testing, assisted engineering teams with frontend enhancements using JavaScript and React concepts, and contributed to client-facing web app delivery. Performed bug fixes and learned REST contracts, data-backed features, and best practices for Agile delivery. Created technical notes and small feature improvements, fostering professional habits around ownership and remote collaboration.