Daniel Michalski

I am a Tech Lead,Senior Full-Stack Engineer

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Daniel Michalski

I am a Senior Full-Stack Engineer | Tech Lead and Master of Science in Engineering with 14+ years of professional experience in the Java ecosystem, specialising in microservices architecture and payment processing systems. Currently leading a squad of 12 on a large-scale Visa project at Cognizant.

Experienced in hands-on technical leadership - architecture design, code reviews, API specification and team mentoring across fintech and insurance domains. Pioneering agentic AI workflows (Claude Code, MCP, sub-agents) across engineering teams.

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Hobbies & Interests

I enjoy being physically active and spend a lot of time playing sports and team games.

Developing

Windsurfing

MTB XC

Martial arts

Snowboard

Gym

Games

Travel

1

Line of code

1

Cup of coffee

1

Project complete

1

Happy client

What Do I Offer?

I am experienced with all stages of the development cycle for dynamic web projects.

Complex applications

14+ years of commercial experience delivering large-scale, complex applications in fintech and insurance domains.

Technology stack

General broad familiarity with a variety of technologies covering the full application stack.

Backend languages

Expert-level knowledge of Java and Kotlin, with deep experience in Spring Boot, microservices architecture and Apache Kafka.

Frontend frameworks

Solid experience with Angular and React, including TypeScript, building responsive and performant web interfaces.

Development lifecycle

Experience with the development lifecycle and scrum or kanban task management process.

Technical Leadership

Proven ability to lead engineering teams, conduct technical interviews, mentor developers and drive architectural decisions.

Work Participation

I have been working on the design and development of a broad spectrum of projects.

Jan 2026 - Present

Squad Lead

Cognizant | European Payment Gateways (Visa)

Key responsibilities:

Lead a cross-functional squad of 12 on a high-volume payment processing platform for Visa
Oversee architecture and delivery of 20+ backend microservices in Java
Pioneer agentic AI workflows (Claude Code, MCP, sub-agents, VGraph) across the engineering teams
Support team growth through technical interviews
Drive technical roadmap, architectural decisions, and code quality across the platform

Technical and Team Lead

Cognizant | European Payment Gateways (Visa)

Key responsibilities:

Led a team of 4 Devs and 2 QAs while actively contributing as a developer on a Visa payment processing platform
Designed and developed backend microservices in Java/Spring Boot within a 20+ service architecture, integrated via Kafka
Introduced Claude Code with MCP to the team workflow, accelerating planning, development, and code review processes
Mentored developers, maintained high test coverage (JUnit, SonarQube, JaCoCo), and supported team growth through interviews

Oct 2023 - Dec 2025

Jan 2021 - Aug 2023

Senior Full-Stack Developer

Devbridge, a Cognizant company | Web platform for financial reporting and SEC filing

Key responsibilities:

Designed and developed 15+ backend microservices in Java and Node.js
Built and maintained React frontend for financial data visualisation
Designed API specifications and database schemas

Technical Lead

Marviq | Web and Mobile platform for frontline workers

Key responsibilities:

Led a team of 3 developers and 2 QAs on a mobile-first enterprise platform
Designed backend microservices in Java and a cross-platform mobile app in Ionic with Angular
Defined API specifications and database architecture

Sep 2019 - Dec 2020

Jul 2015 - Sep 2019

Senior Full-Stack Developer

Apreel | Insurance platforms - Aviva (UK), Warta (PL)

Key responsibilities:

Delivered 4 insurance platform projects across 2 clients: Aviva (UK) and Warta (PL)
Designed and developed backend services in Java/Spring/Hibernate and Kotlin/Spring; Angular frontends
Mentored junior developers and contributed to architectural decisions

Full-Stack Developer

Infovide-Matrix | Web platform SLS (Gothaer)

Key responsibilities:

Developed backend services in Java/EJB and Thymeleaf/Apache Struts frontends for Gothaer (SLS) and Polkomtel (EDI)

Dec 2014 - May 2015

Feb 2013 - Nov 2014

Java Software Developer

COMP CI | Self-service machine (Poczta Polska)

Key responsibilities:

Developed self-service machine software for Poczta Polska (Java backend, JavaFX frontend)

Java Software Developer

LuckyIT | Driver's licence exam preparation application

Key responsibilities:

Built a Java desktop application for driver's licence exam preparation (categories A, B, C)

Jun 2012 - Jan 2013

Work Expertise

Senior Full-Stack Engineer and Tech Lead specialising in Java ecosystem, microservices architecture and payment processing systems.

Java

90%

Kotlin

80%

Groovy

60%

Node.js

50%

Spring Boot

85%

Hibernate / JPA

80%

Docker / Kubernetes

75%

Apache Kafka

65%

Angular

75%

React

65%

TypeScript

70%

JavaScript

65%

Polish

100%

English

80%

Contact Me

If you have got any questions, feel free to contact me.

Phone

Company phone number

Email

Company email address

Location

Gdynia, Poland

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Daniel Michalski

I am a Tech Lead,Senior Full-Stack Engineer

Daniel Michalski

Hobbies & Interests

Developing

Windsurfing

MTB XC

Martial arts

Snowboard

Gym

Games

Travel

1

Line of code

1

Cup of coffee

1

Project complete

1

Happy client

What Do I Offer?

Complex applications

Technology stack

Backend languages

Frontend frameworks

Development lifecycle

Technical Leadership

Work Participation

Squad Lead

Technical and Team Lead

Senior Full-Stack Developer

Technical Lead

Senior Full-Stack Developer

Full-Stack Developer

Java Software Developer

Java Software Developer

Work Expertise

JVM Languages

Backend development

Frontend development

Language Skill

Java

Kotlin

Groovy

Node.js

Spring Boot

Hibernate / JPA

Docker / Kubernetes

Apache Kafka

Angular

React

TypeScript

JavaScript

Polish

English

Contact Me

Phone

Email

Location