Tomasz

From Poland (UTC+2)

Back-end Web Developer|Senior

Full-stack Web Developer|Senior

Architect

Skills and seniority verified on Nov 12, 2026

Tomasz – AWS Lambda, React, AWS CloudFormation

Senior Python and cloud engineer working with Python, FastAPI, Node.js, TypeScript and React. Showed strong practical knowledge of AWS (Lambda, DynamoDB, SNS, SQS, S3, CloudFormation) and GCP, and a clean cloud-native approach to system design. Spent over ten years at one product company building microservices and data pipelines, and took machine learning models to production with a gradual rollout mechanism. Owns features end to end, from discovery and architecture to infrastructure as code, observability and incident response, and uses Claude Code in day-to-day development.

9 years of commercial experience

Main technologies

AWS Lambda

9.5 years

React

9.5 years

AWS CloudFormation

9.5 years

Node.js

9.5 years

SQL

9.5 years

DynamoDB

9.5 years

Typescript

9.5 years

Amazon S3

9.5 years

Python

9.5 years

Amazon SNS

9.5 years

JavaScript

9.5 years

GCP

9.5 years

Amazon SQS

9.5 years

AI-assisted coding

1 year

FastAPI

1 year

Claude Code

1 year

CloudWatch

1 year

Prometheus

1 year

Additional skills

.NET

Redshift

Apache Airflow

ElasticSearch

MongoDB

ETL

Angular

Docker

BigQuery

GWT

MySQL

Java

Big Data

AWS

Apache Hadoop

Active Directory

Network administration

GitHub Copilot

Direct hire

Possible

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Experience Highlights

Backend Engineer

Nov 2015 - Sep 202610 years 10 months

Project Overview

Fraud detection and compliance platform for an online review service. Built microservices and data pipelines for event processing at scale, and designed a gradual rollout mechanism for machine learning models.

Responsibilities:

Designed microservices and data pipelines by gathering business requirements, estimating timelines, and writing architectural RFCs.
Implemented and maintained microservices in .NET, Python, and Node.js.
Maintained services through observability, scalability improvements, debugging, and incident response.
Worked with polyglot persistence using MongoDB, DynamoDB, Elasticsearch, and Redshift/BigQuery.
Realized event-driven architecture via SNS and SQS.
Implemented ETL workflows via Airflow and Google Dataflow.
Implemented and maintained internal UIs for compliance staff using Angular and React.

Project Tech stack:

.NET

Python

Node.js

Typescript

MongoDB

DynamoDB

ElasticSearch

Redshift

BigQuery

Amazon SNS

Amazon SQS

Apache Airflow

Angular

React

ETL

AWS Lambda

Docker

JavaScript

SQL

GCP

AWS CloudFormation

Amazon S3

Software engineering industry mentor

Sep 2022 - Sep 20242 years

Project Overview

Online career courses with mentoring from industry experts. Mentored students on their programming projects and supported them in getting their first software engineering jobs.

Responsibilities:

Helped students break into their first job by supervising their programming projects.
Assisted students via weekly calls.

Project Tech stack:

Project management

Junior Software Developer

Oct 2014 - Oct 20151 year

Project Overview

Desktop and web-based data quality solutions. Worked on the Java backend and the web interface built with GWT.

Responsibilities:

Developed desktop and web-based data quality solutions.
Worked with Java, MySQL and GWT.

Project Tech stack:

Java

MySQL

GWT

Software Developer Intern

Sep 2013 - Aug 201411 months

Project Overview

Master's thesis project for a data quality software vendor. Extended a data cleaning application to support big data processing on distributed systems such as Hadoop and HBase.

Responsibilities:

Extended a data cleaning application to process big data on distributed systems such as Hadoop and HBase.
Delivered a proof of concept for the business partner.
Defended the master's thesis at the university.

Project Tech stack:

Java

Apache Hadoop

AWS

Big Data

IT Supporter

Jul 2013 - Feb 20147 months

Project Overview

IT department of a Danish biotechnology company. Provided first-line IT support and handled network and system administration tasks.

Responsibilities:

Provided first-line IT support for on-site and remote employees.
Managed hardware, software, and network administration tasks.

Project Tech stack:

Network administration

Active Directory

Internet application developer trainee

Jul 2011 - Sep 20112 months

Project Overview

Web application for translators. Built a module for managing configuration files as a trainee developer.

Responsibilities:

Built a module for managing configuration files in a web application for translators.
Worked on both the frontend and the backend with Java and JavaScript.

Project Tech stack:

Java

JavaScript

Keep in mind, the experience summary might exclude non-relevant projects

Languages

Polish

Advanced

Danish

Pre-intermediate

German

Pre-intermediate

English

Advanced

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