Damian's Resume

+48 509-777-939

info@dskrzypiec.dev

dskrzypiec.dev

ssh -p 2222 cv.dskrzypiec.dev

Damian Skrzypiec

WORK EXPERIENCE

Software Engineer

Point72

Risk Technology

02.2023 - $current_date

Developing new distributed platform for computation and analytics for Risk team in Point72
- Developing and maintaining platform infrastructure based on Ray and AWS EKS
- Developing core Python library which is a gateway to the new platform
- Implementing Ray actors life cycle management
- Working on performance improvement of the platform
Introducing Apache Airflow as a new scheduler in Risk Tech using AWS MWAA
- Setup MWAA infrastructure via Terraform
- Setup integration with other internal systems - SQL Server and Ray cluster on AWS EKS
- Implement customized local setup of Airflow using Docker
- Implement ETL processes preparing data for the new platform, using Airflow DAGs
- Design the release process and CI/CD pipelines

Senior Data Engineer

TCL Research Europe

Cloud Team

08.2022 - 01.2023

Developing Overseas Big Data Platform for TCL
- Development and maintenance of data pipelines - Spark (Scala) with AWS Glue jobs
- Development and maintenance of AWS infrastructure (8 global regions) using AWS CDK with Typescript
Performing infrastructure code migration from AWS CDK v1 into AWS CDK v2
Maintenance of tracking platform which handles events in real-time using data mesh-like approach
Development of cross-clouds ETLs - AWS to AWS China and AWS to Alibaba Cloud (Aliyun)
Development of end-to-end tests for Spark (Scala) transformation
Development and maintenance of AWS Lambda in Python

Senior Backend Developer

Territory Read

Startup (part time)

01.2022 - 10.2022

Backend implementation of a web app in Go
- Implementation of user authentication and authorization
- Implementing login using OAuth2
Design and implementation of ETL process for integrating third-party database serialization
- Loading from AWS S3 into Go program inside AWS Lambda with asynchronous writes into AWS Aurora
Implementation of a search engine using combination of internal database and external HTTP API
Implementation of communication between backend and fronted using WebSocket protocol

Senior Data Engineer (C#)

Allegro Pay

DEA

08.2021 - 07.2022

Maintenance of the core analytical databases (Snowflake)
Design and implementation of data pipelines (Apache Airflow)
Design and implementation of the process for loan evaluation

Set up Google Composer infrastructure
Design data model schema
Implementation of Apache Airflow DAGs for the process
Design reporting and communication with other processes

Consult and review of C# services regarding data models and Snowflake
Implementation of analytical data model based on technical events using Snowflake and dbt
Integration all historical data on delivery addresses from Cassandra and MongoDB into Snowflake using Go

Senior Backend Developer (C#)

PwC

Data Tools

05.2020 - 07.2021

Maintenance and development of an IFRS 9 application for an international bank

Implementation of new features on the backend (C# and SQL Server)
Improvement of the key processes of the application
Development of end-to-end tests
Development of CI/CD processes (TeamCity and Octopus)

Implementation of .NET Core backend prototypes for web apps
Guiding and performing code reviews for junior devs

Senior Data Scientist

PwC

Financial Risk Management

10.2019 - 04.2020

Design and implementation of an application for credit risk models validation

Designing the application database schema (SQL Server)
Backend implementation (HTTP server in Go)
Communication with analytic layer (R) and the frontend (Angular)

Design and implementation of an IFRS 9 application for a factoring company

Managing a four-people team
Designing the database (SQLite)
Implementation of estimation, calculation and reporting layer

Design and implementation of tools (R) for building behavioral models in market risk
Internal workshops - Go language (8h)

Senior Consultant

PwC

Financial Risk Management

10.2017 - 09.2019

Designing and leading development of internal tools for modelling
Implementation of automation estimation of parameters for credit risk models
Implementation of calculation stress tests for expected credit loss

Designing the database schema (SQL Server)
High performance calculation engine in Go
Communication with analytical layer (R)

Testing (unit and end-to-end) monolith IFRS 9 (C#) application
Internal workshops - git (2h), R (20h) and an introduction to HTTP protocol (2h)

Consultant

PwC

Financial Risk Management

02.2015 - 09.2017

Building and implementing models for credit risk
Use machine learning to improve parts of credit risk models
Algorithms performance optimization (C# and T-SQL)
Data analysis, reporting and validations (R)

Intern & Junior Analyst

Orange

Business Intelligence

05.2014 - 01.2015

Developing a prototype of real-time application using geodata of clients (R, shiny)
Developing an "application" in VBA for periodical reports with data visualization and stats

EDUCATION

Mathematics

Warsaw University

2011 - 2017

Bachelor degree - probability theory (https://dskrzypiec.dev/fbm.pdf)
Masters degree - statistics (https://dskrzypiec.dev/struct-learning.pdf)

SKILLS

Advanced

Go, C#, Python, Vim, SQL Server, SQLite, Snowflake, Airflow

Intermediate

Scala, HTTP, *NIX tools, AWS CDK, AWS data stack (S3, Step Functions, Glue, EC2, Lambda)

Hobby

C++, F#, Machine Learning

CONFERENCES

WDI 2019

03.2019, Warsaw

Presentation "Functional programming in R" - github.com/DSkrzypiec/WDI2019FP

eRKa

03.2017, Cracov

Presentation "Reporting automation in R" - github.com/DSkrzypiec/ReportGenerator

OTHER

Certificates

AWS Certified Solutions Architect - Associate (7EV5SPJCSNF1Q8WT)