PROGRAMMER / DEVOPS

Jarosław
Krefta

I"m a PROGRAMMER / DEVOPS based in Gdynia and enjoy playing with technologies. I love travelling, bushcraft & tabletop rpg, mixology.

  • From Poland
  • Experience 10+ Years
  • Born in Gdynia

About Me

30+
Completed
Projects
8
Happy
Companies

My name is Jarosław Krefta. I have been working in field for over a decade on various positions.

As an experienced software developer, I possess a profound knowledge in designing, implementing, and testing software solutions. I specialize in creating efficient, scalable, and secure applications that meet user requirements and contribute to the organization's success. My analytical skills paired with creativity allow me to approach challenges innovatively, while my experience in teamwork ensures smooth collaboration with other professionals to achieve project objectives.

I`m also fun and warm person to be around and work with.

Contact Me

My Resume

My main expertise is software engineering, where I have successfully developed and deployed many projects. What sets me apart is my problem-solving ability, creativity, and ability to learn quickly. I am committed to continuous learning and staying abreast with the latest technological advancements, ensuring that my contributions are not only effective but also innovative.

SKILLS
C#
90%
F#
60%
.NET
90%
JavaScript
80%
Go
60%
Rust
60%
Powershell
80%
Linux
70%
Kubernetes
80%
Docker
80%
Cloud
70%
CI/CD
90%
Git-ops
90%
SQL
70%
NOSQL
70%
SERVICES
Web Development

Developing modern web applications using Valinla JS, Angular, React or Riot.

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App Development

Developing modern applications using .Net, Go or Rust.

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Game Development

Developing memorable and unique games using Unity game engine.

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Devops

Developing infrastructure using modern cloud (Azure, Vultr).

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System Architecture

Developing architecture and communication for complex systems using clean architecture principles.

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Contenerisation

Contenerising applications using Docker and Kubernetes

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Mentoring

Developing soft and technical skills in work colegues.

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Leadership

Leading development team to successfully deliver product.

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EDUCATION
2008 - 2013
Engineer
Maritime University in Gdynia

Electrical Engineering, Automation & Computer Controll Systems

TRAININGS
2020
Structogram® 1

Key to know thyself

2020
Structogram® 2

Key to know other people

2020
Structogram® 4

Key to lead and team building

EXPERIENCE
jan 2022 - now
Volue
Senior Software Developer
Responsibilites:
  • Learning domain
  • Design, development and maintenance of software
  • Design, development and maintenance of infrastructure
  • Contenerisation of software
  • Setup and maintenance of continuous build, integration and deployment pipelines
  • Performing software releases
  • Developing and sharing knowledge
jun 2021 - dec 2021
Axiom Cloud
Software Developer/Consultant
Responsibilites:
  • Design, development and maintenance of software
  • Design, development and maintenance of infrastructure
oct 2020 - jun 2021
Hitachi ABB
Senior .Net/Rust Developer
Responsibilites:
  • Design, development and maintenance of software
  • Design, development and maintenance of infrastructure
  • Leading team of developers, devops, testers and architects
oct 2019 - sep 2020
Major financial institiution
Gateway developer
Responsibilites:
  • Learning domain
  • Design, development and maintenance of software
  • Design, development and maintenance of infrastructure
  • Setup and maintenance of continuous build, integration and deployment pipelines
  • Enabling process of team supervision with use of psycholog
  • Performing software releases
  • Developing and sharing knowledge
may 2019 - sep 2019
Refinitiv
Gateway developer
Responsibilites:
  • Learn current infrastructure
  • Migrate current gateways to new sollution
sep 2018 - apr 2019
Savelend Sweden AB
Full Stack Developer / DevOps / Release Master
Responsibilites:
  • Learning domain
  • Design, development and maintenance of software
  • Design, development and maintenance of infrastructure
  • Setup and maintenance of continuous build, integration and deployment pipelines
  • Enabling process of software testing and release cycle
  • Performing software releases
  • Developing and sharing knowledge
sep 2017 - aug 2018
Jetshop
Senior .Net Developer
Responsibilites:
  • Design, development and maintenance of software
  • Learning domain
  • Developing and sharing knowledge
  • Taking role of release master (one week every two months)
jun 2015 - aug 2017
Powel AS
Software Engineer / DevOps
Responsibilites:
  • Learning domain
  • Design, development and maintenance of software
  • Setup and maintenance of continuous build, integration and deployment pipelines
dec 2014 - oct 2016
Powel AS
Domain Administrator
Responsibilites:
  • Administration and maintenance of server infrastructure in gdańsk branch
  • Acquisition, management and maintenance of it equipment in gdańsk branch
may 2014 - may 2015
Powel AS
Junior Software Engineer
Responsibilites:
  • Learning of selected technologies
  • Development and maintenance of software
  • Setup and maintenance of continuous build, integration and deployment pipelines.
2013
Business Software Solutions
Junior Developer

Pika - Worked in team building server application that mimics Dropbox behavior for company internal use.

Sales in Cracow - Application that served as a guide on Cracow expo (my part was setting up cloud based servers to intercept heavy traffic generated by smartphones and tablets).

ExMoney - Web currency exchange portal (I wrote integration with bank web services using Python and C#).

Jeeni.net - Mass marketing application using email and social media (I wrote additional social media integrations).