Bartosz is available for hire

Bartosz Ignaczewski

Verified Expert in Engineering

Back-end Developer

Location

Gdynia, Poland

Toptal Member Since

April 27, 2022

Bartosz是一名技术主管和软件架构师，在软件工程方面拥有近十年的经验, 主要为金融机构提供应用. 他强调系统开发的工程部分，以反映高可操作性, simplicity, and evolvability. 丰富的海外经历使巴托斯成为一名有效的沟通者, 支持清晰的架构决策和原则，以及指导和指导开发人员的能力.

Software Engineering Back-end Development Data Migration Cloud Architecture Serverless Distributed Systems Ruby on Rails (RoR)Ruby RSpec Agile Software Development Behavior-driven Development (BDD)MacOS RubyMine JSON Git Remote

Portfolio

Advicefront

亚马逊网络服务(AWS)、软件架构、Ruby on Rails (RoR)...

sum.cumo Sapiens GmbH

Ruby on Rails (RoR)， Ruby, PostgreSQL, Sidekiq, GraphQL, API集成...

BuyBay

Ruby, Ruby on Rails (RoR)， API集成，Redis，远程工作...

Experience

Ruby on Rails (RoR) - 9 years Back-end Development - 9 years Software Architecture - 7 years Technical Leadership - 6 years Kubernetes - 5 years Majestic Monolith - 5 years Amazon Web Services (AWS) - 3 years Google Cloud Platform (GCP) - 1 year

Availability

Part-time

Preferred Environment

MacOS, RubyMine, Software Engineering, Ruby on Rails (RoR), Ruby, Git, Amazon Web Services (AWS), Kubernetes, Google Cloud Platform (GCP), Infrastructure as Code (IaC)

The most amazing...

...我执行的任务是在领域驱动的设计方法中进行遗留的单体模块化，作为微服务的垫脚石.

Work Experience

Tech Lead | Software Architect

2022 - PRESENT

Advicefront

在领域驱动设计中执行遗留的单体模块化，作为微服务的垫脚石. 从编写带有论证和概念证明的文档开始，以完整的实现和开发人员培训结束.
提供AWS解决方案、无服务器应用程序和基础架构代码，以处理在扩展环境中跨不同技术栈和用户通过EventBus和Cognito进行身份验证的通信.
Coached and mentored developers, gave tech talks, and recorded screencasts and training sessions, 引入专注于使代码更简单的软件和体系结构模式, operable, and evolvable.
参与设计技术系统路线图和战略技术方案.
提供了架构决策记录和广泛的Confluence和代码文档, outlining how the project evolved historically, its current state, and the plan for the future.
通过重构和重写技术债务控制，提高了项目的健康性，并在核心系统中提高了20%以上的行为驱动开发测试覆盖率.
docker化的应用程序基于一个带有相关服务的单线程.

Technologies: 亚马逊网络服务(AWS)、软件架构、Ruby on Rails (RoR), Software Engineering, Databases, Data Analysis, Ruby, PostgreSQL, Sidekiq, API Integration, Kubernetes, Git, RSpec, Data Migration, Scrum, Kanban, Redis, Remote Work, Rails Engines, Background Jobs, Jira, Agile Software Development, Behavior-driven Development (BDD), Back-end Development, MacOS, RubyMine, Object-oriented Programming (OOP), SQL, JSON, APIs, Legacy Code, Solution Architecture, Serverless, Serverless Architecture, DevOps, Distributed Systems, Cloud, Orchestration, Majestic Monolith, Technical Leadership, Cloud Architecture, System Architecture Design, Architecture, Docker, Python 3, Infrastructure as Code (IaC), Technical Architecture, Leadership, Documentation, Microservices, Python, Microservices Architecture, MinIO, Lambda Functions, Amazon Aurora, AWS Cloud Architecture, AWS Certified Solution Architect, SecOps, User Authentication, Security, Domain-driven Design (DDD), NoSQL, Software Design, Event Sourcing, JavaScript, System Architecture

Senior Software Engineer

2017 - 2021

sum.cumo Sapiens GmbH

Designed, developed, tested, deployed, 并维护了数字保险行业的Ruby on Rails引擎和后端应用程序, especially digital car insurance.
作为任务组的一部分，启动新项目，快速构建基于Ruby on Rails引擎的新客户端应用程序原型.
在客户账户财务中为新员工和承包商上岗, customer contracts changes, car damages, and other modules, 不管他们之前在项目中所选专业领域的经验水平如何.
Created extensive documentation and recorded live, 深入的教育会议，同时通过代码库和功能.
分析和迁移具有数百万条记录的实时系统上的数据.

Technologies: Ruby on Rails (RoR)， Ruby, PostgreSQL, Sidekiq, GraphQL, API集成, Kubernetes, RabbitMQ, Git, GitLab, GitLab CI/CD, RSpec, Data Analysis, Data Migration, Scrum, Kanban, Prometheus, Redis, Rails Engines, Remote Work, Databases, Software Engineering, Background Jobs, Jira, Agile Software Development, MacOS, Back-end Development, Behavior-driven Development (BDD), RubyMine, Object-oriented Programming (OOP), SQL, JSON, Legacy Code, APIs, DevOps, Orchestration, Majestic Monolith, Technical Leadership, Software Architecture, Cloud Architecture, System Architecture Design, Architecture, Amazon Web Services (AWS), Docker, Technical Architecture, Leadership, Documentation, Microservices, Microservices Architecture, User Authentication, Security, NoSQL, Software Design, JavaScript, System Architecture

Software Engineer

2015 - 2016

BuyBay

Designed, developed, 并测试了一个Ruby on Rails电子商务API集成商，该集成商通过亚马逊等不同的API在多个国家转售许多二手产品, Bol.com, and Allegro.pl.
使用带缓存的JSON:API规范构建内部API解决方案, blocking, throttling, authenticating, and schema modeling.
在创业环境中与CTO紧密合作.

Technologies: Ruby, Ruby on Rails (RoR)， API集成，Redis，远程工作, Software Engineering, Databases, MySQL, Git, GitLab, GitLab CI/CD, RSpec, Kanban, Sidekiq, Background Jobs, Jira, Agile Software Development, MacOS, Back-end Development, Behavior-driven Development (BDD), RubyMine, Object-oriented Programming (OOP), SQL, JSON, APIs, Third-party APIs, eCommerce, Data Migration, Scrum, Software Architecture, Technical Leadership, System Architecture Design, Architecture, Technical Architecture, Documentation, User Authentication, Security, NoSQL, Software Design, System Architecture

Software Engineer

2014 - 2014

eEngine Sp. z o.o.

为外部客户端开发和测试了两个电子商务Ruby on Rails应用程序.
开发并测试了一个内部的Android应用程序，以帮助公司进入一个新的市场.
在成功部署后维护和改进应用程序.

Technologies: Ruby, Ruby on Rails (RoR), Software Engineering, Databases, PostgreSQL, Git, RSpec, Scrum, Agile Software Development, MacOS, RubyMine, Object-oriented Programming (OOP), SQL, JSON, eCommerce, Behavior-driven Development (BDD), Back-end Development, Java, Android SDK, Documentation, User Authentication, Security, NoSQL, Software Design, JavaScript, System Architecture, Mobile Apps

Experience

Advicefront | Financial Advice App

http://advicefront.com/onboard/

A Ruby on Rails application for financial advisors. 我是技术主管和软件架构师，用领域驱动的设计方法处理遗留的单体模块化. 我提供跨不同技术栈的战略技术计划, documentation, and design and hands-on implementation. 我的任务还包括控制技术债务和审查代码的健康性. In addition, I provided training for other software engineers, engaged in DevOps tasks, and developed AWS solutions.

Digital Insurance System | SCIP Core

http://www.sumcumo.com/en/products

一个用于数字保险业务的Ruby on Rails引擎应用程序.

我是一名高级后端开发人员，主要负责客户账户财务的自动化, car damages, and customer contract changes. On top of the Ruby on Rails engine, 我开发了满足特定客户需求的修改层. 这个过程是在与客户的开发人员和领域专家的协作下完成的.

BuyBay | B2C Product Reselling App

http://www.buybay.com/en/

一个Ruby on Rails应用程序，专注于允许在在线拍卖系统中发布使用过的产品. 我是一个后端开发人员，专注于集成允许通过亚马逊在线上传产品报价的应用程序, Allegro, and BOL.com—and providing an in-house API design, implementation, and maintenance, including its security features or caching.

Skills

Languages

Ruby, GraphQL, SQL, Java, Python 3, Python, JavaScript

Frameworks

Ruby on Rails (RoR), Android SDK

Libraries/APIs

Sidekiq, Rails Engines, JSONAPI::Resources

Tools

Git, RSpec, RubyMine, Terraform, GitLab, Jira, RabbitMQ, GitLab CI/CD, Helm

Paradigms

Scrum, Kanban, Agile Software Development, Behavior-driven Development (BDD), Object-oriented Programming (OOP), Serverless Architecture, Majestic Monolith, Microservices, Microservices Architecture, DevOps, Event Sourcing

Platforms

Kubernetes, MacOS，亚马逊网络服务(AWS)，谷歌云平台(GCP)， Docker

Storage

PostgreSQL, JSON, Amazon Aurora, NoSQL，数据库，Redis, MySQL

Other

Software Engineering, Data Migration, Remote Work, Background Jobs, Back-end Development, Legacy Code, Solution Architecture, Serverless, Distributed Systems, Cloud, Orchestration, Technical Leadership, Software Architecture, Cloud Architecture, System Architecture Design, Architecture, Infrastructure as Code (IaC), Technical Architecture, Documentation, Lambda Functions, AWS Cloud Architecture, AWS Certified Solution Architect, Domain-driven Design (DDD), Software Design, System Architecture, Data Analysis, API Integration, APIs, Third-party APIs, eCommerce, ISO 27001, Leadership, SecOps, User Authentication, Security, Prometheus, MinIO, Mobile Apps

Education

2016 - 2017

Master's Degree in Computer Science

Lodz University of Technology - Lodz, Poland

2016 - 2017

计算机科学硕士学位(交换项目)

Universidad Complutense de Madrid - Madrid, Spain

2015 - 2016

计算机科学学士学位(交换项目)

埃因霍温理工大学-埃因霍温，荷兰

2012 - 2016

Bachelor's Degree in Computer Science

Lodz University of Technology - Lodz, Poland

Certifications

JANUARY 2023 - JANUARY 2026

Certified Kubernetes Administrator

The Linux Foundation

OCTOBER 2022 - OCTOBER 2024

Google Cloud Certified Professional Cloud Architect

Google Cloud

OCTOBER 2022 - OCTOBER 2024

HashiCorp Certified: Terraform Associate

HashiCorp

SEPTEMBER 2022 - SEPTEMBER 2025

AWS Certified Solutions Architect - Associate

Amazon Web Services

AUGUST 2022 - AUGUST 2025

AWS Certified Developer – Associate

Amazon Web Services

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