Oleg Abrazhaev - Staff Software Engineer

Q: Where is Oleg based?

Oleg is based in Berlin, Germany .

Q: What languages does Oleg speak?

Oleg speaks the following languages: Russian (Native), English (Advanced), Ukrainian (Advanced), German (Intermediate) .

Q: How many years of experience does Oleg have?

Oleg has at least 14 years of experience. During this time, Oleg has worked in at least 16 different roles and for 16 different companies . The average length of individual experience is 1 year and 9 months . Note that Oleg may not have shared all experience and actually has more experience.

Q: What is Oleg's latest experience?

Oleg's most recent position is Staff Software Engineer at Kpler Germany GmbH .

Q: What companies has Oleg worked for in recent years?

In recent years, Oleg has worked for Kpler Germany GmbH , sdev , Oliver Schrott Kommunikation GmbH , Hold My Code GmbH , and OSK Berlin .

Q: Which industries is Oleg most experienced in?

Oleg is most experienced in industries like Information Technology , Retail , and Media and Entertainment . Oleg also has some experience in Real Estate , Education , and Tourism .

Q: Which business areas is Oleg most experienced in?

Oleg is most experienced in business areas like Information Technology , Product Development , and Project Management . Oleg also has some experience in Research and Development .

Q: Which industries has Oleg worked in recently?

Oleg has recently worked in industries like Information Technology , Media and Entertainment , and Real Estate .

Q: Which business areas has Oleg worked in recently?

Oleg has recently worked in business areas like Information Technology , Product Development , and Project Management .

Recommended expert

Berlin, Germany

Check rate

Experience

Aug 2024 - Present

1 year 9 months

Berlin, Germany

Staff Software Engineer

Kpler Germany GmbH

Delivered a new notifications platform implementation built from scratch to replace existing and upcoming services
Collaborating with other teams to integrate more domains

Tech stack:

Data: Scala 3, Apache Kafka, Python, Airflow, Astronomer
BE-FE: TypeScript, NestJS, Java, Spring Boot, Vue
Dev-ops: AWS, PostgreSQL, Docker, GitHub Actions, Kubernetes, Helm, ArgoCD

Mar 2024 - Jul 2024

5 months

Vienna, Austria

Lead Full-Stack Software Engineer

sdev

Worked on a customer AI project under NDA

Tech stack:

BE: TypeScript, Node, NestJS, Express, PostgreSQL, OpenAI API, Docker
FE: TypeScript, Vue.js 3, Composition API, Vuetify 3, Angular, Angular Material, SCSS, TailwindCSS

Jul 2023 - Feb 2024

8 months

Berlin, Germany

Interim CTO (Tech Lead and Full Stack Software Engineer)

Oliver Schrott Kommunikation GmbH

Delivered the internal AI chatbot builder platform and released it to the company website

Tech stack:

BE: Node, Express, TypeScript, PostgreSQL, pgvector, OpenAI API, Docker
FE: Vue.js 3, Composition API, TypeScript, Vuetify 3, SCSS
Built a topic reach analytics dashboard

Tech stack:

TypeScript, Angular, Angular Material, Chart.js, NestJS, TypeORM, PostgreSQL, Docker
Updated and extended an internal company tool used daily by about 200 employees: Angular v11 to v16 update, design update, TypeScript, Angular Material, TailwindCSS
Conducted LLM research using prompt engineering and fine-tuning on OpenAI and LLM models (LLaMA 2, Mistral)
Researched fine-tuning techniques with transformers, QLoRA, quantization
Python 3, Jupyter notebooks

Mar 2023 - Jul 2023

5 months

Berlin, Germany

Senior Front-end Developer

Hold My Code GmbH

Delivered front-end for a workplace management system for Keßler Real Estate Solutions GmbH via GROSSWEBER Groß, Weber & Partner team

Tech stack:

Vue.js 3, Composition API, TypeScript, PrimeVue, Keycloak, SignalR, Pact JS, Jest, SCSS, Docker

Mar 2023 - Jun 2023

4 months

Berlin, Germany

Senior Full Stack Engineer

OSK Berlin

Built the AI platform project and AI chatbot generator to answer customers' questions using company data

Tech stack:

BE: Node, Express, TypeScript, PostgreSQL, pgvector, OpenAI API, Docker
FE: Vue.js 3, Composition API, TypeScript, Vuetify 3, SCSS

Dec 2021 - Feb 2022

3 months

Berlin, Germany

Engineering Manager

Ottofeller

Helped the team migrate from AWS Fargate and Hasura GraphQL gateway to AWS AppSync and AWS Lambda for a large US crypto start-up, Worldcoin
Hands-on coding: TypeScript, Node.js, GraphQL, Hasura, Next.js

Infrastructure as code:

AWS (AppSync, CDK, CloudFormation, Fargate, DynamoDB, ECS), GitHub Actions

Dec 2020 - Dec 2022

2 years 1 month

Berlin, Germany

Remote

Head of Engineering

Lumiform

Hands-on role (50–70%) as a full-stack engineer
Managed a fully remote dev team across multiple time zones and grew the team from 3 to 10 engineers
Hired new software engineers; conducted roadmap and sprint planning with PM; ran Scrum sprints
Planned technological and people resources; made technical decisions; conducted code reviews
Improved tech infrastructure with DevOps; set codebase and dev process standards; set up CI/CD infrastructure
Planned project and infrastructure architecture; directed implementation
Conducted quarterly feedback meetings and one-on-one support; delegated tasks to develop team skills; mentored engineers
Stayed on top of tech trends; delivered features and infrastructure with high code quality

Tech stack:

Hands-on coding: TypeScript, JavaScript, PHP, Bash, SQL, SCSS
FE: TypeScript, Vue (Composition API), Vuex, functional programming with fp-ts, io-ts
BE: Laravel 7+, MySQL 8, Node 12+ with TypeScript, Express
Testing: PHPUnit, Jest, Cypress
Infrastructure: Docker, AWS (EC2, Fargate, ECR, ECS, RDS, DynamoDB), Laravel Forge, Jenkins
Monitoring: NewRelic, Sentry, DataDog

Aug 2020 - Dec 2020

5 months

Berlin, Germany

Senior Front-end Developer

Lumiform

Finished developing the new front-end application and successfully integrated it into the existing tech infrastructure
Fixed numerous bugs and implemented FE, BE, and infrastructure improvements

Tech stack:

TypeScript, JavaScript, Vue (Composition API), functional programming with fp-ts

May 2020 - Jul 2020

3 months

Berlin, Germany

Front-end Team Lead

AUTO1 Group

Helped the team reach their work goals; communicated with other departments
Gathered requirements and prepared specifications; worked closely with PM and engineers

Tech stack:

React, Node, vanilla JavaScript, LESS

Dec 2019 - Feb 2020

3 months

Berlin, Germany

Web Developer

wuxian-berlin.de

Used Nuxt to create SPA with modern JavaScript
Implemented Bulma CSS framework and SCSS
Worked with Google YouTube API, Node.js, Express; hosted on Linux server with PM2

Jul 2019 - May 2020

11 months

Berlin, Germany

Front-end Tech Lead

Customer Alliance

Integrated into the dev process; introduced JavaScript testing (unit with Jest, e2e with Jest and Puppeteer); migrated e2e solution to Cypress integrated with Jenkins CI
Integrated TypeScript with Vue.js into the tech stack; set up infrastructure and TS workflow
Developed new functionality; updated infrastructure; supported team members; assisted in interviewing front-end developers

Dec 2017 - Jul 2019

1 year 8 months

Berlin, Germany

Senior Software Engineer

Customer Alliance

Implemented new product features; improved existing functionality and infrastructure; provided code reviews
Collaborated with PM, QA, and team members to meet deadlines

Tech stack:

JS: Webpack, ES6, Vue.js 2.5+, Highcharts, jQuery, underscore
Markup: SCSS, Twig, BEM, Handlebars
PHP: PHP 7.1+, Symfony 3+, Doctrine 2+
Scala: 2.11.8+, Play Framework
MySQL, Docker, RabbitMQ

Mar 2017 - Nov 2017

9 months

Bochum, Germany

Senior PHP Developer

Smart-Q

Developed projects using Zend Framework 3 and Symfony 3
Used DDD and hexagonal architecture approaches to design architecture (SOLID, clean code)
Developed front-end using Bootstrap, JavaScript, jQuery, jQuery UI, and a bit of Vue for the admin back-end
Collaborated with front-end and mobile developers
Worked with MySQL; project deployment and environment configurations on Linux servers
Maintained an open-source GitHub repository for a mobile push notification library (1,000+ stars)

Jan 2016 - Jan 2019

3 years 1 month

Berlin, Germany

Remote

Software Developer/Project Manager/Team Lead

bemaster.market

Led a remote team of 3–5 developers in an e-commerce startup; conducted interviews; managed communication via Skype and tasks via Trello
Started technical part of project, then delegated tech lead role and continued as PM/consultant
Helped project reach production release working in free time and weekends

Tech stack:

Back-end: Java Spring Framework, PostgreSQL, Docker
Front-end: Angular, React, SCSS, Bootstrap

Oct 2015 - Jan 2016

4 months

Krasnoyarsk, Russian Federation

Software Developer

Travelata

Participated in internal TOM project development as part-time back-end developer for travelata.ru
Developed new functionality per specifications

Tech stack:

Zend Framework 2, Doctrine 2, PostgreSQL, Redis, RabbitMQ, event bus, DDD, port adapter

Aug 2015 - Dec 2015

5 months

Krasnoyarsk, Russian Federation

Freelance Web Developer

vivalavoice.ru

Developed vivalavoice.ru website for Vocal School business
Implemented PHP, Zend Framework 2, Doctrine 2, Bootstrap, jQuery, MySQL

Jul 2015 - Jan 2017

1 year 7 months

Krasnoyarsk, Russian Federation

Senior PHP Developer

Panel100

Developed two projects with Zend Framework 2 and Doctrine 2 using DDD methodology and hexagonal architecture
Used MySQL, PostgreSQL, Memcached, Redis, Gearman, RabbitMQ, MongoDB
Configured deployment with Jenkins on Linux server
Used GitHub vendors for faster task completion; used Mercurial and Bitbucket for VCS; collaborated via Basecamp and Slack

Jun 2012 - Jul 2015

3 years 2 months

Krasnoyarsk, Russian Federation

Senior PHP Developer/Team Lead

RAZLET.RU LTD

Improved and added new functionality; supported existing projects; fixed bugs
Conducted technical interviews; developed a new back-end system with Memcached and multithreading using OOP, UML, PHP Kohana framework
Refactored code and contributed to other company projects as developer or project manager
Integrated new technologies (git, frameworks, Redmine); developed a JavaScript/jQuery interface for theatre tickets system
Developed internal document system with Zend Framework 2 and Doctrine 2; built general usage APIs with Zend Framework 2 and Apigility
Participated in internal accounting system development; handled server configuration, system administration tasks, optimization, scaling
Re-implemented a big project from Kohana to Zend Framework 2 with architecture improvements

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Retail, Media and Entertainment, Real Estate, Tourism, and Education.

Information Technology

Retail

Media and Entertainment

Real Estate

Tourism

Education

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Project Management, and Research and Development.

Information Technology

Product Development

Project Management

Research and Development

Summary

I am a highly skilled Senior Software Engineer with over 14 years of experience in software development. I specialize in building complex systems from scratch and designing clear and flexible architectures using modern tech stacks. I prefer TypeScript and frameworks like Vue, React, and Angular for the front-end. On the back-end, I adhere to SOLID principles, clean architecture, and occasionally microservices. I maintain high standards for code quality, utilizing modern OOP or functional programming techniques. I am always eager to expand my experience and adopt new programming languages or paradigms.

I excel in strategic technical leadership roles with hands-on coding, including positions such as Tech Lead, Lead Engineer, and Staff Engineer. I can act as the Head of Engineering or CTO in a startup, managing a team as the company grows while staying deeply involved in technology. I successfully led teams as a tech manager, balancing approximately 70% hands-on coding with leadership duties, in roles such as Team Lead and Engineering Manager.

Skills

Front-end: Javascript, Typescript, Vue, Angular, React, Mfe
Back-end: Node.js, Express, Nestjs, Scala, Java, Php, Symfony, Laravel
Databases: Postgresql, Mysql, Dynamodb, Mongodb
Devops: Ci/cd, Aws Cloud, Bash, Docker
Leadership: Extensive Experience In Leading Dev Teams Both In-office (Up To 5) And Remotely (Up To 10), With A Preference For Remote Work.
Ai Integrations: Chatbots, Vector Databases, Openai Apis, Self-hosted Llms, Fine-tuning.
Software Development, Full-stack Development, Software Architecture, Front-end Development, Back-end Development, Technical Leadership, Team Management
Databases, Oop, Functional Programming, Continuous Integration, Aws Cloud, Docker, Ci/cd
Project Management, Agile Methodologies

Languages

Russian

Native

English

Advanced

Ukrainian

Advanced

German

Intermediate

Education

Oct 2005 - Jun 2010

I.I. Mechnikov National Odesa University

Bachelor's and Specialist diploma, computer systems and networks · Computer Science · Odesa, Ukraine

Statistics

Experience

Total positions 18

Experience in Information Technology 12.5 y

Avg length 1 y

Longest experience 3 y 1 m

Global Experience

Countries worked in 3 (Germany, Russian Federation, Austria)

Primary country Germany

Expertise

Recent roles Staff Software Engineer, Lead Full-Stack Software Engineer, Interim CTO (Tech Lead and Full Stack Software Engineer)

Main industries Information Technology, Retail, Media and Entertainment

Main business areas Information Technology, Product Development, Project Management

Qualifications

Highest degree Bachelor

Profile

Created

April 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Oleg based?

Oleg is based in Berlin, Germany.

What languages does Oleg speak?

Oleg speaks the following languages: Russian (Native), English (Advanced), Ukrainian (Advanced), German (Intermediate).

How many years of experience does Oleg have?

Oleg has at least 14 years of experience. During this time, Oleg has worked in at least 16 different roles and for 16 different companies. The average length of individual experience is 1 year and 9 months. Note that Oleg may not have shared all experience and actually has more experience.

What roles would Oleg be best suited for?

Based on recent experience, Oleg would be well-suited for roles such as: Staff Software Engineer, Lead Full-Stack Software Engineer, Interim CTO (Tech Lead and Full Stack Software Engineer).

What is Oleg's latest experience?

Oleg's most recent position is Staff Software Engineer at Kpler Germany GmbH.

What companies has Oleg worked for in recent years?

In recent years, Oleg has worked for Kpler Germany GmbH, sdev, Oliver Schrott Kommunikation GmbH, Hold My Code GmbH, and OSK Berlin.

Which industries is Oleg most experienced in?

Oleg is most experienced in industries like Information Technology, Retail, and Media and Entertainment. Oleg also has some experience in Real Estate, Education, and Tourism.

Which business areas is Oleg most experienced in?

Oleg is most experienced in business areas like Information Technology, Product Development, and Project Management. Oleg also has some experience in Research and Development.

Which industries has Oleg worked in recently?

Oleg has recently worked in industries like Information Technology, Media and Entertainment, and Real Estate.

Which business areas has Oleg worked in recently?

Oleg has recently worked in business areas like Information Technology, Product Development, and Project Management.

What is Oleg's education?

Oleg holds a Bachelor in Computer Science from I.I. Mechnikov National Odesa University.

What is the availability of Oleg?

Oleg is immediately available for suitable projects.

What is the rate of Oleg?

Oleg's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.