Kozak Agency
Joined in
2023
We are a rapidly expanding software development company with almost 40 talented developers specializing in web development, mobile development, and cloud-based solutions.
Our firm expertise encompasses a wide range of contemporary web and mobile development tools. The most frequently demanding and widely used out of a list of our tech instruments are JavaScript and its modern frameworks, Node.js-based tools and frameworks, relational and non-relational databases, cloud computing platforms, mobile development languages and frameworks.
As the company thriving to meet the most distinctive client necessities we are extremely flexible in terms of development and provide a broad spectrum of development services onwards from turn-key basis solutions to uniquely tailored client requests.
Nowadays, in the comprehensive range of numerous industry fields, we have been attempting to diversify our portfolio with previously unexplored realms of activity.
The list of fields we already possess rock-solid expertise includes finance, education, healthcare, marketplaces, social networks, legal services, real estate, logistics and transportation, energy and utilities, blockchain, and others.
Throughout a period of our decently long journey, we as the company successfully developed and launched over 100 web products and brought unforgettable experience to plenty of end users.
The geography of customers embraces a significant part of the world globe: US, UK, Israel, EU, Australia, Canada are amongst the most common ones.
Kozak Agency company this is a friendly environment for professionals and also a great web development community.
There is a cozy space where we can arrange our meetings and team buildings.
We believe that a high level of communication is an important part of people's success and strong partnerships.
Looking forward to hearing from your CV!
Join our team and become a new part of our community.
Our firm expertise encompasses a wide range of contemporary web and mobile development tools. The most frequently demanding and widely used out of a list of our tech instruments are JavaScript and its modern frameworks, Node.js-based tools and frameworks, relational and non-relational databases, cloud computing platforms, mobile development languages and frameworks.
As the company thriving to meet the most distinctive client necessities we are extremely flexible in terms of development and provide a broad spectrum of development services onwards from turn-key basis solutions to uniquely tailored client requests.
Nowadays, in the comprehensive range of numerous industry fields, we have been attempting to diversify our portfolio with previously unexplored realms of activity.
The list of fields we already possess rock-solid expertise includes finance, education, healthcare, marketplaces, social networks, legal services, real estate, logistics and transportation, energy and utilities, blockchain, and others.
Throughout a period of our decently long journey, we as the company successfully developed and launched over 100 web products and brought unforgettable experience to plenty of end users.
The geography of customers embraces a significant part of the world globe: US, UK, Israel, EU, Australia, Canada are amongst the most common ones.
Kozak Agency company this is a friendly environment for professionals and also a great web development community.
There is a cozy space where we can arrange our meetings and team buildings.
We believe that a high level of communication is an important part of people's success and strong partnerships.
Looking forward to hearing from your CV!
Join our team and become a new part of our community.
Website:
https://kozak-ag.com/
Senior Ruby+React developer/architect with a focus on the frontend
Kozak Agency
$$$
Full Remote
·
EU
·
5 years of experience
·
English - B2
·
SaaS
FTE: Full-time (40 h per week)
Timeline: 3-6 months (tbd)
Start: ASAP
English: B2
Recruitment process: a tech check with our client, then an interview with the main client
The company
A well-established B2D (business-to-developer) SaaS platform operating at significant scale. Their product is infrastructure-level - real-time connectivity used by developers worldwide.
The team
~6–7 people: tech lead, PM, delivery manager, 3 web engineers + contractors. Small, tight-knit, opinionated. Standups Monday and...
More
191 views
·
38 applications
·
7d
Blockchain developers
Kozak Agency
$$$
Full Remote
·
Countries of Europe or Ukraine
·
4 years of experience
·
English - B2
·
Blockchain / Crypto
Workload: full-time, remote
Start: asap
Duration: long-term
Location: any
English: B2
Technical requirements (general)
- 3+ years of production blockchain experience in BTC. Multi-protocol experience (strongly preferred).
- Java + Spring Boot + SQL
- Familiarity with test-driven development (TDD) and/or behaviour-driven development (BDD) as working practices, writing tests before or alongside implementation.
- Familiarity with Domain-Driven Design principles.
- Comfortable working in a monorepo structure...
More
158 views
·
26 applications
·
11d
Software Engineer React
Kozak Agency
$$$
Full Remote
·
EU
·
7 years of experience
·
English - B2
·
E-commerce / Marketplace
Location: Remote (EU candidates only)
About the Project
We are looking for an experienced Strong Middle / Senior Frontend Developer to join a high-traffic e-commerce project. The role focuses on building scalable, high-performance web applications with a strong emphasis on accessibility, performance, and user experience.
Must-have Skills
7+ years of commercial experience with React
Strong expertise in TypeScript
Hands-on experience with Next.js
Experience writing and maintaining automated tests
Good...
More
605 views
·
85 applications
·
12d
Senior (6+ years) Full-stack Developer (Back-end focused)
Kozak Agency
$$$
Full Remote
·
Poland
·
6 years of experience
·
English - B2
English B2+
A university degree in computer sciences.
Poland based candidates only.
Mandatory domain expertise in Finance and Insurance. Must understand financial logic and data integrity.
Requirements:
• 6+ years of experience in software development with a deep focus on Back-end architecture.
• Expertise in PostgreSQL and raw SQL: Experience working without ORMs, managing migration-driven schemas, and implementing immutable double-entry ledgers.
• Deep knowledge of Next.js 16 (App Router) and...
More
110 views
·
3 applications
·
14d
(Senior) Machine Learning Engineer, Robot Learning
Kozak Agency
$$$
Full Remote
·
Countries of Europe or Ukraine
·
5 years of experience
·
English - B2
It is revolutionizing how robots operate in factories — not through rigid programming or teaching by human demonstration, but with smart perception and AI intelligence. We are a team of 4 motivated people with +25 years of experience in industry and robotics. Our mission is to make robots smarter and more flexible, enabling batch-size-1 automation for surface treatment economically. Our technology helps factories in Europe to remain competitive with intelligent robotics.
We are now looking for a Senior...
More
28 views
·
4 applications
·
14d
Senior Laravel Engineer
Kozak Agency
$$$
Full Remote
·
Countries of Europe or Ukraine
·
5 years of experience
·
English - B2
About company/product/project: UK company, established & live
The Active Diagnostics Tools help social housing residents report repair issues quickly and accurately through an intuitive, guided experience.
Residents are taken through a structured series of filtering questions designed to identify the nature of their problem. Once completed, the system generates a diagnosis and sends the relevant information to the ESP integration layer, which handles the formal logging and processing of the repair.
All...
More
254 views
·
64 applications
·
14d
Senior AI-Native Full-Stack Developers
Kozak Agency
$$$
Full Remote
·
Countries of Europe or Ukraine
·
5 years of experience
·
English - B2
English requirement: Upper-Intermediate or higher
Developer Requirements
5+ years of commercial Full-Stack development experience
Strong expertise in React, Next.js, TypeScript, Node.js (or similar modern stack)
Experience building scalable web applications and APIs
Strong knowledge of PostgreSQL/MySQL and modern databases
Experience with cloud platforms, Docker, and CI/CD
Ability to work independently and integrate into an existing engineering team
Upper-Intermediate English or higher
Most...
More
209 views
·
90 applications
·
18d
Senior Java / Full-Stack Developer (Legacy Modernization Track)
Kozak Agency
$$$
Full Remote
·
Countries of Europe or Ukraine
·
5 years of experience
·
English - B2
Workload: Full-time
Start: ASAP
Duration: Long-term (3+ years)
Location: open
English: B2+
Key Requirements & Technical Stack
Core Task: Integration with a 30-year-old legacy healthcare system and rewriting legacy screens into modern UI.
Database & Legacy: Deep hands-on experience with Oracle ADF and PL/SQL.
Modern Backend: Java / Spring (thin service layer architecture).
Frontend: React (rewriting screens from scratch).
Role Focus: Technical leadership/execution on legacy decoupling, data integration,...
More
148 views
·
29 applications
·
19d
Senior (Tech lead) Java developer
Kozak Agency
$$$
Full Remote
·
EU
·
5 years of experience
·
English - B2
Workload: full-time
Start: asap
Duration: long-term (3 years)
Location: EU !!!
English: B2
We’re currently scoping a new project for one of our enterprise clients—a major global consulting firm (for whom we already manage several active maintenance and development streams across multiple entities).
We are looking to partner up to secure senior Java capacity for this account. Here are the key details of what we need:
Project Overview
• Scope: Maintenance and further development of large-scale, complex...
More
35 views
·
5 applications
·
21d
Kotlin Architect with German
Kozak Agency
$$$
Full Remote
·
EU
·
5 years of experience
·
English - B2
Start date: ASAP
Duration: Full-time
Duration of assignment: until the end of 2026 (extension possible)
Location: Hanover, 100% remote
Sector: Finance
Project language: German !!!!
Responsibilities:
Ongoing development of an app platform based on Kotlin Multiplatform.
Design and development of modern platform and UI components using Kotlin Multiplatform and Compose Multiplatform.
Technical consultancy, documentation and support for product teams building on the platform.
Development of innovative...
More
26 views
·
1 application
·
21d
Senior Power BI/MS Fabric Developer
Kozak Agency
$$$
Full Remote
·
Countries of Europe or Ukraine
·
10 years of experience
·
English - B2
The Consultant will be responsible for designing, developing, and maintaining Power BI reporting and automation solutions to support business decision-making across the organization. This role will drive the company’s Power BI automation strategy, leveraging Microsoft Fabric, Power Platform tools, and Azure services to implement scalable, automated, and intelligent reporting solutions.
Key Responsibilities:
1. Power BI Development & Reporting Automation
Design, develop, and maintain interactive Power BI...
More
46 views
·
3 applications
·
21d
Senior DevOps / Platform Engineer with DevSecOps and Cloud Architecture focus in Germany
Kozak Agency
$$$
Full Remote
·
EU
·
5 years of experience
·
English - B2
Start: ASAP
Long-term project
Candidate location: EU !!!
Location: Berlin (Hybrid) or fully remote
Department: Technology / Digital Transformation
You'll own the infrastructure, automation, and delivery pipelines that power our internal platforms and integrations — working across cloud (Azure/GCP), containerized workloads, and enterprise systems (SAP, NestJS-based services, and internal tooling). This is a senior, hands-on role with real architectural ownership: you'll shape how we build, secure, and...
More
34 views
·
3 applications
·
21d
Senior n8n Automation Developer
Kozak Agency
$$$
Full Remote
·
Countries of Europe or Ukraine
·
5 years of experience
·
English - B2
Start: ASAP
Duration: 6+ months
Project Overview
We're looking for an expert-level n8n automation developer for a long-term engagement (6+ months) covering three parallel workstreams: infrastructure migration, social media automation expansion, and cold outreach pipeline development.
What You'll Do
1. Infrastructure Migration
Migrate existing n8n cloud workflows to self-hosted n8n on RepoCloud.io
Configure autoscaling for production workloads
2. Social Media Automation
Expand existing social media...
More
67 views
·
10 applications
·
7d
Lead Node.js Engineer
Kozak Agency
$$$
Full Remote
·
EU
·
10 years of experience
·
English - B2
In this role, you will lead the design and delivery of cloud-native integration solutions for enterprise manufacturing systems. You'll work closely with Product Owners, Solution Architects, Site IT teams, and distributed engineering teams to build scalable, secure, and high-quality backend services on AWS.
This is a hands-on technical leadership role where you'll contribute to architecture, mentor engineers, perform design and code reviews, and help shape the technical direction of the platform.
What...
More
28 views
·
0 applications
·
15d
AI-Native Full-Stack Builder
Kozak Agency
$$$
Full Remote
·
Countries of Europe or Ukraine
·
4 years of experience
·
English - B2
We're building an AI-native delivery team that ships working software in days, not quarters.
We're looking for a builder who uses AI coding tools as a default workflow—Claude Code, Cursor, Replit, v0, Lovable, Bolt, or similar—and can quickly turn ideas into working products, validate them with users, and iterate fast.
This is not a Staff Engineer role. Long-term architecture and production hardening are owned by the integration engineering team. Your focus is speed, experimentation, and delivering value...
More
255 views
·
94 applications
·
21d