Kozak Agency

About the role:
We’re looking for a full-time, long-term engineer who feels equally at home in modern React front ends and back-end services written in C#.NET and classic PHP.

Key skills required:
- React
- Nextjs
- Typescript
- javascript
- .NET C#
- ASP.NET Core
- MSSQL
- mysql
- Postgres
- HTML
- CSS
- PHP
- GIT100 % remote from EU or Ukraine with overlap to CET business hours.
Stable, long-term contract
Transparent processes, lightweight Scrum, caring team culture.
English B2

We offer:

• Cooperation with a stable company with well-established processes and a positive atmosphere
• Experience in project management of different levels of complexity, methodology, and approaches
• Flexible schedule: Mon-Fri (8 hours a day)
• 18 days of paid vacation; 15 days sick leave
• A decent level of remuneration with regular reviews of the results of cooperation
• Extensive loyalty program 

ETL, which stands for Extract, Transform, Load, is a process used in data management to collect data from various sources, clean and organize it, and then load it into a data warehouse or other destination.

Project stack:
- Node.js + NestJS
- Prisma (ORM for PostgreSQL)
- Express Basic Auth, JWT
- class-validator / class-transformer
- Lodash, Dayjs, Pino (logger)
 -Docker-

Full-time/long-term
-Level - Senior
-English - B2+

Stack: React, Azure,.Net, Mongo
English: upper Intermediate
Duration: longterm
Start: ASAP


We offer:

• Cooperation with a stable company with well-established processes and a positive atmosphere
• Experience in project management of different levels of complexity, methodology, and approaches
• Flexible schedule: Mon-Fri (8 hours a day)
• 18 days of paid vacation; 15 days sick leave
• A decent level of remuneration with regular reviews of the results of cooperation
• Extensive loyalty program

Stack: Node.js, NestJS, PostgreSQL/MySQL, AWS/Azure
English: Intermediate+
Duration: ~2 months (MVP)
Start: ASAP

Project:
A modern platform where users can securely buy/sell their personal data with integrated payments, document handling (DocuSign, Dropbox), analytics (PowerBI), and flexible roles.

We offer:

• Cooperation with a stable company with well-established processes and a positive atmosphere
• Experience in project management of different levels of complexity, methodology, and approaches
• Flexible schedule: Mon-Fri (8 hours a day)
• 18 days of paid vacation; 15 days sick leave
• A decent level of remuneration with regular reviews of the results of cooperation
• Extensive loyalty program

Requirements:
- Solid hands-on experience with Python
- 3+ years for Middle, 5+ years for Senior level
- Ability to deliver quality code under tight timelines
- Strong problem-solving and debugging skills
- English: Upper Intermediate+

We offer:

• Cooperation with a stable company with well-established processes and a positive atmosphere
• Experience in project management of different levels of complexity, methodology, and approaches
• Flexible schedule: Mon-Fri (8 hours a day)
• 18 days of paid vacation; 15 days sick leave
• A decent level of remuneration with regular reviews of the results of cooperation
• Extensive loyalty program 
   

Fintech. European client.
English B2+

Must have - experience within contract management systems for leasing.
 ⁃ Strong experience with Java EE
 ⁃ Practical experience with EJB, JMS, CDI, REST/SOAP, Hibernate, Maven and Git
 ⁃ Experience with JBoss / Camunda
 ⁃ Very good knowledge of SQL and relational DB
 ⁃ Experience with microservice architectures and container technologies
 ⁃ Initiative and the ability to generate ideas/provide solutions, not just code
 ⁃ Very good soft skills


We offer:

• Cooperation with a stable company with well-established processes and a positive atmosphere
• Experience in project management of different levels of complexity, methodology, and approaches
• Flexible schedule: Mon-Fri (8 hours a day)
• 18 days of paid vacation; 15 days sick leave
• A decent level of remuneration with regular reviews of the results of cooperation
• Extensive loyalty program 

TechStack:
- React JS (Hooks-based, component-driven architecture)
- Material UI v7 (MUI) — advanced customization, theme extension, variant creation
- React Router v6 — route nesting, layout routing, param handling
- RTK Query — API fetching, normalization, caching
- TypeScript — strict typing culture
- Adobe Campaign Classic SDK — (used via backend APIs)

Must-Have Skills:
- 3+ years experience in React with TypeScript
- Deep understanding of MUI v7 theming and customization
- Creating custom components, styling variants, using `sx` and `styled`
- Extending palettes, typography, spacing, breakpoints, etc.
- Comfortable building large-scale apps with React Router v6
- Strong working knowledge of Redux Toolkit and RTK Query
- High attention to detail in UI implementation
- Git proficiency and experience in collaborative workflows

Responsibilities:
- Drive the rebuild of our frontend from the ground up using React and MUI v7
- Implement responsive, accessible, and pixel-perfect UIs from Figma specs
- Extend and customize the MUI theme to meet brand and UX needs (colors, variants, breakpoints, shadows, etc.)
- Create modular and reusable components following scalable design patterns
- Use RTK Query for efficient data fetching and state management
- Structure app navigation using React Router v6 with nested routes
- Participate in code reviews, architecture discussions, and team rituals

Fintech project.English B2+
A university degree in computer sciences.

Must have - experience within trading systems (stocks, shares).

⁃ Strong experience with TypeScript, Node.js and React
⁃ Practical experience with Next.js
⁃ Very good knowledge of SQL and relational DB
⁃ Experience with microservice architectures and container technologies
⁃ Initiative and the ability to generate ideas/provide solutions, not just code
 ⁃ Very good soft skills

We offer:

• Cooperation with a stable company with well-established processes and a positive atmosphere
• Experience in project management of different levels of complexity, methodology, and approaches
• Flexible schedule: Mon-Fri (8 hours a day)
• 18 days of paid vacation; 15 days sick leave
• A decent level of remuneration with regular reviews of the results of cooperation
• Extensive loyalty program