Kozak Agency

Platform-as-a-Service, яка дозволяє розгортати та керувати Mendix (No-Code) застосунками. Проєкт за логікою схожий на AWS/Azure (Lambda/Functions). 

Технології проєкту
 Front-End: React 
 Back-End: Golang
 Інфраструктура: Kubernetes, VictoriaMetrics Старт: 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 

Location: ONLY Poland
English: Fluent
Experience: 6+ years

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 

English: Intermediate+

Requirements:

• 3+ years of commercial experience with Webflow
• Strong understanding of responsive layouts, accessibility, and SEO best practices
• Experience building complex CMS structures and dynamic content in Webflow
• Ability to implement pixel-perfect UIs from Figma, including custom interactions and animations
• Knowledge of HTML, CSS, JavaScript for extending Webflow functionality
• Familiarity with performance optimization (lazy loading, WebP, clean CMS design)
• Understanding of localization (i18n), multi-language setups in Webflow
• Bonus: experience with API integrations, custom embeds

This is a per-project, milestone-based role that could turn into a full-time position for the right candidate. 

Description:
We are building an AI-powered training platform designed for enterprise clients. The platform allows companies to create and deploy AI personas that simulate real conversations for sales, customer service, and compliance training. These personas are powered by LLMs, can interact via voice and chat, and are enhanced with custom video avatars for a more engaging learner experience.

Your role:
You’ll own the Python side of our stack, driving AI integrations and backend logic. You’ll work closely with our team to ensure APIs, services, and models are running smoothly and efficiently.

Responsibilities:

• Develop and maintain Python-based services powering the AI platform
•  Integrate LLMs (OpenAI, Anthropic, etc.) and video/avatar APIs (HeyGen, D-ID, ElevenLabs, etc.)
• Optimize backend logic for performance, scalability, and compliance
• Collaborate with frontend (Next.js) and Node.js services for seamless experiences
• Deliver clean, well-documented, production-ready code
   

Requirements:

• Expert in Python (async, API frameworks, data pipelines)
• Experience with AI/LLM integrations and external APIs
• Familiarity with enterprise security practices (SSO, Okta, RBAC, encryption)
• Strong problem-solving and debugging skills
• Ability to quickly onboard into an existing codebase

Please note that for this role, we are specifically looking for a female candidate, as the client is focused on building diverse teams and gender diversity is currently a key priority.

Role Details:

• start: ASAP
• duration: Until the end of the year, with possibility of extension
• workload: Full-time (9 AM – 6 PM UK time)
• device: Mac required
• interview Process: First interview with us, followed by one with the client
   

Tech Stack:

• Backend: Node.js, AWS (SNS, SQS, Lambda, EventBridge), event-driven architecture, MongoDB, Serverless, Terraform, GitHub Actions
• Frontend: React, Redux, Next.js, MaterialUI
• GraphQL, DynamoDB
• Jest
   

Soft Skills:

• Result-oriented
• Proactive
• Collaborative/team-oriented

We are looking for an experienced NestJS developer to support our backend development. The main focus will be building and maintaining RESTful APIs and ensuring secure integration with our authentication/authorization system.

You will work closely with our in-house team to implement new features, optimize performance, and help migrate from our current Adobe authentication setup to Keycloak.

Responsibilities:
- Design and implement RESTful APIs using NestJS
- Secure API endpoints with proper authentication and authorization
- Integrate with Keycloak for user management and custom authentication flows
- Collaborate with our team to understand requirements and deliver clean, maintainable code
- Write unit/integration tests to ensure reliability
- Participate in code reviews and propose improvementsRequirements
- Strong experience with NestJS
- Proven ability to build and scale RESTful APIs
- Familiarity with authentication/authorization best practices
- Good understanding of relational databases and ORMs
- Comfortable with Git workflows

Nice to Have:
- Experience with Keycloak (or similar IAM solutions)
- Knowledge of AWS and Docker
- CI/CD pipelines setup experience 

We are looking for an experienced NestJS developer to support our backend development. The main focus will be building and maintaining RESTful APIs and ensuring secure integration with our authentication/authorization system.

You will work closely with our in-house team to implement new features, optimize performance, and help migrate from our current Adobe authentication setup to Keycloak.

Responsibilities:
- Design and implement RESTful APIs using NestJS
- Secure API endpoints with proper authentication and authorization
- Integrate with Keycloak for user management and custom authentication flows
- Collaborate with our team to understand requirements and deliver clean, maintainable code
- Write unit/integration tests to ensure reliability
- Participate in code reviews and propose improvementsRequirements
- Strong experience with NestJS
- Proven ability to build and scale RESTful APIs
- Familiarity with authentication/authorization best practices
- Good understanding of relational databases and ORMs
- Comfortable with Git workflows

Nice to Have:
- Experience with Keycloak (or similar IAM solutions)
- Knowledge of AWS and Docker
- CI/CD pipelines setup experience 

Description:
We are looking for a Senior Rust Developer. Their goal is to advance computational biology by developing scalable, open-source workflow execution engines that empower scientists to efficiently deploy and manage large-scale computations.

General Information
Location: Remote.
Open to talents from GMT-8 to GMT+5 time zones. The client is not open to China, Australia or countries in similar time zones. 
Overlap: 3 - 4 hours with Chicago/Texas (US Central Time)
Length: 6 months (with potential for extension)

Project Information
Sprocket is an open workflow execution engine written in Rust—it enables scientists, who are generally not experts at scaling and deploying large-scale computation, to write simple workflow descriptions using the Workflow Description Language.

Experience
Required Skills:

• Senior-level proficiency in Rust, with a strong track record of shipping production code
• Experience contributing to or leading open-source projects
• Familiarity with workflow engines, scientific computing, or large-scale computation
• Ability to work with Rust crates for lexing, parsing, validating, linting, formatting, testing, and executing domain-specific languages
• Strong skills in API design and specification development
• Experience using GitHub for project planning and collaboration

Optional Skills (not mandatory):
 

• Experience developing or improving specifications using OpenAPI (Swagger)
• Familiarity with the Workflow Description Language (WDL) and Task Execution Schema (TES)
• Experience with Kubernetes or cloud/HPC environments
• Prior involvement with standards bodies (e.g., GA4GH)
• Experience with Rust crates such as utoipa for OpenAPI/Swagger documentation

Deliverables
 

• Contribute to the development and enhancement of the Sprocket workflow execution engine and related Rust crates (e.g., wdl, sprocket, crankshaft)
• Improve and extend the Workflow Description Language (WDL) specification, including proposing, drafting, and shepherding changes through the ratification process
• Collaborate on the evolution of the Task Execution Schema (TES), including interaction with standards bodies and the open-source community
• Develop and maintain reference implementations, ensuring comprehensive API documentation (OpenAPI/Swagger)
• Regularly communicate progress and coordinate with the internal computational biology team
   

Engagement Highlights
Full-time and long-term role
Opportunity to work on impactful, open-source technology used by scientists worldwide
Influence the direction of open standards in scientific workflow execution

Detailed Required Skills:
Open Source, APIs, API Design, GitHub, Rust, Workflow Description Language, Task Execution Schema, Kubernetes

Job Timezone: America/Chicago
Work Type: Remote
Estimated Length: 3-6 months

We are seeking a Senior Svelte Front-end Developer with experience in Golang (so that they are full-stack). It is essential that the person is highly product-driven, self-motivated, speaks excellent English, and enjoys using coding AI tools like Claude Code.

Our stack:
● Frontend: SvelteKit, turbo monorepo, Vercel
● Backend: Golang monorepo
● AI: Claude Code (mandatory), other agentic coding tools

What you’ll actually do:
● Own features end-to-end: from specs to deployment to fixing bugs
● Use Claude Code to generate SvelteKit frontend and Golang backend code
● Review AI output for quality and architectural fit
● Fix bugs to learn our codebase, then rapidly build new features
● Make quick decisions on what to build vs buy vs generate with AI
● Talk to customers when they report issues and ship fixes the same day

You must have:
● Ownership mentality with a strive for elegantly simple, high-quality solutions
● Strive for max quality — you test your own work thoroughly since we have no QA team, everything you ship MUST work
● Product mindset — you care about WHY we’re building something
● Proven experience using Claude Code or similar agentic AI (Cursor, Windsurf)
● Strong SvelteKit and Golang experience — you’ll review AI’s code in these, and you must understand how it works
● Broad architectural knowledge of building modern full-stack applications
● Excellent spoken English and a good internet connection for daily video calls

You are a great fit if you:
● Get frustrated when development takes weeks instead of days
● You think in features and architecture, and not single lines of code
● Can spot subtle bugs in AI-generated code quickly
● You ship fast, but always verify it actually works
● Have shipped real products that customers actually use
● Think “how can AI build this?” as your first instinct