Kozak Agency

Project duration -  3 months+
Location - EU Only


Responsibilities

• Manage and optimise the Snowflake data warehouse, including query performance, warehouse sizing, resource utilisation, and cost efficiency.
• Maintain the reliability and performance of dbt projects, including data models, automated testing, documentation, and deployment processes.
• Oversee ELT pipelines, ensuring data availability, freshness, and compliance with established SLAs.
• Implement monitoring, alerting, and incident management processes, including root cause analysis and preventive measures.
• Establish data quality standards, automated validation, and observability practices across the data platform.
• Manage access controls, data governance policies, and compliance requirements.
• Monitor Snowflake consumption, implement cost optimisation strategies, and support platform budget planning.
• Develop operational runbooks, CI/CD workflows, and best practices for data engineering teams.
• Collaborate with Data Engineering, Analytics, BI, Security, and Finance teams to improve platform reliability and operational efficiency.

Requirements

• Extensive experience in Data Engineering, Analytics Engineering, DataOps, or Data Platform Operations.
• Strong hands-on experience with Snowflake administration, performance tuning, warehouse management, and SQL optimisation.
• Advanced proficiency in dbt Core or dbt Cloud, including incremental models, macros, testing, and deployment.
• Proven experience managing production ELT pipelines using Fivetran, Airbyte, Stitch, or similar solutions.
• Solid understanding of DataOps principles, CI/CD, version control, automated testing, and deployment pipelines.
• Experience implementing data quality frameworks, monitoring, alerting, and incident response processes.
• Understanding of data governance, access management, and data platform reliability.

Nice to Have

• Experience with data observability tools such as Monte Carlo, Elementary, or Datafold.
• Familiarity with workflow orchestration platforms such as Airflow, Dagster, or Prefect.
• Experience optimising cloud data platform costs, including Snowflake credit consumption and resource allocation.
• Knowledge of regulatory and compliance frameworks, including GDPR and SOC 2.

We are looking for a Senior Frontend Developer with strong commercial experience in WordPress theming to help us build a modern, high-quality website.
 

Requirements

• 5+ years of commercial experience with WordPress theming
• Strong experience with WordPress
• Hands-on experience with Advanced Custom Fields (ACF)
• Strong JavaScript / TypeScript skills
• Experience with Tailwind CSS
• Good understanding of responsive and cross-browser development
• Ability to build clean, reusable and maintainable frontend code
• Strong attention to detail and UI implementation
• Ability to work independently and take ownership of frontend tasks
   

Tech Stack

• WordPress
• ACF (Advanced Custom Fields)
• JavaScript / TypeScript
• Tailwind CSS
   

Responsibilities

• Develop and customize WordPress themes
• Build responsive and pixel-perfect frontend interfaces
• Work with ACF to create flexible and reusable content components
• Implement frontend functionality using JavaScript / TypeScript
• Style and structure interfaces using Tailwind CSS
• Collaborate with the team to deliver a high-quality website

Location: EU

Language requirements: Ability to work in an international and multicultural environment. Exact language level to be confirmed.

About the opportunity
We are looking for an Advanced Solution Architect to shape complex web information systems and geospatial platforms. You will combine hands-on technical expertise with architecture governance, security, integration, and release management.

What you’ll do

• Define application architecture for complex web and geospatial systems.
• Design APIs, microservices, data flows, and integration patterns.
• Guide development across Python backend and JavaScript or TypeScript frontend technologies.
• Define database architecture using PostgreSQL, PostGIS, or SQL Server.
• Establish container, CI/CD, monitoring, and release-management standards.
• Lead technical decisions concerning security, data migration, metadata, provenance, and quality assurance.
• Support architecture governance and ensure consistent implementation across teams.

What we are looking for

• 5+ years of application architecture and senior software development experience.
• 3+ years of API and microservices experience.
• 4+ years of Python backend development using Django, Django REST Framework, FastAPI, or comparable frameworks.
• 5+ years of JavaScript or TypeScript experience.
• 3+ years of React or Angular experience.
• 5+ years of database experience.
• 3+ years of Docker, OpenShift, or Kubernetes experience.
• 3+ years of Web GIS experience.
• Strong knowledge of REST APIs, CI/CD, security, monitoring, and release management.

Education and certifications !!!
One of the following:

• Master’s degree and 10+ years of relevant experience.
• Bachelor’s degree and 12+ years of relevant experience.
• Secondary education and 17+ years of relevant experience.

Mandatory cloud certification:
AWS Professional-level certification plus at least one relevant AWS Specialty certification, or
Professional-level or higher cloud certification from another provider.

Project Context: The final client is a U.S.-based independent insurance brokerage serving ultra-high-net-worth clients with Private Placement Variable Annuities (PPVA) and Private Placement Life Insurance (PPLI). We are building a mobile application that provides clients with secure access to policies, statements, documents, and self-service capabilities. The BA will bridge the existing web-based client portal (WordPress/MySQL stack) and the new native mobile product that initially should duplicate web portal functionality, but in the next phases new functionality would be needed. The BA will be responsible for the requirements specification and project documentation creation, aligning the web portal and mobile application in terms of functionality and ensuring clear guidance for the external back-end team (creators of the web portal) for the requested changes needed for the mobile app.

Engagement Type: Contract, part-time involvement, initially for  3-6 months. The specific number of hours required would be clarified later. Initial engagement for the first 1-3 weeks could be close to full-time involvement, but further engagement during the project is expected to be less than 0.5 FTE per week.

Location: Remote (CEST/EST overlap preferred for client sync)

Client Industry: Insurance brokerage, regulated financial services (SOC 2 Type II, NYSDFS compliance environment)

Start Date: End of October of  2026 (subject to contract signature)
Requirements (ideal scenario, ready to consider candidates that match 75% of the requirements):

 

1. Domain Experience

3+ years as BA in fintech, insurance, or regulated financial services (banking, wealth management, brokerage).
Demonstrated understanding of client portal → mobile app migration patterns (what works on web ≠ what works on mobile, especially with tables and reports).
Experience working with ultra-HNW or B2B2C client bases where UX must balance simplicity with compliance disclosures.
 

1. Technical Proficiency

Cross-platform mobile platforms: iOS and Android design patterns, platform-specific constraints (biometrics, push notifications, offline-first architecture).
API-driven product thinking: the mobile app will consume APIs from the existing portal backend - must be able to spec API contracts, data models, error states, and edge cases.
Legacy system integration: must be able to assess what can be exposed via API vs. what needs re-architecture.
 

1. Requirements Elicitation & Documentation

Proven ability to run discovery workshops with non-technical stakeholders (insurance advisors, compliance officers, C-suite) and translate business needs into user stories, acceptance criteria, and edge-case matrices.
Document clarity under regulatory scrutiny: requirements must be audit-ready (The client operates under SOC 2 + NYSDFS — every decision needs a paper trail).
 

1. Stakeholder Management

Multi-stakeholder alignment: Involvement of several decision-makers + likely compliance/legal functions in review loops. BA must navigate competing priorities without being a bottleneck.

Client-facing communication: must be able to present findings, trade-offs, and recommendations directly to the client in structured, concise formats in English..
Experience working within vendor-client dynamics (not internal product teams) — knows when to push back, when to escalate, when to adapt scope. 

We are looking for 2 experienced Full Stack Developers to join a team for an automotive project.

Tech stack

• Backend: Kotlin / Java
• Frontend: React
• Cloud: AWS
• Infrastructure: Kubernetes
• CI/CD: GitLab
• Messaging: Kafka
• Architecture: Microservices / Micro Frontends
• Development: Trunk-based development
• AI-assisted / agentic development workflows

Requirements:

• Strong backend development experience with Java/Kotlin or similar
• Solid React / frontend experience
• Experience with AWS / cloud environments
• Strong understanding of microservices
• Experience with Kafka / event-driven systems
• CI/CD and modern development practices
• Ability to work independently and take ownership
• Good English

Workload: full-time
Start: 1st of November
Duration: long-term (2-year contract)
Location: any, but preferably Ukraine or Europe
English: B2

Required expertise: at least 2 years of experience with Solidity and Javascript/Typescrypt!

We are building the next generation of onchain index products, making diversified crypto exposure simpler, more transparent, and accessible through a single token.
We are looking for a Smart Contracts Developer to join our team and help design, develop, test, and maintain the smart contracts powering the Indexfy ecosystem.

What you'll do

• Design and develop secure, gas-efficient Solidity smart contracts.
• Build and improve the infrastructure behind Indexfy's onchain index products.
• Develop vaults, token contracts, fee mechanisms, and other DeFi protocols.
• Write comprehensive unit and integration tests.
• Review and improve existing smart contracts with a strong focus on security.
• Participate in smart contract architecture and protocol design decisions.
• Integrate contracts with protocols such as Uniswap, Aave, Chainlink, and other DeFi infrastructure where relevant.
• Work closely with backend and frontend developers to integrate onchain functionality.
• Assist with contract deployments, upgrades, monitoring, and maintenance across EVM-compatible networks.
• Contribute to security reviews and prepare contracts for external audits.

Requirements

• Strong experience with Solidity and EVM-based blockchains.
• Solid understanding of ERC-20, ERC-4626 and DeFi protocols.
• Experience with Hardhat, Foundry or similar development frameworks.
• Strong understanding of smart contract security and common Solidity vulnerabilities.
• Experience writing automated tests for smart contracts.
• Good understanding of blockchain architecture, transactions, gas optimization, and contract interactions.
• Familiarity with OpenZeppelin contracts and libraries.
• Ability to write clean, maintainable, and well-documented code.

Nice to have

• Experience with Base / Ethereum.
• Experience with Uniswap V3/V4, Aave, Chainlink or other DeFi protocols.
• Experience building vaults, index products, AMMs or financial protocols.
• Experience with cross-chain protocols such as Chainlink CCIP or LayerZero.
• Previous experience preparing smart contracts for security audits.
• Contributions to open-source blockchain projects.

 Duration: 12 months, long-term
 Start: mid-October
 Workload: Full-time, 100% Remote
 Timezone: CET (candidate location is flexible — EU, Balkans, Ukraine, CIS, Asia, Africa, Middle East all OK)
 English: Upper-Intermediate+ — must be able to lead technical calls

Project Overview
 Senior Full-Stack Developer needed to design and develop scalable applications spanning both frontend and backend, with strong system architecture and integration skills.

Must-Have Requirements

• 5+ years of hands-on experience designing and developing scalable applications (frontend + backend)
• Python/Django/DRF — 5+ years, in-depth, building robust and efficient applications
• REST API design and development, third-party integrations, various communication protocols
• Scalable system architecture — proven expertise in system design and integration strategies
• Git + CI/CD — extensive experience with version control and CI/CD pipeline setup/management
• React.js — 3+ years commercial experience
• TypeScript
• Redux / RTK / MobX
• SWR / RTK-Query
• Hooks
• SASS / Bootstrap (or similar)
• Strong analytical and problem-solving skills, attention to detail
• English Upper-Intermediate+ — able to lead technical calls/discussions with global teams
   

Nice to Have

• Docker / Kubernetes (containerization, deployment, orchestration)
• AWS / Azure / GCP (cloud-native development

Main Responsibilities – Engineering Team
 

• Maintenance and further development of existing platform services
• Development of new backend features and services
• Backend development with TypeScript, Node.js and NestJS
• Development and operation of AWS-based services
• Working with microservice and event-driven architectures
• Taking ownership of existing production services
• Analysis and reverse engineering of existing applications
• Working with legacy code and historically grown systems
• Production troubleshooting and incident resolution
• Ensuring stability and reliability of production applications
• DevOps and operations activities
• Monitoring, logging and observability
• Technical modernization and reduction of technical debt
• Performance optimization
• Proactive identification of architectural and operational improvements
• Selected frontend/full-stack tasks using React

Critical Must-Haves – Engineering Team

• TypeScript
• Node.js
• NestJS
• AWS
• Microservices
• Event-driven architectures
• AWS EventBridge
• AWS SQS
• PostgreSQL
• Production cloud applications
• Legacy systems
• Reverse engineering
• Modernization of existing applications
• DevOps
• Operations
• Incident Management
• Production troubleshooting
• Monitoring
• Observability
• Experience taking ownership of existing production services
• High seniority level across the team
• React - required within the team: at least 1–2 engineers must be able to cover React-based full-stack tasks.
  
  This is primarily a backend/platform project, not a classical full-stack project.
  
  Start: mid-October/November
  Duration: 6 months + possible extension
  Workload: By agreement, 120–160 hours/month per resource, depending on the proposed profile and team composition
  Team size: 4 developers + 1 Engineering Manager, 5 people in total
  Location: EU (remote) !!!
  Language: English

Project Details
Project: Greenfield Accounting Engine
Start: Mid/late October, latest early November 2026
Duration: 6 months with option for extension
Workload: 120–160 hours/month
Location: Remote / Nearshore
Time Zone: Maximum ±1 hour from Germany
Language: English
Team: 5 Backend Developers + 1 Engineering Manager

The project is particularly suitable for experienced backend engineers who are comfortable working in a modern, architecture-driven environment with a strong focus on engineering quality, scalability and structured software delivery.


Developer focus: Kotlin + Spring Boot/WebFlux + AWS + Event Sourcing + DDD + TDD, with very strong software quality standards.

The client is building a new Accounting Engine that will become the central accounting platform for new markets. The solution will process business events such as invoices, receipts and transactions, generate accounting entries, and support reporting and further data-driven analytics.

Must-have

Backend:

• Kotlin
• Spring Boot
• Spring Boot WebFlux
• AWS
• PostgreSQL
• AWS Aurora PostgreSQL
   

Architecture:

• Event Sourcing
• Domain-Driven Design (DDD)
• Modern backend architecture
• Hexagonal Architecture
   

Quality:

• TDD
• Test-driven development
• High test coverage
• Strong software quality standards
• Quality gates
   

🟡 Should-have

• jOOQ
• Flyway
• Hexagonal Architecture
• Greenfield projects
• GitHub
• GitHub-based CI/CD
• SonarCloud
• Experience working with Product Owners
• Delivery-driven development
   

🟢 Nice-to-have

• AI Engineering
• AI-assisted development
• AI Delegated Engineering
• Claude / Cursor
• Basic accounting knowledge

Start: asap
Duration: 15.12.2026 (option of extension)
Workload: 100%
Location: remote
Language: English

Project Objective
• Implementation of an engineering initiative for:
• Automating IoT Hub disaster recovery processes
• Scaling frontend capacities
• Introducing Mender Enterprise for secure software updates

Role in the Project
Implementation of the backend integration of Mender Enterprise SaaS into the e.IoT platform for secure, large-scale software updates.

Responsibilities
• Deployment and backend API integration of Mender Enterprise into the e.IoT platform
• Setup of software package signing pipelines
• Implementation of automatic fail-safe rollback mechanisms for edge updates

Required Profile
• API integration expertise

• Very strong scripting skills in:
o Python
o Bash
o PowerShell

• Experience with:
o Software supply chain security
o Code signing
o Secrets management
•   Mender Enterprise
•    API Integration
•    Python
•    Bash
•    PowerShell
•    Software Supply Chain Security
•    Code Signing
•    Secrets Management
•    Edge Device Update Management

 

Details:
Start: asap
Duration: until 31.12.2026 (option for extention)
Location: 100% remote
Language: English
Region: Europe only (outside DACH)!!!

Skills (must have):

• Strong Python expertise combined with hands-on experience in trading or algorithmic trading
• Practical experience with trading strategies, automated trading systems, or trading platforms
• Previous exposure to energy trading, financial markets, or comparable trading environments
• A combination of strong technical/programming skills and domain knowledge in trading
• ReactJS and Java
• Cloud Providers: Microsoft Azure
• Docker, Kubernetes, Kafka
• PostgreSQL, Redis
• Microsoft Azure

Tasks:

• User onboarding and platform readiness
• Onboard new users onto the existing execution platform.
• Configure required access, permissions, and operational setup.
• Support user readiness for trading and monitoring workflows.
• Programmatic interface and risk monitoring integration
• Enhance the programmatic access layer of the execution platform.
• Develop the interface between the execution platform and the internal risk monitoring tool.
• Support automated data exchange between trading logic, execution components, and monitoring services.
• Implement or support post-trade checks, monitoring logic, and relevant control calculations.
• Advanced algorithmic trading capabilities
• Support the development of advanced algorithms for the current execution platform.
• Develop and integrate Python and Java backend applications with Azure services such as Azure Kubernetes Service, PostgreSQL, Redis, Kafka, Azure Machine Learning, and Azure DevOps.
• Extend platform capabilities to support future algorithmic trading use cases.
• Engineering collaboration and quality
• Collaborate with architects, traders, product owners, and engineering teams to design scalable, efficient, and secure software solutions.
• Ensure code quality and adherence to software development best practices, including documentation, version control, testing, and code reviews.

We are looking Senior Kubernetes Platform Engineers to join a large-scale cloud-native platform project focused on Kubernetes, platform automation and GitOps.

 

• Remote within Europe
• Start: ASAP
• Duration: Until end of the year + strong extension potential
• Capacity: 100%
• Project language: English
• Time zone: German business hours

Responsibilities

• Scale, optimize and enhance existing Kubernetes clusters
• Design and configure new cluster environments
• Develop and maintain Kubernetes Operators & Custom Controllers
• Work with Go & Kubebuilder
• Build and improve platform automation
• Automate infrastructure and platform lifecycle processes
• Implement GitOps workflows with FluxCD
• Work on testing, reliability and continuous platform improvements

Requirements

• Strong hands-on Kubernetes experience in enterprise-scale environments
• Experience operating and scaling large Kubernetes landscapes
• Strong Go (Golang) skills
• Kubebuilder
• Proven experience with Operators / Custom Controllers
• Strong GitOps knowledge
• FluxCD
• Crossplane
• Platform Engineering & Platform Automation experience
• Fluent English

Nice to have:

• Gardener
• SAP BTP
• AWS / Azure / GCP
• Large-scale cloud-native platforms
• Platform Engineering / SRE experience

Project: Fast-growing SaaS startup transforming the professional services industry with AI-powered software that automates complex workflows across documents, search, and matter management.

Responsibilities:
• Act as an independent technical owner to deliver complex product and infrastructure features from architectural design to deployment
• Build and optimize AI-powered workflows, including LLM agents, document processing, and tool calling
• Design robust backend systems, APIs, data flows, queues, and third-party integrations
• Debug and resolve complex production issues across the full stack using traces and logs
• Utilize AI coding tools (Claude Code, Cursor, Codex) as a daily force multiplier to accelerate development velocity

Requirements:
• 7+ years of professional software engineering experience
• Strong proficiency in Python with FastAPI (or similar frameworks) and TypeScript with React
• Advanced SQL expertise and schema design, preferably with PostgreSQL
• Solid experience with cloud infrastructure (Azure, AWS, or GCP), Docker, and CI/CD pipelines
• Deep architectural skills for designing highly reliable async systems, APIs, workers, and queues
• Hands-on technical experience operating production LLM features, agents, prompt workflows, and RAG/search systems
• Practical experience with observability, metrics, and tracing tools (Datadog, PostHog, Langfuse, OpenTelemetry)
• Proven track record of autonomous, end-to-end delivery of production-ready systems

Full-time. 6-8 months, start in 2-3 weeks

We are looking for 3 Senior Java Developers for a long-term project in the banking / payments domain.
 

Tech Stack:
• Java
• Spring Boot
• Kafka
• REST / SOAP
• PostgreSQL
• S3
 

Must-have requirements:
• Senior-level Java / Spring Boot experience
• Experience with Kafka and REST/SOAP integrations
• Experience with PostgreSQL and S3
• !!! Mandatory experience in banking, payment systems, or FinTech
• !!! The candidate must be located in Europe
 

Open positions: 3 developers
Project duration: until the end of 2027, with the possibility of extension
Location: Europe
 

Role Summary
Technical implementation role focused on building, automating, operating, and scaling the Renovate platform across a very large GitLab landscape.

Key Responsibilities:
• Implement and deploy the self-hosted Renovate environment
• Build automated repository discovery and onboarding processes via GitLab APIs
• Create and maintain central configuration presets and repository-level extensions
• Implement monitoring, logging, alerting, and reporting dashboards
• Optimize performance, scalability, caching, and rate-limit handling
• Integrate artifact repositories and secure credential stores
• Produce operational documentation and support development teams during rollout
• Ensure stable operation across thousands of repositories

Required Skills:
• Proven experience as DevOps, Platform, or Automation Engineer
• Strong GitLab CI/CD and GitLab API expertise
• Hands-on experience with Kubernetes and container platforms
• Infrastructure-as-Code knowledge (e.g. OpenTofu, Helm)
• Scripting/programming skills (Bash, Python, JavaScript/TypeScript)
• Experience with observability platforms, ideally New Relic
• Knowledge of Vault, secrets management, and package/container registries
• Practical Renovate experience
• Strong automation mindset and independent working style

Project Details
·      Start: asap
·      End: 15 December 2026 (including option for extension)
·      Remote assignment
·      German client in the energy sector
·      Agile setup
Language : English