Jobs

We are looking for a Linux Administrator to support high-performance computing environments and critical distributed infrastructure.
 

In this role, you will:

• Administer HPC clusters for machine learning workloads (e.g., Slurm, Ceph)
• Maintain and support application infrastructure (web services, ERP systems, mail, LDAP, messaging services, etc.)
• Manage and automate workstation provisioning using Ansible
• Ensure stability, performance, and security of distributed systems
   

Requirements:

• Strong experience in Linux system administration (Ubuntu/Debian preferred)
• Strong C++ knowledge or experience working with C++ environments
• Experience with HPC environments and job schedulers (e.g., Slurm)
• Knowledge of distributed storage systems (e.g., Ceph or similar)
• Experience with infrastructure automation tools (e.g., Ansible)
• Solid understanding of networking fundamentals and security best practices
   

Nice to have:

• Experience with Python, Rust, or CUDA
• Familiarity with low-level Linux systems or kernel concepts
• Experience with web or backend systems
   

What we offer:
Work on cutting-edge autonomous driving tech, flexible hours, fast-paced engineering environment, competitive salary, and stock options.

We are the creators of a new fintech era!
Our mission is to revolutionize the world by making blockchain technology accessible to everyone in everyday life. WhiteBIT is a global team of more than 1,200 professionals united by a shared vision of shaping the Web3 future.
We are building our own blockchain ecosystem, ensuring maximum transparency and security for over 8 million users worldwide. Our cutting-edge solutions, rapid adaptation to market challenges, and technological excellence set us apart from traditional companies.
Our official partners include the National Football Team of Ukraine, FC Barcelona, Lifecell, FACEIT, and VISA.

The future of Web3 starts with you — join us as a CPA Account Manager!

Requirements:

Experience & language:
- 2+ years of experience in similar roles (in-app traffic management, mobile performance marketing, UA, affiliate/in-app partner management).
- English level B2 or higher — for communication with partners, reporting, and negotiations.

In-app traffic & advertising cycle:
- Understanding of in-app traffic.
- Understanding of the full cycle of in-app advertising: from media buying to post-install events.
- Knowledge of main in-app traffic sources: SDK networks, DSPs, arbitrage teams, media buying agencies, in-app publishers.

Analytics & traffic quality evaluation:
- Ability to analyze and evaluate traffic quality using key metrics: CTR, CR, Retention, ROMI, LTV, fraud indicators.
- Experience with mobile attribution.
- Confident use of Adjust and AppsFlyer.

Attribution mechanics:
- Understanding of IDFA/GAID, SKAdNetwork, fingerprinting, probabilistic matching.
- Anti-fraud skills.
- Ability to analyze fraud metrics: click spamming, click injection, bot traffic, anomalous behavior.
- Experience working with MMP anti-fraud dashboards (Protect360, Adjust Fraud Suite).
- Ability to run weekly/monthly reconciliations, request partner reports, and compare MMP data with partner reporting.

Partner acquisition & onboarding:
- Skills in sourcing new in-app traffic providers: publishers, networks, arbitrage teams, thematic communities, partner catalogs.
- Ability to conduct initial partner checks: cases, volumes, GEOs, quality, tracking setup.
- Negotiation skills: terms, KPIs, test volumes, payment format (CPA/RevShare).
- Understanding of technical requirements for partners (MMP setup, postbacks, event mapping).

Contacts & market knowledge:
- Existing network of partners or personal contacts among in-app traffic suppliers is a strong advantage.
- Understanding of the market: GEO coverage and formats of different networks/publishers, specifics of individual suppliers.

Data work:
- Strong Excel/Google Sheets skills: pivot tables, working with large datasets.
- Ability to interpret data and draw actionable conclusions.

Responsibilities:

Analytics & tracking:
- Create tracking links and postbacks.
- Analyze installs, events, cohorts, and advertising channels.
- Monitor metric deviations and identify root causes.

Attribution & anti-fraud:
- Apply knowledge of attribution mechanics (IDFA/GAID, SKAdNetwork, fingerprinting, probabilistic matching).
- Analyze fraud metrics: click spamming, click injection, bot traffic, anomalous behavior.
- Work with MMP anti-fraud dashboards (Protect360, Adjust Fraud Suite).
- Run weekly/monthly reconciliations, request and verify partner reports, compare MMP data with partner reporting.

Partner management:
- Search for and onboard new partners: publishers, SDK networks, DSPs, media buying agencies, arbitrage teams.
- Perform initial partner validation (cases, volumes, GEOs, quality, tracking).
- Negotiate terms, KPIs, test volumes, payment structures.
- Ensure correct setup for partners: MMP integration, postbacks, event mapping.

Data & reporting:
- Work confidently with large datasets in Excel/Google Sheets.
- Interpret data and prepare insights for optimization and decision-making.

Working conditions:
 

Immerse yourself in Crypto & Web3:
- Master cutting-edge technologies and become an expert in the most innovative industry.
Work with the Fintech of the Future:
- Develop your skills in digital finance and shape the global market.
Take Your Professionalism to the Next Level:
- Gain unique experience and be part of global transformations.
Drive Innovations:
- Influence the industry and contribute to groundbreaking solutions.
Join a Strong Team:
- Collaborate with top experts worldwide and grow alongside the best.

Work-Life Balance & Well-being:
- Modern equipment.
- Comfortable working conditions, and an inspiring environment to help you thrive.
- 24 calendar days of paid leave.
- Additional days off for national holidays.

With us, you’ll dive into the world of unique blockchain technologies, reshape the crypto landscape, and become an innovator in your field. If you’re ready to take on challenges and join our dynamic team, apply now and start a new chapter in your career!
Let’s Build the Future Together!

Full-time · Remote · Product Company

We’re helping our partner, product company building subscription-based digital products, hire a Performance marketing manager to take ownership of paid acquisition across Meta and Google.

Platform to create, edit and ship production ready visuals with AI - Pixa

The team is scaling user acquisition and looking for someone who can step in, audit the current setup, improve performance, and build a more scalable testing system for campaigns, creatives, and audiences.

This role is best suited for a strong senior specialist who is comfortable working with large budgets, understands mobile attribution, and can independently manage performance campaigns end-to-end.

You will work closely with the Head of Growth and collaborate with the creative team to continuously improve performance and unlock new growth opportunities.

What You’ll Do

Campaign Ownership

• Manage and optimize paid acquisition campaigns across Meta and Google
• Work with budgets exceeding $500k+ monthly spend
• Audit and restructure existing campaign setups
• Improve CPA / ROAS efficiency
• Identify new growth opportunities within existing channels

Testing & Experimentation

• Build and maintain a scalable creative and audience testing framework
• Launch and iterate experiments on a weekly basis
• Increase creative testing velocity and iteration speed
• Work closely with the creative team to develop new concepts

Performance Analysis

• Monitor campaign pacing and performance daily
• Analyze trends and identify performance drivers
• Build clear reporting and decision cadence
• Focus on real acquisition metrics rather than vanity metrics

Your core focus will be execution, experimentation, and performance optimization.

What We’re Looking For

• 3–5 years of hands-on paid media experience
• Strong experience with Meta Ads and Google Ads
• Experience managing $500k+ monthly budgets
• Background in direct-response campaigns
• Experience working with mobile attribution tools (Appsflyer or other MMP)
• Understanding of full-funnel conversion math
• Experience working with subscription-based digital products
• Strong knowledge of creative testing frameworks
• Ability to analyze data quickly and iterate campaigns
• Strong English communication skills

Nice to Have

• SQL or data analysis experience
• Experience with Meta influencer partnerships

How the Team Works

• Report directly to the Head of Growth
• Collaborate with the Head of Creative Strategy
• Work with external creative contractors
• Fast experimentation environment with quick decision cycles

Required timezone overlap: half-day with NYC

What’s Offered

• Fully remote
• Flexible working hours (half-day overlap with NYC)
• 3 weeks vacation + holidays
• High ownership and direct impact on growth metrics
• Opportunity to expand ownership over paid acquisition channels

We are looking for an experienced freelance developer to join an ongoing project for an international client. The role focuses on designing and building intelligent agent systems powered by large language models, alongside contributing to broader AI and Data Science initiatives.

Important!

This role involves some travel to the Netherlands to collaborate closely with the client, run in-person consulting sessions at the WeAreBrain office in Amsterdam, and occasionally visit the client’s office. Candidates must have the flexibility and ability to travel within Europe.

About the role You will work on both client-facing projects, designing LLM-powered agents, building the data infrastructure that supports them, and helping keep AI systems reliable in production. You'll collaborate directly with cross-functional teams, so strong communication skills are essential. The engagement is project-based 

Key responsibilities

·       Python software development across client and internal projects related to AI and Data Science

·       Design and implement LLM-powered AI agents, including agent configuration and prompt engineering

·       Build and maintain data pipelines that feed and support AI systems

·       Collaborate with cross-functional teams to define requirements and deliver features

·       Stay current with emerging AI frameworks, tools, and technologies

·       Contribute to monitoring and troubleshooting AI systems in production

Required skills and experience

·       Proficiency in Python, including async patterns, API integration, and production-quality code

·       Demonstrable experience designing and shipping LLM-powered agents (please share examples or repos)

·       Hands-on experience with frameworks such as LangChain, LlamaIndex, LangGraph, CrewAI, or similar

·       Solid understanding of prompt engineering, RAG pipelines, and tool/function calling

·       Experience building and maintaining data pipelines (e.g. Airflow, Prefect, Dagster, or equivalent)

·       Familiarity with vector databases and embeddings

·       Comfortable working in cross-functional teams and translating business requirements into technical solutions

·       Fluent professional English (written and spoken) – mandatory

Nice to have

·       Experience with multi-agent systems or agentic workflows in production

·       Background in MLOps, observability, or deploying LLM systems at scale

·       Experience with cloud platforms (AWS, GCP, or Azure)

·       Exposure to evaluation frameworks for LLM applications

On behalf of our Client from Spain, Mobilunity is looking for a Backend Developer.

Our Client is building a new digital product focused on ticketing solutions for the entertainment industry. The platform enables users to easily discover, purchase, and manage tickets for various venues such as clubs, concerts, and other live events.

The product is designed to provide a seamless booking experience, allowing users to access events, manage reservations, and interact with venues in real time. At the same time, it empowers businesses to efficiently manage ticket sales, optimize attendance, and build direct relationships with their audience.

This is a greenfield project aimed at rebuilding the service from scratch using modern technologies and scalable architecture.

Their goal is to create a leading platform in the entertainment space, helping venues and event organizers deliver a smooth and engaging digital experience, while increasing customer loyalty and operational efficiency.
 

Requirements:

Backend:
 

• Strong experience with PHP 8.2+ (typed properties, enums, readonly classes, attributes, fibers)
• Solid knowledge of Symfony 7 (Messenger, Doctrine ORM, DI Container, Security, Twig)
• Experience with MySQL / Doctrine DBAL, including complex queries, indexing, EXPLAIN, and transaction management
• Hands-on experience with Docker / Docker Compose
• Confident use of Git workflows (pull requests, code reviews)
   

Architecture & Engineering:
 

• Practical experience with DDD (bounded contexts, aggregates, value objects, domain events)
• Strong understanding of Hexagonal Architecture (Ports & Adapters)
• Experience with CQRS (commands, queries, handlers)
• Hands-on experience with event-driven architecture (async processing, event listeners)
• Solid understanding of SOLID principles and clean code practices
   

Frontend (basic knowledge):
 

• Basic experience with React and Next.js (ability to read and modify existing components)
• Working knowledge of TypeScript
• Familiarity with Zustand
• Ability to work with Tailwind CSS
• Experience with Twig
   

AI:
 

• Experience using AI coding assistants (e.g., Claude Code)
• AI-assisted code generation, testing, and documentation
• Ability to review and validate AI-generated output

In return we offer:
 

• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies
• Mobilunity Medical Insurance program designed to attend our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• Perfect office location in the city-center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
• No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups

Come on board, and let’s grow together!

PwC is a global network of more than 370,000 professionals in 149 countries that turns challenges into opportunities. We create innovative solutions in audit, consulting, tax and technology, combining knowledge from all over the world.

PwC SDC Lviv, opened in 2018, is part of this global space. It is a place where technology is combined with team spirit, and ambitious ideas find their embodiment in real projects for Central and Eastern Europe.

What do we guarantee?

• Work format: Remote or in a comfortable office in Lviv - you choose.
• Development: Personal development plan, mentoring, English and Polish language courses.
• Stability: Official employment from day one, annual review of salary and career prospects.
• Corporate culture: Events that unite the team and a space where everyone can be themselves.

At PwC, we collaborate with our clients, assist them in making informed decisions, operating efficiently, and we shape the future together. We offer enjoyable assignments and an inspiring working environment for this exciting challenge.

Sounds great? Now you have the opportunity to join us as a DevOps Engineer.

Our Smart Tax development team designs smart solutions for our clients’ accounting systems. If you feel like working on complex professional projects, you are the one we are looking for!

Why is this an exciting opportunity?

• You can work in a flexible, agile, and cheerful team, which works like a start-up in a corporation providing a safe environment; 
• You can work in a long-term project from the beginning and be actively involved in setting up the DevOps team and DevOps processes;
• You can receive instant feedback on your work as we work “close” to users, and you can have an overview of the entire development process.

What will you be doing?

• maintaining deployment pipelines, setting up and documenting CI/CD processes;
• setting up, configuring, and operating systems;
• improving the efficiency and performance of existing systems;
• liaising with and providing support for the development team;
• taking part in the design and development of business software deployment;
• What we work with: Azure Cloud technologies, Docker, Kubernetes (K8s, K3s), Kustomize, MSSQL Server, PostgreSQL, Azure DevOps, ServiceNow, JetBrains YouTrack, Git.

Our requirements:

• You must have at least 2-3 years of experience in DevOps;
• You must be acquainted with containerisation technologies (Docker, Kubernetes, Kustomize);
• You must be familiar with the operation of application servers;
• You must be able to work independently in your day-to-day work - we will support you in gaining new knowledge/solving new tasks;
• You must be experienced in the use of MSSQL/Azure SQL/PostgreSQL; 
• You must be knowledgeable about the Git version management system;
• You must have good communication skills in English (B2-C1).

Why is it worth choosing us?

• You will have the opportunity to work on diverse and exciting projects;
• You will work flexible hours and have the option of working from home;
• You will be part of a cool team open to new ideas;
• Our supportive leadership culture enables you to reach out and ask on an ongoing basis;
• You will have the opportunity to build relationships, which is indispensable for advancement;
• You will have various internal training programmes available to support your personal and professional development;
• We work towards shared goals and teamwork is essential to our day-to-day work;
• We expect and aim to achieve the highest professional standards.
• Besides work, we have the opportunity to be involved in numerous interesting corporate responsibility projects we favour, such as the Civil Mentoring Programme, the Volunteering Day, or trainings held for non-profit organisations;
• At PwC, we believe that diversity and complexity are key to building a responsible culture in which we create long-term value both for our employees and our clients. It is our primary goal to become an inclusive and supportive workplace by employing people with reduced work capacity.

Policy statements:
https://www.pwc.com/ua/uk/about/privacy.html

Ruby Backend Developer (Remote)

Role

Bluegeko is looking for a Ruby Backend Developer to join our fully remote team. You will work on scalable backend systems and APIs for U.S. based partner projects, collaborating with developers, QA engineers, and product teams across international environments.

Tech Stack

• Ruby / Ruby on Rails
• PostgreSQL
• REST APIs
• Sidekiq
• Redis
• Docker
• AWS
• GitHub / GitLab
• CI/CD pipelines
• RSpec

Responsibilities

• Develop and maintain backend services and APIs
• Participate in architecture discussions and code reviews
• Collaborate with developers, QA, and product teams
• Analyze requirements and break down technical tasks

• Improve system performance and reliability

   

Requirements

• 3yrs+ Experience with Ruby and backend development
• Experience with Ruby on Rails and SQL databases
• Understanding of scalable backend systems and APIs
• Familiarity with Git workflows and CI/CD
• Good English communication skills

What We Offer

• Fully remote position
• Competitive salary
• Performance bonuses (For delivery)
• Flexible working hours
• International U.S. projects
• Professional development opportunities
• Work on large-scale infrastructure products used globally