Jobs

An international IT holding with 11+ years in the market and a team of 390+ employees is scaling. 
The holding is launching a new business unit focused on traffic monetization and affiliate partnerships. The Head of Affiliate Sales will be responsible for building this direction from the ground up and developing a scalable model for monetizing traffic generated by the internal media buying teams.

📋 Key responsibilities and your contribution:

• Develop and implement the company’s traffic resale strategy (Resales Direction).
• Manage internal traffic monetization channels, including Facebook Ads, ASO, SEO, and other performance marketing sources.
• Build and scale a traffic resale ecosystem through affiliate networks, direct advertisers, and media buying teams.
• Identify, onboard, and develop relationships with new advertisers, affiliate networks, and affiliates to scale traffic sales.
• Conduct negotiations and partnership agreements, including commercial terms and payout conditions.
• Manage traffic unit economics, ensuring control over ROI, CPA, CPL, margins, and channel efficiency.
• Analyze traffic performance and continuously optimize monetization funnels.
• Build and develop the team within the direction (affiliate managers, sales managers, traffic managers).
• Establish and optimize traffic sales and distribution processes between advertisers and partners.
• Ensure traffic quality and compliance with partner program requirements.
• Work with analytics and tracking systems to evaluate performance and support decision-making.
• Develop long-term partnerships with key advertisers and affiliate networks.
• Monitor the affiliate and performance marketing market, identifying new traffic sources and traffic monetization models.
• Monitor the affiliate and performance marketing landscape to identify new traffic sources and monetization models.
   

📚 Your qualifications:

• 3–5+ years of experience in iGaming affiliate marketing or traffic arbitrage, preferably in a leadership role.
• Deep understanding of the digital traffic ecosystem, including Facebook Ads, affiliate networks, ASO, SEO, and other performance marketing channels.
• Experience in traffic monetization.
• Hands-on experience working with internal traffic sources and scaling them.
• Strong understanding of traffic unit economics, including ROI, CPA, CPL, LTV, margins, and funnel optimization.
• Experience in building and managing teams (sales managers, traffic managers, affiliate managers).
• Strong negotiation skills and experience in closing partnership agreements with advertisers and affiliate networks.
• Ability to build and optimize traffic resale processes.
• Experience working with trackers, analytics platforms, and BI tools (e.g., Keitaro, Power BI, Google Analytics, etc.).
• Strong analytical skills and the ability to make data-driven decisions.
• English proficiency sufficient for negotiations and working with international partners.
   

➕ Nice to have:

• Experience in traffic reselling.
• An established network of contacts among advertisers, affiliate networks, affiliates, and media buyers.
• Experience working with multiple GEO tiers (Tier 1–3).
   

Benefits:

⭐ Days of recovery: 20 paid vacation day per year and unlimited sick leave days.
⭐ Health: corporate medical insurance, a company psychologist and a Cafeteria of Benefits for personal wellness choices.
⭐ Education: a variety of foreign languages course for you to choose from. Also we are open for your development and you can choose different courses /training for improving your skills.
⭐ Compensation: additional benefits that can be used according to company policy, e.g. paid business trips, international conference opportunities, lunch perks at our offices etc.
⭐ Work Environment: work remotely or from one of our offices in Cyprus, Portugal, Poland, equipped with the equipment you’ll need for success.

Description of the Project and Team:

The Senior Forward-Deployed Engineer bridges the gap between our AI platform and real-world client environments. This role combines deep technical expertise with strong client-facing skills to deliver customized AI implementations, lead technical discovery, and ensure successful solution adoption.

You will work closely with enterprise clients, internal AI engineers, Solution Designers, and leadership teams to design, prototype, and deploy advanced AI solutions, often in ambiguous and fast-changing environments. This is a hands-on role for someone who thrives at the intersection of engineering, architecture, and client collaboration.

Location: Remote / Hybrid (Ukraine / EU), with occasional international business travel to client sites

Responsibilities:

Client Engagement & Technical Leadership

• Lead technical discovery sessions and requirements workshops with clients
• Design and architect custom AI solutions tailored to client needs
• Serve as the primary technical point of contact for assigned client accounts
• Present technical solutions to C-level and senior stakeholders

Solution Implementation

• Implement, customize, and deploy AI solutions in client environments
• Integrate LLM vendors and platforms with client systems and data sources
• Develop Proofs of Concept (PoCs) and MVPs to validate solution approaches
• Troubleshoot and resolve complex technical issues in production environments

AI-Augmented Development

• Lead AI-augmented development practices within project teams
• Leverage GenAI tools for rapid prototyping and solution acceleration
• Design and implement Agentic systems and RAG pipelines
• Evaluate and recommend AI tools and technologies for specific use cases

Team Leadership & Mentoring

• Mentor Solution Designers and software engineers
• Conduct code reviews and architecture reviews
• Contribute to technical standards and engineering best practices
• Support presales activities with technical expertise and solution demos

Required Qualifications:

Experience

• 3+ years in software development
• 2+ years in client-facing technical roles (Solutions Engineer, Technical Consultant, FDE, etc.)
• 1+ year of hands-on experience with LLMs / GenAI technologies
• Proven track record of successful project deliveries

Portfolio Requirements

• Complex system implementations (architecture decisions, trade-offs, outcomes)
• Client success stories showing how technical solutions solved business problems
• AI / GenAI project experience (LLM integrations, RAG systems, AI-powered tools)
• Open-source contributions or technical writing (optional, but highly valued)

Technical Skills

• Software Architecture: Scalable, maintainable systems; microservices and event-driven architectures
• Python Development: Production-grade Python, async programming, API development
• LLM / GenAI Integration: RAG systems, prompt engineering, LLM APIs (OpenAI, Anthropic, Azure OpenAI)
• API Design & Integration: REST, GraphQL, webhooks, third-party APIs
• Databases: SQL optimization; vector databases (Milvus, Pinecone, Weaviate, pgvector)
• Cloud Platforms: AWS or Azure, serverless architectures, Docker, Kubernetes
• DevOps & CI/CD: GitHub Actions, deployment pipelines, infrastructure as code
• Analytical Thinking: Complex problem decomposition, root cause analysis, system optimization
• Business Analysis: Requirements elicitation, process mapping, stakeholder management, ROI analysis

AI-Augmented SDLC Skills

• AI Coding Assistants (Expert): Replit, Claude Code, Cursor, GitHub Copilot
• AI Output Validation (Expert): QA of AI-generated code and content
• Prompt Engineering (Advanced): Few-shot learning, chain-of-thought prompting
• AI Architecture Design (Advanced): RAG pipelines, agent systems, multi-model orchestration

Soft Skills

• Strong client communication skills (assessed via role-play)
• Clear and confident technical presentation skills (assessed via live demo)
• Problem-solving mindset (assessed via technical case study)
• Leadership and mentoring abilities (assessed via behavioral interview)
• High adaptability to ambiguity and changing requirements

Languages

• English: Upper-Intermediate+ (B2/C1) or higher
• Ukrainian: Native or C1 required

Education

• Bachelor’s degree in Computer Science, Software Engineering, or a related field

Nice to Have:

• Specification-driven development using AI-assisted requirements and documentation workflows
• Master’s degree or relevant certifications (AWS, Azure, AI/ML)

We are delighted to provide you with the following benefits:

• Opportunities for growth and development within the project
• Flexibility in scheduling
• Stable employment
• Legal assistance
• Paid time off for vacation and sick leave

As a Senior ML Engineer, you will work on retention and churn prediction models built on large-scale behavioral datasets.
You will focus on feature engineering, model development, and building reliable training and batch inference pipelines that transform player activity data into production-ready predictive systems.
This role combines strong analytical thinking with practical ML engineering skills and close collaboration with the ML Lead.

Responsibilities

• Build and improve churn and retention prediction models using player behavioral data
• Design time-based features (rolling windows, aggregates, decay metrics)
• Train, validate, and iteratively improve gradient boosting models
• Develop reproducible training and batch scoring pipelines
• Analyze model performance and refine feature sets

• Support deployment of models into production scoring services

   

Requirements

• 4+ years of experience in ML Engineering / MLOps with production systems.
• Strong Python for ML and data processing (NumPy, pandas, scikit-learn)
• Experience with gradient boosting models (CatBoost, XGBoost, LightGBM)
• Experience building predictive models on tabular event data (churn, retention, risk)
• Strong understanding of time-based feature engineering and leakage-safe modeling
• Experience building ML training and batch inference pipelines
  Strong analytical and statistical thinking

Would Be a Plus

• Experience with behavioral feature engineering (rolling windows, aggregates)
• Experience with clustering or user segmentation
• Experience deploying ML services (FastAPI, Docker)
• Experience with ML lifecycle tools (MLflow or similar)
• Experience with workflow orchestration tools (Airflow, Prefect, Dagster)
• Experience with AWS or similar cloud environments
• Experience with deep learning frameworks (PyTorch / TensorFlow)

Tech Stack

• Python, NumPy, pandas, scikit-learn
• CatBoost / XGBoost
• SQL
• FastAPI, Docker
• MLflow (or similar)
• AWS or similar cloud environment

What We Offer

• Full ownership of a greenfield ML platform.
• Direct impact on revenue-driving retention systems.
• High level of autonomy in technical decisions.
• Competitive compensation.
• Flexible working format.
• Opportunity to shape the ML engineering foundation of the product.

Our Customer:

Our customer is a global, data-driven digital advertising technology company operating at large scale across mobile apps and web platforms.
 

Your Tasks:

• Analyze large, complex datasets to uncover patterns, insights, and business opportunities;
• Design, build, and own scalable, end-to-end data pipelines;
• Develop and productionize advanced machine learning models and algorithms, particularly in monetization-related domains;
• Build and maintain data models for real-time (online) processing;
• Contribute to the creation of new data-driven products and continuously improve existing ones;
• Collaborate with Product, BI, Analytics, DevOps, R&D, and Marketing teams to deliver complete solutions;
• Lead full production releases, including requirements analysis, testing, monitoring, result evaluation, and rapid response to critical issues.
   

Required Experience and Skills:

• 6+ years of experience as a Data Scientist with a strong foundation in machine learning concepts and models;
• Previous experience in the Ad-Tech industry;
• Hands-on experience working on large-scale, high-load systems processing billions of requests per second;
• Hands-on experience with Python including writing production-ready code and working with modern Python frameworks and tooling;
• Experience with data science / ML libraries and models, such as regression and classification models (e.g. XGBoost, LightGBM), recommendation systems, and related ML techniques;
• Solid understanding of databases and SQL for data analysis and retrieval;
• Experience with monitoring and alerting tools such as Grafana and Kibana;
• Proven experience working in real-time / online environments;
• Bachelor’s or Master’s degree in Computer Science, Engineering, Mathematics, Statistics, or a related field;
• Strong end-to-end ownership mindset: ability to take solutions from research and experimentation through implementation and production;
• Fluent English with strong communication and collaboration skills.
   

Would Be a Plus:

• Familiarity with the programmatic advertising ecosystem (DSPs, SSPs, ad exchanges);
• Experience with relational databases (e.g. Vertica, VoltDB) and non-relational databases (e.g. MongoDB);
• Experience working with PMML.

Working conditions

5-day working week, 8-hour working day;

Remote work.

About Us…

In 2005, brothers Dimitri and Steve Osler set out to reimagine how businesses communicate, and that vision became Wildix. Today, from our headquarters in Tallinn, Estonia, Wildix is one of the world’s fastest-growing UCaaS companies, with 300+ team members from 15+ nationalities, working across Europe, the UK, the Americas and beyond. We serve businesses in 135+ countries through a partner-first ecosystem, delivering secure, intuitive solutions that keep companies connected, productive and ready for what’s next.

At Wildix, we don’t just build technology, we live it. As a remote-first company, we rely on our own platform every day to collaborate globally and innovate fast. With steady growth and a strong foundation, we offer real opportunities to advance your career as we scale, making an impact in a global team that’s shaping the future of work.

At Wildix, our mission is clear: Empower companies worldwide with seamless communication solutions that drive productivity, efficiency, and growth.

About The Role…

We are looking for an experienced Infrastructure Security Engineer to strengthen and harden our AWS-based infrastructure. This role will focus on designing, implementing, and continuously improving our security posture, ensuring compliance with best practices, and proactively identifying and mitigating risks across our cloud environment.

What You Will Do…

• Drive continuous security improvements in AWS based on SIP findings.
• Maintain “100% Green” status in AWS Trusted Advisor and Security Hub.
• Own IAM security, enforcing MFA, auditing admin access, rotating keys, and implementing least-privilege roles.
• Manage temporary privileged access workflows to ensure secure, time-bound access.
• Lead the lifecycle of infrastructure security findings, from triage to remediation and verification.
• Build and operate centralized logging and SIEM for full visibility and threat response.
• Collaborate with DevOps/SRE teams to embed security into provisioning and deployments.
• Coordinate AWS security assessments and penetration testing, driving remediation.
• Provide security guidance for architecture and new services, ensuring best-practice implementation.
• Be available during working hours: 10:00–19:00 UA Time (09:00–18:00 CET).
  
   

What You Will Bring…

• 7+ years in Infrastructure Security, Cloud Security, or Cloud Engineering roles.
• Deep expertise in AWS security services (IAM, VPC, Control Tower, Security Groups, GuardDuty, Config, KMS, WAF).
• Hands-on with Infrastructure-as-Code security (Terraform, CloudFormation) and CI/CD pipeline hardening.
• Solid understanding of AWS network architecture and secure networking practices.
• Skilled in monitoring, logging, and incident response in cloud environments.
• Knowledge of cloud compliance frameworks (ISO 27001, SOC 2, CIS Benchmarks).
• Experienced in threat modeling, vulnerability management, and remediation.
• Practical implementation of zero-trust and least-privilege principles.
• Conduct security reviews of architecture and configurations.

Why You’ll Love It Here

👫 Work with a Supportive, High-Performing Team – We believe in trust, autonomy, and working with bright, passionate individuals who drive real impact.

🌍 A Truly International Workplace – Our diverse and inclusive team ensures you’ll always feel connected and supported, no matter where you are.

🚀 Shape the Future of Global Communication – Be part of a team transforming how businesses operate in an era of remote work and AI-powered collaboration.

💼 Join a Profitable & Stable Company – We’re not a startup experiment, we’re a two decade old success story with sustained profitability, meaning we can back your boldest ideas.

What We Offer

🏖️ Generous Time Off – Take the breaks you need to relax, recharge, and come back inspired.

💻 Top-Tier Tech – Love Mac? So do we! We equip our team with the best tools for success.

🚀 Career Growth & Development – We cover certifications and IT conferences to keep you at the top of your game.

🌱 Well-being Support – We offer access to psychology sessions to support your mental and emotional health

Happy with them? Our Benefits are country-specific. You can ask your recruiter for more information

Interview Process

🤝 Step 1: Initial Screening – A chat with our Talent Team to understand your background, experience, and motivations (30 mins).

🛠️ Step 2: Technical Interview – A deep dive with your potential manager to assess your skills and fit for the role (60 mins).

We Are Wildix

Wildix is an equal-opportunity employer. We value diversity and welcome all applicants regardless of race, gender, age, religion, or any other characteristic. Everyone is encouraged to apply and is welcome to join our Blue Ecosystem. 

Ready to join us? Apply Now!

Our partners are looking for a strategic BI Lead to bridge the gap between complex data and actionable business growth. You will spearhead the analytics stream, transforming raw traffic and player data into a clear roadmap for product and marketing optimization.

Responsibilities:

• Develop and Execute Analytics Roadmap: Lead the BI strategy focused on acquisition, player behavior, and product performance;
• Ensure End-to-End Visibility: Build and maintain full-funnel transparency, linking initial traffic sources to gameplay patterns and final monetization;
• Optimize Performance: Analyze affiliate quality, conversion funnels, and player LTV to identify growth levers and eliminate inefficiencies;
• Drive Product Insights: Evaluate player engagement and retention trends to provide data-driven recommendations for UX and revenue enhancements;
• Manage Experimentation: Design and analyze A/B tests for onboarding flows, bonus mechanics, and new features;
• Lead and Mentor the Team: Manage and grow a team of analysts, establishing high standards for data storytelling and technical deliverables;
• Oversee Data Governance: Collaborate with DWH teams to align KPIs, standardize definitions, and ensure absolute data integrity across all platforms.

Requirements:

• 3+ years of experience in Data Analytics, including at least 2+ years specifically within the iGaming industry;
• 1+ year of proven experience in a leadership or mentoring role (Lead / Head of / Senior);
• Deep domain expertise: Mastery of iGaming-specific metrics (GGR/NGR, FTDs, LTV, Retention, and Churn);
• Expert-level SQL (PostgreSQL / BigQuery);
• Proficiency in Python (Pandas, NumPy) for advanced modeling and data manipulation;
• Hands-on experience with BI Tools: Tableau, Apache Superset, or Looker Studio;
• Product and Business Mindset: Ability to translate technical data into strategic business recommendations;
• Excellent communication skills to bridge the gap between technical teams and stakeholders.

Technical Stack:

• SQL: PostgreSQL / BigQuery;
• Python: Pandas, NumPy;
• BI: Tableau / Apache Superset / Looker Studio.

Benefits:

• Medical insurance;
• Regular salary reviews and timely payments;
• Provision of necessary equipment for work as needed;
• Corporate English classes;
• 50% reimbursement for courses/certifications/webinars;
• Development towards senior leadership positions within the company;
• Ability to work fully remotely;
• 20 days of vacation and paid sick leave;
• Informal online/offline events every month.

We are supporting a large-scale digital banking transformation programme and are looking for an experienced Solutions Architect to lead the architecture of modern mobile and omnichannel banking platforms.

Location

We are primarily considering candidates based in:

• Spain
• Portugal
• Eastern Europe

Key Responsibilities

• Define and lead the solution architecture for digital banking platforms, including mobile and omnichannel services
• Produce and maintain High-Level Design (HLD) and Low-Level Design (LLD) documentation
• Design and guide microservices-based architectures for scalable, high-availability systems
• Work closely with engineering teams to ensure architectural designs are properly implemented
• Collaborate with product, security, and infrastructure teams to align architecture with functional and non-functional requirements
• Ensure solutions comply with Open Banking standards, banking security practices, and regulatory requirements
• Support API-driven architectures and integrations across digital banking ecosystems
• Communicate architectural decisions clearly to technical and non-technical stakeholders
• Contribute to architecture governance within a multi-vendor enterprise programme

Requirements

• 15+ years of experience in IT, including 7+ years as a Solutions Architect
• Strong experience designing architectures for digital banking platforms (mobile or omnichannel preferred)
• Proven expertise in microservices architecture
• Experience with Java-based backend ecosystems
• Familiarity with React-based digital platforms
• Hands-on experience with Microsoft Azure cloud architecture
• Knowledge of Open Banking frameworks and banking application security
• Experience designing high-performance, high-availability distributed systems
• Ability to produce clear HLD and LLD architecture documentation
• Experience using architecture modeling tools such as UML, Draw.io, or PlantUML
• Strong stakeholder management and collaboration skills
• English level C1 or higher

Nice to Have

• Experience working on large-scale digital banking transformation programmes
• Experience supporting mobile banking platforms
• Strong background in API-first architecture within financial services

Working Model

• First month: On-site in Dublin, Ireland, to collaborate with key stakeholders and align on the architectural foundations of the programme.
• After the initial month: The role will transition to fully remote work.

All travel and accommodation for the Dublin visit will be fully arranged and covered by the company.

Backend AI Engineer

[Freelance, Full-time, Remote]

SNEAK PEEK

⇨ Location: Remote, GMT+0/+4

⇨ Interview process: HR Interview ⇨ Technical interview ⇨ Take-home challenge ⇨ Presentation of home challenge 

WHO ARE WE? 

At Rounds, we believe in harnessing the power of cutting-edge technology to drive business success. Our transformative, machine-learning technology identifies and optimizes mobile assets, while our team of experts, with their unparalleled human capital and business acumen, provides the strategic direction and support to turn mobile assets into profitable businesses. Together, we are revolutionizing the mobile industry. You can find out more info about us here: www.rounds.com.

THE ROLE

We’re looking for a passionate AI engineer to join our dynamic AI Innovation Team, which is the driving force behind technological advancement in our company. Here, you will use cutting-edge AI technologies to boost productivity and make extraordinary ideas a reality.

We're excited to meet someone who is AI-obsessed, has a strong sense of product ownership, is ready to take initiative and who is full of creative ideas. If this sounds like you, we want you to join our team!

Hiring manager: Alik Hochner - CTO, Ori Nahum - AI Innovation Team Lead 

KEY RESPONSIBILITIES

• Develop and maintain high-quality AI solutions for both internal teams and external users.
• Architect sophisticated AI agents, including multi-agent systems.
• Design and implement evaluation frameworks to assess AI performance, accuracy, and reliability.
• Collaborate across diverse teams to boost developer productivity.
• Continuously explore the evolving AI landscape and identify impactful tools for company growth.
• Shape the company’s best practices and guidelines for AI usage.

WHAT ARE WE LOOKING FOR?

Must-have:

• 5+ years experience in software development (preferably in Python or TypeScript).
• Skilled in prompt engineering and have a strong understanding of how LLMs work internally.
• Proven track record in developing AI agents from scratch and implementing effective AI solutions for businesses.
• Basic DevOps proficiency (CI/CD, Cloud).
• Quick learner who adapts effortlessly to new tools and approaches.
• Passionate and knowledgeable about current AI trends and best practices.
• Excellent English communication skills.

HOW DO WE WORK?

We are a distributed team of more than 150 people, all working remotely and communicating partially synchronously (we usually overlap with our teams for 5 hours daily and are free to work on some of the tasks whenever it suits us best). We value open communication, proactivity and work/life balance and we measure our freelancers on performance, rather than on the time spent on the job.

WHAT’S IN IT FOR YOU? 

• 100% remote work model
• Flexible full-time working hours 

INTERESTED?

Our recruitment process consists of the following steps: 

• HR interview with the recruitment manager: 45 min
• Technical interview with the AI Engineer Tech Lead: 1 hour
• Take-home challenge: ~ 4 hours of work
• Final Interview and Take-home challenge presentation with CTO and AI Engineer Tech Lead: 1 hour

Full Stack Developer

[Full-time, Remote, Freelancer]

SNEAK PEEK 

⇨ Location: Remote, GMT+0/GMT+4

⇨ Interview process: HR interview ⇨ technical interview ⇨ take-home challenge ⇨ final interview ⇨ offer 

WHO ARE WE? 

At Rounds, we believe in harnessing the power of cutting-edge technology to drive business success. Our transformative, machine-learning technology identifies and optimizes mobile assets, while our team of experts, with their unparalleled human capital and business acumen, provides the strategic direction and support to turn mobile assets into profitable businesses. Together, we are revolutionizing the mobile industry. 

THE ROLE

We are looking for an experienced Full-Stack developer with a passion for building complex systems to further expand our set of internal tools. You will architect and develop our core internal systems, understand and predict user interactions, and create well-written code, based on the business needs. You will work closely with other developers and QA testers, using the Agile methodology and a quality-first approach.

Hiring manager: Nadav Nagel, Software Team Lead 

WHAT ARE WE LOOKING FOR?

• 5+ years of commercial experience building publicly available websites
• 3+ years of experience in backend development using Typescript and Node.js
• Up-to-date with at least one of the latest UI frameworks (React, Vue.js, etc.)
• Detail-oriented and able to adhere to deadlines
• Excellent communication skills in both written and verbal English

INTERESTED?

Our recruitment process consists of the following steps: 

• HR interview: 30 min
• Take-home challenge.
• Technical interview: 60 min
• Final interview

Backend Engineer

[Freelance, Full-time, Remote]

SNEAK PEEK

⇨ Location: Remote, GMT+0/GMT+4

⇨ Interview process: HR interview + take-home challenge ⇨ technical discussion ⇨ final interview

WHO ARE WE? 

At Rounds, we believe in harnessing the power of cutting-edge technology to drive business success. Our transformative, AI technology identifies and optimizes mobile assets, while our team of experts, with their unparalleled human capital and business acumen, provides the strategic direction and support to turn mobile assets into profitable businesses. Together, we are revolutionizing the mobile industry. 

THE ROLE

This is a hybrid Backend/Platform Engineering role to lead cloud and backend systems migrations. It involves shipping backend solutions that move the needle at the scale of millions of dollars in business impact.

You will evaluate, plan, and migrate backend systems from various stacks and cloud providers (AWS, Azure, GCP, and more) into our infrastructure. By leveraging AI tools and automation, you will significantly accelerate migrations and modernization efforts.

This role suits Backend Engineers who aren't afraid to jump in and shape the DevOps stack.

Responsibilities

• Architect, evolve, and oversee backend infrastructure transformations (NodeJS, Python and more).
• Assess complexity, outline risks, and estimate effort and timelines.
• Rebuild or refactor backend/cloud components when needed, including rewriting services (with AI assistance).
• Utilize AI tools and agents to speed up research, refactoring, documentation, and investigations (Claude, Cursor and more).
• Design and maintain cloud environments using Infrastructure as Code (Terraform preferred) mainly for GCP, AWS and Azure.
• Build, maintain, and improve CI/CD pipelines.

Hiring manager: Igor Yakunin 

WHAT ARE WE LOOKING FOR?

Must-have:

• 5+ years Backend Engineering.
• Hands-on experience with GCP or strong AWS/Azure background and willingness to transition.
• Practical experience with Terraform (or similar IaC).
• Strong Linux, networking, and cloud fundamentals.
• Experience with Docker and containerized deployments.
• Proficiency in at least one backend language (Python, Node.js, Go, Java, etc.).
• Experience with SQL and/or NoSQL databases.

Nice-to-have:

• Experience with Kubernetes or other orchestration tools.
• Familiarity with CI/CD platforms such as CircleCI, GitHub Actions, GitLab CI, or ArgoCD.
• Experience with reverse-engineering unknown systems or digging through legacy setups.
• Experience with monitoring tools such as Datadog, Prometheus, or GCP Monitoring.
• Background in refactoring, rewriting, or modernizing backend services.

INTERESTED?

Our recruitment process consists of the following steps: 

• HR Interview (45 min) - Discuss your background and fit.
• Take-Home Challenge (~2 hours of work) - Practical assignment reflecting real work.
• Technical Interview (60 min) - Evaluate cloud, DevOps, and coding skills.
• Final Interview (60 min) 

Get in touch at hr@rounds.com. 

We look forward to hearing from you! 

Playson 🤘 is a leading online gaming supplier founded in 2012 that has developed worldwide recognition in the industry.

Our promotional features team is seeking a Senior Backend Engineer with a strong background in Node.js. This role is focused on developing and optimizing promotional features for our gaming platforms, where performance, scalability, and cutting-edge solutions are paramount.
If you’re a product-passionate person, your mind is keen to solve deep tech engineering problems, and you have a fast “PoC first” approach with a deep sense of ownership, we would love to hear from you.

To succeed in the role, you will have:

• A degree in Computer Science or related field
• Strong development experience in Node.js/TypeScript 5+ years
• Strong understanding of Async approaches
• Experience with Messaging systems like Kafka, RabbitMQ
• Experience in distributed systems
• Experience with RDBMs (MySQL, PostgreSQL etc.), CDBMs (Redshift, ClickHouse etc.), NoSQL (DynamoDB, MongoDB, etc)
• Experience in writing e2e & unit tests
• Experience with development production-ready solutions
• Hands-on product experience with Kubernetes

Would be beneficial to know:

• Understanding of enterprise development patterns
• Experienced with large-scale microservices architecture
• Experience with cloud providers (AWS, GCP, etc.)
• Active performance observation
• Gambling domain experience
• Understanding of application security and industry standards, its best practices

What will you be doing?

• Develop and maintain robust backend systems for our promotional features.
• Optimize existing systems for enhanced performance and scalability.
• Lead technical decisions and contribute to our SaaS solutions.
• Collaborate with distributed teams to innovate and implement new features.
• Ensure code and architectural excellence through reviews.
• Address complex technical challenges with innovative solutions.

What you get in return:

• Competitive Salary: We offer a competitive salary in EUR, subject to annual performance reviews
• Quarterly Bonuses: Benefit from a transparent and systematic quarterly bonus system
• Flexible Schedule: We offer a flexible work schedule to accommodate your needs
• Remote Work Option: Choose to work remotely, providing greater flexibility and comfort
• Medical Insurance: Receive comprehensive medical insurance for both you and a significant other
• Financial Support for Life Events: We provide financial support during special life events
• Unlimited Paid Vacation: Enjoy unlimited paid vacation leave
• Unlimited Paid Sick Leave: Take unlimited paid sick leave whenever necessary
• Professional Development: Get reimbursement for professional development courses and training

Join us today!

For our partner, we are looking for a Head of Sales Operations & Quality (Web3 / FinTech) 

Who They Are: 

The company is a fully confidential cryptocurrency wallet designed for businesses. They help companies operate with crypto securely, efficiently, and privately. Their team is building a product that combines cutting-edge technology, high security standards, and a seamless user experience.

They don’t need a simple "sales administrator." They need a system architect who will build an environment where the sales team thrives and closing high-value deals becomes an inevitable result of the process.

The candidate won’t be closing deals personally — they will be building the engine that makes sales seamless, scalable, and data-driven. They are scaling their next-gen crypto-processing infrastructure, and the mission is to ensure the sales force operates with surgical precision.
 

Your scope of responsibility:

• Design and implement a world-class onboarding system. The goal is to drastically reduce the "Time-to-ramp" for new team members.
• Monitor calls, chats, and negotiations to directly influence and improve the quality of client interactions.
• Master HubSpot. Optimize the funnel, automate routine tasks, and maintain data hygiene to ensure total pipeline transparency.
• Lead workshops on value-based selling and the specifics of the Web3 market. You don’t just point out mistakes; you provide the tools to fix them.
• Monitor CAC, LTV, and conversion rates at every stage. You provide the CBDO with a "health report" of the department through clear, actionable dashboards.
   

Who they’re looking for:

• 5+ years in Sales Ops, Enablement, or Quality Management within FinTech, Banking, or Crypto.
• You understand the crypto-landscape (custody, liquidity, compliance) and don’t need a dictionary to explain what a fiat on-ramp is.
• A track record of mentoring teams. You know how to turn a newcomer into a top-performer through structured coaching.
• You live by metrics. You don’t "feel" the team is doing well — you know it because the data says so.
• You hate chaos. When you see a bottleneck, your first instinct is to build a system to automate or eliminate the problem.
   

Why Join Them:

• Join a global FinTech product that’s truly reshaping the market landscape.
• Work with smart minds on complex challenges — they’re not “playing startup,” they’re building the infrastructure of the future.
• Be part of a team free from toxicity — only open dialogue, mutual respect, and real professionalism.
• Receive fair compensation — clear structure, results-driven rewards, and flexible reviews.
• Grow with them — clear goals, transparent career paths, no unnecessary bureaucracy.
• Enjoy support — English classes, continuous learning, gym benefits, and family bonuses.
• Key specialists get relocation support to Cyprus.
• Fast-tracked application process — because time matters.
   

Smart people. Big challenges. A business that builds the industry.

We are seeking a hands-on Tech Lead / Solution Architect to shape and scale our next-generation iGaming platform. This role blends deep technical expertise, architectural design, and leadership skills to ensure our systems meet the demands of high-volume, real-time, and regulated environments.

Requirements:

• Proven experience in building Monolithic, Microservices, and Event-driven architectures, including decomposition of legacy systems into scalable microservices.
• Designing and implementing high availability (HA), fault-tolerant, and load-balanced solutions for large-scale, high-traffic applications.
• Orchestration Engines: Hands-on experience with workflow orchestration platforms (e.g., Camunda, Temporal) for process automation and distributed workflows.
• Strong expertise in designing scalable database schemas and managing both relational (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis) systems with focus on performance optimization and horizontal scaling, Rabbit, Kafka.
• Knowledge of VMware-based infrastructure as well as modern container orchestration platforms (Docker, Kubernetes). Nice to have: Apache Spark, Hadoop.
• Building robust CI/CD pipelines using GitLab CI/CD, enabling continuous delivery and deployment across complex environments.
• Practical development skills in PHP (Laravel, Laravel Octane), Node.js, JavaScript, Next.js, React. 
• Setup and integration of monitoring/alerting systems (Prometheus, Grafana, Kibana, ELK Stack, Sentry) for proactive issue detection and performance analysis.
• Deep understanding of automation-first approaches, infrastructure as code, and collaboration between development and operations.
• Proven ability to lead teams, mentor engineers, and align technical decisions with business goals. Skilled at translating business requirements into efficient technical solutions.
• Experience in using AI technologies

Nice to Have:

• Experience analyzing technical risks and defining mitigation strategies.
• Expertise in building PoC (Proof of Concept) and MVP (Minimum Viable Product) to validate business ideas quickly.
• Familiarity with architectural modeling tools (Lucidchart, Draw.io, C4 Model).
• Experience in multi-region deployments and scaling distributed systems across hybrid environments (cloud + on-premise VMware setups).
• Background in designing mission-critical financial, e-commerce, or enterprise-grade systems with strict SLAs and compliance requirements.

Responsibilities:

• Evaluation and clarification of incoming functional business requirements from customers and business analytics in specification format;
• Creation of technical specifications following functional business requirements;
• Building of services and infrastructure architecture according to technical specifications;
• Control of compliance of new solutions to the general architecture;
• Technical risks evaluation for services performance and infrastructure, and potential solutions development for mitigation;
• Services and infrastructure evolving and optimization;
• Performance, security, and stress testing planning and supervision found vulnerabilities and issues resolving;
• Architecture and technical solutions presentation and discussion with technical Leads and members;
• Supervision of technical solutions compliance to project requirements;
• Maintenance of technical documentation and development regulations;
• Requirements analysis, technical design, scope decomposition, and estimation with the technical teams;
• New projects and services of the company evaluation for compliance with the existing regulations and methodologies;
• Mentor development team members and Senior technical staff in the architecture area;
• Establishment and development of new technological practices for the company.

What we offer:

• Competitive salary;
• Remote work in a flexible environment;
• 20 working days of paid vacation and education projects;
• Great product with our software solution;
• Opportunity for growth at professional levels, attending top industry events and conferences, and international workshops at our competence centers.
• English classes.

We are looking for an experienced Embedded Engineer to join a long-term project focused on the development of a high-end Software Defined Radio (SDR) product that has already entered commercial production and is being sold in hundreds of units. The candidate must have a strong RF orientation, preferably with hands-on experience in Software Defined Radio (SDR).

The product is a complex embedded system combining RF, FPGA, NXP processors, and high-performance networking components. You will work on core system software responsible for real-time data processing, control planes, and high-speed data paths.

This is a long-term project with no location restrictions — candidates from Ukraine and other regions are welcome.

Responsibilities

• Design and develop embedded software for an SDR platform based on NXP processors
• Implement user-space and kernel-space software components
• Build and maintain high-speed data paths inside the SDR and between external devices (PC, cloud)
• Develop and operate control planes (internal SDR logic and external integrations)
• Work on real-time software with strict performance and latency requirements
• Implement data processing pipelines using UDP/TCP/DPDK
• Ensure secure data handling (VPNs, encryption, ciphering activation)
• Collaborate within a system that includes FPGA-based processing (FPGA coding not required)
• Debug complex real-time and high-performance systems
• Participate in system-level design and optimization

Requirements

• Strong experience with embedded Linux and NXP processors
• Solid understanding of real-time software development and highly efficient C/C++ code
• Deep knowledge of networking protocols and data transport
• Hands-on experience with DPDK, UDP/TCP, and high-throughput networking
• Experience working with complex embedded systems and real-time processing
• Strong debugging skills in real-time and low-level environments
• Proficiency in C / C++, with working knowledge of Python
• Understanding of software lifecycle management, including:
  • Secure software images
  • Field-deployed software upgrades
  • Monitoring and maintenance
• Good level of English for technical communication

Nice to Have

• Knowledge of RF systems and RF signals
• Understanding of time synchronization technologies (GNSS, IEEE 1588, clock synchronization)
• Experience with security-related networking features

We are seeking a highly technical Machine Learning Engineer to work onsite with a client team in Kyiv, supporting multiple customers and delivering production-grade ML solutions.

This role has a strong emphasis on ML Ops, model deployment, and computer vision, with additional exposure to Palantir Foundry (pipelines and UI). The successful candidate will be comfortable working independently in environments with uncertain or evolving requirements, while collaborating closely with both onsite and remote teams.

Key Responsibilities:
 

• Design, develop, train, fine-tune, and deploy machine learning models into production environments.
• Build and maintain ML Ops pipelines, including model versioning, deployment, monitoring, and retraining.
• Develop and support computer vision solutions for real-world business use cases.
• Work with structured and unstructured data to deliver scalable ML solutions from PoC → MVP → Production.
• Use Docker to containerize ML workloads and ensure portability and reproducibility.
• Contribute to and maintain Palantir Foundry pipelines and UI components (prior experience strongly preferred; training can be provided).
• Collaborate with cross-functional teams (engineering, product, client stakeholders) both onsite and remotely.
• Clearly communicate technical approaches, trade-offs, and results to non-technical stakeholders.
• Proactively drive progress and decision-making, even when requirements are ambiguous.
• Analyze data to find patterns and create machine learning solutions for challenging business issues
• Understand the AI/ML program journey to formulate relevant high impact business questions that can be answered through data analysis.
   

Required Skills & Experience:
 

• 3+ years of hands-on experience in Machine Learning, including model training, fine-tuning, and deployment, production ML systems
• Strong experience with Docker for ML workloads.
• Proficient with ML Ops concepts (CI/CD for ML, model lifecycle management, monitoring).
• Hands-on experience with PyTorch, TensorFlow, Keras, advanced Python skills (NumPy, Pandas, Scikit-learn, etc.).
• Experience working with cloud platforms (AWS, Azure, or similar).
• Familiarity with SQL for data analysis.
• Ability to work independently and take ownership of delivery.
• Fluency in English (spoken and written).
• Strong interpersonal skills with the ability to translate client requests into technical solutions and explain complex ML topics succinctly to technical and non-technical audiences

Strongly Preferred / Nice to Have:
 

• Prior experience with Palantir Foundry:Data pipelines, Foundry applications / UI
• Experience with computer vision use cases.
• Experience working in agile delivery environments.