Jobs at Djinni

Are you a Senior Backend Engineer passionate about building scalable AI-driven systems? 

Join us at Sigma Software to work on a cutting-edge platform that transforms how large-scale engineering organizations manage and analyze complex technical data.
This is a remote position with flexible locations across Europe, Ukraine, and LATAM. You will be part of an innovative team leveraging AI, semantic graphs, and distributed processing to deliver impactful solutions.
At Sigma Software, we value expertise, creativity, and collaboration. Why join us? You will work with advanced technologies, contribute to mission-critical projects, and be part of a company recognized for excellence and innovation.

CUSTOMER
Our customer operates in the AdTech industry, delivering advanced technology solutions that optimize advertising performance and audience targeting. While the name is confidential, the organization is known for leveraging cutting-edge AI and data-driven strategies to enhance campaign effectiveness and deliver measurable business impact.

PROJECT
We are developing a next-generation AI-powered Knowledge Base and Gap Analysis platform for SysML-based engineering environments. The system enables large-scale engineering organizations to ingest, structure, analyze, and reason over complex MBSE artifacts and technical documentation. It supports both cloud and secure classified environments, improving traceability, identifying gaps, and enhancing decision-making in mission-critical projects.

Responsibilities

• Design and develop scalable AI-powered backend systems for SysML-based engineering environments
• Build and maintain distributed data ingestion and ETL pipelines for large-scale engineering artifacts and technical documentation
• Develop and optimize LLM-powered workflows for metadata extraction, semantic analysis, and entity resolution
• Implement AI agents and multi-agent orchestration workflows
• Design and improve RAG-based architectures and semantic retrieval pipelines
• Develop graph-based knowledge representation and traceability analysis solutions
• Work with graph databases, graph processing libraries, and semantic relationship modeling
• Build and optimize distributed data processing workflows using Apache Spark
• Collaborate with cross-functional engineering teams to integrate AI capabilities into platform services
• Design scalable and high-performance APIs and backend services
• Improve system reliability, scalability, observability, and performance across distributed environments
• Participate in architecture discussions and technical decision-making processes
• Contribute to cloud-native infrastructure and deployment workflows
• Support deployments in secure, air-gapped, or classified environments when required
• Create and maintain technical documentation and engineering best practices

Qualifications

• At least 5 years of commercial experience in software engineering, Data Engineering, or AI systems development
• Experience with Python
• Hands-on experience building distributed and scalable systems
• Practical experience with LLM-based applications and AI integrations
• Experience building AI agents and multi-agent systems
• Strong understanding of RAG architectures and semantic retrieval workflows
• Hands-on experience with graph technologies, graph libraries, or graph databases
• Experience with Apache Spark and distributed data processing
• Strong understanding of ETL pipelines and large-scale data ingestion workflows
• Experience with cloud-native infrastructure and distributed environments
• Practical experience with backend platform development and API integrations
• Good understanding of semantic search, entity resolution, and metadata extraction
• Experience working with highly scalable and high-performance systems
• Strong problem-solving and communication skills
• Upper-Intermediate level of English

WILL BE A PLUS

• Background in Data Engineering
• Experience with  distributed data processing, Apache Spark, or Apache Beam
• Experience with Knowledge Graphs and graph-based semantic modeling
• Familiarity with MBSE or SysML environments
• Experience supporting air-gapped or classified environments
• Experience with vector databases and embedding pipelines
• Experience with Kubernetes and cloud platforms such as AWS, GCP, or Azure

Additional information

PERSONAL PROFILE

• Analytical mindset with strong problem-solving skills
• Ability to work independently and in a distributed team
• Adaptability to secure and classified environments
• Strong communication and collaboration abilities
• Passion for AI-driven engineering solutions

Are you passionate about building scalable, reliable data systems that power real-world solutions? We are looking for a Senior Data Engineer to join our team and work remotely from Europe, Ukraine, or LATAM.

At Sigma Software, we partner with innovative companies to deliver cutting-edge technology solutions. This role offers the opportunity to design and operate a canonical data platform that integrates diverse external data sources, ensuring high quality and flexibility.

Why join us? You’ll work with modern technologies, collaborate with talented professionals across multiple regions, and have the freedom to experiment and innovate while contributing to impactful projects in the AdTech domain.

Customer

Our client is a fast-growing AdTech company focused on solving real-world challenges in digital advertising and data-driven marketing. They specialize in building highly resilient and scalable systems that encourage experimentation and innovation. Their data platform is designed to be both powerful and flexible, enabling engineers to introduce new ideas and leverage the latest technologies to optimize advertising performance and audience insights.

Project

The project involves developing and maintaining a canonical data platform that integrates multiple external data sources. It supports both full data loads and incremental updates, ensures high data quality, and leverages AI-assisted tools for monitoring and issue detection.

Key Technologies: Java, Scala, Apache Beam/Apache Spark, SQL, GCP Dataflow, REST APIs, AI-assisted tools, event-driven architectures

Responsibilities

• Design, build, and maintain reliable data pipelines to ingest and process data from external systems
• Implement integrations using Java or Scala, ensuring scalability and resilience
• Handle both full data loads and incremental updates efficiently
• Collaborate with engineering and product teams to align on integration and data needs
• Develop and maintain a unified internal data model
• Ensure data quality, detect and resolve incorrect or incomplete data
• Utilize AI-assisted tools to improve data quality and operational efficiency
• Monitor and optimize data pipelines for production readiness

Requirements

• At least 5 years of experience as a Data Engineer or Backend/Data Engineer
• Strong production experience with Java or Scala
• Experience with Apache Beam or Apache Spark
• Proven experience integrating external systems via REST APIs (pagination, rate limiting, token-based authentication)
• Strong data modelling skills with structured, relational data
• Solid SQL knowledge
• Experience with GCP Dataflow
• Experience operating data pipelines in production environments
• Strong communication skills and ability to collaborate across teams
• At least an Upper Intermediate level of English

WILL BE A PLUS:

• Experience with event-driven architectures or messaging systems
• Designing canonical schemas across multiple data sources
• Experience with LLM (Large Language Models)

Personal Profile

• Proactive and detail-oriented
• Thrives in collaborative environments
• Enjoys solving complex integration challenges
• Comfortable experimenting with new technologies
• Committed to improving data systems

Company Description

Are you a seasoned engineer passionate about building scalable, high-performance systems? This Senior-level role offers the opportunity to work remotely with talented teams across Europe, Ukraine, and LATAM.

At Sigma Software, we deliver cutting-edge solutions for global customers, combining technical excellence with a service-minded approach. In this role, you will join a distributed team to architect and evolve an advanced Ads platform, contributing to both innovation and stability.

Why join us? You will work on complex, high-impact systems, collaborate with international experts, and enjoy the freedom to shape architecture and technical patterns that drive long-term success.

CUSTOMER

We partner with a leading company in the AdTech space, delivering high-performance, scalable solutions that empower advertisers to manage campaigns, optimize targeting, and analyze results in real time. The Customer values innovation, reliability, and long-term collaboration, and operates globally with distributed teams in Europe, LATAM, and other regions.

PROJECT

The project focuses on building and evolving core systems for an advanced Ads platform integrated into a product for the interior decor industry. This product enables users to preview and visualize home items before purchase, enhancing shopping experiences both online and in-store.

Job Description

• Design, develop, and maintain APIs and services supporting ad campaign management, targeting, delivery, attribution, and reporting
• Architect scalable, reliable, and high-performance distributed systems
• Optimize systems for high-throughput and low-latency event/data processing
• Drive architectural decisions and establish development patterns
• Collaborate with distributed teams to ensure seamless integration and delivery
• Mentor and guide other engineers, fostering technical excellence

• Ensure code quality, maintainability, and alignment with long-term product goals

   

Qualifications

• At least 5 years of commercial experience in building scalable, high-performance systems
• Hands-on experience with AdTech solutions such as DSP, SSP, ad exchange, prebid, Google Ad Manager, or openRTB
• Strong proficiency in Python, preferably with the Django framework
• Solid knowledge of computer science fundamentals, including data structures, algorithms, and distributed systems
• Good understanding of distributed system architecture with a focus on data availability, reliability, and performance
• Practical experience with Kubernetes, PostgreSQL, and AWS

• Upper-Intermediate level of English

   

WILL BE A PLUS

• Experience with dbt and Redshift

• Familiarity with interior decor industry solutions

   

Additional Information

PERSONAL PROFILE

• Attention to detail and quality
• Excellent communication skills
• Leadership mindset, proactiveness

Who we are

Adaptiq is a technology hub that helps fast-growing product companies build, scale, and support strong R&D teams across different industries.
 

About the Product

We are developing an AI-first maritime intelligence platform that combines multiple global maritime data sources into one operational view. The product creates a digital twin of worldwide maritime activity and uses behavioral analytics, predictive AI models, and advanced data processing to detect risks such as smuggling, illegal fishing, container threats, and other compliance or security issues.

The platform is used by commercial, regulatory, and government customers, operating at global scale and processing millions of events along with terabytes of geospatial data every day. It is built on cloud infrastructure, microservices, and close integration with research and data science prototypes.
 

About the Role

As a Senior Backend Python Engineer, you will join an autonomous team focused on building and scaling agentic, AI-first workflows within a production-grade maritime intelligence platform.

You will be responsible for designing, delivering, and operating backend services that support generative AI agents at scale. The role involves influencing architecture, improving AI-SDLC practices, and helping shape agent-based automation used in real-world defense, regulatory, and enterprise scenarios.
 

Key Responsibilities

• Design and develop scalable Python-based microservices for agentic workflows, data pipelines, and distributed systems.
• Contribute to frontend development with React when needed.
• Integrate generative AI capabilities into production systems, including LLM APIs, RAG pipelines, and autonomous agents.
• Build operational practices and observability for AI components, including monitoring for model drift, hallucinations, and performance metrics.
• Implement and improve AI-SDLC standards, including code reviews, automated testing, CI/CD pipelines, and trace-based quality evaluation.
• Design and maintain infrastructure as code using Terraform, Kubernetes, and AWS services.
• Improve engineering velocity and product quality through automation, tooling, and architecture improvements.
• Mentor engineers on AI frameworks, developer tools, and best practices for high-scale agentic development.
• Work closely with product and research teams to turn user needs into reliable, secure, and scalable backend services.
   

Required Skills and Experience

• 7+ years of professional backend engineering experience.
• At least 2 years of experience building agentic or autonomous AI workflows in production.
• Strong hands-on experience with Python.
• Practical experience with agentic frameworks such as LangChain, LangGraph, DeepAgents, CrewAI, OpenClaw, Hermes, or similar.
• Proven experience designing scalable, event-driven architectures on AWS.
• Experience with messaging systems such as SQS/SNS and SQL/NoSQL databases.
• Strong understanding of GraphQL or REST API design.
• Solid DevOps background, including CI/CD, Kubernetes, and Terraform.
• Experience with production-grade security, monitoring, and incident response for mission-critical systems.
• Strong communication skills, autonomy, ownership, and ability to work in fast-paced, ambiguous environments.
   

Nice to Have

• Experience with React.js or full-stack development.
• Familiarity with vector databases and similarity search for AI applications.
   

Why Us

• 20 vacation days per calendar year, plus official national holidays in the country where you are based.
• Full accounting and legal support in all countries where we operate.
• Fully remote work model.
• Powerful workstation provided.
• Co-working space support if needed.
• Competitive compensation package with annual performance and salary reviews.

Requirements:

• Strong backend development experience with C++ (the bulk of the backend is built on a custom in-house framework)
• Hands-on experience with AWS, particularly S3
• Proficiency with Protobuf
• Experience deploying and operating services on Kubernetes, including performance-driven traffic routing to pods
• Performance engineering skills — hash-based routing, SSD-based caching, and memory-mapped files
• Solid systems / low-level fundamentals (there is no off-the-shelf framework to rely on — much of the stack is custom)
• Ability to work highly autonomously and drive work forward with minimal supervision
• Strong communication skills and experience working in distributed teams (Europe/Ukraine time zone; ~1–2 hours of daily overlap with a US-based team)
• Hands-on experience with AI-assisted development tools — e.g. Claude Code and Codex — including AI skills, plugins, and MCP (Model Context Protocol), with a clear understanding of how to boost personal productivity and code quality using AI tooling

Nice-to-Have:

• Familiarity with OpenTelemetry / observability tooling
• Understanding of LevelDB SSTable concepts and sorted, time-keyed data structures
• Familiarity with Python (used only for a small metadata/auth service)
• Basic DevOps skills

Key Responsibilities:

• Optimize the performance of the C++ data-streaming backend — efficient delivery of large recorded datasets to the browser
• Work on infrastructure-level optimizations: traffic routing to Kubernetes pods, hash-based routing, SSD-based caching, and memory-mapped files
• Operate within a custom data-handling stack — a C++ framework, a custom HTTP server, and a proprietary data format built on top of LevelDB SSTables and Protobuf
• Take ownership of performance work end-to-end, proactively identifying bottlenecks and driving solutions independently
• Collaborate with a primarily US-based team with ~1–2 hours of daily overlap, while working largely independently
• Participate in code reviews and design discussions

About the Project:

You'll join the engineering team of a leading technology company building autonomous mobility and robotics systems. The team develops an internal data visualization platform — a "video and data player" that renders 3D scenes, lidar, and audio recorded by autonomous vehicles. This role sits on the performance work stream: the backend reads on-vehicle data stored in S3, deserializes it from a custom, time-keyed format, and streams it to the browser. The data-transfer service is implemented in C++, and most of the platform's performance gains are expected to come from the backend.

This is a long-term engagement for a strong systems engineer who enjoys low-level performance work and is comfortable ramping on a heavily custom stack with high ownership and minimal supervision.

24Hit is a product game dev company from Ukraine (Kyiv) that has been developing and publishing mobile games since 2019. 

We launched dozens of popular games and gained over 100 million satisfied players worldwide. 

As a Diia City resident, we offer employee reservation starting from the first day of employment (for men).

We are currently looking for a Recruiter to share our core company values:

• Creativity: We actively encourage and embrace each other’s ideas, transforming them into reality through collaboration and innovative thinking.
• Integrity: We commit to providing honest feedback and realistically assessing situations, fostering a culture of trust and transparency.
• Productivity: We strive to optimize our workflows to achieve the best possible results in the shortest timeframe, ensuring efficiency and effectiveness in our operations.
• Uncompromising Quality: Our commitment to excellence drives us to prioritize the quality of our work above all else, ensuring that we consistently deliver outstanding results.
• Healthy Lifestyle: We advocate for a healthy lifestyle and stand against harmful habits, promoting well-being and balance within our team.

The role requires:

• Full-time job;
• Office-based in Kyiv.

Main responsibilities:

• Actively participating in closing vacancies (Game dev);
• Sourcing candidates across various platforms;
• Reviewing resumes and conducting interviews;
• Building and maintaining communication with candidates;
• Managing the candidate database in a CRM system;

Our ideal candidate:

• Experienced in recruiting;
• Strong verbal and written communication skills in Ukrainian;
• English proficiency at Intermediate level or higher;
• Attention to detail and responsibility;
• Passion for games!

Would Be a Plus:

• Experience in recruiting and sourcing in Game dev industry.

   

Why join our team?

• Professional Team: A high-performing group of skilled individuals committed to excellence.
• No Overtime: We prioritize a healthy work-life balance, with no overtime required.
• Stable Payments: No payment delays since the foundation of the company.
• Bonus System: A unique reward system designed to motivate employees by aligning their performance with the company’s financial goals.
• Professional Development: Access to mentorship programs and our internal library for continuous growth.
• Fully Legal: Official employment in full compliance with Ukrainian labor legislation, including paid vacation (24 days) and sick leaves (unlimited).
• Events: Enjoy board games, masterclasses, corporate events, sports activities, and free English classes.
• Comfortable Workspace: A modern office in Kyiv featuring a spacious lounge, fully-equipped kitchen, sports zone, cinema, and complimentary spa facilities for employees.
• 35-Hour Work Week: Reduced working hours as a benefit for experienced employees.

We are an international iGaming holding building and scaling proprietary products across global markets.

Our ecosystem covers the full cycle of product development — from acquisition and affiliate marketing to CRM, analytics and operational management.
We operate with a performance-driven mindset, focusing on scalable growth and measurable results.

The company is actively expanding across Tier-1 and Tier-2 markets, offering strong professionals the opportunity to work with real budgets and make a direct impact on business performance.

🔥 About the Role

We are looking for a Growth Director who will take ownership of traffic scaling and growth strategy across CIS markets.

This role is ideal for someone who knows how to work with large budgets, test fast, scale efficiently and drive measurable growth.

You will be responsible for building and executing growth strategies, managing acquisition channels and delivering real business results.

🚀 Key Responsibilities

• Build and execute growth and acquisition strategy
• Scale traffic across multiple channels (performance, affiliate, influencer, SEO)
• Manage and optimize marketing budgets ($100k+ monthly)
• Drive product growth and revenue (GGR-focused)
• Identify and test new growth opportunities
• Analyze performance metrics (CPA, ROI, LTV, GGR)
• Collaborate with product, marketing and affiliate teams

🎯 Requirements

• 3+ years of experience in iGaming (performance / acquisition)
• Proven experience managing budgets of $100k+ per month
• Proven track record of scaling products to 1M+ GGR
• Hands-on experience with multiple traffic channels
• Strong analytical mindset and data-driven decision-making
• Experience working with CIS markets (RU, UZ — preferred)

💡 Nice to Have

• Experience working with streamers / influencers
• Understanding of SEO traffic
• Experience launching new products or GEOs
• Experience working with affiliate networks

🔥 What We Offer

✔ Work with large-scale budgets and real growth challenges
✔ Direct impact on product and revenue growth
✔ Fast decision-making environment (no бюрократии)
✔ International team and global markets
✔ Freedom to test, experiment and scale

⚡ Who You Are

• You think in numbers, not assumptions
• You are hands-on and results-driven
• You move fast and test aggressively
• You take ownership and responsibility

Location: Warsaw, Poland 
Format: Full-time
Type of contract: B2B
Department: Email Marketing
Seniority: Senior / Lead

About Us
At EPC Network, we’re not just a digital marketing company; we’re a platform for career transformation and personal growth. Our people-first approach shapes our corporate culture, fostering a team of passionate, smart, and energetic individuals who strive to grow professionally in an international, fast-paced environment.

We believe our Team is the foundation of our success, and now we’re looking for a Design Team Lead (AI Focus) to join our Email Marketing Department!

Job Description
As a Design Team Lead (AI Focus), you’ll lead the design direction for our email marketing and newsletter ecosystem, combining strong visual standards, team leadership, and AI-powered workflows.

This role is for a hands-on leader who understands design as a performance lever, not just aesthetics. You’ll own design quality, scalability, and innovation across multiple newsletters, while actively implementing AI tools to accelerate production, testing, and design optimization

You’ll work closely with Email Marketing Managers, Content, Analytics, and the Operations teams, ensuring that design decisions directly support engagement, CTR, and revenue.

🔧 Key Responsibilities

• Design Leadership & Quality
• Lead and mentor the design team within the Email Marketing Department
• Set and maintain visual, layout, and UX standards for newsletters, landing pages, and email assets
• Review, QA, and approve design outputs before launch
• Implement and scale AI tools for design generation, iteration, and optimization
• Build AI-assisted workflows for faster production of banners, visuals, layouts, and concepts
• Experiment with AI-generated creatives and optimize them based on performance data
• Own visual performance across newsletters (CTR, scroll depth, engagement signals)
• Collaborate with marketers and analysts to test layouts, formats, and visual hooks
• Ensure designs are mobile-first, clean, and conversion-oriented
• Build repeatable processes, guidelines, and design systems for scale
• Collaborate closely with email marketing, content, and growth teams
• Balance hands-on design work with team leadership and strategic oversight
  
   

📌 Requirements

• 5+ years of experience in design (web, email, or digital marketing focus)
• Proven experience leading or mentoring designers
• Strong understanding of email design, newsletter layouts, and performance-driven visuals
• Hands-on experience with design tools (Figma, Adobe Creative Suite, Canva)
• Practical experience using AI tools for design, ideation, or production
• Strong understanding of layout, hierarchy, readability, and conversion-focused design
• Ability to manage multiple streams and priorities simultaneously
• Ownership mindset, high standards for quality, and strong attention to detail
• English level: C1 or higher
  
   

📌 Nice to Have

• Experience in email marketing, newsletters, or digital publishing
• Experience with A/B testing, design experiments, or performance iteration
• Familiarity with tools like Beehiiv, ClickFunnels, or similar platforms
• Basic understanding of HTML/CSS for email layouts
  
   

🤝 What it means to be part of our Team

• Multinational and intercultural experience
• Corporate library
• A world-class team to work with
• Growth opportunities
• Cutting-edge frameworks and technologies
• Competitive salary
• Plenty of engaging team-building and social events
• Bonuses according to the policy
• 21 paid vacation days & 14 paid sick leaves
• Work-life balance
• Cozy office in Warsaw available for you whenever you need it
• Coffee, tea, Red Bull, sweets, fruits, and more snacks
• Adequate teammates

💌 Interested?

We’re always on the lookout for passionate, driven, and curious people to join our team.If that sounds like you — we’d love to hear from you!

Tango is a successful, marketleader, a live-streaming Platform with 450+ Million registered users, in an industry projected to reach $240 BILLION in the next couple of years. 

The B2C platform, based on the best-quality global video technology, allows millions of talented people around the world to create their own live content, engage with their fans and monetize their talents.

Tango live stream was founded in 2018 and is powered by 300+ global employees operating in a culture of growth, learning, and success!

The Tango team is a vigorous cocktail of hard workers, creative brains, energizers, geeks, overachievers, athletes, and more. We push the limits to bring our app from “one of the top” to “the leader”. 

The best way to describe Tango's work style is not to use the word “impossible”. And we believe that success is a thorny path that runs on sleepless nights, corporate parties, tough releases, and of course our users' smiles (and as we are a LIVE app, we truly get to see our users all around the world smiling right in front of us in real-time!).  

Responsibilities

• Development and support of SPA on ReactJS: web version mobile-first of a high-load application, admin panels for internal use, and marketing pages
• Collaborate with other teams to effectively meet the product and technical needs of the project
• Proactively participate in improvements and existing solutions tuning
• Share expertise and knowledge with your teammates

Requirements

• At least 7 years of commercial experience in development in JS (ES6+)/Typescript
• Strong knowledge of CSS, HTML5, SASS, Jest
• At least 2 years of commercial experience in development in with ReactJS version 16+ (hooks)
• Experience with state management frameworks: Redux and Redux toolkit preferred
• Intermediate English

What we offer:

• International company with several offices in different locations : Tel-Aviv, Kyiv, Warsaw, Limassol.
• Granting an Option;
• A professional environment with great people to work with;
• Competitive salary, performance review;
• Flexible working hours, no one here tracks your work time because our culture is built on trust and cooperation;
• Social package, including sports coverage, elite medical insurance for you and family;
• 20 working days paid vacation and 100% sick leaves coverage;
• Opportunities to make a difference, to develop and grow;
• Regular corporate celebrations, team buildings and fun activities;
• Comfortable office close to the metro station. Our Kyiv office is open 24/7 with all safety and health measures in place.

We are a fast-growing fintech company with over 8 years of experience building financial infrastructure for digital advertising businesses. We provide solutions that help media buyers and advertisers run campaigns efficiently and without interruptions.

We are seeking a strategic and hands-on Chief Financial Officer to lead the financial function across multiple international entities. This role suits someone who combines high-level strategic thinking with a solid operational foundation in accounting and reporting.

Responsibilities:

• Partner with the CEO and COO to shape business strategy and financial planning
• Provide the board with monthly and yearly financial analysis based on reporting to guide strategic direction
• Own reporting, invoicing, and reconciliation logic
• Develop dashboards and automate ongoing data analysis for real-time visibility in close collaboration with the product and engineering teams (proven experience applying solutions is a strong advantage)
• Manage legal entities across the globe (with focus on Europe and the US)
• Manage relationships with auditors, tax advisors, banks, and legal counsel
• Manage multi-currency operations, treasury, and cash flow across jurisdictions
• Work with banks, payment systems, financial regulators
• Identify and manage financial risks, inefficiencies, and growth opportunities
• Lead the finance team of 5+ people including setting clear KPIs and ensuring professional development plans are followed through
• Establish efficient communication processes within the finance team and across other departments

Requirements:

• 8+ years of experience in finance, with prior experience in a Head of Finance or CFO role
• C1+ English level
• Strong expertise in financial modelling, reporting, and strategic planning across multiple international entities
• Background in SaaS, fintech, or a high-growth tech company is strongly preferred
• Proven experience of efficient managing and developing finance teams - from hiring to following personal development plans
• Experience with automation opportunities in finance operations
• Proven ability to implement scalable systems and lead through periods of growth or change
• Strong communication and people management skills – able to inspire a team while engaging the board
• Comfortable operating in a fast-moving, entrepreneurial environment

Nice to have:

• Hands-on experience with AI tools in a finance context
• Hands-on experience experience with automations (workflows, dashboards)

What we offer:

• Remote work from anywhere
• Full-time
• Unlimited paid vacation days
• 10 paid sick days
• English classes
• Presents from the company

Our client is a Barcelona-based iGaming company specializing in the development of online slot games for international markets. With a catalogue of 150+ titles and a steady release pace of 3–4 new games per month, they combine creative vision with strong technical expertise.

This role is ideal for someone who enjoys game development, takes ownership of features from concept to release, and wants to influence technical decisions within the team.

Your main responsibilities:

• Develop slot games using TypeScript / JavaScript (ES6+) from task to completed result.
• Optimize game performance across different devices and browsers.
• Participate in code reviews both as a reviewer and as an author open to feedback.
• Work closely with designers and other developers to achieve high-quality results.
• Take part in technical discussions and gradually influence technical decisions.

Requirements

• 3+ years of commercial experience in game development, browser or mobile.
• Strong knowledge of TypeScript or JavaScript (ES6+).
• Practical experience with one or more frameworks: PIXI, Phaser, Cocos2d, Three.js.
• Understanding of core game development principles: game loop, state management, rendering optimization.
• Ability to complete tasks independently without constant supervision.
• Willingness to work in a team and openness to feedback.

Benefits

• Engage in a unique international web project, gaining valuable experience.
• 20 vacation days and 5 sick days yearly.
• Flexible start to the workday.
• Experience a dynamic work environment that avoids monotony.
• Opportunities for professional growth and advancement.

About the Role
We are seeking a results-driven Systems Engineer with solid experience across on-premises and cloud environments, backup and recovery solutions, and Microsoft 365 administration. The ideal candidate is proactive, self-motivated, and committed to continuous learning — including independently pursuing relevant certifications, licensing, and training to stay current with evolving technologies.

Key Responsibilities

• Investigate and resolve client issues received through the internal ticketing system in a timely and effective manner.
• Manage Citrix infrastructure connecting to VDI and Terminal Server environments.
• Administer and maintain enterprise devices and servers, including software updates, system configurations, and ongoing maintenance.
• Manage Microsoft 365 infrastructure including Exchange Online, SharePoint, Active Directory, Teams, and related services.
• Develop, document, and maintain Group Policy settings aligned with organizational security standards.
• Create and update IT procedures, standards, and operational documentation as required.
• Execute backup and recovery operations for critical organizational systems and services in compliance with defined recovery objectives; document all actions and resolutions thoroughly.
• Maintain comprehensive infrastructure documentation including configuration guides and disaster recovery plans.

Requirements & Qualifications

• Proven experience managing and maintaining complex IT infrastructure systems.
• Strong proficiency in configuring, deploying, and troubleshooting servers, networks, and storage devices.
• Active Directory administration: user/group management, Group Policy, and domain controller configuration.

• Microsoft 365 administration, including: Managing Exchange Online mailboxes, distribution groups, shared mailboxes, and mail flow rules.

      Administering SharePoint Online sites, permissions, and document libraries.
      Managing Teams environments including policies, channels, and guest access.
      Handling user lifecycle in Microsoft 365: provisioning, licensing, and deprovisioning.
      Configuring and maintaining Microsoft Entra ID (Azure AD) including conditional access and MFA.

• Monitoring and responding to alerts via the Microsoft 365 Admin Center and Security & Compliance portal.
• Solid hands-on experience with backup and disaster recovery procedures to ensure data integrity and minimize downtime.

• Skilled in monitoring system performance, identifying bottlenecks, and implementing optimization strategies.

   

Technologies

• Operating Systems: Windows Server and Windows environments; Linux familiarity is a plus.
• Virtualization: Hyper-V, VMware.
• Cloud Platforms: Azure (preferred), AWS.
• Scripting: PowerShell ; Bash is a plus.
• Familiarity with Web Application Firewall (WAF) technologies.

Professional Attributes

• Self-motivated and willing to independently pursue certifications, licensing, and training relevant to the role.
• Strong written and verbal communication skills in English (intermediate level or above).
• Ability to produce clear, accurate documentation, procedures, and troubleshooting guides.

• Effective collaborator with cross-functional teams and end-users.
  Detail-oriented with a structured, methodical approach to problem-solving.

   

Nice to Have

• Familiarity with Barracuda Email Gateway for spam filtering, email security, and data protection.
• Experience implementing and managing firewall and intrusion detection systems.
• Active Microsoft certifications (e.g., MS-102, AZ-104, AZ-800) or willingness to obtain them.

About the Role

As a Full Stack Developer, you will play a pivotal role in designing, developing, and maintaining our web applications, ensuring high performance and scalability. You will work closely with cross-functional teams to deliver high-quality software solutions while contributing to projects that integrate advanced machine learning models, including large language models (LLMs), to deliver personalized user experiences and innovative features. You’ll be part of a small, collaborative team that values continuous improvement and embraces the latest in technology.

Our technology stack includes .NET Core, C#, React.js, Node.js, Typescript, SQL Server 2019, Docker, Kubernetes, Google Analytics, and Power BI.

Our ecosystem includes 170 connected applications and services, our main database is 2 TB, our sites handle 1 million visitors a day and 2 billion requests a month, and we release changes to production several times a day. We are a continuous integration and continuous deployment (CI/CD) organization.

What You’ll Do:

• Collaborating with cross-functional teams to demonstrate how they can effectively leverage our infrastructure to meet their objectives.
• Designing, developing, and maintaining robust, scalable, and efficient web applications, backend logic modules and database structure.Identifying and implementing strategies to improve the stability, performance, and scalability of our applications and services.
• Responding promptly to production incidents, employing creative problem-solving skills to minimize downtime and mitigate potential issues.
• Supporting team members, fostering a culture of continuous learning and technical excellence.
• Conducting code reviews and ensuring adherence to coding standards and best practices across the team.
• Participating in the evaluation and integration of new technologies, including AI and automation tools, to drive innovation and efficiency.

What We’re Looking For:

• Minimum of 3 years of professional experience in full-stack development.
• Extensive experience with React.js, including state management (Redux, Context API) and component-based architecture.
• Proficiency in .NET frameworks, C#, and data access technologies.
• Familiarity with Unit / Integration tests using any of Jest, NUnit, Playwright, React Testing Library.
• Strong knowledge of front-end technologies such as HTML5, CSS3, JavaScript, and TypeScript.
• Familiarity with database systems such as SQL Server or MySQL.
• Strong knowledge of design and architectural patterns, SOA design & web service development.
• Strong understanding of development processes.
• Experience with LLMs / Generative AI tools (e.g., OpenAI, Copilot, Cursor).
• Experience with Web Page performance optimization and measurement will be a plus.
• Degree in Computer Science, a related discipline, or equivalent work experience.
• Upper-intermediate level of English.
• Excellent problem-solving and analytical skills, with a keen attention to detail.
• Strong communication and interpersonal skills, with the ability to work effectively in a team-oriented environment.
• Ability to manage multiple tasks and prioritize effectively in a fast-paced environment.

Perks and Benefits

• Time off throughout the year (paid and unpaid)
• Professional development support and encouragement
• Resources to help improve your overall well-being
• Free JustAnswer membership

Data Science UA is a service company with deep expertise in AI and Data Science. Our story started in 2016 with the first Data Science UA Conference in Kyiv, and since then, we’ve built one of the largest AI communities in Europe. 

About the role and the client:
We are looking for a Chief Technology Officer (CTO) for a consulting company delivering hardware and software solutions for defense projects.
The CTO will be the primary technical authority, responsible for system architecture, product viability, and engineering leadership — from idea conception to field deployment.

This role is ideal for a systems engineer and technical leader capable of designing complex end-to-end solutions and managing multi-disciplinary teams (hardware, embedded, software, AI/DSP).

In defence technology, mistakes in architecture are costly.
This role is about responsibility, systems thinking, and creating technologies that work in real operational conditions, not just look good in presentations.
Kyiv-based vacancy
 

Key Responsibilities:
- Define the company’s technical strategy and R&D directions.
- Design end-to-end systems (sensor → compute → comms → operator / effect).
- Provide architectural oversight for hardware, embedded, AI/DSP, and software teams.
- Participate in presales and technical client discussions.
- Evaluate and select new projects or solutions (go/no-go decisions).
- Collaborate with field teams to analyze real-world testing results.
- Manage the transition from prototype to working product and scalable solution.
- Build, mentor, and develop engineering teams.
- Select technologies, define architecture, and establish engineering processes.

Requirements:
- 5+ years of experience in systems engineering / embedded / robotics / avionics / radar / RF / EW / UAV / defense technology.
- Proven experience integrating hardware + embedded + software.
- Strong systems-level thinking and experience designing complex technical solutions.
- Understanding of field constraints: latency, reliability, maintainability, and real-world operational conditions.
- Track record of taking products from prototype → MVP → deployment/production.
- Experience managing engineering teams.
- Experience in client-facing technical roles / presales / solution architecture.
- English: Advanced.

Preferred Qualifications:
- Experience in one or more areas: UAV / RF / EW / radar / sensing / avionics / robotics.
- Ex-military engineer or experience working closely with operational military units.
- Experience with serial production or scaling complex systems.
- Proven ability to build R&D or engineering departments from scratch.
- Background in miltech / defence / robotics / telecom hardware companies.

Ideal Candidate:
- Thinks in systems, not just components.
- Can confidently say “this won’t work” and propose alternatives.
- Focused on results in the field, not presentations.
- Capable of making technical decisions under uncertainty.
- Strong leadership in client and engineering team interactions.
- Motivated to build products from scratch and shape the company’s technical direction.

What the Company Offers:
- Participation in defence technology projects.
- Exposure to hardware + embedded + software products.
- Active involvement in presales and technical strategy.
- Health insurance.
- 24 days of vacation.
- Office/lab in Kyiv.
- Opportunity to influence technical strategy and build the engineering organization.

About the Role

We are looking for an experienced Head of Retention to lead retention strategy across Asian markets and maximize player lifetime value.

In this role, you will own the full retention lifecycle, focusing on increasing LTV, improving redeposit rates, optimizing bonus efficiency, and driving sustainable revenue growth. You will work closely with CRM, VIP, Affiliate, and Product teams to build a data-driven retention system that delivers measurable business results.

Key Responsibilities

• Develop and execute retention strategies to increase LTV and redeposit rates.
• Build, optimize, and manage CRM processes, including segmentation, automation, and customer lifecycle campaigns.
• Design and improve bonus mechanics while maintaining cost efficiency and profitability.
• Identify and prevent bonus abuse and other low-value user behavior.
• Manage VIP retention strategies and high-value player engagement.
• Analyze player behavior, retention metrics, and campaign performance to identify growth opportunities.
• Optimize the deposit-to-redeposit customer journey.
• Collaborate with Affiliate teams to evaluate traffic quality based on retention and LTV performance.
• Establish reporting processes and retention KPIs.
• Lead retention initiatives focused on revenue growth and player engagement.

Requirements

• Proven experience as a Head of Retention, CRM Lead, or Senior Retention Manager within the iGaming industry.
• Strong understanding of LTV, ARPU, Redeposit Rate, Retention, and Churn metrics.
• Hands-on experience developing bonus strategies and managing retention economics.
• Strong analytical skills with experience using Excel, BI tools, and data reporting systems.
• Experience managing VIP player segments and loyalty programs.
• Proven track record of building and scaling CRM systems and automated retention flows.
• Data-driven mindset with strong problem-solving abilities.
• English proficiency sufficient for business communication.

What We Offer

• Fully remote work environment.
• High level of ownership and decision-making authority.
• Opportunity to directly influence revenue growth and retention performance.
• International team and fast-growing iGaming business.
• Competitive compensation package based on experience and expertise.

Success in This Role

• Sustainable growth of LTV and redeposit rates.
• Reduction in player churn.
• Improved bonus efficiency and profitability.
• Strong contribution to overall company revenue.
• Well-structured and scalable retention system across Asian markets.