Jobs at Djinni

Moon Active is a company driven by the mission to become a global leader in mobile gaming. Founded in 2011, our passion for creativity, cutting-edge technology, and delivering exceptional player experiences has resulted in games enjoyed by millions worldwide.
 

We're looking for a Site Reliability Engineer to join our talented community of professionals in our Warsaw office and contribute to the ongoing success of our leading mobile gaming products.
 

The Site Reliability department focuses on ensuring the continuous smooth operation of live production systems that serve millions of players globally. You will support production activities by troubleshooting, developing, maintaining, and documenting technical solutions related to Moon Active’s production infrastructure.
 

Responsibilities

• Ongoing monitoring and control of the availability of the different services of the production 24/7
• Monitoring and detecting problems in the production environment, as well as 1st and 2nd tier infrastructure and application troubleshooting
• Working within Operations with interfaces to Product, R&D and Support teams to escalate, troubleshoot and resolve complex issues
• Ensuring proper documentation is provided for all supported SRE activities and standards

Requirements

• Experience with Linux based systems
• Scripting experience (Python/Bash/etc)
• Basic monitoring experience
• Good communications skills
• Troubleshooting and problem-solving skills
• Ability and motivation to work in a team and in rotating shifts 24/7 (~3-6 night shifts a month)
• Proficiency in English

Advantages

• Be familiar with AWS/GCP (or other cloud providers)
• Experience with monitoring tool and vendors such as Prometheus, Grafana, ELK, NewRelic, Signalfx, CloudWatch, DataDog, etc
• Experience with SQL
• Experience with IaC (Terraform)
• Experience with distributed systems, containers and Kubernetes

Benefits

• Join a global, data-driven company with a unique product and a strong R&D center
• Work in an exceptional, innovative, and dynamic environment
• Enjoy full transparency and open communication with colleagues
• Take advantage of tremendous opportunities for growth and career advancement
• Influence and help build personalized product experiences for millions of users

We offer

• Generous compensation; paid vacation and sick leave
• Comprehensive medical and life insurance for you and your family members
• From Yoga & Pilates to CrossFit & running classes - we keep moving. Plus a MultiSport card to top it off
• Comfortable office located on Królewska 16 street, Warsaw
• Free daily breakfasts and lunches, as well as a fully stocked kitchen with snacks and fruits
• The latest tech equipment, including macOS devices
• Training & Development/Tuition reimbursement
• Friend Referral Program with generous bonuses
• Friday Happy Hours and team gatherings to foster a fun and collaborative workplace culture
• Relocation bonus for non-local candidates
• Bicycle and Car parking

Our client is a technology startup founded by engineers with 25 years of combined experience delivering everything from hypercars to buses. Their vision is bold: to automate the development of control software.Unlike others, they do not rely on third-party LLMs. Instead, they have developed their own foundation model entirely from scratch, using novel technology. This is not about automating code snippets or creating an assistant — it is about building a standalone engineer.

What we are looking for: 

Soft Skills:

• Hard-working mindset: delivery above all else!
• Curiosity-driven: eager to understand systems at a fundamental level, always willing to peek under the hood
• Architectural thinking: ability to see the whole system and design end-to-end
• Smart, resilient, detail-oriented, and super fast

Hard skills:

• 5+ years of professional software development experience
• Strong back-end expertise in one or more of the following: Node.js, C++, Python
• Production-level proficiency with React
• Strong understanding of cloud platforms (e.g., AWS, Azure)
• Familiarity with database design and management (SQL, NoSQL)
• Ability to design and build large-scale SaaS architectures from scratch

What you will do:

• Architect, design, and develop a full-stack solution around the client’s core technology
• Build a product for engineers: robust, scalable, and performant
• Integrate with third-party toolchains and cloud-based clusters
• Optimize the system for performance, scalability, and security

Benefits:

• Competitive compensation + share options
• Total freedom in technology stack. Select a setup that makes the product (and you) efficient
• Brutal honesty and extremely transparency — no management jargon, only the simple truth
• Relocation package and visa sponsorship
• 28 vacation days + UK public holidays
• Modern hardware equipment
• Gym membership in London

We are looking for a 2D Artist to create illustrations, UI elements, and concept art for our projects. You will work closely with the design and development team. Remote work, flexible schedule.
Requirements:

• 1+ year of experience as a 2D artist
• Strong skills in Photoshop / Illustrator / Procreate or similar tools
• Ability to create concept art, illustrations, UI elements
• Basic understanding of composition and color theory

Responsibilities:

• Create graphic assets for projects
• Work on characters, objects, UI elements
• Collaborate with designers and developers

We offer:

• Remote work, flexible schedule
• Friendly team and growth opportunities

We need a 3D Generalist/Animator with experience in modeling and animation. Tasks include creating 3D models, rigging, and animations for games and video projects. Remote work, growth opportunities.

Requirements:

• 1+ year of experience in 3D modeling and/or animation
• Experience with Blender / 3ds Max or similar software
• Knowledge of animation, rigging, texturing
• Willingness to learn new tools and techniques

Responsibilities:

• Create 3D models (characters, props, environments)
• Animate characters and elements

We offer:

• Remote work, flexible schedule
• Diverse projects (advertising, video)
• Professional growth opportunities

We are looking for a 2D Artist to create illustrations, UI elements, and concept art for our projects. You will work closely with the design and development team. Remote work, flexible schedule.

Requirements:

• 1+ year of experience as a 2D artist
• Strong skills in Photoshop / Illustrator / Procreate or similar tools
• Ability to create concept art, illustrations, UI elements
• Basic understanding of composition and color theory

Responsibilities:

• Create graphic assets for projects
• Work on characters, objects, UI elements
• Collaborate with designers and developers

We offer:

• Remote work, flexible schedule
• Friendly team and growth opportunities

We are seeking an experienced CRM Manager to join our dynamic team in the iGaming industry. If you are passionate about data analysis, campaign optimization, and increasing conversion rates in the online casino world, this role is for you! You will work with performance traffic, develop effective communication strategies, and influence key business metrics. Join us to grow within a rapidly expanding industry!

Requirements:

• At least 2 years as a CRM Manager in the iGaming sector, focusing on Casino.
• Deep understanding of the casino industry, including user behavior, gaming mechanics, bonus systems, and game types.
• Confident in managing key indicators such as GGR, NGR, Turnover, ATPU, etc.
• Experience working with Email, SMS, and Push notifications.
• Ability to build effective communication funnel chains (Email, SMS, Push) to boost performance traffic conversions. 
• Experience working with large data volumes, data aggregation, in-depth analysis, and deriving insights.
• Practical experience conducting A/B tests, validating results, analyzing outcomes, and optimizing marketing metrics.
• English proficiency at level B2 or higher.
• Experience in operating with Tier 1 and Tier 2 markets will be a significant plus.

Responsibilities:

• Developing and launching regular promotional campaigns for performance traffic to increase engagement and conversions.
• Creating and optimizing campaigns across various channels (Email, SMS, Push); building funnels focusing on ROI.
• In-depth analysis of campaign results, monitoring key metrics, and implementing improvements to enhance effectiveness.
• Collaborating with related teams (designers, copywriters, and other specialists) to produce quality mailings and creatives.
• Participating in the creation of the promotional calendar, testing new hypotheses, and conducting A/B experiments to identify the most effective strategies (e.g., increasing open rates).
• Implementing new ideas for process optimization and growth in profitability.

We offer:

• Flexible work schedule (start any time between 8:00 AM and 10:00 AM).
• Convenient office nearby Pecherska metro station
• Friendly and highly professional work environment.
• L&D center offering courses and training programs for skill enhancement.
• 20 days of paid vacation and a paid birthday day off.
• Corporate medical insurance coverage in Ukraine.
• Corporate discount programs for education and sports.
• Referral program with bonuses for recommending friends and family for active vacancies.
• Multiple volunteering initiatives, from active Armed Forces of Ukraine donations to Sirius animal shelter assistance.

Should your application meet our requirements, you can expect to hear from our recruitment team within five business days.

#16727551

Our client is the trusted industry leader of web accessibility and they’re developing a new set of automated testing rules to report on accessibility issues that were previously only possible with manual audits. You will have a possibility to work alongside industry experts and WCAG standard body members as our client directly contribute to helping companies find and fix accessibility issues during website development.

Requirements:

• 5+ years of experience and a proven track record in machine learning or AI engineering, with a strong focus on deploying models in production environments.
• Expert with Python development (5+ years), and experience with common ML libraries such as TensorFlow, PyTorch, Scikit-learn, or Hugging Face Transformers.
• Experience building and maintaining scalable ML infrastructure
• Strong back-end engineering skills, including designing APIs, integrating with cloud services, and building infrastructure to support ML workflows.
• Hands-on experience with data engineering tools and workflows (e.g., AWS Glue, Athena, Spark, or similar).
• Strong understanding of model lifecycle management, including training, evaluation, deployment, and monitoring in real-world systems.
• Familiarity with web technologies (HTML, CSS, JavaScript) and an interest in digital accessibility.
• Excellent communication skills, with the ability to explain complex ML concepts to both technical and non-technical audiences.
• Upper Intermediate or higher English level.

Additional skills:

• Computer Vision, NLP
• Docker & AWS
• Accessibility knowledge

Responsibilities:

• Lead the design, training, and deployment of ML models in production environments with millions of users.
• Apply cutting-edge methods across computer vision, NLP, supervised/unsupervised learning, and representation learning to accessibility problems.
• Own the full ML lifecycle: from data collection and labeling strategy, to model evaluation and monitoring, to continuous improvement in production.
• Drive engineering excellence through expert-level Python development, ensuring codebases are clean, scalable, and maintainable.
• Champion responsible and ethical AI practices, with a focus on transparency, fairness, and accessibility impact.
• Collaborate cross-functionally with product managers, designers, and accessibility experts to identify high-impact opportunities.
• Apply state of the art methods to advance the field of accessibility.

What we offer:

• Annual paid vacation of 18 working days.
• Extra vacation days for long-lasting cooperation.
• Annual paid sick leave of 10 days.
• Maternity/Paternity leave.
• The opportunity for sabbatical leave.
• Marriage and Parenthood Package.
• Compensation for sports activities (up to 250$ per year) or health insurance covering (70%) — after the trial period.
• Internal education(corporate library, Udemy courses).
• Career development plan.
• English and Spanish classes.
• Paying taxes and managing PE (Private Entrepreneur).
• Technical equipment.
• Internal Referral program.
• Opportunity to take part in company volunteering activities.
• Sombra is a “Friendly to Veterans” award-holder.

Default Value is an outsourcing company with 15+ years of experience, continually growing and currently expanding the Symfony team of developers. We are looking for a reliable, proactive and motivated Symfony Developer who is not afraid of challenges and is passionate about developing and implementing new ideas. 

Required skill:

• 3 + years of PHP development experience
• Passion for coding with PHP
• Strong background using Object-Oriented PHP
• 1.5 + years of Symfony framework development experience
• Doctrine ORM and migrations
• Writing CLI commands with Symfony Console
• Symfony Events and Event Listeners
• Symfony Forms
• Symfony Validation
• Symfony Serializer
• Understanding and using software design patterns
• Working with Git according to the Git Flow (or alternatives)
• Database skills (MySQL, Oracle, PostgreSQL, etc.)
• English: Intermediate

Will be a plus:

• Experience with backend refactoring and profiling
• Understanding of the application life cycle and development methodologies
• Wordpress
• RabbitMQ
• Docker, Docker Compose
• Redis
• Unit and Integration Tests
• JavaScript (jQuery, Angular, React, Vue.js)

We offer:

• Space for professional and personal growth
• Friendly and highly professional teams
• Remote (or hybrid) work model 
• Paid vacation and sick leaves 
• Competitive compensation 
• Accounting and support for private entrepreneurs in Ukraine
• Compensation for our English courses
• Opportunity to take relevant professional courses, certifications, etc

If you think your skills and enthusiasm match what we’re looking for, we’d be happy to hear from you. Send us your CV, and let’s see what we can achieve together!

Job Responsibilities:
 

• Develop and implement an SEO strategy;
• Optimize website content and structure to improve search engine rankings;
• Conduct technical SEO audits and implement recommendations;
• Identify opportunities to increase organic traffic;
• Monitor and report on the results of SEO campaigns;
• Optimize for LLM-powered answer engines.
   

Key Skills:

• 3+ years of experience as an SEO Specialist;
• Knowledge of tools such as GA4, Google Search Console, Tag Manager, Screaming Frog, Ahrefs, SEMrush, or similar;
• Understanding of search engine algorithms;
• Basic understanding of HTML and the impact of JavaScript on indexing;
• Experience working with Wordpress;
• Analytical thinking and attention to detail;
• Knowledge of the latest SEO trends;
• At least B2 English knowledge.

   We’re looking for HR Business Partner to shape the future of culture and growth at Simply Contact.

   It’s not just about HR. It’s about developing a culture and outstanding employee experience.

Key Responsibilities:

• Act as a strategic advisor to business leaders on people and culture-related decisions, ensuring alignment with organizational goals;
• Lead organizational culture evolution by shaping values-based programs, rituals, and internal campaigns that support engagement, inclusion, and performance;
• Build and scale a data-driven Employee Experience framework, from onboarding through engagement, retention, and internal mobility;
• Act as a key driver of corporate culture: facilitate rituals, team events, and cross-cultural synergy;
• Develop initiatives and communications that promote company values at all levels Support internal communication channels and employer branding content;
• Monitor employee satisfaction and engagement through surveys and follow-up action plans;
• Initiate programs to increase retention, internal mobility, and motivation;

• Collaborate with recruiters to ensure cultural fit and smooth integration for new hires Stay updated on HR trends, tools, and global best practices;

   

What We’re Looking For:

• 2+ years of experience in HRBP / HR Generalist roles within BPO, IT, or service industries;
• Proven experience in driving culture initiatives, internal communication, or team building;
• Strong communication, facilitation, and conflict resolution skills;
• Strategic and structured thinking with a hands-on mindset;
• Ability to multitask and support multiple teams simultaneously;

• Fluency in English and Ukrainian (B2+);

   

What we offer:

• Сompetitor’s salary and bonus system;
• Freedom to create and own high-impact projects;
• Clear KPIs, budget, and support from HR and leadership;
• A company that values people, creativity, and culture as much as results.

Default Value is an outsourcing company with 15+ years of experience, continually growing and currently expanding our Magento Development team. We are looking for a reliable, proactive, and motivated Magento Developer who is not afraid of challenges and is passionate about developing, implementing new ideas, and working in a team. 

Required skill:

• 3+ years of PHP development experience
• Strong background using MVC frameworks and Object-Oriented PHP
• Understanding and using common application design patterns
• Experience in API development (any of SOAP/REST/GraphQL)
• Working with Git according to the Git Flow (or alternatives)
• JavaScript for Magento (jQuery, KnockoutJS)
• CSS preprocessors (Bootstrap, SASS, Grid, Flex)
• HTML5
• Composer
• MySQL
• Magento 1, 2 and Magento Cloud Infrastructure
• ElasticSearch
• Grunt
• Experience with Linux systems and Docker
• Understanding of the application life cycle and development methodologies
• English: Upper-Intermediate

Will be a plus:

• Knowledge of web application architectures
• React and PWA development experience
• Hyvä
• DBA basics, MySQL queries profiling and optimization
• Experience with performance and log analysis tools (Blackfire.io, NewRelic, Graylog, ELK(B) Stack, etc.)

We offer:

• Space for professional and personal growth
• Friendly and highly professional teams
• Hybrid work model 
• Paid vacation and sick leaves 
• Competitive compensation 
• Accounting and support for private entrepreneurs in Ukraine
• Compensation for our English courses
• Opportunity to take relevant professional courses, certifications, etc

If you think your skills and enthusiasm match what we’re looking for, we’d be happy to hear from you. Send us your CV, and let’s see what we can achieve together!

We’re Gaxos Labs – a fast-growing company building and running B2C AI-powered tools across niches like Utilities, Entertainment, and Creativity. Our current projects include UnGPT.ai – an AI-humanizing tool for content creators, and Art-Gen.ai – an AI image generator that empowers users to create visuals from simple text prompts.

As we continue to grow, we’re looking for a Full-Time Product Analyst to strengthen our product analytics capabilities, optimize decision-making processes, and help scale our products with data-driven insights.
 

Key Responsibilities

• Deep dive into product performance and assess current analytics systems (Google Analytics, Mixpanel, and Tableau) to optimize their usage.
• Implement dashboards, design and monitor A/B testing systems, and build LTV models and financial forecasts.
• Regularly analyze LTV, target CAC, and A/B test results to evaluate feature performance and drive improvements in key metrics.
• Support business planning with consideration for market trends, product performance, and metric changes.
• Ensure analytics is tightly aligned with overall business objectives.
• Collaborate closely with product managers, stakeholders, and cross-functional teams.
• Advocate for data-driven decisions by presenting clear analytical recommendations.
  
   

Skills & Experience
 

• 2+ years of experience as a Product Analyst
• Proven expertise in designing and analyzing A/B tests
• 2+ years of hands-on experience with Mixpanel (or Amplitude) and Tableau
• 1+ year of practical experience with SQL
• Strong problem-solving skills and critical thinking abilities

Join our Back Office team!

We are looking for a responsible and motivated Junior Financial Operations Specialist (Funding Specialist) who is ready to grow and acquire new knowledge.

Responsibilities:

• Handling requests from clients/partners and resolving issues related to transactions and other operational matters
• Communicating with clients/partners via email
• Interacting with merchants and suppliers to resolve disputes

• Performing additional technical tasks related to work processes

   

Requirements:

• Knowledge of Excel, Google Sheets
• Confident PC skills
• Strong analytical skills

• English level: at least Strong Pre-Intermediate

   

We offer:

• We are open to candidates with minimal experience
• 160 paid vacation hours per year
• 10 paid sick leave days per year
• Medical insurance
• Opportunity to work remotely
• Professional education budget
• Language learning budget
• Wellness budget (gym membership, sports gear and related expenses)

About us:

We are an architectural and engineering company focused on large-scale innovative projects. We provide a full range of design services - from urban planning concepts to support for the commissioning of facilities.

An integral part of the work of AVR Development specialists is the use of BIM (Building Information Model) technology, which applies the principle of “building twice”. We create an accurate digital model of the future building, which allows us to develop a comprehensive estimate of all sections of the project and avoid mistakes during construction. BIM technology saves the customer money during construction.

About the project:

BEEMESTA is a digital ecosystem for construction that combines Building Information Modeling (BIM) technologies with algorithms for integrating cost estimation data. The project was created to eliminate inefficiencies in construction project budgeting through automated cost calculations, transparent resource planning, and digital integration of all stakeholders — architects, cost estimators, suppliers, and project managers.

The core of BEEMESTA is the creation of a unified digital environment where work volumes can be assessed quickly and accurately, and the best market prices for materials and services can be selected. Our goal is to eliminate duplicated work, delays, and cost overruns caused by fragmented communication between project participants.
 

We are looking for a Middle .NET Backend Engineer to strengthen our team and deliver the project.

Requirements:

Backend Expertise

• Expert-level knowledge of modern .NET and C# programming
• Strong experience with ASP.NET Core, Entity Framework Core
• Proficiency in building RESTful APIs and microservices architectures
• Knowledge of design patterns and software architecture principles
• Proficiency in API design principles and OpenAPI specifications

Database&Data Management

• Strong experience with SQL Server, PostgreSQL, or other relational databases
• Proficiency in database design, optimization, and performance tuning
• Experience with ORM and data access patterns

Azure Cloud

• Experience with Azure Service Bus, Event Grid, and messaging patterns
• Proficiency in Azure Functions, App Services, Key Vault, and Application Insights
• Knowledge of Azure storage solutions (Blob Storage, Table Storage, etc.)
• Experience with Azure DevOps for CI/CD and project management

Architecture

• Strong understanding of Clean Architecture, SOLID principles, and DDD patterns
• Experience with microservices patterns and distributed systems design
• Knowledge of event-driven architectures and asynchronous programming

Testing

• Experience with unit testing frameworks (xUnit, NUnit) and mocking libraries
• Knowledge of integration testing and contract testing strategies
• Experience in test-driven development (TDD) and behavior-driven development (BDD).

Best practices

• Design robust and scalable backend architectures
• Debug complex distributed system issues and optimize performance
• Prioritize security and data protection in design decisions
• Optimize system performance and resource utilization
• Create comprehensive API documentation and technical specifications

Nice to have

• Experience with containerization (Docker) and orchestration (Azure Kubernetes Services)
• Knowledge of message brokers and event streaming platforms
• Familiarity with caching strategies (Redis, in-memory caching)

• Experience with AI-powered development tools (GitHub Copilot, Cloude, etc.)

   

We offer:

Competitive salary based on your skills and experience

Opportunities for professional growth, including mentorship and access to learning resources

Paid vacation and sick leave, ensuring a healthy work-life balance

Flexible working hours and hybrid/remote options to suit your lifestyle

Job Description

We are hiring a Strong Backend Engineer to join the team developing the OneAPI backend platform. The role is ideal for someone with strong Java fundamentals, some cloud-native experience, and an eagerness to grow in platform engineering within an agile, DevOps-driven environment.

• 6+ years of backend development experience with Java & Spring Boot.
• Hands-on experience with cloud platforms (AWS/GCP) and containerized applications.
• Practical knowledge of Kubernetes (K8s) for service orchestration.
• Exposure to DevOps practices: CI/CD, IaC, automation, monitoring.
• Versatility beyond Java (e.g., scripting, working with APIs, DBs, or other languages).
• Experience working in a team responsible for products quality
• Strong analytical, debugging, and collaboration skills.
  
   

Job Responsibilities

• Design, develop, and maintain APIs and backend services for OneAPI.
• Contribute to cloud-native architecture leveraging AWS and GCP.
• Implement scalable solutions with Kubernetes-based deployments.
• Work closely with the Technical Lead to align on architecture and coding standards.
• Take ownership of features end-to-end: from design to deployment and monitoring.
• Troubleshoot complex technical issues and provide production support when needed.
• Ensure quality of develope software

Department/Project Description

Our client is a global leader in cloud security, enabling organizations to securely transform their networks and applications for a mobile and cloud-first world. Through its Zero Trust Exchange™ platform, it provides fast, secure, and seamless access to applications, regardless of device, location, or network. Trusted by thousands of enterprises, their products help reduce risk, lower IT costs, and deliver a better user experience by replacing traditional on-premises security with a modern cloud-delivered approach.