Jobs at Djinni

Our client is an international product-based IT company specializing in the iGaming industry. Born in 2014, they rocked the CIS region, and now take the success to the world. 

We are currently looking for a SEO specialist to drive organic growth in highly competitive niches, including iGaming and betting. This role is focused on strengthening online presence and supporting the overall growth of projects.

📋 Key responsibilities and your contribution:

• Developing SEO strategies for cross-brand websites targeting;
• Launching and reviewing websites: preparing technical requirements for developers and conducting technical audits of launched sites;
• Managing website content: semantic core collection, keyword clustering, text analysis of competitors’ articles, preparing briefs for copywriters, generating texts with AI, and reviewing completed content;
• Off-page optimization: auditing the backlink profile of the site and its competitors, preparing anchor lists, and purchasing links;
• Searching for and selecting drop domains, participating in auctions and purchasing them, restoring domains, placing links, and sourcing new domains;
• Monitoring search results and reacting quickly to changes;
• Analyzing competitor strategies and identifying growth opportunities for promoted websites;
• Monitoring and analytics, including conversion-focused work;
• Testing hypotheses: running A/B tests, analyzing results, and adjusting approaches accordingly.

📚 Your qualifications:

• 2+ years of hands-on SEO experience;
• Proven experience in betting / iGaming / gambling, or other gray-area, highly competitive niches targeting the CIS market (is a must), with a solid understanding of the restrictions and specifics involved;
• Ability to conduct competitor analysis and develop SEO strategies;
• Strong expertise in technical SEO, content strategy, and link building;
• Proficiency with the following tools: Ahrefs, SEMrush, GSC, GA4, Screaming Frog, Jira;
• Working knowledge of CSS/HTML required for SEO tasks;
• Ability to independently source and purchase drop domains;
• Experience collaborating with developers and copywriters;
• Self-sufficiency, strong organizational skills, and a willingness to grow and test hypotheses.

➕ Nice to have:

• Experience with behavioral factor manipulation is a strong plus.

   

Benefits:

⭐ Days of recovery: 20 paid vacation day per year and unlimited sick leave days.

⭐ Opportunities for professional development: training, workshops, internal experts, and working with modern SEO tools.

⭐ Support for initiatives and access to resources for growth.

⭐ Participation in highly competitive projects where you can quickly level up your skills.

⭐ A professional team and a product-driven approach.

We are looking for a Sales Engineer who can quickly learn our software products and translate technical capabilities into clear business value for customers. You will partner closely with Sales and our technical team to run discovery calls, design the right solution approach, and deliver confident, tailored demos that match the customer’s level of technical expertise.

You will work primarily with English-speaking customers across the US, Canada, and Europe. Knowledge of Ukrainian is a plus.

Key Responsibilities:

• Lead English discovery calls to understand customer goals, current workflows, constraints, and success criteria
• Analyze customer business processes and identify high-impact opportunities for process automation
• Shape the solution approach with internal technical teams, balancing feasibility, timeline, and customer priorities
• Prepare and deliver customized demos aligned to each prospect’s use case, industry language, and technical level
• Support Sales through the full presales cycle: qualification, solution positioning, technical validation, and next steps
• Provide clear, structured answers to technical questions while keeping discussions customer-friendly and outcome-focused
• Assist with RFPs / security or technical questionnaires when needed
• Capture discovery outcomes, risks, and requirements in a structured way, ensuring smooth handoff to implementation teams

What We’re Looking For (Required):

• Experience in Pre-Sales, Solutions Engineering, Technical Consulting, or Implementation Consulting for software products
• Strong technical foundation and ability to learn new platforms quickly (integrations, automation, workflows, data concepts)
• Proven ability to run effective demos: engaging, structured, and tailored to different customer audiences
• Excellent communication and presentation skills: you can explain complex topics simply, confidently, and professionally
• Strong sales awareness: you understand how deals progress and how to support Sales without turning calls into deep technical lectures
• Fluent English (Upper-Intermediate / Advanced) for customer calls, demos, and written responses

Nice to Have:

• Experience with B2B SaaS, enterprise workflows, or document/process automation platforms
• Understanding of common integration patterns (APIs, webhooks, SSO, ERP/CRM integrations)
• Familiarity with security and compliance topics (data handling, access controls, cloud fundamentals)
• Knowledge of Ukrainian (spoken/written) is a plus

What Success Looks Like:

• Customers clearly understand the value, the process, and the “how” without feeling overwhelmed
• Demos feel relevant and easy to follow, with the right level of technical depth for each audience
• Sales cycles move faster because technical risks are identified early and addressed calmly and clearly

We’re looking for an analyst with a curious and proactive mindset — someone who:

• doesn’t just build reports, but understands the story behind the numbers
• asks the right questions
• digs deeper than what’s initially requested

This is not a pure BI developer role. We’re looking for someone who thinks through data.

Qualifications:

• Analyze product and business metrics within the iGaming domain
• Build, maintain, and improve dashboards (Tableau / Power BI / similar tools)
• Work with data using SQL (data extraction, transformation, validation)
• Identify insights, trends, and anomalies in datasets
• Translate data into clear conclusions and actionable business recommendations
• Contribute to defining KPIs and key metrics
• Communicate with clients: gather requirements and уточнять задачи
• Improve existing reporting systems and analytical approaches

Responsibilities:

• 2+ years of experience in analytics (data / product / BI / marketing analytics)
• Strong SQL skills
• Hands-on experience with BI tools (Tableau, Power BI, Looker, or similar)
• Strong analytical and critical thinking skills
• Ability to structure ambiguous problems independently
• End-to-end data handling skills: from query to insight
• Clear written and verbal communication

NICE TO HAVE

• Experience in iGaming or related industries
• Understanding of product analytics (funnels, retention, LTV, etc.)
• Experience working with large datasets
• Knowledge of Python or R for data analysis
• Experience in outsourcing or consulting environments

What we offer

• 40-hour working week
• Flexible schedule
• Fully remote work
• Opportunity to work with multiple products and clients (not just one project)
• Fast professional growth through diverse cases and early-stage company exposure
• Real impact on business decisions and product development

Project Description

We are a global audience and location intelligence company that helps marketers connect the digital and physical world. We provide data-driven solutions to enhance marketing campaigns by leveraging location and audience data to reveal consumer behavior and enable more precise targeting and measurement. We work on high-end / high-performance / high-throughput systems for in-time analysis of data for autonomous driving and other big data applications e.g. for E-commerce.

Job Responsibilities

Work in a self-organised agile team with a high level of autonomy, and you will actively shape your team's culture.

Design, build, and standardise privacy-first big data architectures, large-scale data pipelines, and advanced analytics solutions in AWS.

Develop complex integrations with third-party partners, transferring terabytes of data.

Align with other Data experts on data (analytics) engineering best practices and standards, and introduce those standards and data engineering expertise to the team in order to enhance existing data pipelines and build new ones.

Successfully partner up with the Product team to constantly develop further and improve our platform features.

Requirements:

• 4+ years in a Data Engineering or similar high-scale role.
• Expert-level Python skills. Familiarity with Java or Scala is a major plus.
• Proven hands-on experience building scalable solutions directly within AWS.
• Deep proficiency in high-throughput architectures using Kafka, Spark, Hadoop, MongoDB, AWS Batch, AWS Glue, Athena, Airflow, and dbt.
• Exceptional SQL and data transformation skills, with an eye for optimizing NoSQL and SQL databases.
• Ability to simplify complex technical concepts and a passion for mentoring junior engineers in a collaborative environment.

Payment Monitoring Manager (Junior / Trainee)

We are looking for a detail-oriented and responsible Payment Monitoring Manager (Junior / Trainee) to join our team and support day-to-day payment operations.

This role is a great entry point into iGaming operations, fintech, and risk monitoring — perfect for someone who is attentive, structured, and ready to learn.

Responsibilities:

• Monitor incoming and outgoing payments in real time
• Track payment statuses and ensure smooth processing
• Identify and flag suspicious or unusual transactions
• Work with payment providers and internal teams to resolve issues
• Support risk & fraud checks based on internal guidelines
• Maintain accurate records and reports of payment activities

• Escalate critical issues to the Team Lead in a timely manner

   

Requirements:

• Strong attention to detail and analytical thinking
• Ability to work with large volumes of data
• Responsible, structured, and fast learner
• Basic understanding of online payments / fintech is a plus
• Experience in iGaming / payments / support is a plus, but not required

We offer:

• Opportunity to start a career in iGaming & fintech
• Hands-on experience with payment systems and fraud monitoring

• Supportive team and structured onboarding

   

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 client:
Our client began its operations in 1996, originally manufacturing metal and glass architectural structures. Today, the company is a high-tech manufacturing complex that designs and produces turnstiles, road blockers, bollards, fireproof doors, gates, and hatches. The company has international offices in Kyiv, London, and Dubai, with 23 official brand representatives worldwide and a portfolio of 30,000+ completed projects across more than 100 countries.

About the role:
We are looking for a Lead Marketing Specialist to provide strategic leadership for the marketing team and processes, aimed at strengthening brand awareness globally. The primary focus is on building end-to-end analytics, implementing a unified communication strategy, and scaling client acquisition channels.

Requirements:
- 3+ years of experience in a marketing leadership role.
- Strong leadership skills and the ability to communicate effectively with a team.
- Hands-on experience in B2B markets with a deep understanding of client acquisition and retention tools.
- Proven track record in building and managing high-performing teams.
- Experience with digital tools (performance marketing, CRM, automation).
- Solid understanding of branding, positioning, and product management.
- Proactive, responsible, and result-oriented mindset.
- English proficiency at B1+ level or higher.

Key Responsibilities:
- Managing the marketing team and external contractors.
- Developing and implementing the company's overall marketing strategy.
- Team building, goal setting, and marketing performance management.
- Overseeing and managing operational marketing processes.
- Analyzing the market, competitors, and user behavior.
- Maintaining current communication channels and developing new ones.
- Boosting brand awareness in the international market.
- Preparing for participation in international exhibitions and industry events.
- Supporting and optimizing company websites.
- Maintaining a unified communication strategy (PR, Content, SMM, Websites).
- Establishing a KPI system and end-to-end analytics to evaluate marketing effectiveness.

What the client offers:
- Timely salary payments (twice a month).
- Official employment in accordance with Ukrainian legislation.
- Free shuttle service from Kharkivska metro station (Location: Bortnychi district, Kyiv).
- Access to a free gym.
- On-site meals at corporate rates (partially subsidized by the company)

Are you passionate about frontend development and ready to take your first steps in a real-world project environment? Join our internship program and grow your skills in Angular, TypeScript, and modern web development!
 

For this internship, you need to have:

• Good knowledge of JavaScript/TypeScript;
• Basic practical skills in Angular 12+;
• In-depth theoretical knowledge of HTML/CSS/SCSS, including (Flex/Grid);
• In-depth understanding of Git and RestAPI;
• Analytical mindset;
• Ability to collaborate effectively in a team;
• Upper-Intermediate English level (both written and spoken).

Preferred to have:

• Understanding of TypeScript basics (union types, generic types);
• In-depth knowledge of Angular: understanding basic principles (RxJS operators, Directives/Pipe, Routes, Detection Strategy), a good understanding of Lifehooks in Angular.

Our selection process includes:

• HR interview;
• Tech interview;
• Final interview with the founders of the company.

We offer:

• Internship schedule: Monday to Friday, 10.00−19.00
• Office-based / remote work;
• No time trackers or other bureaucratic measures;
• Practical experience on internal projects;
• Networking with experienced professionals willing to share their knowledge and experience;
• Opportunity to obtain a contract with HYS Enterprise as a Junior specialist.
• Gifts for birthdays and professional holidays;
• Interaction with experienced professionals willing to share their knowledge;
• Participation in internal and external events.

We are looking for an enthusiastic and proactive Intern .NET + Angular Developer to join our dynamic team!

Requirements:
— Solid understanding of object-oriented programming (OOP);
— Good knowledge of C#, .Net Standard, .NET 6+, ASP Web API;
— Basic knowledge of Unit testing;
— Basic knowledge of MSSQL;
— Knowledge of Angular(React) + TypeScript;
— Upper-Intermediate English level (both written and spoken);
— Proficiency with Source Control tools such as Git.

Would be a plus:
— Basic understanding of GoF Design Patterns;
— Understanding of microservice architecture;
— Containerization (basics of Docker/Kubernetes) + Azure;
— Attention to details;
— Practice experience in pet projects.

Responsibilities:
— Develop project functionalities;
— Manage databases with MS SQL;
— Implement frontend features with Angular.

We offer:
— 3-month Internship schedule: Monday to Friday, 10.00-19.00;
— Office-based/remote work;
— No time trackers or other bureaucratic measures;
— Practical experience on internal projects;
— Networking with experienced professionals willing to share their knowledge and experience;
— Opportunity to obtain a contract with HYS Enterprise as a Junior specialist;
— Gifts for birthdays and professional holidays;
— Participation in internal and external events.
Upon successful completion of the internship and mutual agreement to proceed with a contract, the candidate is expected to commit to working with us for a minimum of one year.

About ChatRevenue.ai 

ChatRevenue.ai was founded by Ratmir Timashev (founder of Veeam) and Vlad Voskresensky (founder of Revenue Grid). 

We are building an agentic sales automation for post-CRM era. The AI-native product combines structured and unstructured data, LLM workflows, and agentic automation to help sales people to focus properly, work more efficiently and automate repetitive sales processes. 

The product is already being tested by early customers. We are growing the core engineering team and looking for people who want to work on real product systems with direct impact on architecture, quality, and speed of delivery. 

About the role 

We are looking for a Senior Generative AI Engineer with 5+ years of commercial Python experience and hands-on experience building production GenAI / RAG systems. 

This is a hands-on engineering role focused on: 

• Python backend  
• LLMs and RAG  
• AI Copilot / assistant workflows  

We are looking for someone who can take a problem, propose a practical solution, and move it to production. 

What you will do 

• Design, build, deploy, and maintain production GenAI / RAG pipelines  
• Integrate LLMs and agentic assistants into product workflows  
• Improve latency, reliability, scalability, and cost-efficiency of AI systems  
• Evaluate and implement new GenAI, multi-agent, and orchestration frameworks  
• Contribute to architecture and technical decisions across the platform  

What we are looking for 

• 5+ years of commercial Python experience 
• Strong backend experience with FastAPI, APIs, webhooks, Docker, Kubernetes, Git, and CI/CD 
• Commercial experience with LLMs in production 
• Strong hands-on experience with RAG, retrieval workflows, embeddings, and vector search 
• Experience with LangChain, LangGraph, LangSmith, or similar frameworks 
• Good knowledge of SQL, Pandas, ETL, data cleaning, and ingestion pipelines 
• English: B2 or higher 
• High ownership, independence, and product mindset 

Nice to have 

• Multi-agent LLM systems 
• Knowledge graphs, graph databases, or graph-based retrieval 
• Kafka, Azure Event Hub, or other event-driven systems 
• Azure cloud infrastructure 
• Production ML / NLP systems 
• Evaluation, tracing, observability, and optimization of AI pipelines 
• Graph algorithms or tools like NetworkX 

What we offer 

• Remote-first setup 
• Flexible schedule aligned with European time zones 
• A core engineering role in an AI-native product 
• Direct influence on technical decisions and architecture 
• Real ownership and visible product impact 

If you have strong Python backend fundamentals and real production GenAI / RAG experience, we’d love to talk. 

About the project

US-founded media company operating email newsletters at scale – millions of subscribers across finance, health, and business verticals. Small engineering team, flat structure, direct ownership, fast iteration. No layers of approval, no large org to navigate.

You'll own the integration and infrastructure layer alongside a counterpart engineer who handles the AI and automation side. The AI systems depend on what you build staying reliable.
 

What you'll work on

• Custom CRMs and operational tools tailored to internal workflows
• Browser automation pipelines with Playwright for interacting with and validating UI workflows
• Distributed automation infrastructure: proxy management, session handling, request routing
• PostgreSQL data models and pipelines that AI systems and operational teams depend on
• Integrations with third-party APIs and platforms – including ones with inconsistent or undocumented APIs
   

Requirements

• 6+ years of backend development
• 4+ years of production Python
• Strong PostgreSQL: schema design, indexing, query optimization – not just ORM usage
• Hands-on Playwright or equivalent (Selenium, Puppeteer) for real browser automation
• Experience with proxy infrastructure: rotation, health checking, geographic routing
   

Tech stack

Python · FastAPI · PostgreSQL · Playwright · Docker · proxy infrastructure · REST APIs and webhooks · third-party platform integrations
 

Conditions

• B2B contract, full-time
• Warsaw office (onsite preferred, remote considered)
• Direct collaboration with technical PM and small senior team
• Fast-moving environment: ambiguity, shifting priorities, growing scope

About the project
 

US-founded media company operating email newsletters at scale – millions of subscribers across finance, health, and business verticals. Small engineering team, flat structure, direct ownership, fast iteration. No layers of approval, no large org to navigate.

You'll own the AI layer of the automation platform alongside a counterpart engineer who handles integration and infrastructure.
 

What you'll work on

• AI-driven content generation and management workflows at production scale
• Agent systems coordinating multi-step operational tasks: content, QA, validation, reporting
• RAG pipelines over internal knowledge bases and operational data
• Prompt architectures designed for reliability, cost control, and measurable output quality
• Evaluation and regression testing for LLM systems — "it looked fine when I tested it" isn't good enough
   

Real production systems, not demos. The work removes hours of manual operational work daily and needs to be reliable enough that people actually trust it.
 

Requirements

• 6+ years of development experience
• 4+ years of production Python
• 2+ years shipping production systems with LLMs and agents
• Solid understanding of what happens underneath the frameworks: tokenization, context windows, function calling, when RAG helps and when it doesn't
• Hands-on with agent orchestration: LangChain, LangGraph, MCP, or equivalent
• Clean, maintainable Python – frameworks support your thinking, not replace it
   

Tech stack

Python · FastAPI · PostgreSQL · LLM APIs (OpenAI, Anthropic) · LangChain / LangGraph / MCP · vector databases · Playwright · Docker · proxy infrastructure
 

Conditions

• B2B contract, full-time
• Warsaw office (onsite preferred, remote considered)
• Direct collaboration with technical PM and small senior team
• Fast-moving environment: ambiguity, shifting priorities, growing scope

Responsibilities:

 • Develop, configure, and maintain CI/CD pipelines using modern automation tools.

 • Deploy and manage applications in Kubernetes, including working with Helm Charts.

 • Implement and support GitOps practices for managing infrastructure and applications.

 • Set up and maintain monitoring and alerting systems based on Grafana/Prometheus.

 • Integrate and manage processes with GitHub Actions.

 • Work with infrastructure management and orchestration tools such as ArgoCD.

Requirements:

 • Experience with Kubernetes and a solid understanding of its components.

 • Knowledge of Infrastructure as Code (IaC) tools (Terraform, Ansible).

 • Proficient in Helm Charts: creating and maintaining templates.

 • Hands-on experience with ArgoCD.

 • Strong knowledge of GitOps principles and experience applying them in projects.

 • Expertise in developing and configuring CI/CD pipelines using GitHub Actions.

 • Experience with monitoring and data analysis tools such as Grafana/Prometheus.

 • Familiarity with containerization (Docker) and orchestration.

 • Proficient in Git and common commands for repository management.

Nice-to-Have:

 • Experience with other CI/CD tools (Jenkins, GitLab CI, CircleCI).

 • Familiarity with cloud platforms (AWS, GCP, Azure).

 • Scripting skills in Bash, Python, or other programming languages.

• English

WHAT WE OFFER:

• Flat hierarchies in a collegial team

• Attractive remuneration

• Short and fast decision paths through approachable executives

• Challenging tasks and personal responsibility from day one

• Interesting career prospects with exciting development opportunities

• Learning and letting others learn: We actively help our employees to develop themselves

ABOUT US:
Our Mission: Empowering Your Digital Transformation

Our DevOps as a Service offering provides a comprehensive range of solutions, meticulously tailored to meet the unique requirements of each client. We specialize in streamlining development and operations, automating workflows, and enabling scalable, secure, and efficient infrastructure.

Devops -Keep it for us!

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 client:
The company is on a mission to make the world’s industrial environments safer with technology solutions and to drive a paradigm shift in safety from reactive to proactive approaches to reduce the risk of industrial accidents. The team in Ukraine is developing the future of industrial safety based on machine learning, computer vision, and IoT.

About the role: 
We are looking for a Software Engineer to build high-throughput data pipelines and shared memory infrastructure. In this role, you will work with Python (3.11+) and ZeroMQ focusing on low-latency IPC, efficient memory management, and scaling our real-time processor ecosystem.

Responsibilities:
- Develop and optimize the Pipeline Engine (Python DAG orchestrator).
- Maintain shared memory pools (C library + Python/Go bindings).
- Manage the ZeroMQ IPC layer and FlatBuffers metadata serialization.
- Enhance the ProcessorWrapper infrastructure.

Must-have:
- Senior-level Python 3.11+: Deep understanding of concurrency, multiprocessing, GIL behavior, and memory management.
- Linux Systems Programming: Hands-on experience with /dev/shm, process isolation, file descriptors, and signals.
- Docker: Proficiency in containerized environments.

Nice to have:
- CUDA Basics: Experience with GPU memory management (IPC handles, stream sync, CPU↔GPU transfers).
- C/C++: Knowledge of POSIX shm, lock-free structures (atomic CAS), and pybind11/ctypes bindings.
- ZeroMQ & FlatBuffers: Familiarity with PUSH/PULL, PUB/SUB patterns, and zero-copy schema design.
- Computer Vision: Experience with OpenCV or CV-CUDA (nvcv).
- Optimization & RPC: Interest in TensorRT (YOLO optimization) and Connect RPC (Buf ecosystem).
- Domain Expertise: Background in building developer tools for ML pipelines, robotics, or real-time video systems.

The client offers:
- Good compensation;
- Benefit package;
- Strong team and career growth;
- Challenges every day!

Product Manager – AI & Geospatial Platform (Data Science & Platform/API)
 

We build large-scale property intelligence using AI and aerial imagery, supporting clients with data-driven decision-making.

We’re looking for a Product Manager to lead a cross-functional product spanning two domains:
- Data Science (research-driven models)
- Platform & APIs (customer-facing systems)

This role requires balancing long-term research with fast product execution, aligning multiple teams, and delivering measurable value to customers.
 

Responsibilities: 
 

Product Leadership

- Product Strategy & Roadmap: Define and drive roadmap across Data Science and Platform/API domains.
- Product Discovery: Understand customer needs, market trends, and competition.
- Lifecycle Ownership: Own product from discovery to delivery and iteration.

Execution

- Sprint & Delivery Management: Plan sprints and track execution.
- Cross-functional Alignment: Coordinate engineering, data science, design, and business teams.
- Solution Definition: Translate technical capabilities into product requirements.

Customer & Stakeholders

- Client Engagement: Gather requirements and validate solutions.
- Stakeholder Management: Align internal stakeholders.

Data Science Domain

- Research Collaboration with AI/DS teams.
- Model Productization into scalable features.
- Prioritize research based on impact.

Platform & API

- Drive execution and releases.
- Improve performance, scalability, reliability.
- Collaborate on UX.
- Deliver customer-facing value via APIs and platform.

Job Description

• 4+ years of development experience with the .NET platform.
• Experience with ASP.NET Core Web API, SOA, Cloud Services (AWS).
• Experience with React. Patterns: SPA, Micro Frontend Architecture (is a plus)
• TypeScript development experience.
• Experience in client/server unit testing.
• Experience with gRPC is a plus
• Experience with AWS infrastructure is a plus: S3, Lambda (Python Runtime)
• Good debugging, coding, and design skills.
• Demonstrated ability to come up-to-speed quickly on a new technical domain/product area.

• Good written and verbal communication skills.

   

Job Responsibilities

• Implement new features, unit tests, automated integration tests for the complex healthcare system
• Participate in estimation and planning sessions
• Investigate different complexity issues and debug code
• Business communication and close collaboration with all project stakeholders on a daily basis
   

Department/Project Description

Our client is a big medical equipment manufacturer located in the United States. We have completed a lot of projects for them during the last 18+ years and continue our strong relationship. We are creating software information systems providing management and reporting capabilities for customer equipment in the field. Currently, we are extending our team and looking for a passionate and motivated Middle to Senior Full Stack .Net Engineer with 4+ years of relevant experience. The right candidate must be a team player with strong communication skills and be comfortable working in a fast-paced environment.
 

Skill Category

.NET
 

Keyskills - Must Have

• .NET
• ASP.NET
• React