Jobs at Djinni

Position overview

DataArt is a global software engineering firm and a trusted technology partner for market leaders and visionaries. Our world-class team designs and engineers data-driven, cloud-native solutions to deliver immediate and enduring business value.

We promote a culture of radical respect, prioritizing your personal well-being as much as your expertise. We stand firmly against prejudice and inequality, valuing each of our employees equally.

We respect the autonomy of others before all else, offering remote, onsite, and hybrid work options. Our Learning and development centers, R&D labs, and mentorship programs encourage professional growth.

Our long-term approach to collaboration with clients and colleagues alike focuses on building partnerships that extend beyond one-off projects. We provide the ability to switch between projects and technology stacks, creating opportunities for exploration through our learning and networking systems to advance your career.

Gain practical experience, enhance your skills, and master independent work on real IT projects.
Demonstrate your expertise during the trial period, and if you meet the professional standards, you’ll earn the Junior QA qualification—with the opportunity to join DataArt full-time.

Requirements

• Basic knowledge of manual testing (types of tests, methodologies of organizing testing processes, test design techniques)
• Basic knowledge of databases and skills working with at least one of database management systems (one of the following: MSSQL, Oracle, MySQL, PostgreSQL, etc.)
• Good interpersonal skills
• Excellent spoken English

Nice to have

• Practical and/or theoretical knowledge of API and mobile testing

We are looking for a skilled Middle Manual QA Engineer.

✅ Requirements:

✔️ 2+ years of related work experience

✔️ Solid knowledge of testing processes, methodologies, and standards

✔️ Experience in web projects testing

✔️ Experience in defining scope of testing, developing testing approach

✔️ Attentive to detail, analytical skills, and a scientific approach to problem-solving

✔️ Basic SQL knowledge

✔️ Strong verbal/written communication & an excellent attention to detail

✔️ Knowledge of JIRA and/or similar bug tracking tools

✔️ Experience in test documentation creation and maintenance experience in defining scope of testing, test plan, writing test cases,

✔️ Intermediate+ level of English (both verbal and written)

✅ Will be a plus 

✔️ Experience in I18n,l10n testing 

✔️ Experience in API testing

✔️ Knowledge of Azure Data Factory

✅ Duties and opportunities

✔️ Manual testing of web applications

✔️ Defects management in the bug-tracking system

✔️ Test documentation management

✔️ Collaboration with project team

Project Description

The project is a high-load DeFi infrastructure focused on building scalable, reliable backend services for financial and Web3 products. The team develops and maintains a microservices-based architecture that powers core platform functionality and public APIs used by both internal services and external integrators. The system is designed for high performance, low latency, and strong operational stability in a blockchain-driven environment.

Responsibilities

• Develop and maintain scalable backend microservices using Node.js and Nest.js
• Design and implement high-performance, low-latency APIs
• Ensure system reliability through monitoring of technical and business metrics (uptime, error rates, etc.)
• Perform system profiling and optimize database queries for high throughput
• Write clean, well-documented code in compliance with internal standards and guidelines
• Set up and maintain alerting systems; participate in incident detection and mitigation
• Take part in code reviews, architecture discussions, and agile sprint planning
• Collaborate closely with cross-functional teams

• Continuously evaluate and introduce new tools and technologies to improve system performance and team efficiency

   

Requirements

• Proven experience in fintech, DeFi, or cryptocurrency domains
• Hands-on experience building high-load microservices architectures
• Advanced proficiency in Node.js and TypeScript
• Strong SQL knowledge and hands-on experience with PostgreSQL
• Familiarity with Redis and message brokers (e.g. NATS, EMQX, Kafka)
• Experience with monitoring tools such as Prometheus and Grafana
• Solid understanding of blockchain fundamentals, Web3 concepts, and Solidity
• Basic DevOps knowledge: CI/CD pipelines, Docker, Kubernetes fundamentals
• Experience configuring metrics pipelines and alerting systems
• Experience working in Scrum-based environments with a structured, enterprise-oriented approach
• Strong communication skills, proactive mindset, and problem-solving attitude

• Willingness to work in a hybrid format (at least 3 days per week on-site)

   

Nice to Have

• Deep hands-on experience with or advanced knowledge of Nest.js
• Strong understanding of event-driven architecture and asynchronous communication patterns
• Experience with Web3 tooling such as ethers.js or web3.js for blockchain interactions

Our Customer:

Our client is a forward-thinking early-stage startup creating next-generation GPU efficiency solutions and developing performance layers for AI and LLM workloads.

Your tasks:

• Design and enhance GPU software infrastructure.
• Work with CUDA, OpenCL, ROCm, and LLVM to boost computational performance.
  Drive code compilation and transformation workflows from CPU to GPU.
• Develop scalable high-performance computing and AI infrastructure layers.
  Collaborate with top-tier engineers across GPU, AI, and compiler domains.

Required Experience and Skills:

• 5+ years of hands-on experience working with GPU, compiler, or HPC technologies.
• Strong expertise in performance tuning, GPU memory management, and computer architecture.
• Expertise and passion for performance, latency, and optimization.
• Would be a plus:
  Experience with HPC, LLM systems, or AI infrastructure.

Working conditions

• 5-day working week, 8-hour working day;
• Remote work.

We are looking for an experienced SQL Server DBA / Developer to join our client’s team in an outstaffing model. This role is critical for maintaining high availability, performance, and security of production SQL Server environments. The ideal candidate is hands-on, calm under pressure, and deeply understands how SQL Server behaves in real-world, high-load systems.

Details

Engagement Type: Long-term cooperation

Workload: Full-time

Location: Remote

Start Date: ASAP

Language: English

Key Responsibilities

Administer, support, and optimize Microsoft SQL Server production environments

Manage backup and restore strategies, including disaster recovery readiness

Monitor system workload and perform performance tuning

Diagnose and resolve performance bottlenecks, deadlocks, and concurrency issues

Handle production incidents, including root cause analysis and preventive actions

Implement and maintain security controls (logins, roles, permissions, auditing)

Support database deployments, upgrades, and maintenance activities

Work closely with developers and infrastructure teams to ensure system stability

Requirements

Strong, hands-on experience with MS SQL Server

Deep knowledge of:

- Backups & restores

- Workload monitoring and tuning

- Query and index optimization

- Deadlocks and concurrency management

- SQL Server security (logins, roles, auditing)

Proven experience in production support environments

Ability to work effectively under pressure and handle critical incidents

Good spoken and written English

Nice to Have

Experience in high-availability or high-load environments

Automation or scripting for DBA tasks

Prior experience working in an outstaffing or client-facing model

We are a consulting company operating in the finance and cryptocurrency sector. We have an open remote position of Junior Dealer/Risk Monitoring Manager.

Job Details:
 

Location: The candidate must be located in Ukraine, as the company provides work equipment (laptop).

Working Hours: Monday to Friday, 9 hours per day, Weekly Shifts 07:00-16:00, 09:00 – 18:00, 15:00-00:00
Vacation - unpaid.

Main Responsibilities 
•    Daily management and monitoring of the Trading Platforms to ensure their smooth operation 
•    Performing routine monitoring tasks to ascertain system performance
•    Reviewing client accounts upon requests relating to trading activity and/or platform performance and providing resolution for such inquiries 
•    Execution of client orders and assisting clients with inquiries in line with company policy and procedures
•    Responsible for running complex reporting and its analysis as required by company management 
•    Answering tickets in company’s systems.

Main Requirements 
•    Bachelor's degree in mathematics, Economics, Finance or any other relevant field (advantage)
•    Previous work experience in a similar role and especially in dealing room (advantage)
•    Good knowledge of Microsoft Excel (advantage)
•    B2+ English, both oral and written (must)

For more details, we can discuss via phone call or online interview.

YozmaTech isn’t just another tech company – we’re a global team of go-getters, innovators, and A-players helping startups and product companies scale smarter and faster. We build dedicated development teams across 10+ countries, creating strong, long-term partnerships based on trust, transparency, and real impact. Here, every idea counts. We value people who are proactive, open-minded, and ready to grow. If you’re passionate about building meaningful products and want to join a team that feels like family – you’ll feel right at home with us.

Our client is an early-stage US health & longevity startup building an iOS-first medical platform for clinicians and clinics. The product focuses on creating a holistic, data-driven view of patient health by integrating Apple HealthKit, wearable devices, and medical sensors, with AI used to turn this data into meaningful clinical insights. The team is small and senior, combining engineering expertise with real medical background. This is a true early-stage environment where engineers have ownership, influence architectural decisions, and work closely with product, AI, and medical experts. The culture is technically strong, open, and pragmatic — focused on building quality solutions while moving fast. We are looking for an iOS Developer to work on core product development, HealthKit integrations, and scalable iOS architecture. This role offers real impact, autonomy, and the opportunity to help shape a medical product from the ground up.

Key Requirements:

🔹 5+ years of experience in iOS development, primarily with Swift;
🔹 Strong hands-on experience with SwiftUI;
🔹 Good eye for UI/UX and attention to detail in mobile interfaces;
🔹Solid understanding of iOS architecture patterns (e.g. MVVM) and clean code principles;
🔹 Strong knowledge of memory management and concurrency in iOS;
🔹 Experience with CI/CD pipelines and the App Store release process;
🔹 Experience integrating Apple HealthKit and working with health-related iOS APIs;
🔹 Ability to work with data-heavy mobile applications, including syncing large datasets with backend services;
🔹 Understanding of offline-first mobile architecture and background data processing;
🔹 Familiarity with cloud-based systems (AWS) and backend communication;
🔹 Basic understanding of machine learning / AI concepts and how mobile apps interact with ML-driven systems;
🔹 Experience collaborating with backend services (Python / Node.js) is a strong plus;
🔹 Familiarity with DevOps practices (e.g. CI/CD, infrastructure basics; Terraform is a plus);
🔹 English – Upper-Intermediate or higher.

What you will do:

🔹 Design and develop the core iOS application for a health and longevity medical platform used by clinicians and patients; 🔹 Build and maintain deep integrations with Apple HealthKit, wearable devices, and medical sensors (including smartwatches and glucose monitors);
🔹 Work with complex, data-heavy health datasets, ensuring accurate collection, processing, synchronization, and offline availability;
🔹 Collaborate closely with backend, AI/ML engineers, and medical experts to transform raw health data into meaningful insights and recommendations;
🔹 Take ownership of iOS architecture, performance, and scalability, contributing to technical decisions from early stages;
🔹 Implement and improve offline-first and background data processing scenarios;
🔹 Ensure data security, privacy, and reliability in a regulated medical environment;
🔹 Troubleshoot complex technical issues related to data integrity, performance, and device integrations;
🔹 Actively participate in product discussions, proposing technical solutions and improvements rather than just executing tasks;
🔹 Contribute to testing, stability, and continuous improvement of the mobile application;

Interview stages:

🔹 HR Interview;
🔹 Combined Initial Conversation and Design Interview: A 1-1.5 hour session that combines the initial conversation and design interview;
🔹 Coding Exercise: A coding exercise to evaluate the candidate's coding skills and ability to write clean, efficient code;
🔹 Reference Check;
🔹 Offer.

Freshcode is expanding the team that builds an all-in-one cloud platform for clinics. We are looking for a Clojure Engineer with 4+ years of commercial experience with Clojure and spoken English.
 

Who are we?

At Freshcode, we are passionate about functional programming — especially Clojure. We have more than 10 projects involving 15+ developers from different countries. Our company has a Clojure expertise center where our Clojure developers share their knowledge and experience. Additionally, we continuously sponsor various industry conferences and actively participate in the community, helping it grow and evolve.

Currently, our Clojure team is working on projects in domains such as FinTech, Healthcare, Data Science, and others. Right now, we are actively looking for developers for one of these projects.
 

About the project: A cloud platform for hospitals designed to assess the value of new medical technologies. It combines workflow coordination, project management, financial analysis, and evidence-based clinical decision support in a single solution, as well as a comprehensive product knowledge base.
 

Tech stack: Clojure, ClojureScript, re-frame, Pedestal, Integrant, Malli, Datomic, Redis, Elasticsearch, Keycloak, LaunchDarkly, AWS (S3, SQS, SSM, Textract).
 

Team: 40+ developers, QA Engineer, Team Lead.
 

Responsibilities:

– Full-stack development: design, implementation, and testing of features

– Maintaining and improving existing functionality: bug fixing and performance optimization

– Determining operational feasibility by evaluating analysis, problem definition, requirements, solution development, and proposed solutions

– Communication with the Team Lead and the team
 

We find important:

– 4+ years of commercial experience with Clojure

– Experience with ClojureScript

– Experience with AWS

– Upper-Intermediate or higher level of English
 

Would be a plus:

– Experience with Datomic

– Experience using the Pedestal web framework

– Experience with Babashka
 

We offer:

– Remote work

– Flexible working hours: you can start your working day between 9:00 and 12:00

– No time trackers

– Paid vacation (15 working days) and sick leave (10 working days)

– Internal Clojure Community
 

Interview stages:

1. Interview with the company Recruiter and English proficiency check (up to 60 min)
2. Technical interview with a Senior Clojure Developer (90–120 min)
3. Technical interview with the Client (up to 90 min)

We are looking for a passionate User Acquisition Manager (Meta Ads, Web2Web) to join us and make our products greater!

What to do:

• Design, launch, optimize and analyze Facebook Ads campaigns (both creative testing and scale campaigns);
• Design & implement ad automation via internal tools or Bir.ch (ex-RevealBot);
• Test alternative paid channels with self-service Ad Cabinets;
• Help product marketing team with Web Funnels ideation and reporting;
• Help creative production team with Creative testing approach ideation and reporting;

What will help to achieve success:

• Strong proven track record for managing big ad spends on Tier-1 market;
• Ad automation experience;
• Web Funnels experience;
• B2C subscription app experience;
• Proficiency in English — B2 or higher level;

Fireart Studio is on the lookout for a passionate and motivated Lead Generation Specialist to join our team!

If you have a knack for finding new business opportunities, love connecting with people, and want to be part of a fast-growing international design & tech studio — let’s talk! 🙌

💼 What You’ll Be Doing:

• Develop and execute lead generation strategies to acquire high-quality B2B leads in the software development space.
• Identify and research target markets, ideal customer profiles, and key decision-makers.
• Use various lead generation techniques, including email outreach, LinkedIn prospecting and paid campaigns.
• Manage and optimize lead generation tools (e.g., LinkedIn Sales Navigator, Apollo.io, HubSpot, etc.).
• Build and maintain prospect databases, ensuring accurate and up-to-date records.
• Qualify leads through initial outreach, ensuring a seamless handoff to the sales team.
• Analyze lead generation performance metrics and continuously optimize strategies to improve conversion rates.
• Collaborate with the marketing team to align lead generation activities with broader campaign efforts.
• Stay up to date with industry trends, competitor strategies, and emerging lead generation techniques.

🧠 We’re Looking For:

• 3+ years of experience in B2B lead generation, preferably in the IT services or software development industry.
• Proven track record of generating high-quality leads and meeting or exceeding KPIs.
• Strong knowledge of outbound sales techniques, prospecting tools, and CRM systems.
• Experience with LinkedIn outreach, email automation strategies.
• Excellent communication and interpersonal skills, with the ability to engage and persuade potential clients.
• Analytical mindset with experience in tracking and optimizing lead generation campaigns.
• Self-motivated, results-driven, and able to work independently as well as in a team.
• Familiarity with digital marketing strategies and their impact on lead generation is a plus.
• Please note that we are looking for a teammate who will join an English-speaking environment, so we expect the candidate to have at least a B2 level of spoken English, as they will be working in an English-speaking team.

Nice to Have:

• Experience in using AI-powered lead generation tools.
• Understanding of SEO, content marketing, and paid advertising.
• Prior experience working in a fast-paced startup or agency environment.

💰 What We Offer:

💸 Competitive compensation based on experience and skills

👭 A friendly and supportive team

🤒 Paid sick leave

🌴 21 working days of paid vacation, plus all Polish national holidays

🎉 Corporate events and team activities

🩺 Private medical care (for residents in Poland)

🧩 Opportunities for continuous learning and professional growth

🧡 Why Join Fireart:

• We’re growing every day and expanding our client base, offering a variety of exciting projects
• We avoid micromanagement and trust in the professionalism of our team
• You’ll always have support from your teammates — no one is left to figure things out alone
• Our collaborative and creative atmosphere makes Fireart a great place to grow

🧩 Our 3-Step Recruitment Process:

• Interview with our Recruitment Specialist
• Test Task
• Interview with our Account Executive

If you're passionate about sales and excited to work with a global creative team — we’d love to hear from you! 🎯

About the role:
We are looking for a Data Analyst to join a team working with advertising products and digital platforms.
 

Responsibilities:

• Collect, validate, and analyze data from advertising campaigns and products
• Prepare reports and dashboards for the team and stakeholders
• Look for insights in data: what works, what doesn’t, and why
• Help improve performance metrics (CTR, CPA, ROI, etc.)
• Work with large volumes of data from multiple sources
• Participate in defining tracking and analytics requirements
• Help automate reporting and routine processes
   

Requirements:

• 1+ year of experience working with data
• Experience with BI tools (Tableau / Power BI / Looker / Metabase, etc.)
• Experience with ClickHouse / BigQuery / Redshift or other analytical databases
• Strong skills in Python or R for data analysis
• Strong SQL skills
• Experience in AdTech / MarTech / digital marketing

About the client:

Our customer is the European online car market, with over 30 million monthly users and a presence in 18 countries. As a Lead FullStack Engineer, you will play a pivotal role in shaping the future of online car markets and enhancing the user experience for millions of car buyers and sellers.
 

Responsibilities:

• Developing fast, high-traffic public-facing websites
• Explore new technologies and help the team to use them
• Work using AI tools and apply them to the SDLC
• Following software development best practices while delivering the work
• Following testing principles while testing your own code to ensure production readiness
• Follow the philosophy of: you-build-it-you-run-it (be responsible for the SDLC processes) 
   

Requirements: 

• 5+ years developing reliable, highly available, and scalable software systems
• Strong understanding of software architecture and design patterns
• Firm grasp of clean code principles and coding standards
• Strong proficiency using AI tooling, such as ChatGPT/Codex, for rapid development
• Experience integrating AI tooling into your development environment for streamlined usage
• Experience with AI Frameworks like Vercel AI SDK, LangChain, etc.
• Strong proficiency with the following technologies: C#+Typescript
• Strong proficiency with SQL & NoSQL datastores (GraphQL, Redis)
• Strong proficiency with frontend development (HTML, CSS, JavaScript)
• Strong proficiency with component-based frameworks and SSR (Next.js/React or Vue.js) or Angular with the desire to learn React/ Vue.js.
• Hands-on experience developing and maintaining 3rd party content management systems
• Knowledge of modern cloud infrastructures and tools, such as AWS, Terraform, and Docker
• Experience with APIs and developing in a service-based application environment
• Experience building optimized UIs for performance
• Proficiency with version control systems such as Git
• Experience working within a formal CI/CD pipeline
• Experience with logging, monitoring, and alerting services like Datadog, Newrelic
• Solid approach to testing and ensuring quality of code, Unit testing, backend, and frontend
• At least Upper-intermediate English level
• This role requires mandatory timezone coverage: work must align with the Toronto (ET) timezone for LATAM hours and 13:00–21:00 EET for EU hours approximately.

About the client:

Our customer is the European online car market, with over 30 million monthly users and a presence in 18 countries. As a Senior FullStack Engineer, you will play a pivotal role in shaping the future of online car markets and enhancing the user experience for millions of car buyers and sellers.
 

Responsibilities:

• Developing fast, high-traffic public-facing websites
• Explore new technologies and help the team to use them
• Work using AI tools and apply them to the SDLC
• Following software development best practices while delivering the work
• Following testing principles while testing your own code to ensure production readiness
• Follow the philosophy of: you-build-it-you-run-it (be responsible for the SDLC processes) 
   

Requirements: 

• 4+ years developing reliable, highly available, and scalable software systems
• Strong understanding of software architecture and design patterns
• Firm grasp of clean code principles and coding standards
• Strong proficiency using AI tooling, such as ChatGPT/Codex, for rapid development
• Experience integrating AI tooling into your development environment for streamlined usage
• Experience with AI Frameworks like Vercel AI SDK, LangChain, etc.
• Strong proficiency with backend development (Typescript, Node.js, C#)
• Strong proficiency with SQL & NoSQL datastores (GraphQL, Redis)
• Strong proficiency with frontend development (HTML, CSS, JavaScript)
• Strong proficiency with component-based frameworks and SSR (Next.js/React, Vue.js, Angular)
• Hands-on experience developing and maintaining 3rd party content management systems
• Knowledge of modern cloud infrastructures and tools, such as AWS, Terraform, and Docker
• Experience with APIs and developing in a service-based application environment
• Experience building optimized UIs for performance
• Proficiency with version control systems such as Git
• Experience working within a formal CI/CD pipeline
• Experience with logging, monitoring, and alerting services like Datadog, Newrelic
• Solid approach to testing and ensuring quality of code, Unit testing, backend, and frontend
• At least Upper-intermediate English level
• Working for the North America timezone (ET) is preferable (till 21:00 Kyiv time)

Rock&Apps is looking for a talented and motivated Junior Affiliate Manager who wants to grow in a fast-moving product environment and become an essential part of our operations 🚀 

As we scale, we need someone who can keep our affiliate processes running smoothly, support offer management, and help the team stay focused on high-impact initiatives. 

You’ll play a key role in improving the team’s efficiency, ensuring clear communication with partners, and keeping our performance engine well-organized and moving forward.

Location: Warsaw. Office / Hybrid

Format: Full-time

Seniority: Junior (It doesn’t matter if you have prior experience — what matters is your willingness to learn and work)

What you’ll do

- Onboarding of new partners 

- Maintenance of efficient written and verbal communication with partners 

- Manage business negotiations with partners 

- Analysis of sales/profit amount’s fluctuation as well as competitors’ activity and reaching target KPIs

What we’re looking for

- High analytical skills and ability to work with the large amount of data

- High communication and presentation skills 

- Ability of constant self-educations

Extra points if you have

- Upper-intermediate+ English level 

- Previous experience working with traffic

What we offer

- A fast-growing environment with minimal bureaucracy 

- Support for professional development 

- 15 paid vacation days 

- 15 paid sick days 

- 5 paid days off 

- Benefit bar

About the Role:

We are a large iGaming holding with a team of 1,500+ professionals and a diverse portfolio of successful products across multiple markets. We are growing fast, continuously launching new directions, and expanding our ecosystem.

As part of this growth, we have recently launched our own crypto casino, and we are now looking for a VIP Manager to join the team.

In this role, you will be responsible for delivering a high level of personalized service to VIP and Pre-VIP players, building long-term relationships with high-value clients, and driving their activity, deposits, and retention. You will work with both existing and potential VIP players, including inactive and cold databases, motivating them to engage regularly through tailored communication and individual offers.
 

Responsibilities:

• Manage active and inactive VIP / Pre-VIP players: communication, retention, and reactivation
• Provide personalized support to high-value clients: consultations, assistance, and bonus offers
• Reactivate cold player databases via email, Telegram, WhatsApp, and calls
• Offer individual bonuses, reloads, cashback, and exclusive promotions within the approved VIP matrix
• Analyze player performance and behavior: deposits, bets, win/loss, frequency, and average check
• Monitor engagement levels and retention metrics
• Maintain daily statistics on active players, reactivations, deposits, and win/loss
• Collect feedback from VIP players and share insights with Product and Marketing teams

• Work closely with Support, Antifraud, Payments, and CRM teams to ensure fast and high-quality VIP service

   

Requirements:

• 2+ years of experience in VIP Management, Retention, or Account Management (iGaming, betting, or crypto is a strong advantage)
• Hands-on experience working with high-value clients and handling objections
• Confident use of Telegram, WhatsApp Business, and CRM systems
• Strong understanding of key metrics: Net Deposit, GGR, LTV, Retention D7/D30
• Excellent written and verbal communication skills
• English level B2+ (mandatory)
• Russian and/or Ukrainian — fluent

Working Schedule

• 5/2, shift-based schedule

• Availability to stay in touch during active player conversations when required

   

Why You Should Join Us

• Fast communication, zero micromanagement, and close collaboration with the executive team.
• Competitive compensation package with performance bonuses.
• Fully remote work
• Paid vacations, sick leave, and an extra day off on your birthday.
• Participation in leading iGaming conferences (SiGMA, ICE, iGB) and continuous investment in your professional growth.