Jobs at Djinni

About us:
Data Science UA is a service company with strong data science and AI expertise. Our journey began in 2016 with uniting top AI talents and organizing the first Data Science tech conference in Kyiv. Over the past 9 years, we have diligently fostered one of the largest Data Science & AI communities in Europe.

About the client:
Our client is an IT company that develops technological solutions and products to help companies reach their full potential and meet the needs of their users. The team comprises over 600 specialists in IT and Digital, with solid expertise in various technology stacks necessary for creating complex solutions.

About the role:
We are looking for an experienced Senior/Middle Data Scientist with a passion for Large Language Models (LLMs) and cutting-edge AI research. In this role, you will focus on designing and prototyping data preparation pipelines, collaborating closely with data engineers to transform your prototypes into scalable production pipelines, and actively developing model training pipelines with other talented data scientists. Your work will directly shape the quality and capabilities of the models by ensuring we feed them the highest-quality, most relevant data possible.

Requirements:
Education & Experience:
- 3+ years of experience in Data Science or Machine Learning, preferably with a focus on NLP.
- Proven experience in data preprocessing, cleaning, and feature engineering for large-scale datasets of unstructured data (text, code, documents, etc.).
- Advanced degree (Master’s or PhD) in Computer Science, Computational Linguistics, Machine Learning, or a related field is highly preferred.
NLP Expertise:
- Good knowledge of natural language processing techniques and algorithms.
- Hands-on experience with modern NLP approaches, including embedding models, semantic search, text classification, sequence tagging (NER), transformers/LLMs, RAGs.
- Familiarity with LLM training and fine-tuning techniques.
ML & Programming Skills:
- Proficiency in Python and common data science and NLP libraries (pandas, NumPy, scikit-learn, spaCy, NLTK, langdetect, fasttext).
- Strong experience with deep learning frameworks such as PyTorch or TensorFlow for building NLP models.
- Ability to write efficient, clean code and debug complex model issues.
Data & Analytics:
- Solid understanding of data analytics and statistics.
- Experience in experimental design, A/B testing, and statistical hypothesis testing to evaluate model performance.
- Comfortable working with large datasets, writing complex SQL queries, and using data visualization to inform decisions.
Deployment & Tools:
- Experience deploying machine learning models in production (e.g., using REST APIs or batch pipelines) and integrating with real-world applications.
- Familiarity with MLOps concepts and tools (version control for models/data, CI/CD for ML).
- Experience with cloud platforms (AWS, GCP, or Azure) and big data technologies (Spark, Hadoop, Ray, Dask) for scaling data processing or model training.
Communication & Personality:
- Experience working in a collaborative, cross-functional environment.
- Strong communication skills to convey complex ML results to non-technical stakeholders and to document methodologies clearly.
- Ability to rapidly prototype and iterate on ideas

Nice to have:
Advanced NLP/ML Techniques:
- Familiarity with evaluation metrics for language models (perplexity, BLEU, ROUGE, etc.) and with techniques for model optimization (quantization, knowledge distillation) to improve efficiency.
- Understanding of FineWeb2 or similar processing pipelines approach.
Research & Community:
- Publications in NLP/ML conferences or contributions to open-source NLP projects.
- Active participation in the AI community or demonstrated continuous learning (e.g., Kaggle competitions, research collaborations) indicating a passion for staying at the forefront of the field.
Domain & Language Knowledge:
- Familiarity with the Ukrainian language and context.
- Understanding of cultural and linguistic nuances that could inform model training and evaluation in a Ukrainian context.
- Knowledge of Ukrainian text sources and data sets, or experience with multilingual data processing, can be an advantage given the project’s focus.
MLOps & Infrastructure:
- Hands-on experience with containerization (Docker) and orchestration (Kubernetes) for ML, as well as ML workflow tools (MLflow, Airflow).
- Experience in working alongside MLOps engineers to streamline the deployment and monitoring of NLP models.
Problem-Solving:
- Innovative mindset with the ability to approach open-ended AI problems creatively.
- Comfort in a fast-paced R&D environment where you can adapt to new challenges, propose solutions, and drive them to implementation.

Responsibilities:
- Design, prototype, and validate data preparation and transformation steps for LLM training datasets, including cleaning and normalization of text, filtering of toxic content, de-duplication, de-noising, detection and deletion of personal data, etc.
- Formation of specific SFT/RLHF datasets from existing data, including data augmentation/labeling with LLM as teacher.
- Analyze large-scale raw text, code, and multimodal data sources for quality, coverage, and relevance.
- Develop heuristics, filtering rules, and cleaning techniques to maximize training data effectiveness.
- Collaborate with data engineers to hand over prototypes for automation and scaling.
- Research and develop best practices and novel techniques in LLM training pipelines.
- Monitor and evaluate data quality impact on model performance through experiments and benchmarks.
- Research and implement best practices in large-scale dataset creation for AI/ML models.
- Document methodologies and share insights with internal teams.

The company offers:
- Competitive salary.
- Equity options in a fast-growing AI company.
- Remote-friendly work culture.
- Opportunity to shape a product at the intersection of AI and human productivity.
- Work with a passionate, senior team building cutting-edge tech for real-world business use.

Requirements:
- 1+ years of experience in affiliate marketing or performance media buying (Gambling vertical is a must);
- Proven experience working with paid traffic sources, especially PPC (Google Ads) and Facebook Ads;
- Experience expanding and closing strategic deals with gambling brands;
- Knowledge of the main sources and specifics of various types of traffic and their effectiveness;
- Experience working with different geos, EU must;
- Familiarity with various pricing models: CPA, CPL, RevShare, Hybrid, Agency (Budget);
- Experience working both from the affiliate side and the brand/operator side is a strong advantage
- Upper Intermediate level of English;
- Accountable, initiative, proactive, strong communication skills,
- Atrong negotiation skills, problem solving skills, strategic thinking, analytical skills,
- Ability to endear himself/herself; presentability;

Responsibilities:
- Proactively seeks and onboards new partners and brands;
- Analyzes market competitors on a regular basis (websites, keywords, etc.) and suggests a plan of necessary actions to stay competitive;
- Negotiates mutually beneficial deals with partners and cultivate strong, lasting relationships;
- Generates and presents comprehensive reports with key strategic data to senior stakeholders;
- Implements initiatives to boost traffics growth, explore new growth opportunities, and enhance ROI;
- Continuously optimizes existing partnerships;
- Analyzes results and quality of traffic for further optimization of cooperation model with brands/partners;
- Develops and negotiates contracts, integrating their requirements into business operations;
- Coordinates closely with the Integration Manager and technical team to ensure smooth setup and tracking accuracy;
- Monitors campaign performance and rotates offers based on signals from analysts and market trends to maximize ROI and user engagement
- Represents the company at events and exhibitions;
- Ensures that weekly/monthly/quarterly KPIs are met and achieved;
- Mentors less experienced colleagues on demand;
- Maintains and shares professional knowledge within the team.

We Offer:
- Work in a professional team with transparent processes
- possibility of remote work;
- paid vacation — 21 working days;
- annual salary review;
- opportunity for career growth within the company.

As part of Genesis, a leading Ukrainian co-founding IT company, we are building a category-defining suite of AI companionship products (web/mobile), and our portfolio has shown exceptional growth over the past 9 months.
 

Our team is looking for an ambitious Senior PPC Manager to run large-scale advertising for a futuristic, fast-growing AI web application that has already successfully launched at Tier-1.

You will have the opportunity to lead the Google Ads team and create an effective traffic acquisition strategy from scratch, ensure positive profitability, and develop a system to scale quickly and sustainably to multi-million dollar budgets. 

About you:

• At least 4 years of experience as a PPC Specialist with excellent knowledge of Google Ads.
• Experience in dating or adult niches is must.
• Successful experience in running search campaigns, optimizing search traffic.
• Experience in launching and optimizing advertising campaigns for mobile applications (App campaigns).
• Understanding of the levers of influence on marketing metrics: CTR, CPC, CPA.
• English is not lower than Upper-Intermediate.
• Strong analytical skills and ability to make data-driven decisions.

What you will do:

• Launching and optimizing Google Ads campaigns and scaling them to achieve KPIs.
• Searching for growth points and optimizing advertising campaigns, including working with semantics and creating ads.
• Creating analytical reports on the performance of the advertising platform and product.
• Development and implementation of a product promotion strategy on the Google platform.
• Analysis of user behavior patterns from different traffic channels and interaction with the product.
• Generating and testing hypotheses, finding new approaches to traffic optimization.
• Launching and managing mobile app advertising campaigns to drive installs, engagement, and growth.

What we offer:

• Services of a corporate doctor, and after the probationary period — health insurance in Ukraine.
• 20 working days of paid vacation per year, unlimited sick leave.
• All equipment necessary for work.
• Access to top-tier courses, corporate online meetups, lectures, a comprehensive library, and 11 professional internal communities for career development.
• Comfortable offices in Kyiv’s Podil district with secure shelters. In the offices, you don’t have to worry about the routine: breakfasts, lunches, lots of snacks and fruits, lounges, massages and other benefits of office life are waiting for you 🙂

Join us!

[HIRING] 3D Artist (Hard Surface modeling)

Location: Remote

Type: Project-based (3+ month of full-time workload, with a potential for long-term contract after that period).
 

About Us

HiMASTERS is a 3D outsourcing studio led by senior artists with decades of experience on top-tier projects and franchises including Metro Exodus, Halo, Battlefield, Microsoft Flight Simulator, War Thunder, World of Tanks, and many more. We deliver top-quality assets for both games and cinematics — stylized or realistic, always production-ready.
 

ABOUT THE JOB

HiMASTERS — is looking for Hard-surface artists to create assets for Flying simulators, Train simulators, Third-person mech shooters (PC, mobile), weapons for FPS, TPS games.
 

RESPONSIBILITIES

• Create 3d models and textures of planes, vehicles and machinery with high-level of similarity. Ideally using camera/photo matching techniques. Simulator projects require a high-level of similarity. Ideally there should not be a difference between a photo and a model.
• Create hard-surface models using different techniques and pipelines (high-to-low, mid-poly, low-to-high poly)
• Retopologize and transform 3d scans and CAD models to game ready models.
• Ensure consistency and quality of your work and be able to match the project requirements.
• Receive feedback and modify work based on art direction.
• Report work progress. We require 1 screenshot and 1 sentence report regarding the work progress at the end of the day. We use it to keep our clients up to date.
   

REQUIREMENTS

• The main requirement is responsibility.
• Knowledge of modern modeling pipelines
• Functional knowledge of articulation and mechanical aptitude
• Experience with creating PBR materials
• Proficiency in 3ds max, blender, Zbrush, Substance painter, Fusion 3d, MOI, Plasticity
• Intermediate English. All the documentations and communications with the clients and your Lead would be held in English.
• Good communication and interpersonal skills and willingness to help everyone
• Ability to create a basic machinery rigging and animations
• Minimum experience with game engine integration (Unity, Unreal)
   

WILL BE A BIG PLUS

• Desire to develop as a specialist further
• Ability to check the quality of the models and provide feedback.
• Ability to estimate models and projects.
• Good English written and speaking
• Camera matching experience: Image modeler, 3ds max camera matching, Blender fSpy and Perspective Plotter.
• CAD experience.
• Ability to set up the asset for game engine exporting in blender and 3ds max. We do not care where the model was created. But most of the custom engines we work use 3ds max or blender addons for exporting.
• Experience with LODs, collisions, damage model creation, emitters etc.
   

How to Apply

Send your CV and Portfolio

What will need to be done:

- Control of the development process and deadlines.

- Managing the development team and ensuring effective work.

- Identifying and solving problems that arise in the process of performing tasks.

- Conducting daily stand-ups, demo and retro sprints, generating ideas to improve the team’s interaction with each other.

- Project resource management and team workload responsibility.

- Control and management of design and technical documentation.

What we expect from you:

- Experience in managing IT projects in the position of Project Manager from 2 years.

- Experience in project management using the Agile/Scrum methodology (implementation of Agile management methodologies from scratch).

- Experience in creating design and technical documentation.

- Knowledge of team performance analytics tools.

- Communication skills — the ability to facilitate meetings.

- Risk management.

- English at B1 level.

It will be a plus:

- Technical background: understanding the stages and processes of web development projects

- Understanding the business logic of e-commerce projects

Who we are:
Selesa offers IT outsourcing, specialist out-staffing, and project management services to enhance business operations. We focus on providing skilled professionals for IT needs, including development, security consulting, and business development. Selesa also manages sales, account management, and human resources to support company growth. Our services are known for efficiency, quality, and strong communication, making us a trusted partner for businesses looking to streamline and secure their IT infrastructure. Originated in Vilnius, Lithuania, we cater to global clients.

Who we are looking for:

We’re looking for a Technical Support Specialist who is highly adept in systems analysis, diagnostics, troubleshooting, and conflict resolution. Exhibits excellent organizational and problem-solving skills.

Responsibilities

• Manual test of web games, which are coming to release.
• Bug report to game providers.
• Work process with currencies: accept the requests from clients, where the client asks the QA team to enable the currency for determining game category.
• Enable clients to our platform. 
• Create client-game provider integrations.
• Resolve interrupted payments/transactions in games.
• Resolve the issues with the launch of the game.
• Provide the information about games to the client. 

Requirements:

• Degree in Computer Science, Engineering, or a related subject
• Work experience in software technical support would be an asset 
• General understanding of client-server architecture
• Knowledge of software methodologies, tools, and processes
• Experience with performance and/or security testing is a plus
• Strong attention to detail and teamwork skills.
• Ability to meet deadlines in a fast-paced environment.

What we offer:

• Fully remote position with a flexible schedule
• Long-term opportunity with potential for financial and career advancement

• Supportive and positive work culture, collaborating with like-minded teammate

   

The recruitment process will include a three-day pre-trial period, during which we will test your skills. This period is paid. After successfully completing the pre-trial, an interview will follow. If the interview is successful, the next step will be an offer.

When submitting your application, please make sure to include your responses to the following screening questions in your COVER LETTER:

1. Please explain to us your level of spoken/written English. Just rank it from 1 to 10, where 10 means a Native Speaker; 8-9 means a Near Native Speaker; 6-7 means Fluent Speaker; under 6 any further levels.
2. Can you share examples from your portfolio that showcase your Technical Support experience?
3. What are your Monthly salary expectations for a long-term, full-time position (if we consider 40 hours a week)?

We’re now expanding into the Mental Health space with a new venture. Our mission is to help people find peace in chaos, build resilience, and live fulfilling, balanced lives. We’re looking for a User Acquisition Manager to join our creative marketing team.

What you’ll do:
— Manage ad campaigns (launch, optimization, scaling)
— Test hypotheses and explore new approaches
— Analyze campaigns and key performance metrics
— Contribute to shaping the marketing strategy
— Research competitors and implement insights
— Collaborate with the creative and marketing teams

About you:
— 1+ years in User Acquisition / Performance Marketing
— Strong knowledge of Meta Ads; bonus: TikTok
— Data-driven mindset: skilled with CPA, LTV, ROAS, funnel analytics
— Hands-on with A/B testing, scaling, and creative optimization
— Creative & proactive, able to generate and validate new hypotheses
— Strong cross-team collaboration with product and creative teams
— English: Upper-Intermediate (B2)+

Why this is a great opportunity to join our Mental Health startup:
— Work on a meaningful product that helps people improve their mental well-being
— Direct impact on millions of users across global markets
— Join a high-performing creative team that values testing, innovation, and speed
— No legacy systems, no bureaucracy — just fast decisions and space to grow

The role is based in the Kyiv region, and we will expect you to work full-time in the office. We have a shuttle service from the nearest metro station.

About the Job

We are seeking a talented System Engineer Navigation to join our team and drive the next generation of UAV navigation systems. In this role, you will work at the intersection of hardware and software, contributing to the integration of advanced sensors, the development of navigation algorithms, and the continuous improvement of flight control performance. If you are passionate about UAV technology, thrive in cross-functional collaboration, and are eager to push the boundaries of navigation and guidance systems, we’d love to meet you.

What is your Day to Day Mission:

• Coordinate between customer support and R&D, focus on feature requests and facilitating bug reporting
• Collect, analyze, and evaluate preliminary data for hardware updates
• Collaborating with cross-functional teams
• Contribute to design reviews and system documentation
• Analysis and integration of new Sensors with a focus on flight control-related sensors such as IMU, GNSS, Magnetometers and pressure sensors
• Devise integration and sanity checking concepts
• Develop, implement and test algorithms for navigation and control systems in line with project requirements
• Simulation and analysis to verify GNC models and system performance under different operating conditions

• Improve performance through novel sensor calibration approaches

   

What you bring to the team:

• BS in Robotics, Computer Science, Electrical, Mechanical, Mechatronics, Aerospace engineering or related
• Hands-on experience with low level protocols, including UART, Ethernet and I2C
• Ability to quickly understand and navigate complex systems and established code bases
• Fluent in written and spoken English

• Proficient in programming with a strong ability to adapt and learn new languages and technologies

   

As a plus:

• Practical experience developing GNC designs for flight systems
• Experience in writing code in C/C++ or Rust

• Experience with Matlab and Simulink

   

Why Quantum-Systems:

• We Stand with Ukraine!
• We believe in the power of combined efforts: straightforward tech expertise paired with a customer-centric focus.
• We are industry pioneers who are ambitious, bold, and visionary.
• We push limits, think outside the box, and strive for technological excellence to shape the future of aerial data.
• We promise to be your runway for individual and professional growth.

The role is based in the Kyiv region, and we will expect you to work full-time in the office. We have a shuttle service from the nearest metro station.

About the Job

As Linux Software Engineer, you will be a key part of our System Architecture team to develop and maintain the Linux-based systems powering our unmanned aerial vehicles at Quantum-Systems. Together with our World-Class-Team, currently 3 team members, you will take an empowering role: pushing the boundaries of drone technologies.

You will be working closely with stakeholders from the Avionics, Systems Engineering, and Flight Testing departments to integrate hardware, third-party software, and onboard applications into a high-performance Linux platform.

Providing a reliable, scalable, and mission-critical software environment is essential to Quantum-Systems — your mission will have a powerful impact.

What is your Day to Day Mission:

• Maintaining existing as well as creating new Linux applications on the unmanned aircraft
• Designing and coordinating interfaces between teams, documenting the architecture and design decisions
• Integration of hardware and 3rd-party software into the Linux system, aligning with suppliers and other teams
• Testing of existing and new applications. This includes writing unit tests, integration tests, functional tests, and acceptance tests
• Analyzing logs from flights, both from test flights as well as real-world customer issues
• Debugging and finding solutions for software and hardware issues related to the Linux system
• Maintaining and extending the build system, pipeline, and tooling. Creating releases with release notes

• Working in an agile environment and following the defined development process

   

What you bring to the team:

• Bachelor’s or Master’s degree in Computer Science, Electrical Engineering, or a related technical field
• 3+ years of experience in Linux software development, preferably in embedded or robotics systems
• Strong proficiency in C/C++ (14 or newer) with proven experience developing Linux applications
• Solid understanding of Linux internals, including system services, device trees, and kernel modules
• Experience with cross-compilation, Yocto, Buildroot, or similar build systems
• Hands-on experience with debugging tools (e.g., GDB, strace, perf) and log analysis
• Familiarity with testing methodologies, including writing and executing unit, integration, and system-level tests
• Experience with CI/CD pipelines, version control systems (e.g., Git), and release management
• Strong problem-solving skills, with the ability to debug both software and hardware integration issues
• Proficiency in technical documentation, including interface definitions and architectural decisions
• Excellent communication and teamwork skills to work effectively across multiple engineering disciplines

• English Intermediate+

   

Nice to Have:

• Experience in aerospace, UAV, or automotive industries
• Familiarity with middleware and interface standards such as DDS, MAVLink, CAN, or Ethernet
• Knowledge of containerization technologies (e.g., Docker) and virtualization
• Prior experience working in an Agile/Scrum development environment
• Exposure to real-time Linux or safety-critical software development is a plus

Why Quantum-Systems:

• We Stand with Ukraine
• We believe in the power of combined efforts: straightforward tech expertise paired with a customer-centric focus.
• We are industry pioneers who are ambitious, bold, and visionary.
• We push limits, think outside the box, and strive for technological excellence to shape the future of aerial data.
• We promise to be your runway for individual and professional growth.

Position Overview:

ELVTR is a premier online education platform offering live courses taught by top executives from globally renowned companies. We are dedicated to transforming the online education industry by providing elite-level education and innovative course offerings.

We’re looking for a dedicated and tech-savvy Tech Admin to join our team. This role is perfect for someone with a solid technical background who is eager to help streamline our systems, manage technical tools, and support our internal teams with their technology needs. 

This is a full-time remote position.

This job is for you if you are:

• Are a self-motivated individual with a passion for problem-solving in technical areas and enjoy taking on new challenges.
• Thrive in fast-paced environments, able to juggle multiple tasks and prioritize requests efficiently.
• Can independently troubleshoot technical issues and find proactive solutions to minimize disruptions.
• Are a team player who enjoys collaborating across departments to improve systems and workflows.
• Have a continuous improvement mindset, always seeking ways to automate processes and increase team efficiency.

Responsibilities:

• Handle technical requests in chats: troubleshoot issues, set up equipment, and investigate automation or tool-related problems (HubSpot, Aircall, Front, Stripe, etc.).​
• Manage onboarding/offboarding: set up and deactivate user accounts, ensure proper tool access.
• ​Administer key tools: maintain and configure HubSpot, Twilio, Aircall, Front, Stripe, etc and related integrations.​
• HubSpot support: set up automations, workflows, and reports, etc.
• ​Automate processes: build and maintain automations via Zapier, n8n, native tools, or Google Apps Script
   

Requirements:

• 2+ years of experience in a technical support, systems administration, or similar role.
• Proficiency in English at a B2 level or higher.
• Strong learning agility and the ability to quickly pick up new tools and technologies.
• Excellent communication skills, both written and verbal, to explain complex technical concepts to non-technical teams.

• Attention to detail and strong documentation skills.

   

Nice to Have:

• Experience with CRM administration and automation tools.
• Experience with any of the following tools: Twilio, Aircall, Front, Stripe, or Google Apps Script.
  
  
   

What We Offer:

• Competitive Salary and Bonuses: We value your contributions and offer competitive compensation and performance-based incentives.
• Comprehensive Benefits: Enjoy gym membership reimbursements, mental health benefits, generous vacation allowances, and complimentary access to all our courses.
• Flexible Work Environment: Work remotely with a schedule that accommodates your personal and professional needs.

• Growth Opportunities: Join a company committed to your professional development, offering abundant opportunities for career advancement.

   

Why You Should Join ELVTR:

• Innovative Culture: Be part of a team that values creativity, collaboration, and intellectual curiosity.
• Impactful Work: Contribute to a mission that is reshaping the future of online education.

• Professional Development: Take advantage of learning opportunities and growth prospects within a forward-thinking company.

   

Join Us: If you are a detail-oriented professional ready to contribute to a leading online education platform, we encourage you to apply. Elevate your career with ELVTR.

ELVTR is committed to providing equal opportunities and fostering a diverse, inclusive environment for all, whether you join us as an employee or a contractor.

UVIK Software is a fast-growing software development company with a global presence and a reputation for delivering high-quality solutions. We work with startups and enterprise-level businesses worldwide, helping them build scalable products, modernize technology, and accelerate growth.

Our success comes from a strong, ambitious, and supportive team — and now we’re looking for a 💡proactive Lead Generation Manager 💡 who’s ready to take on the challenge of driving new business opportunities in the global IT market.

💬 What You’ll Do

• Design and execute effective lead generation strategies for IT products and services
• Use automation tools (LinkedIn Sales Navigator, Apollo, Hunter, etc.) to find, verify, and qualify leads
• Research and analyze markets to identify and target the right audiences
• Build and manage a structured database of potential clients
• Collaborate with sales and marketing teams to turn leads into long-term partnerships
• Track KPIs, measure campaign performance, and constantly optimize results

✅ What We’re Looking For

• 3+ years of proven experience in IT lead generation
• Mandatory background in outstaff and outsourcing companies
• Proficiency with lead generation automation tools (LinkedIn Sales Navigator, Apollo, Hunter, etc.)
• Hands-on experience with CRM systems (Salesforce, HubSpot) and analytics tools (Google Analytics, Power BI, etc.)
• Strong analytical mindset and data-driven approach
• Excellent communication skills to collaborate with internal teams and clients
• English level: B2+ (both written & spoken)

Nice to Have

• Knowledge of A/B testing and conversion optimization
• Experience with automated marketing platforms (Mailchimp, Marketo, etc.)
• Understanding of modern digital marketing strategies and growth hacking

Why You’ll Love Working With Us

• ⏰ Flexibility first – plan your schedule freely, no micromanagement, just trust ✅.
• 📚 Growth you can feel – we cover courses, certifications, and training to boost your career 📈.
• ✨ Recharge properly – 18 paid vacation days  + 12 paid sick leaves  per year.
• 💻 Top gear for top talent – MacBook Pro 💻  provided from day one.
• 💵 Performance that pays – competitive base salary  + performance-based bonuses 🎯.
• 🤝 No corporate nonsense – join a friendly, ambitious, and supportive team 🙌.
• 🌍 Work with impact – contribute to international projects and create solutions that matter worldwide 🌟.

📩 Ready to grow with us?
Apply now and bring your expertise to a company that values innovation, ownership, and people. Let’s shape the future together! 🚀

Headway Inc is a global tech company, revolutionizing lifelong learning by creating digital products for over 150 million users worldwide. Our mission is to help people grow. We’re proud to be ranked 4th among the World’s Top EdTech Сompanies by TIME magazine. We believe lifelong learning should be accessible, personalized, and impactful to each individual. That’s how we change the world and why we bring together exceptional minds.
 

The core of our achievements is our team. We believe in people and shared values SELECT. That’s why, together with Lisa Rudyk, User Acquisition Manager at Headway by Headway Inc, we’re looking for a PPC Specialist to take full ownership of Google Ads acquisition — one of our top strategic priorities.
 

The product and team you will be working with:

Headway is our flagship app, offering summaries of nonfiction bestsellers, daily insights, and gamified challenges. Headway is the world’s most downloaded book summary app and has been featured as App of the Day in over 30 countries, including the US, the UK, and Canada.
 

You’ll join our User Acquisition team, responsible for driving new user growth, fueling product expansion, and supporting the company’s financial goals. We focus on scaling new revenue by testing fresh approaches and continuously exploring the most effective ways to accelerate product growth.
 

This job is perfect for you if you:

• Want to work on a product that’s a market leader in Book Summaries across the US and Tier-1 countries.
• Are excited to see the direct impact of your work reflected in both financial and product metrics at Headway.
• Thrive when you have full ownership — Google Ads acquisition is one of our top strategic priorities, and you’ll drive it end to end.
• Want to collaborate closely with the Product team while sharpening your product marketing expertise.
• Love working with a performance-driven team of people who are fully committed to results.
• Are eager to grow in a data-driven environment where experiments and analytics guide every decision.
• Value strong partnerships — we work closely with Google, Meta, and TikTok. Our collaboration with Google’s Ukrainian office gives you access to offline interactions, summits, resources, and exclusive events.
   

What you will do:

• Scale Headway App’s user acquisition through Google Ads campaigns.
• Collaborate with the Product team to design new funnels and run product experiments.
• Analyze data, metrics, and test outcomes to make decisions grounded in data-driven insights.
• Improve funnel conversions (CRO) in partnership with the Product team.
• Test creatives, audiences, and bidding strategies to maximize growth.
• Work closely with Creative Marketing, Product Marketing, and Analytics teams to drive new user growth.
• Build and maintain automations and scripts to streamline campaign management and optimization.
   

What you need to join us:

• Proven experience with Google Ads (PMax, Search, Demand Gen, Display).
• Strong knowledge of analytical tools such as Google Analytics, Tableau, Mixpanel, Amplitude, etc.
• Solid understanding of marketing metrics
• Ability to analyze data and uncover causal relationships.
• Hands-on experience with scripts and campaign automation.
• Experience working on CRO initiatives with product teams is a strong plus.
• Alignment with the values of our team (SELECT).
   

What do we offer:

• Work within an ambitious team on a socially impactful education product.
• An office with a reliable shelter, generators, satellite internet, and other amenities.
• Access to our corporate knowledge base and professional communities.
• Personal development plan.
• Compensation for English language learning, external training, and courses.
• Medical insurance and full sick leave compensation.
• Company doctor and massage in the office.
• Sports activities: running, yoga, boxing, and more.
• Corporate holidays: we go n a week-paid holiday to rest and recharge twice a year.
• Supporting initiatives that help Ukraine. 
   

Working schedule

This is a full-time position with a hybrid remote option. It means that you can decide for yourself: whether you want to work from the office, remotely, or combine these options.
 

Are you interested?

Send your CV!

Lalafo is a fast-growing C2C marketplace with over 3.5 million active users. We provide an online platform that enables people to buy and sell goods, order services, find jobs, and connect with specialists. Since 2015, we’ve been operating in markets such as Kyrgyzstan, Azerbaijan, Serbia, and Poland.

We’re currently looking for a Junior PHP Developer based in Kyiv or Cherkasy 🇺🇦

Office presence is required — this is not a remote role.

Our tech team is building fast, scalable, and user-oriented solutions that support millions of users. If you’re passionate about backend development, eager to grow your skills, and excited to contribute to a live product — we’d love to have you join us!

Technologies used in the project:
Kubernetes, GitLab CI, Ansible, PostgreSQL, Redis, RabbitMQ, Elasticsearch, PHP, Python, Node.js, ClickHouse, Kafka, Graylog, InfluxDB, MongoDB, PHP 8.3, Symfony ^6.4, Yii2.

Responsibilities:

• Develop and maintain PHP applications under the guidance of senior developers
• Implement REST API endpoints and third-party integrations
• Work with SQL/NoSQL databases and optimize queries
• Learn and apply message queue concepts (e.g. RabbitMQ)
• Write clean, well-documented, OOP-compliant code
• Participate in code reviews and knowledge-sharing sessions
• Collaborate with team members and QA engineers
• Contribute to testing and debugging processes
   

Requirements:

• PHP 8.0+ — basic to intermediate level
• Experience with pet or commercial projects
• Solid understanding of OOP principles and basic design patterns
• Understanding of REST API architecture and tools like Postman
• Knowledge of SQL databases (e.g. PostgreSQL, MySQL)
• Basic understanding of message queues and async processing
• Git (basic usage: commits, branches, pull requests)
   

Soft Skills:

• Eagerness to learn and grow with support
• Attention to detail and clean code
• Proactive attitude and willingness to ask questions
• Good communication and collaboration skills
• Self-organization and time management
   

We offer:

• ✨ Real-world product experience with millions of users
• 👨‍🏫 Mentorship from mid- and senior-level developers
• 🚀 A growth-oriented environment with exciting, challenging tasks
• 🧠 Code reviews and regular internal knowledge-sharing sessions
• 🤝 A friendly team and open, honest communication
• 🏢 Office-based teamwork in Kyiv or Cherkasy

Required:

• 🇬🇧 English: A2+ and above (for internal documentation and communication)
• 🇺🇦 Location: Kyiv or Cherkasy — office attendance required
   

Hiring Process:

HR interview, Test task,  Technical interview

Help us push AI further — and faster

LoopMe’s Data Science team builds production AI that powers real-time decisions for campaigns seen by hundreds of millions of people every day. We process billions of data points daily — and we don’t just re-apply old tricks. We design and deploy genuinely novel machine learning systems, from idea to prototype to production.

You’ll join a high-trust team that has a 5-star Glassdoor rating led by Leonard Newnham, where your work moves fast, ships to production, and makes measurable impact.

What you’ll do:

• Design, build, and run large-scale ML pipelines that process terabytes of data
• Apply a mix of supervised learning, custom algorithms, and statistical modelling to real-world problems
• Ship production-grade Python code that’s clear, documented, and tested
• Work in small, agile squads (3–4 people) with DS, ML, and engineering peers
• Partner with product and engineering to take models from idea → production → impact
• Work with Google Cloud, Docker, Kafka, Spark, Airflow, ElasticSearch, ClickHouse and more

What you bring:

• Bachelor’s degree in Computer Science, Maths, Engineering, Physics or similar (MSc/PhD a plus)
• 4+ years’ commercial Python experience
• Track record building ML pipelines that handle large-scale data
• Excellent communication skills — comfortable working across time zones
• A curious, scientific mindset — you ask “why?” and prove the answer

Bonus if you have:

• Experience with adtech or real-time bidding
• Agile / Scrum experience
• Knowledge of high-availability infrastructure (ElasticSearch, Kafka, ClickHouse)
• Airflow expertise

About the Data Science Team:

We’re 17 ML engineers, data scientists, and data engineers, distributed across London, Poland, and Ukraine — acting as one team, not a satellite office.

What sets us apart:

• Led by an experienced Chief Data Scientist who codes, leads, and listens
• Inclusive, supportive culture where ideas are heard and people stay
• Strong values: open communication, continual innovation, fair treatment, and high standards
• Track record of publishing award-winning research in automated bidding

Don’t just take our word for it — check our Glassdoor reviews (search “Data Scientist”) for a real view of the culture.

About LoopMe:

LoopMe was founded to close the loop on brand advertising. Our platform combines AI, mobile data, and attribution to deliver measurable brand outcomes — from purchase intent to foot traffic. Founded in 2012, we now have offices in New York, London, Chicago, LA, Dnipro, Singapore, Beijing, Dubai and more.

What we offer:

• Competitive salary + bonus
• Billions of real-world data points to work with daily
• Flexible remote/hybrid options
• Learning budget and career growth support
• Friendly, transparent culture with strong leadership

Hiring process:

1. Intro with Talent Partner
2. 30-min technical interview with Chief Data Scientist
3. Panel with 2 team members (technical, culture & collaboration)
4. Offer – usually within 48 hours of final round

Are you ready to design and deploy AI systems that run at truly massive scale?

We are hiring an MLOps Engineer specializing in Large Language Model (LLM) infrastructure to design and maintain the robust platform on which our AI models are developed, deployed, and monitored. As an MLOps Engineer, you will build the backbone of our machine learning operations — from scalable training pipelines to reliable deployment systems — ensuring that our NLP models (including LLMs) can be trained on large datasets and served to end-users efficiently. This role sits at the intersection of software engineering, DevOps, and machine learning, and is crucial for accelerating our R&D in the Ukrainian LLM project. You’ll work closely with data scientists and software engineers to implement best-in-class infrastructure and workflows for the continuous delivery of AI innovations.

What you will do

• Design and implement modern, scalable ML infrastructure (cloud-native or on-premises) to support both experimentation and production deployment of NLP/LLM models. This includes setting up systems for distributed model training (leveraging GPUs or TPUs across multiple nodes) and high-throughput model serving (APIs, microservices).
• Develop end-to-end pipelines for model training, validation, and deployment. Automate the ML workflow from data ingestion and feature processing to model training and evaluation, using technologies like Docker and CI/CD pipelines to ensure reproducibility and reliability.
• Collaborate with Data Scientists and ML Engineers to design MLOps solutions that meet model performance and latency requirements. Architect deployment patterns (batch, real-time, streaming inference) are appropriate for various use-cases (e.g., a real-time chatbot vs. offline analysis).
• Implement and uphold best practices in MLOps, including automated testing of ML code, continuous integration/continuous deployment for model updates, and rigorous version control for code, data, and model artifacts. Ensure every model and dataset is properly versioned and reproducible.
• Set up monitoring and alerting for deployed models and data pipelines. Use tools to track model performance (latency, throughput) and accuracy drift in production. Implement logging and observability frameworks to quickly detect anomalies or degradations in model outputs.
• Manage and optimize our Kubernetes-based deployment environments. Containerize ML services and use orchestration (Kubernetes, Docker Swarm or similar) to scale model serving infrastructure. Handle cluster provisioning, health, and upgrades, possibly using Helm charts for managing LLM services.
• Maintain infrastructure-as-code (e.g., Terraform, Ansible) for provisioning cloud resources and ML infrastructure, enabling reproducible and auditable changes to the environment. Ensure our infrastructure is scalable, cost-effective, and secure.
• Perform code reviews and guide other engineers (both MLOps and ML developers) on building efficient and maintainable pipelines. Troubleshoot issues across the ML lifecycle, from data processing bottlenecks to model deployment failures, and continuously improve system robustness.

Qualifications and experience needed

Experience & Background:

• 4+ years of experience in DevOps, MLOps, or ML Infrastructure roles
• Strong foundation in software engineering and DevOps principles as they apply to machine learning
• A bachelor’s or Master’s in Computer Science, Engineering, or a related field is preferred

Cloud & Infrastructure:

• Extensive experience with cloud platforms (AWS, GCP, or Azure) and designing cloud-native applications for ML
• Comfortable using cloud services for compute (EC2, GCP Compute, Azure VMs), storage (S3, Cloud Storage), container registry, and serverless components where appropriate
• Experience managing infrastructure with Infrastructure-as-Code tools like Terraform or CloudFormation

Containerization & Orchestration:

• Proficiency in container technologies (Docker) and orchestration with Kubernetes
• Ability to deploy, scale, and manage complex applications on Kubernetes clusters; experience with tools like Helm for Kubernetes package management
• Knowledge of container security and networking basics in distributed systems

CI/CD & Automation:

• Strong experience implementing CI/CD pipelines for ML projects
• Familiar with tools like Jenkins, GitLab CI, or GitHub Actions for automating testing and deployment of ML code and models
• Experience with specialized ML CI/CD (e.g., TensorFlow Extended TFX, MLflow for model deployment) and GitOps workflows (Argo CD) is a plus

Programming & Scripting:

• Strong coding skills in Python, with experience in writing pipelines or automation scripts related to ML tasks
• Familiarity with shell scripting and one or more general-purpose languages (Go, Java, or C++) for infrastructure tooling
• Ability to debug and optimize code for performance (both in data pipelines and in model inference code)

ML Pipeline Knowledge:

• Solid understanding of the machine learning lifecycle and tools
• Experience building or maintaining ML pipelines, possibly using frameworks like Kubeflow, Airflow, or custom solutions
• Knowledge of model serving frameworks (TensorFlow Serving, TorchServe, NVIDIA Triton, or custom Flask/FastAPI servers for ML)

Monitoring & Reliability:

• Experience setting up monitoring for applications and models (using Prometheus, Grafana, CloudWatch, or similar) and implementing alerting for anomalies
• Understanding of model performance metrics and how to track them in production (e.g., accuracy on a validation stream, response latency)
• Familiarity with concepts of A/B testing or canary deployments for model updates in production

Security & Compliance:

• Basic understanding of security best practices in ML deployments, including data encryption, access control, and dealing with sensitive data in compliance with regulations
• Experience implementing authentication/authorization for model endpoints and ensuring infrastructure complies with organizational security policies

Team Collaboration:

• Excellent collaboration skills to work with cross-functional teams
• Experience interacting with data scientists to translate model requirements into scalable infrastructure
• Strong documentation habits for outlining system designs, runbooks for operations, and lessons learned

A plus would be

LLM/AI Domain Experience:

• Previous experience deploying or fine-tuning large language models or other large-scale deep learning models in production
• Knowledge of specialized optimizations for LLMs (such as model parallelism, quantization techniques like 8-bit or 4-bit quantization, and use of libraries like DeepSpeed or Hugging Face Accelerate for efficient training) will be highly regarded

Distributed Computing:

• Experience with distributed computing frameworks such as Ray for scaling up model training across multiple nodes
• Familiarity with big data processing (Spark, Hadoop) and streaming data (Kafka, Flink) to support feeding data into ML systems in real time

Data Engineering Tools:

• Some experience with data pipeline and ETL
• Knowledge of tools like Apache Airflow, Kafka, or dbt, and how they integrate into ML pipelines
• Understanding of data warehousing concepts (Snowflake, BigQuery) and how processed data is used for model training

Versioning & Experiment Tracking:

• Experience with ML experiment tracking and model registry tools (e.g., MLflow, Weights & Biases, DVC)
• Ensuring that every model version and experiment is logged and reproducible for auditing and improvement cycles

Vector Databases & Retrieval:

• Familiarity with vector databases (Pinecone, Weaviate, FAISS) and retrieval systems used in conjunction with LLMs for augmented generation is a plus

High-Performance Computing:

• Exposure to HPC environments or on-prem GPU clusters for training large models
• Understanding of how to maximize GPU utilization, manage job scheduling (with tools like Slurm or Kubernetes operators for ML), and profile model performance to remove bottlenecks

Continuous Learning:

• Up-to-date with the latest developments in MLOps and LLMOps (Large Model Ops)
• Active interest in new tools or frameworks in the MLOps ecosystem (e.g., model optimization libraries, new orchestration tools) and a drive to evaluate and introduce them to improve our processes

What we offer

• Office or remote — it’s up to you. You can work from anywhere, and we will arrange your workplace
• Remote onboarding
• Performance bonuses
• We train employees with the opportunity to learn through the company’s library, internal resources, and programs from partners
• Health and life insurance
• Wellbeing program and corporate psychologist
• Reimbursement of expenses for Kyivstar mobile communication