Jobs at Djinni

Warmy.io is an AI-powered platform that helps businesses land in inboxes, not spam folders. We are a fast-growing global startup, trusted by companies worldwide to improve email deliverability and outreach performance.

As we grow, we’re looking for a CRO & PPC Manager - someone proactive, and curious - to support our marketing team across a variety of tasks. 

What You'll Do

• Assist with content creation and simple designs in Canva
• Support copywriting, idea generation, and creative brainstorming with tools like ChatGPT
• Help update and manage content in WordPress (no coding required)
• Assist with Google Ads setup and ad creation (under guidance)
• Participate in creating Meta/TikTok ads – both visual and video (together with a video editor)
• Support the execution of CRO experiments and A/B tests
• Take ownership of marketing-related tasks
• Communicate clearly and professionally with the team
• Suggest improvements and stay organized across multiple tasks
   

What We’re Looking For

• A humble, proactive attitude with a strong desire to learn
• Ability to think critically, solve problems, and work independently
• A good sense of design and content structure
• Strong organizational skills and task management
• Fluent or advanced English (written + verbal)
• Ability to work in a remote team and ask for help when needed
   

Nice to Have (but not required)

• Experience with B2B
• Simple video editing workflows
   

What We Offer

• Remote, full-time B2B contract
• Monthly compensation in USD via bank transfer (SWIFT)
• 12 PTO days, 10 sick days, and recognition of public holidays
• A friendly, supportive, and fast-growing environment
• Full access to tools, training, and mentorship from your manager
• The opportunity to grow into a full-fledged digital marketing specialist
   

If you're excited about digital marketing, love to learn, and want to grow inside a global SaaS startup - apply now and join the Warmy.io journey!

We are looking for a motivated HR/Recruiter Assistant to support our HR department in sourcing, quality control, and process management. This role requires strong English skills (B2 or higher) and attention to detail in working with recruitment processes.

Responsibilities:

• Sourcing candidates and supporting the execution of HR tasks
• Reviewing and evaluating interview recordings, providing structured feedback
• Conducting interviews in English (if required)
• Coordinating with department heads to align hiring needs
• Tracking and assigning HR-related tasks, ensuring deadlines are met
• Working with ATS/CRM systems (Zoho Recruit/Zoho People); experience with similar systems is a plus
   

Requirements:

• English level B2 or higher (spoken and written)
• Previous experience in HR/recruitment support or related field is an advantage
• Strong organizational and communication skills
• Ability to work independently in a fully remote environment
• Attention to detail and ability to manage multiple tasks simultaneously

What we offer:

• Fully remote work format
• Work schedule: Monday to Friday, 9:00 – 18:00 (flexible hours possible)
• Corporate English and German courses
• Corporate psychologist (free of charge)
• Opportunities for career growth within the company

About the Project

Join a high-performing UK-based product and cross-functional product team composed of top-tier engineers(PhD holders). We’re building an enterprise-grade data platform designed to integrate, process, and analyze vast amounts of disparate data in real-time.

This platform leverages cutting-edge technologies: Big Data, cloud-native architecture, AI-driven insights, and advanced database tooling to deliver deep operational visibility and power faster, smarter business decisions. We ensure scalability, traceability, and compliance (GDPR, HIPAA) through robust data lineage and governance features.

You’ll work mainly on AI services, having tight collaboration with backend developers to ensure seamless API integration. 

What You’ll Do

• Design and develop advanced AI components using LangChain, AutoGen, and other multi-agent orchestration frameworks
• Build and optimize RAG (Retrieval-Augmented Generation) pipelines using tools like Google AI Platform, Vertex AI and Pinecone.
• Engineer efficient prompts and fine-tune LLMs (e.g., GPT-4o, DeepSeek) for advanced data analytics capabilities
• Develop AI-related backend services using Python and FastAPI
• Deploy scalable solutions in Google Cloud Platform (GCP), working with services such as BigQuery, GKE, Cloud Storage, etc.

• Collaborate with backend and data engineering teams to integrate and expose AI functionality via well-structured APIs

   

Must-Have Skills

• 5+ years of experience in backend and AI system development
• Strong hands-on experience with LangChain, AutoGen, and multi-agent frameworks
• In-depth knowledge of LLMs, prompt engineering, NL2SQL, and RAG architectures
• Proficient in Python and FastAPI
• Proven experience with GCP services: Vertex AI, BigQuery, GKE, Cloud Storage
• Experience building production-grade RAG pipelines

• Excellent problem-solving and communication skills

   

Nice-to-Have

• Experience working with data engineering and DevOps tools
• Familiarity with data governance frameworks and compliance standards (GDPR, HIPAA)

• Exposure to real-time processing and scalable architecture patterns

   

Why Join Us

• Work with a world-class team on a cutting-edge AI and data platform
• High-impact role with room for innovation and growth
• Flexible schedule and remote-friendly setup
• Competitive compensation
• Collaborative, growth-oriented culture
• Engage in technically challenging, meaningful projects

Who are we looking for?

We are looking for an "independent fighting unit" who is ready to join our Team and start working together on our projects immediately or after training.

Tasks?

Your tasks will focus on the skills and expectations listed below and the use of new approaches and technologies.

Why did the job open?

We want to invite a new specialist to the company's staff due to the increase in the number of projects and the opening of a branch.

Requirements:

- B1 English (Upper-Intermediate)+

- At least 2+ year of commercial experience with JavaScript

- At least 2+ years of commercial experience with Node.js

- Experience with Typescript, Nest.js

- Experience with RDBMS and NoSQL databases

- Experience with implementing automated testing platforms and unit tests

- Experience with REST/GraphQL

- Experience with cloud services such as AWS, GCP or Azure

- Experience with CI/CD processes

- Experience in integrating with external APIs

- SOLID understanding of object-oriented programming

- Flexibility and ability to adapt to changes

- Ability to work closely with Product Managers and Engineering Team-members

Good to have:

- Experience with Unit/E2E testing

- Understanding design, and architecture principles

- Experience with message brokers, like RabbitMQ, SQS, etc

- Experience with JS web-frameworks React/Vue/Angular etc

United Tech is a global IT product company shaping the future of real-time social connection.

With millions of users across North America, Europe, LATAM, and MENA, we build next-gen mobile and web apps for live-streaming and social networking.

Our platforms enable connection at scale fast, interactive, and deeply engaging.

The market is projected to exceed $206B by 2030, and we are already leading the evolution.

Founded in Ukraine, scaling worldwide. Are you in?

About the role: This is a role for a leader who thrives in a fast-moving product environment, where challenges fuel growth and every decision shapes the future. With United Tech you will have the freedom to design, build, and re-engineer processes from the ground up, working side by side with a team that values initiative, knowledge sharing, and bold goals. Your ideas will directly influence revenue, and you will see the tangible results of your work reflected in key financial metrics. We move fast, we cut through bureaucracy, and we take on complex challenges that push both personal and professional boundaries, limited only by the scale of your ambitions

In this role, you will

• Build, scale, and develop the Data Science team, including hiring, mentoring, and performance evaluation
• Define and execute a Data Science strategy aligned with business priorities
• Oversee the full lifecycle of DS projects from problem formulation to deploying models into production
• Prioritize initiatives based on business impact (ROI, time-to-market)
• Collaborate closely with product managers, analysts, engineers, and C-level executives

It’s all about you

• Proven ability to implement best practices in Data Science: reproducibility, A/B testing, ML monitoring
• Strong track record in maintaining model quality (performance, drift, latency)
• Advanced Python skills (pandas, sklearn, numpy, xgboost; pytorch/tf is a plus)
• High-level SQL expertise (large datasets, query optimization)
  Hands-on experience with ML pipelines, orchestration (Airflow, Prefect), and monitoring (Evidently, MLflow, Prometheus)
• Experience with GCP
• Solid understanding of A/B testing, causal inference, and statistics
• Familiarity with architecture fundamentals (API, data pipelines, microservices — integration level)
• Cloud experience with AWS or Azure
• Knowledge of distributed computation tools (e.g., Spark, CloudRun)
• Proven track record with generative AI/NLP model deployment
• Experience in startups or high-growth companies
• Publications, conference speaking, achievements on Kaggle, or open-source contributions

Would be a plus

• Experience optimizing company processes through AI solutions
• Implementation of AI tools across departments (development, support, marketing, etc.)

What we offer

Care and support: 

• 20 paid vacation days, 15 sick days, and 6 additional days off for family events
• Up to 10 additional days off for public holidays
• 100% medical insurance coverage
• Sports and equipment reimbursement
• Team building events, corporate gifts, and stylish merch
• Financial and legal support
• Position retention and support for those who join the Armed Forces of Ukraine
• Participation in social initiatives supporting Ukraine
   

Comfortable working environment:

• Work from our Kyiv hub or remotely with a flexible schedule 
• Workspace rental reimbursement in other cities and abroad
• Modern equipment or depreciation of your own tools
   

Investment in your future:

• Collaborate with a highly-skilled team of Middle & Senior professionals, sharing practical cases and expertise in the social networking niche
• 70% of our heads and leads have grown into their roles here – so can you!
• Performance-oriented reviews and Individual Development Plans (IDPs)
• Reimbursement for professional courses and English classes
• Corporate library, book club, and knowledge-sharing events
   

Hiring process

• Intro call
• Technical Interview
• Interview with Hiring Manager
• Final Interview
• Reference check
• Offer

Join us at Provectus to be a part of a team that is dedicated to building cutting-edge technology solutions that have a positive impact on society. Our company specializes in AI and ML technologies, cloud services, and data engineering, and we take pride in our ability to innovate and push the boundaries of what's possible.

As an ML Engineer, you’ll be provided with all opportunities for development and growth.

Let's work together to build a better future for everyone!
 

Requirements:

• Comfortable with standard ML algorithms and underlying math.
• Strong hands-on experience with LLMs in production, RAG architecture, and agentic systems
• AWS Bedrock experience strongly preferred
• Practical experience with solving classification and regression tasks in general, feature engineering.
• Practical experience with ML models in production.
• Practical experience with one or more use cases from the following: NLP, LLMs, and Recommendation engines.
• Solid software engineering skills (i.e., ability to produce well-structured modules, not only notebook scripts).
• Python expertise, Docker.
• English level - strong Intermediate.
• Excellent communication and problem-solving skills.
   

Will be a plus:

• Practical experience with cloud platforms (AWS stack is preferred, e.g. Amazon SageMaker, ECR, EMR, S3, AWS Lambda).
• Practical experience with deep learning models.
• Experience with taxonomies or ontologies.
• Practical experience with machine learning pipelines to orchestrate complicated workflows.
• Practical experience with Spark/Dask, Great Expectations.
   

Responsibilities:

• Create ML models from scratch or improve existing models. 
• Collaborate with the engineering team, data scientists, and product managers on production models.
• Develop experimentation roadmap. 
• Set up a reproducible experimentation environment and maintain experimentation pipelines.
• Monitor and maintain ML models in production to ensure optimal performance.
• Write clear and comprehensive documentation for ML models, processes, and pipelines.
• Stay updated with the latest developments in ML and AI and propose innovative solutions.

PIN-UP Global is an international holding company specializing in developing and implementing advanced technologies, B2B solutions and innovative products.

We ensure certification and licensing of our products, providing customers and partners of the holding company with high-quality and reliable solutions.

PIN-UP Global is represented in Cyprus, Poland, Kazakhstan, Armenia, Peru, Malta. The holding’s headquarters is located in Cyprus.

We’re looking for a sharp and driven Senior Data Analyst to join our team!

Responsibilities:

- Extracting, cleaning, and analyzing data from various sources;

- Identify reporting needs, manage priorities and assess data readiness;

- Assisting in maintaining and improving data pipelines;

- Monitoring data accuracy and identifying anomalies;

- Documenting data processing logic and analytics workflows.

Requirements:

- Proficiency in SQL;

- Understanding of data visualization principles, experience with Tableau or other BI tools;

- Familiarity with Excel/Google Sheets (pivot tables, basic formulas);

- Analytical thinking and ability to work with large datasets;

- Basic understanding of statistics and data analysis;

- Attention to detail and accuracy in data processing;

- Solid knowledge of main traffic types and their tracking;

- Strong communication and teamwork skills.

Will be plus:

- Experience with Python (pandas, NumPy) for data analysis;

- Knowledge of ClickHouse or other analytical databases;

- Experience working with APIs and automation of data collection;

- Familiarity with Jira and Confluence for task management and documentation

What are the conditions and bonuses?

🍀An exciting and challenging job in a fast-growing product holding, the opportunity to be part of a multicultural team of top professionals in Development, Engineering and Architecture, Management, Operations, Marketing, etc;

🤝Great working atmosphere with passionate IT experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed;

📍Beautiful offices in Warsaw, Limassol, Yerevan — work with comfort and enjoy the opportunity to build a network of connections with IT professionals day by day;

🧑‍💻Laptop & all necessary equipment for work according to the holding standards;

🏖Paid vacations, personal events days, days off;

🫖Paid sick leave;

👨‍⚕Medical insurance;

💵Referral program — enjoy cooperation with your colleagues and get a bonus;

📚Educational support by our L&D team: internal and external trainings and conferences, courses on Udemy;

🗣Free internal English courses;

🤸‍♀Sport benefit;

🦄Multiple internal activities: online platform with newsletters, quests, gamification, and presents for collecting bonuses, PIN-UP talks club for movie and book lovers, board games cozy evenings, special office days dedicated to holidays, etc;

🎳Company events, team buildings.

Senior Backend Developer (Node.js)

About Us

We are a leading global provider of video and audio advertising technology, helping top brands reach their target audiences through innovative programmatic solutions. Our platform leverages cutting-edge technology to offer real-time optimization, fraud detection, and a wide range of advertising formats across various devices. We are committed to redefining the digital advertising landscape and empowering our partners with the tools they need to succeed.

Role Overview

As a Senior Backend Developer, you will play a pivotal role in technically designing, developing, and maintaining new and robust backend services. You will work closely with our product and technical project managers to deliver high-quality solutions that meet our users' needs. In addition to your technical skills, we are looking for a strong leader who can independently manage and drive projects to completion.

Responsibilities

• Design, develop, and maintain robust and scalable backend systems using Node.js.
• Collaborate with the product team to understand business requirements and translate them into technical specifications.
• Lead and manage projects independently from inception to completion.
• Demonstrate experience in successfully leading projects alone.
• Optimize application performance and scalability.
• Integrate with third-party APIs and services.
• Implement and maintain secure coding practices.
• Contribute to the development and maintenance of our CI/CD pipelines.
• Mentor junior developers and share your knowledge and expertise.

Qualifications

• A Bachelor's degree in Computer Science, Software Engineering, or a related field from a reputable university.
• 4-5 years of hands-on experience as a backend developer, with a strong focus on Node.js. 
• In-depth knowledge of MySQL and Redis.
• Proven understanding and practical experience with AWS services, including Lambda, RDS, and Load Balancers.
• Experience with Docker and Kubernetes (K8s) environments.
• Ability to write effective automated tests for backend services.
• Excellent problem-solving and analytical skills.
• Strong communication and collaboration skills.
• Proven ability to lead and manage projects independently.
• Excellent spoken and written English.

Bonus Points

• Knowledge of additional programming languages or frameworks. (NestJS, etc.)
• Contributions to open-source projects.

What We Offer

• Opportunities for professional growth and development.
• A collaborative and supportive work environment.
• The chance to be part of a dynamic and innovative company.

If you are a passionate and skilled Senior Backend Developer who is looking for a challenging and rewarding opportunity, we encourage you to apply.

We’re a growing team —  no overcomplicated processes. Just people building something big and moving fast. Our COO is looking for a right hand, an Operations Manager who will bring structure, speed, and clarity into the business.

This is your chance to be at the center of execution: not following a system, but helping create it. If you thrive in fast-moving environments where ownership is real and impact is visible, this role is for you.

What you’ll do

• Keep projects on track, unblock teams, and drive follow-ups.
• Turn data into crisp dashboards & one-pagers.
• Run meetings that matter — agendas, notes, action owners.
• Coordinate across teams & partners, keep everyone aligned.
• Build SOPs & playbooks so processes scale.
• Use AI/automation to boost efficiency.

You are

• 1+ year in ops/assistant/project roles (startup = plus).
• Detail-obsessed, structured, proactive.
• Confident English (B1+).
• Solid with Google Workspace/Excel.
   

What We Offer
 

• Competitive salary with quarterly growth opportunities based on performance
• 30 business days of paid time off
• Flexible working hours focused on results (no micro-management)
• Clear career progression paths in a fast-growing company
• Full support for professional development, training, and education

• A friendly and collaborative team culture built on mutual support and open communication

  
   

👉 Not just an ops job. A launchpad.

About Us

We are a leading Israeli IT company with 15 years of market experience and 8 years in Ukraine. Officially registered in Ukraine, Israel, and Estonia, we employ over 100 professionals worldwide. Specializing in successful startup collaboration, we offer services across e-commerce, Fintech, logistics, and healthcare.
Our client is a pioneering startup that has revolutionized data management with an advanced Excel-like solution, making information input as simple as a single click. Forget mastering endless functions—this program has it all in one place. With fantastic opportunities for candidates, including the chance to work with cutting-edge technology, grow within a fast-paced, innovation-driven team, and contribute to a product that’s making a real impact. Established over six years ago and recognized as one of Israel’s top startups, this company offers a dynamic environment where your skills and ideas can truly shine.

Key Requirements:
🔹 Bachelors degree in Computer Science or related field;
🔹 5+ years of experience in software development in a SaaS company;
🔹 Fluent in Python (Django);
🔹 Excellent knowledge and experience with building, optimizing, and maintaining large-scale production systems;
🔹 Experience with writing unit tests and integration tests;
🔹 Experience with Relational DBs (Postgres, MSSQL);
🔹 Experience and familiarity with Cloud Architecture and services;
🔹 English – Upper-Intermediate or higher;

Will be plus:

🔹 Familiarity with Azure;
🔹 Knowledge of RabbitMQ;
🔹 Knowledge of Celery;
🔹 Knowledge of Redis;
🔹 Knowledge of Excel Add-Ins.

What you will do:

🔹 Take part in developing the backend of the SAAS application;
🔹 Develop and lead end-to-end development of new features and services in a multi-service environment while maintaining high quality and standards;
🔹 Develop scalable web APIs, implement sophisticated business logic, and develop asynchronous services in a data-oriented, scalable application;
🔹 Take part in a multidisciplinary team involving algorithms/frontend/UI/DevOps;
🔹 Play a significant role in the entire development life-cycle, from design to production.

Interview stages:

🔹 HR Interview;
🔹 Tech interview with Team Lead;
🔹 Interview with PM;
🔹 Interview with VP R&D (optional);
🔹 Reference check;
🔹 Offer.

Why Join Us?

🔹 Be part of a friendly international team, working together on interesting global projects;
🔹 Enjoy many chances to grow, learn from mentors, and work on projects that make a real difference;
🔹 Join a team that loves fresh ideas and supports creativity and new solutions;
🔹 Work closely with clients, building great communication skills and learning directly from their needs;
🔹 Thrive in a workplace that values your needs, offering flexibility and a good balance between work and life.

PIN-UP Global is an international holding specializing in the development and implementation of advanced technologies, B2B solutions and innovative products. We provide certification and licensing of our products, providing customers and partners of the holding with high-quality and reliable solutions.

We are looking for a Business Analyst to join our team!

Requirements:

- 2+ years of experience as a Business Analyst, Systems Analyst;

- Strong analytical and problem-solving skills to understand complex business processes, identify issues, and propose effective solutions;

- Excellent written and verbal communication skills to interact with stakeholders and to transfer received information to the developer team;

- Ability to elicit, document, and manage functional and non-functional requirements;

- Possession of a structured, process and result-oriented approach, a practical way to solve problems;

- Good understanding of the Software Development Life Cycle (SDLC);

- The flexibility to adapt to changing business environments and priorities, as well as to learn new tools and technologies;

- English Upper Intermediate level.

Responsibilities:

- Interaction with key stakeholders to gather and analyze business requirements, consulting them on opportunities and risks, describe use cases;
- Analysis of the elicited requirements and expectations and creation of requirements specifications (in the form of a user story, use cases);
- Creation and maintenance of documentation in areas of responsibility (requirements specifications, user manual, maintenance manual, etc.);
- Review and approve the user stories in collaboration with project managers and key technical specialists;
- Presentation of the user stories to the team, their clarification of incomprehensible and controversial points, and their updating and change as a result of discussion with the team;
- Interaction with QAs while preparing the test cases and testing product;
- Ownership and detailed understanding of the features and functions of products and applications from the area of ​​responsibility. This knowledge is used to identify opportunities and threats for new requirements;
- Sharing of knowledge and information with other departments of the company for the expansion and usage of advanced approaches and technologies.

What are the conditions and bonuses?

☘️An exciting and challenging job in a fast-growing holding, the opportunity to be part of a multicultural team of top professionals in Development Architecture, Management, Operations, Marketing, Legal, Finance and more;
🤝🏻Great working atmosphere with passionate experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed;
📍Beautiful offices in Warsaw, Limassol, Kyiv, Almaty, Yerevan work remotely or on-site with comfort and enjoy the opportunity to build a network of connections with professionals day by day;
🧑🏻‍💻Modern corporate equipment based on macOS or Windows and additional equipment are provided;
🏖Paid vacations, sick leave, personal events days, days off;
👨🏻‍⚕️Corporate health insurance program for your well-being;
💵Referral program enjoy cooperation with your colleagues and get the bonus;
📚Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences;
🎯Rewards program for mentoring and coaching colleagues;
🗣Free internal English courses;
🧘Yoga classes to help you stay active and energized;
✈️In-house Travel Service;
🦄Multiple internal activities: online platform for employees with quests, gamification, presents and news, PIN-UP clubs for movie / book / pets lovers, special office days dedicated to holidays;
🎳Company events, team buildings.

We are seeking an experienced Senior/Middle Data Scientist with a passion for large language models (LLMs) and cutting-edge AI research. In this role, you will design and implement a state-of-the-art evaluation and benchmarking framework to measure and guide model quality, and personally train LLMs with a strong focus on Reinforcement Learning from Human Feedback (RLHF). You will work alongside top AI researchers and engineers, ensuring our models are not only powerful but also aligned with user needs, cultural context, and ethical standards. The benchmarks and feedback loops you own serve as the contract for quality—gating releases, catching regressions before users do, and enabling compliant, trustworthy features to ship with confidence.

What you will do

• Analyze benchmarking datasets, define gaps, and design, implement, and maintain a comprehensive benchmarking framework for the Ukrainian language.
• Research and integrate state-of-the-art evaluation metrics for factual accuracy, reasoning, language fluency, safety, and alignment.
• Design and maintain testing frameworks to detect hallucinations, biases, and other failure modes in LLM outputs.
• Develop pipelines for synthetic data generation and adversarial example creation to challenge the model’s robustness.
• Collaborate with human annotators, linguists, and domain experts to define evaluation tasks and collect high-quality feedback.
• Develop tools and processes for continuous evaluation during model pre-training, fine-tuning, and deployment.
• Research and develop best practices and novel techniques in LLM training pipelines.
• Analyze benchmarking results to identify model strengths, weaknesses, and improvement opportunities.
• Work closely with other data scientists to align training and evaluation pipelines.
• Document methodologies and share insights with internal teams.

Qualifications and experience needed

Education & Experience:

• 3+ years of experience in Data Science or Machine Learning, preferably with a focus on NLP.
• Proven experience in machine learning model evaluation and/or NLP benchmarking.
• An 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.
• Solid understanding of RLHF concepts and related techniques (preference modeling, reward modeling, reinforcement learning).
• Ability to write efficient, clean code and debug complex model issues.

Data & Analytics:

• Solid understanding of data analytics and statistics.
• Experience creating and managing test datasets, including annotation and labeling processes.
• 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 is a plus.

Communication:

• Experience working in a collaborative, cross-functional environment.
• Strong communication skills to convey complex ML results to non-technical stakeholders and to document methodologies.

A plus would be

Advanced NLP/ML Techniques:

• Prior work on LLM safety, fairness, and bias mitigation.
• Familiarity with evaluation metrics for language models (perplexity, BLEU, ROUGE, etc.) and with techniques for model optimization (quantization, knowledge distillation) to improve efficiency.
• Knowledge of data annotation workflows and human feedback collection methods.

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) indicates 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 benchmarks, or familiarity with other evaluation datasets and leaderboards for large models, can be an advantage given our 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.

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 for everyone (annual or quarterly — depends on the role).
• 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.

We are seeking 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 develop model training pipelines with other talented data scientists. Your work will directly shape the quality and capabilities of our models by ensuring we feed them the highest-quality, most relevant data possible. The datasets you build directly determine model capability, safety, and cost, raising downstream task accuracy, reducing training waste, and accelerating time-to-market for product teams.

What you will do

• 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.

Qualifications and experience needed

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.).
• An 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, and data requirements.

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 is a plus.

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.
• Ability to rapidly prototype and iterate on ideas

A plus would be

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 a similar processing pipeline 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)

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 our 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.

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.

DOOR3 is seeking Senior SharePoint Engineers to contribute to the development of enterprise-grade SharePoint intranet solutions. You will work on building custom site experiences, dynamic webparts, and integrating third-party services into scalable digital workplaces based on SharePoint and a specialized customization layer on top of it.

Location: remote from Europe.

Allocation: could be full-time or part-time, depending on your availability.

Essential Job Duties:

• Work directly on a Web application development team to produce best in class production using Front-End Technologies
• Develop within MVC frameworks such as ReactJS
• Administration of SharePoint sites
• Drive key strategic ideas regarding page performance
• Working directly with our UX designers, back-end developers and clients to implement cutting-edge experiences across a variety of presentation technologies.
• Working flexibly in an Agile development environment: must be able to keep pace with the development team and adapt to changing requirements

Required Skills and Experiences:

• Strong Experience with SharePoint framework (SPFx)
• Experience with Fluent UI
• Working knowledge of HTML and CSS, including preprocessors like SASS
• Experience with Javascript Task Runners (Gulp)
• Basic understanding of ReactJS and TypeScript
• Should be well versed with code optimization techniques
• Excellent written and verbal communication skills

Preferred Qualifications:

• Experience working with JS frameworks like VueJS, Handlebars
• Experience working with PnP JS
• Experience leading a team or mentoring
• Passion for writing clean, efficient code
• Ability to manage changing priorities, solve unfamiliar problems, and meet deadlines

You Are

• A problem-solver who thrives in collaborative and evolving environments
• Comfortable working independently or as part of a distributed team, mentoring other engineers
• Able to communicate effectively with technical and non-technical stakeholders
• Passionate about clean, maintainable, and well-documented code
• At least Intermediate/B2 English across all four skills

Join DOOR3 to help us build elegant, extensible digital workplaces that transform how teams connect and collaborate. If you're excited to deliver high-quality SharePoint solutions using cutting-edge tools, we want to hear from you.

About the role

We are building a revolutionary system at the frontier of technology and AI.

As a Software Engineer, you won’t just write code — you will shape the future of how apps are built. You’ll be part of the early execution engine—shipping core capabilities, refining the experience, and elevating reliability. Expect tight loops, clear ownership, and visible impact. You will engage directly with first clients, adapt the platform to their needs, and set the stage for the next generation of software creation.

What we’re looking for

We want someone who doesn’t just “fit the role” but defines it:

• Open-minded explorer — ready to try bold ideas, new approaches, and cutting-edge tools.
• Hacker mindset & problem solver — able to connect the dots across complex systems and find elegant solutions.
• Analytical & resilient — thrives in debugging intricate, interconnected architectures.
• Startup speed enthusiast — comfortable hacking fast, shipping early, learning from feedback, and polishing later.
• Experienced in Cursor or Claude Code.
• Passionate about vibe-coding  — turning AI into your engineering team-mate.
• Natural leader — with the drive to inspire and guide people.

Why join us?

• Be among the first engineers driving a bold, world-changing vision.
• Work at the bleeding edge of technology and AI, where experimentation is not just allowed but expected.
• Direct influence on product.
• A chance to build something that reshapes how things get done in today’s world.
• A team that values curiosity, creativity, and the pure joy of hacking together the future.

This isn’t just another job. This is your chance to engineer the future of software itself.

Technical stack

Core technologies:

• TypeScript, React.js, Next.js
• ClickHouse, PostgreSQL, Redis
• Docker / Kubernetes
• Kafka
• Supabase, Inngest, Posthog

Nice to have:

• Vue.js
• Python
• Go
• Ruby

Hiring Process

Stage 1: Interview with HR (1h).
Stage 2: Technical assignment.
Stage 3: Interview with VP of Engineering.
Stage 4: Interview with the team.

What we offer for your success

• Very warm and friendly working environment and flexible working schedule.
• 20 days off + paid national holidays, and 12 sick days paid by the company per year.
• Medical insurance, and health protection programs (with COVID-19 and dental coverage).
• Continuous professional development and growth opportunities.