Dataforest

Dataforest is seeking a QA Engineer. If you are looking for a challenging project, and a friendly, supportive team ‒ you have found the right place to send your CV.

Responsibilities:

- Test web applications across the full stack: frontend (React.js, Next.js, React

Native) and backend (REST, Python, DRF/FastApi).

- Design and execute load-sensitive test scenarios specific to high-traffic

platforms (casino, gaming, fintech).

- Verify critical flows: transactions, balance updates, session integrity,

concurrent user actions, race conditions.

- Create and maintain test cases, checklists, and test documentation for

complex backend logic and business rules.

- Perform functional, regression, exploratory, and edge-case testing across the

SDLC.

- Report, track, and verify defects in JIRA with clear reproduction steps and

environment context.

- Collaborate with developers, QA leads, and product teams to clarify

requirements and cover risk areas.

- Use tools like JIRA, Confluence, and Git/Bitbucket in daily work.

Professional requirements:

- 3+ years of experience testing web applications, with a strong emphasis on

backend and API testing (REST).

- Hands-on experience with high-load platforms — casino, gaming, betting,

fintech, or similar domains.

- Deep understanding of backend testing specifics: data consistency,

concurrency, transaction flows, state management.

- Proficiency in API testing with Postman or similar tools (required, not

nice-to-have).

- Experience with database querying (SQL) for data validation.

- Knowledge of SDLC and ability to identify test coverage gaps in complex

distributed systems.

- Experience writing thorough test documentation for non-trivial backend

scenarios.

- Experience with teamwork tools: JIRA, Confluence, Git/Bitbucket.

- Strong communication skills and ability to work in a fast-paced, high-stakes

environment.

Nice to have:

- Experience with payment systems (Stripe, PaySafe, or similar) and payment flow testing.

- Understanding of RNG, game logic, or compliance requirements in

gaming/casino platforms. 

- Experience with performance or load testing basics (JMeter, k6, or similar).

- Knowledge of security testing basics relevant to financial or gaming systems

(auth flows, session handling, input validation

We offer:

- Great networking opportunities with international clients, challenging tasks;

- Building interesting projects from scratch using new technologies;

- Personal and professional development opportunities;

- Competitive salary fixed in USD;

- Paid vacation and sick leaves;

- Flexible work schedule;

- Friendly working environment with minimal hierarchy;

- Comfortable, spacious and well-equipped office in the city center;

- Team building activities, corporate events.

We are looking for a visionary and hands-on Senior Backend Developer / Tech Lead to drive the technical evolution of our high-performance microservices ecosystem at Dataforest. If you are passionate about building scalable, high-load systems, defining architectural patterns, and guiding a talented engineering team in a healthy, flexible working environment — we want you on board!

    Technical Requirements:

• 4+ years of commercial experience in backend development using Python;
• Proven track record of designing and scaling high-load (Highload) applications and distributed systems;
• Deep expertise in FastAPI (advanced async patterns, dependency injection, architecture optimization, Pydantic v2);
• Extensive hands-on experience with gRPC;
• Strong mastery of asynchronous programming in Python (asyncio, advanced concurrency models);
• Production experience with AWS infrastructure;
• Advanced knowledge of SQL  databases, mastering query optimization, indexing strategies, and database sharding/replication (e.g., PostgreSQL + SQLAlchemy/Tortoise);
• Deep understanding of microservices patterns (Event-Driven Architecture, CQRS, Saga pattern, API Gateways, Service Mesh).
   

     Optional skills (as a plus):

• Experience with message brokers and task queues (Kafka, RabbitMQ, Celery) under heavy loads.
• Experience in product & data analytics (Amplitude, Mixpanel, Power BI, Redshift);
• Advanced usage of Redis (caching strategies, pub/sub);
• Experience with third-party integrations (payments, iGaming platforms, Fireblocks, SafeHeron, CRM and similar).
   

    Key Responsibilities:

• Architecture & Leadership: Design, build, and maintain scalable backend architectures using FastAPI; establish best practices, code standards, and technical roadmaps;
• High-Load Optimization: Solve complex scalability challenges, optimize system performance, eliminate bottlenecks, and ensure low-latency data delivery;
• Microservices & Infrastructure: Own the integration and evolution of a highly distributed microservices mesh built on AWS;
• Mentorship & Code Quality: Lead technical discussions, conduct rigorous code reviews, and mentor Middle/Junior developers, fostering a culture of engineering excellence;

• Cross-functional Collaboration: Act as a key technical point of contact, collaborating with Data Science, Data Engineering, and product stakeholders to design robust data-retrieval and processing APIs.
   

  We offer:

• Great networking opportunities with international clients, challenging tasks;
• Building interesting projects from scratch using new technologies;
• Personal and professional development opportunities;
• Competitive salary fixed in USD;
• Paid vacation and sick leaves;
• Flexible work schedule;
• Friendly working environment with minimal hierarchy;
• Team building activities, corporate events.

Are you a Data Scientist with a love of LLMs, generative AI?

We are looking for a passionate Data Scientist to implement AI solutions aimed at achieving business goals.

This role offers the opportunity to work on cutting-edge AI adoption projects that helps to improve current business processes.

You'll be a great fit if you have:
• Strong Python Experience (1 year +);
• Experience with LLM , Diffusion models (1 year +);
• Knowledge of Prompt engineering;
• Experience with Gen AI-related technologies such as LangChain and RAG;
• Experience with Neural Networks (Optional) ;
• Experience with NLP , Predictive analytics and Machine learning;
• Experience with Pandas;
• Experience with SQL, including experience with large datasets;
• Strong experience in statistics;
• Bachelor's degree in Computer Science or a related field.

What you'll do:
• Develop AI agents that utilize LLM, RAG and langchain approach;
• Implement LLM and Diffusion models to boost business productivity;
• Utilize LLM (LLM Vision) to improve object detection, text classification and extraction;
• Create forecasting, recommendation, and classification models;
• Transform business challenges to AI applications;

We ensure your growth with:

• Competitive salary fixed in USD;

• Flexible working schedule and fully remote work format;

• Paid vacation days and sick leave days;

• Personal and professional development opportunities;

• Participation in building innovative projects from scratch using modern technologies;

• Team-building activities and corporate events;

• English classes and educational events.

We are looking for a Middle Python Developer with a strong focus on backend development, high-performance APIs, and microservices to join the Dataforest team. If you are looking for a friendly team, a healthy working environment, and a flexible schedule ‒ you have found the right place to send your CV.

You'll be a great fit if you have:

• 3+ years of commercial experience with Python;
• Strong production experience with FastAPI (async programming, dependency injection, Pydantic);
• Strong understanding of asynchronous programming (asyncio, multithreading/multiprocessing);
• Experience with gRPC;
• Experience with AWS services;
• Experience with SQL databases, ORMs (e.g., SQLAlchemy/Tortoise), and query optimization;
• Solid understanding of client-server models, microservices architecture, and authorization/authentication principles (OAuth2, JWT).
   

Would be a plus:

• Experience with Redis and Lua scripts;
• Experience with Celery or other async task managers/message brokers;
• Experience with third party integrations (payments, iGaming platforms, CRM and similar).
   

What you'll do:

• Designing and developing high-performance Backend APIs using FastAPI and gRPC;
• Building and maintaining applications with a distributed microservices architecture;
• Writing efficient asynchronous logic and integrating third-party services;
• Developing data-retrieval applications and specialized scripts (similar to DAGs in Airflow or AWS Lambdas) to process information for further DS and DE workflows;

• Optimizing database queries and API performance to ensure low latency.

  
  We ensure your growth with:

• Competitive salary fixed in USD
• Flexible working schedule and fully remote work format
• Paid vacation days and sick leave days 
• Personal and professional development opportunities
• Participation in building innovative projects from scratch using modern technologies
• Team-building activities and corporate events
• English classes and educational events.

Join the Dataforest Team!

We are actively expanding our team and looking for strong new talent to join our ranks. If you are a Data Engineer seeking a friendly team, a healthy working environment, and a flexible schedule — you have found the right place to send your CV!

You'll be a great fit if you have:

- 2+ years of experience with Python;
- 2+ years of experience as a Data Engineer;
- Experience with Pandas;
- Experience with SQL DB / NoSQL (Redis, Mongo, Elasticsearch) / BigQuery;
- Familiarity with Amazon Web Services;
- Experience with Kafka;
- Knowledge of data algorithms and data structures is a MUST;
- Working with high volume tables 10m+.

What you'll do:

- Create ETL pipelines and data management solutions (API, Integration logic);
- Different data processing algorithms;
- Involvement in creation of forecasting, recommendation, and classification models.

Would be a plus:

- Experience with Spark (pyspark);
- Experience with Airflow;
- Experience in statistics;
- Knowledge of DS and Machine learning algorithms.

We ensure your growth with:

- Great networking opportunities with international clients, challenging tasks;
- Building interesting projects from scratch using new technologies;
- Personal and professional development opportunities;
- Competitive salary fixed in USD;
- Paid vacation and sick leaves;
- Flexible work schedule;
- Friendly working environment with minimal hierarchy;
- Team building activities, corporate events.

Dataforest is seeking a QA Engineer to join our team. If you’re a strong Manual QA who actively uses AI to generate test data and write basic checks faster — you’ve found the right place. We’d love to see your CV!

    What you'll do:

• Conduct manual testing of web applications, assessing both frontend UI/UX and backend API behavior.
• Perform functional, regression, integration, and exploratory testing throughout the entire SDLC.
• Perform API testing using Postman or similar tools.
• Perform database validation using SQL queries to verify data integrity, transformations, and backend logic.
• Using AI create and maintain test documentation (test cases, checklists, bug reports).
• Leverage AI assistants (e.g. Claude) to create automated API and E2E scripts to optimize manual QA workflows.
• Collaborate closely with developers and project managers to maintain high quality standards across the SDLC.
   

     You'll be a great fit if you have:

• 2+ years of hands-on QA experience with web applications built on modern JS frameworks (React, Vue, Angular, pure JS) and REST APIs.
• Active use of AI in your workflow: practical experience applying AI tools for automation, test case generation, or troubleshooting.
• API testing experience using Postman (collections, environments, basic scripts).
• SQL skills for database querying and data validation.
• Solid understanding of the Software Development Life Cycle (SDLC) and QA methodologies.
• Hands-on experience writing clean, comprehensive test documentation.
• Proficiency with teamwork tools: JIRA, Confluence, Git/Bitbucket.
• Strong communication skills and a positive, team-oriented mindset.
• English level: Intermediate (B1) or higher (strong written and spoken communication for daily team collaboration).
   

     Would be a plus:

• Experience testing Stripe, PayPal, or other third-party payment integrations.
• Basic understanding of CI/CD pipelines and how QA fits into automated delivery workflows.
• Experience testing data engineering projects: ETL pipelines, data warehouses, or data integration workflows.
• Experience with web scraping projects — understanding of scraping logic, data extraction validation, and edge case handling.
• Experience with AI/ML product testing — familiarity with testing LLM-based features, recommendation systems, or other non-deterministic outputs.
  
  We ensure your growth with:
• Competitive salary fixed in USD
• Flexible working schedule and fully remote work format
• Paid vacation days and sick leave days 
• Personal and professional development opportunities
• Participation in building innovative projects from scratch using modern technologies
• Team-building activities and corporate events
• English classes and educational events.

Are you a Data Scientist with a love of LLMs, generative AI?

We are looking for a passionate Data Scientist to implement AI solutions aimed at achieving business goals.

This role offers the opportunity to work on cutting-edge AI adoption projects that helps to improve current business processes.

You'll be a great fit if you have:
• Strong Python Experience (1 year +);
• Commercial experience with LLM , Diffusion models (1 year +);
• Knowledge of Prompt engineering;
• Experience with Gen AI-related technologies such as LangChain and RAG;
• Experience with Neural Networks (Optional) ;
• Experience with NLP , Predictive analytics and Machine learning;
• Experience with Pandas;
• Experience with SQL, including experience with large datasets;
• Strong experience in statistics;
• Bachelor's degree in Computer Science or a related field.

What you'll do:
• Develop AI agents that utilize LLM, RAG and langchain approach;
• Implement LLM and Diffusion models to boost business productivity;
• Utilize LLM (LLM Vision) to improve object detection, text classification and extraction;
• Create forecasting, recommendation, and classification models;
• Transform business challenges to AI applications;

We ensure your growth with:

• Competitive salary fixed in USD;

• Flexible working schedule and fully remote work format;

• Paid vacation days and sick leave days;

• Personal and professional development opportunities;

• Participation in building innovative projects from scratch using modern technologies;

• Team-building activities and corporate events;

• English classes and educational events.

We are seeking a highly skilled and experienced Team Lead Python/Django to join our dynamic team.

As a Team Lead, you will be an expert and a leader, playing a crucial role in guiding the development team, making technical decisions, and ensuring the successful delivery of high-quality software products.

You'll be a great fit if you have:

- 5+ years of experience with Python 3.4+;

- 4+ years of experience with Django/DRF and RESTful APIs;

- Experience working with relational and NoSQL databases (PostgreSQL, MongoDB, etc.);

- Familiarity with Elasticsearch;

- Knowledge of cloud solutions: AWS, GCP, Azure;

- Experience in multithreading/multiprocessing approaches;

- Proven experience in supporting and developing existing high-load projects;

- Proficiency with Docker, Kubernetes, and CI/CD pipelines;

- Previous experience in a Team Lead role;

- English proficiency — Upper-intermediate.

What you'll do:

- Lead and manage the Backend department and development process, providing support to team members.
- Develop and contribute to Backend Architecture.
- Participate in pre-sale activities
- Participate in decision-making processes related to design architecture, solution development, architectural, and code reviews.
- Write clean, well-structured, and maintainable code while maintaining high coding standards within the team.
- Develop high-load solutions and conduct R&D work with new technology.

Would be a plus:

- Experience with Celery;

- Experience with payment systems integrations.

We ensure your growth with:

- Great networking opportunities with international clients, involving challenging tasks;

- Involvement in building interesting projects from scratch using new technologies;

- Personal and professional development opportunities

- Competitive salary fixed in USD;

- Paid vacation and sick leaves;

- Flexible work schedule;

- Friendly working environment with minimal hierarchy;

- Comfortable, spacious, and well-equipped office in the city center;

- Team-building activities, corporate events.

Dataforest is looking for a Data Engineer to join an interesting software development project in the field of Cybersecurity. Our client’s platform offers Identity Insights drives real-time, multi-contextual digital forensics to protect new account opening workflows and expose fake accounts already in a customer database.

You'll be a great fit if you have:

- 3+ years of hands on in data engineering;
- 3+ years of commercial experience with Python;
- Advanced experience with SQL DBs (optimisations, monitoring, etc.);
- Advanced experience with PySpark;
- Solid understanding of ETL principles (architecture/ monitoring/ alerting/search and resolve bottlenecks);
- Familiar with AWS infrastructure (boto3, S3 buckets, etc);
- Experience working with large volumes of data;
- Understanding the principles of medallion architecture.

Would be a plus:

- Cassandra/Scylla
- PostgreSQL
- Pandas
- Experience with Kafka and Redis

What you'll do:

- Maintain data processing architecture using Python and PySpark that interacts with ScyllaDB & PostgreSQL.
- Work with Databricks infrastructure to ensure reliability, scalability, and cost efficiency.
- Proactively identify bottlenecks and suggest technical improvements.

We ensure your growth with:

- Working in a fast-growing company;
- Great networking opportunities with international clients, challenging tasks;
- Personal and professional development opportunities;
- Competitive salary fixed in USD;
- Paid vacation and sick leaves;
- Flexible work schedule;
- Friendly working environment with minimal hierarchy;
- Team building activities, corporate events.

Are you a Data Scientist with a love of LLMs, generative AI?

We are looking for a passionate Data Scientist to implement AI solutions aimed at achieving business goals.

This role offers the opportunity to work on cutting-edge AI adoption projects that helps to improve current business processes.
 

     You'll be a great fit if you have:

•  Strong Python Experience (2 year +);
• Experience with LLM , Diffusion models;
• Knowledge of Prompt engineering;
• Experience with Gen AI-related technologies such as LangChain and RAG;
• Experience with Neural Networks (Optional) ;
• Experience with NLP , Predictive analytics and Machine learning;
• Experience with Pandas;
• Experience with SQL, including experience with large datasets;
• Strong experience in statistics;

• Bachelor's degree in Computer Science or a related field.
   

  What you'll do:

• Develop AI agents that utilize LLM, RAG and langchain approach;
• Implement LLM and Diffusion models to boost business productivity;
• Utilize LLM (LLM Vision) to improve object detection, text classification and extraction;
• Create forecasting, recommendation, and classification models;
• Transform business challenges to AI applications.
   

     We ensure your growth with:

• Competitive salary fixed in USD;
• Flexible working schedule and fully remote work format;
• Paid vacation days and sick leave days ;
• Personal and professional development opportunities;
• Participation in building innovative projects from scratch using modern technologies;
• Team-building activities and corporate events;
• English classes and educational events.

Dataforest helps businesses unlock the value of their data through AI, Data Engineering, Advanced Analytics and custom Web Product Development. We build scalable digital solutions for clients worldwide, driven by a culture of results, flexibility and collaboration.

Now we`re looking for a Senior Project Manager to join our team.

    You'll be a great fit if you have:

• PM Experience: 4+ years of project management experience specifically in an IT outsourcing/outstaffing company (must-have).
• English Level: C1 (Advanced) — fluent written and spoken communication skills for daily interaction with international clients.
• Agility & Context-Switching: Proven ability to switch context seamlessly and effectively manage multiple streams or teams simultaneously.
• Web Dev & Methodologies: Hands-on experience managing web development projects; deep knowledge of Agile (Scrum, Kanban) and Waterfall frameworks.
• Planning & Execution: Strong background in project planning, estimation, roadmap creation, and defining key performance metrics (KPIs/OKRs).
• Documentation & Tools: Deep understanding of project documentation standards and solid experience with task-tracking tools (Jira, Confluence, etc.).
   

     What you’ll do:

• Cross-Functional Team & Coordination: Coordinate cross-functional teams (developers, designers, QAs, and other specialists) across multiple autonomous project streams.
• Drive & Enhance AI-Driven SDLC: Take initiative in optimizing and scaling software development processes using modern AI tools and practices.
• Resource & Capacity Management: Take full ownership of team capacity and resource allocation; plan timelines, set objectives, and manage task assignments.
• Define & Track Success Metrics: Establish, monitor, and report on key project health and delivery metrics at every stage.
• Stakeholder Management: Maintain clear, proactive communication with key client stakeholders, internal dev teams.
  
  We ensure your growth with:
• Competitive salary fixed in USD
• Flexible working schedule and fully remote work format
• Paid vacation days and sick leave days 
• Personal and professional development opportunities
• Participation in building innovative projects from scratch using modern technologies
• Team-building activities and corporate events
• English classes and educational events.

We are looking for a Webflow Developer to join the Dataforest team. If you are looking for a friendly team, a healthy working environment, and a flexible schedule ‒ you have found the right place to send your CV.
Attach your portfolio or examples of work to your resume.

What you'll do:
 

- Webflow development and ongoing support for the company website: dataforest.ai

- Designing and building responsive web interfaces on the Webflow platform.

- Managing and supporting Webflow CMS (Collections, Templates, Dynamic Pages) ‒ specifically for Case Studies and Blog pages.

- Integrating third-party services (Google Analytics, GTM, HubSpot, Zapier, custom forms, etc.).

- Writing and implementing custom HTML, CSS, and JavaScript to build non-standard features and functionality.

- Optimizing website speed, Core Web Vitals, and overall performance.

- Setting up basic technical SEO (meta tags, schema markup, sitemap, redirects, Open Graph).

- Publishing new site builds, post-release maintenance, tracking, and fixing bugs.

- Working closely with UX/UI designers, marketers, Project Managers, and the rest of the team to execute projects.

You'll be a great fit if you have:
 

- 1+ years of experience working with Webflow and other web development platforms.

- Strong hands-on experience with HTML/CSS and JavaScript for custom solutions.

- Solid experience with Webflow CMS, custom code integrations, and third-party tools.

- Excellent graphic design skills, with a strong focus on Figma.

- Clear understanding and practical experience with UX/UI design.

- Understanding of technical SEO basics, performance optimization, and Core Web Vitals.

- Attention to detail, thoroughness, and ability to deliver quality work within tight deadlines.

We ensure your growth with:
 

- Working in a fast-growing company;

- Great networking opportunities with international clients and challenging tasks;

- Competitive salary fixed in USD;

- Flexible work schedule;

- Friendly working environment with minimal hierarchy;

- Team building activities and corporate events.

We are looking for an experienced and proactive Senior Project Manager to join our team at Dataforest and lead a long-term, high-scale FinTech project.

About the Project:
Our client is building a powerful B2B SaaS platform designed to revolutionize chargeback management, featuring enterprise-grade API integrations (Ethoca, Verifi), seamless payment processor connections (Stripe, Shopify, Braintree), and real-time dispute alerts. We are actively developing and scaling multiple product streams, including Business Health, Dispute Management, and others.

    You'll be a great fit if you have:

• 5+ years of PM experience, specifically in an IT outsourcing company (must-have).
• Domain expertise: Mandatory experience in FinTech / Payments.
• English level: C1 (Advanced) — strong written and spoken communication skills.
• Skills: Excellent ability to context-switch between dynamic tasks and effectively manage multiple teams/streams.
• Web Dev & Methodology: Proven experience managing web development projects; strong expertise in Agile/Scrum, Kanban, and Waterfall methodologies.
• Planning & Execution: Strong knowledge of project planning, estimation, and defining success metrics.
• Track record of managing teams of 20+ members.

• Documentation & Tools: Deep understanding of project documentation and hands-on experience with task tracking systems (Jira, Confluence, etc.).
   

  Will be plus:

• Domain expertise: Mandatory experience in FinTech / Payments.
   

     What you’ll do:

• Lead a large-scale project: Coordinate up to 30 team members structured into up to 10 autonomous sub-teams.
• Drive & improve AI-driven SDLC: Manage, optimize, and take full initiative in improving project delivery processes using modern AI tools and practices.
• Resource & Capacity Management: Plan and document project objectives, timelines, tasks, and work assignments while taking full ownership of team capacity and resource allocation.
• Define and track project success metrics.
• Set tasks for team members (developers, designers, QAs, and other specialists).
• Stakeholder Management: Maintain full, effective interaction with the development team, key clients, and external 3rd-party providers/integrations (e.g., Visa, Mastercard, payment gateways, etc.).
  
  We ensure your growth with:
• Competitive salary fixed in USD
• Flexible working schedule and fully remote work format
• Paid vacation days and sick leave days 
• Personal and professional development opportunities
• Participation in building innovative projects from scratch using modern technologies
• Team-building activities and corporate events
• English classes and educational events.