Freelance AI Trainer - Data Annotation Specialist

Mindrift seeks a Freelance Python Data Scraping Engineer to join the Tendem project. This is a remote, part-time contract role for candidates based in Israel. The position involves integrating advanced data scraping workflows into a hybrid system that combines AI with human input. Collaboration with Tendem Agents is central, as they manage repetitive tasks while the engineer ensures technical precision and data quality. Key responsibilities Extract structured data from complex websites, managing the full process from collection to delivery. Utilize internal tools such as Apify and OpenRouter, alongside custom workflows, to streamline data gathering, validation, and task management. Adapt scraping techniques for dynamic and interactive web sources, including sites with JavaScript-rendered content or frequent structural changes. Enforce data quality through validation checks, ensuring consistency across sources and compliance with formatting standards. Scale scraping operations for large datasets using batching or parallelization, monitor for failures, and maintain resilience to minor site updates. Requirements Minimum 3 years of experience in data engineering, web scraping, and automation. Compensation Contributors may earn up to $32 per hour, depending on expertise and pace. Actual rates vary by project, reflecting scope, complexity, and required skills. Application process Interested candidates should submit an application to qualify for freelance projects that align with their technical experience. The role offers flexible scheduling and the chance to contribute to projects involving coding, automation, and AI output refinement, supporting both AI development and practical uses.

Role overview Jobgether is hiring a Senior Python Data Scraping Engineer for a freelance position based in Israel. This role offers remote flexibility and involves collaboration with a partner organization. The focus is on building and maintaining sophisticated data extraction systems that support AI and analytics initiatives. What you will do Design and implement scalable web data extraction pipelines for large and complex datasets. Create advanced scraping solutions for dynamic websites, adapting to frequent changes in site structure and content. Work with hybrid AI-human workflows, partnering with AI-driven agents to improve data validation and quality control. Deliver structured, accurate, and validated data to support downstream projects. Share technical expertise to refine scraping strategies and uphold reliability standards. Requirements Deep experience with Python, especially for web scraping and data extraction tasks. Track record of engineering resilient and scalable scraping tools for complex, changing web environments. Keen attention to detail and a focus on producing precise, high-quality datasets. Ability to work independently as a remote freelancer. Experience with both human and AI-driven workflows is a plus. Location This position is open to candidates based in Israel. Remote work is available.

Please submit your CV in English and include your English proficiency level. toloka-ai, in partnership with Mindrift, connects specialists with project-based AI assignments for top technology companies. This freelance role focuses on evaluating, refining, and developing AI systems. It is not a permanent position. Role overview This freelance project suits optical engineers who enjoy designing computational physics problems and working with Python. Assignments involve creating and verifying complex tasks that reflect real research workflows in physics. What you will do Develop original computational physics problems that resemble actual research scenarios. Create challenges requiring Python programming, using libraries such as Numpy, SciPy, or Sympy. Design computationally intensive tasks that cannot be solved manually within a reasonable time. Build problems involving advanced reasoning in mechanics, electromagnetism, thermodynamics, and quantum mechanics. Base challenges on real research questions or practical applications in physics. Verify solutions in Python, applying established simulation libraries. Write clear, detailed problem statements and provide validated solutions. Requirements Degree in Physics (theoretical, experimental, or computational) or a closely related field. Strong Python skills for numerical validation. Experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar tools is also valued. At least 2 years of professional experience in applied, research, or academic settings. Familiarity with numerical simulation methods. Ability to design problems that reflect authentic research processes in physics. Creative approach to developing problems across multiple areas of physics. Understanding of modeling and approximation techniques in physics. Excellent written English (C1 level or higher). How to apply Apply Pass qualifications Join a project Complete assigned tasks Receive compensation Time commitment Active projects typically require about 10–20 hours per week, though actual hours may vary depending on project needs. Workload is not guaranteed and may fluctuate. Compensation Contributors can earn up to $35 per hour, depending on project scope, complexity, and required expertise. Pay rates may differ by project and are based on the nature and pace of the work.

Role overview Toloka AI seeks a Freelance Mechanical Engineer with advanced Python skills to contribute to AI model training projects. This position is fully remote and open to professionals based in Israel. Key responsibilities Apply mechanical engineering knowledge to enhance AI training methods and outcomes Develop, test, or refine Python-based tools and workflows that support AI and machine learning efforts Work collaboratively on projects centered around artificial intelligence and machine learning Work arrangement This freelance role offers flexibility to work from any location within Israel. Set your own schedule while contributing to Toloka AI's ongoing projects.

Role overview Toloka AI seeks a freelance AI trainer with expertise in civil engineering and strong Python programming skills. This position is fully remote and available to candidates based in Israel. What you will do Use civil engineering knowledge and Python to contribute to the training and improvement of AI models. Work closely with Toloka AI's team to assist in developing advanced AI systems. Location This is a remote role for candidates residing in Israel.

Submit your CV in English and include your English proficiency level. toloka-ai, in partnership with Mindrift, offers remote, project-based roles for experienced electrical engineers with strong Python skills. These freelance positions focus on supporting AI projects for major technology companies. Work is flexible and not tied to permanent employment. Role overview As a contributor, tasks vary by project. Typical responsibilities include designing computational engineering problems inspired by real-world scenarios, developing coding challenges that use Python for calculations and simulations, and ensuring tasks involve significant computation or iterative solutions. Contributors may also create challenges in system design, optimization, and analysis, and formulate problems based on current research or practical engineering needs. Verifying solutions in Python with common engineering libraries and writing clear, accurate problem statements are also key parts of the work. Requirements Degree in Electrical Engineering or a closely related field Proficiency in Python for numerical work Experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar tools is valued Minimum of 2 years in applied, research, or teaching roles Understanding of practical engineering constraints and approximations Strong written English skills at C1 level or above Professional certifications (such as CMME, SAS Certifications, CAP) and international or applied project experience are considered a plus Application process Apply Pass qualifications Join a project Complete assigned tasks Receive compensation Workload and commitment Active project phases usually require 10-20 hours per week. Actual hours may vary based on project needs, and work is not guaranteed outside of active assignments. Compensation Earnings can reach up to $37 per hour, depending on expertise and the speed of contributions. Pay is determined by project scope, complexity, and required skills.

Please submit your CV in English and indicate your English proficiency level. toloka-ai, through the Mindrift platform, offers project-based freelance work focused on AI system testing and improvement. These freelance assignments are remote and based in Israel, and do not represent permanent employment. Role overview This freelance role centers on designing and validating advanced computational statistics challenges. The work involves creating original problems that reflect real mathematical research, often requiring Python programming and use of libraries such as Numpy, SciPy, or Sympy. Assignments emphasize computationally intensive tasks that go beyond manual calculation, and often draw from authentic research questions or practical scenarios in mathematics. What you will do Create computational statistics problems that mirror real research. Design challenges solvable with Python, using libraries like Numpy, SciPy, or Sympy. Develop problems requiring significant computation, not feasible to solve by hand. Write tasks involving advanced reasoning in number theory, combinatorics, graph theory, and numerical analysis. Base problems on genuine research or practical mathematical situations. Validate solutions in Python with standard mathematical libraries. Document problems clearly and provide verified answers. Requirements Degree in Statistics or a related discipline. Strong Python skills for numerical validation. Familiarity with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar tools is a plus. At least 2 years of experience in applied, research, or teaching roles. Excellent written English at C1 level or above. Professional certifications (such as CMME, SAS Certifications, CAP) and experience with international or applied projects are advantageous. Project process Apply Complete qualifications Join a project Fulfill assigned tasks Receive compensation Time commitment During active project phases, tasks generally require 10 to 20 hours per week. Actual workload may vary and is not guaranteed, depending on project needs. Compensation Earnings can reach up to $39 per hour, depending on experience and work pace. Rates may vary across projects based on complexity and requirements. Other projects on the platform may offer different earning potential.

About ClickHouseListed among the 2025 Forbes Cloud 100, ClickHouse stands out as a pioneering and rapidly expanding private cloud organization. With a robust customer base exceeding 3,000 and an annual recurring revenue (ARR) growth surpassing 250% year-on-year, we are at the forefront of real-time analytics, data warehousing, observability, and AI workloads.Our recent $400M Series D funding round validates our continuous momentum. In the last quarter, notable clients such as Capital One, Lovable, Decagon, Polymarket, and Airwallex have either implemented or expanded their use of our platform, joining a prestigious roster of AI innovators and global brands including Meta, Cursor, Sony, and Tesla.Join us in our mission to revolutionize data utilization across industries!The Connectors team serves as the vital link between ClickHouse and the expansive data ecosystem. We design and maintain integrations that empower millions of developers, data professionals, and AI systems worldwide, ranging from advanced data visualization tools (like Tableau, PowerBI, Superset, Metabase) to connectors for data processing frameworks (including Apache Spark, Flink, Kafka Connect, Fivetran), orchestration platforms, and AI toolsets.Our efforts are integral in shaping how organizations handle vast datasets, from real-time analytics platforms managing millions of events per second to observability systems that monitor global infrastructures, and increasingly, AI-driven data applications that redefine team workflows. We collaborate closely with the open-source community, internal teams, and enterprise users to ensure our integrations set new benchmarks in performance, reliability, and user experience.About the RoleAs a Senior Software Engineer with expertise in Python and the Data Ecosystem, you will play a pivotal role in developing and advancing key components of ClickHouse's data engineering ecosystem. This position intersects high-performance database engineering and user experience. Your contributions will involve creating tools that enable Data Engineers and Data Scientists to leverage ClickHouse's speed and scalability seamlessly within their existing frameworks.We seek a candidate who has firsthand experience as a Data Engineer or Data Scientist. The landscape for data practitioners is evolving rapidly: databases are transforming from mere query targets to active participants in AI-driven workflows, functioning as vector stores for retrieval-augmented generation (RAG) pipelines, backends for large language model (LLM)-driven agents, and real-time feature stores for machine learning inference. You comprehend these workflows not from an external viewpoint but from active engagement. You don’t just develop integrations; you provide product-level insights that drive innovation.

Please submit your CV in English and indicate your English proficiency level. Mindrift connects skilled specialists with project-based AI initiatives for leading tech companies. The focus is on testing, evaluating, and improving AI systems. This is a project-based freelance role, not a permanent position. What you will do Create original computational mathematics problems that reflect real mathematical research methods. Develop problems that require Python programming to solve, using libraries such as Numpy, SciPy, and Sympy. Ensure problems are computationally intensive and cannot be solved manually within days or weeks. Design challenges involving advanced reasoning in areas like number theory, combinatorics, graph theory, and numerical analysis. Base problems on genuine research questions or practical mathematical applications. Validate solutions in Python with established mathematical libraries. Document each problem clearly, providing both the statement and a verified solution. Requirements Degree in Mathematics (Pure or Applied) or a closely related field. Proficiency in Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or Stata, or knowledge of another programming language is also acceptable. At least 2 years of professional experience, which may include research, teaching, or applied work. Familiarity with numerical methods and symbolic computation. Ability to design problems that mirror authentic mathematical research workflows. Understanding of computational complexity theory. Strong written English skills at C1 level or higher. Application process The process includes: Apply → Complete qualifications → Join a project → Execute tasks → Receive payment. Project commitment During active phases, tasks are expected to require approximately 10–20 hours per week. This estimate depends on project needs and is not a guaranteed workload. Compensation Contributors may earn up to $35 per hour, depending on expertise and pace. Actual compensation varies by project scope, complexity, and required skills. Other projects on the platform may offer different earning potential based on their requirements.

Toloka AI is seeking a freelance specialist with strong expertise in biology and Python programming. This remote role, based in Israel, centers on supporting AI training efforts with hands-on subject matter knowledge. Role overview This position involves developing training materials that help improve artificial intelligence systems, with a focus on biological data. The work includes designing content, guiding AI models, and ensuring accurate interpretation of complex biological information. What you will do Create clear and effective training content for AI models in the biology domain Facilitate learning experiences that connect biological concepts with Python programming Guide AI systems to better understand and process biological data Requirements Expertise in biology Strong programming skills in Python Ability to explain biological concepts and coding techniques clearly

Please submit your CV in English and specify your English proficiency level. Mindrift connects professionals with project-based AI assignments for leading technology companies. The focus is on testing, evaluating, and improving AI systems. All positions are project-based and do not offer permanent employment. Role overview This freelance, remote position is open to candidates based in Israel. The role centers on supporting AI development by designing and validating advanced computational physics problems. Work is organized on a project basis. What you will do Create original computational physics problems that reflect real research methodologies Develop challenges that require Python programming to solve, using libraries such as Numpy, SciPy, or Sympy Design tasks that are computationally demanding and would take significant manual effort to solve Formulate problems involving complex reasoning in areas like mechanics, electromagnetism, thermodynamics, and quantum mechanics Base assignments on authentic research questions or practical applications in physics Verify solutions using Python and established physics simulation tools Document problem statements clearly and supply confirmed correct answers Requirements Degree in Physics (theoretical, experimental, or computational) or a related discipline Experience using Python for numerical validation; familiarity with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar tools is a plus At least 2 years of relevant experience in applied, research, or teaching roles Background in numerical simulation techniques Ability to design problems that mirror real-world research workflows Creative problem-solving skills across multiple physics domains Understanding of physics modeling and approximation methods Strong written English skills at C1 level or above Project workflow Apply Complete qualifications Join a project Carry out assigned tasks Receive payment Time commitment During active projects, expect to spend approximately 10–20 hours per week on tasks. Actual workload may vary based on project needs. Compensation Contributors can earn up to $35 per hour, depending on their contributions and pace. Rates vary by project according to the scope, complexity, and required expertise.

Please submit your CV in English and specify your English proficiency level. toloka-ai, in partnership with Mindrift, offers contract-based, project work for professionals interested in evaluating, testing, and improving AI systems. This is a freelance role, not a permanent staff position. Role overview The Freelance AI Evaluation Engineer will contribute to building a dataset focused on assessing AI coding agents. The main goal is to evaluate how these agents perform on real-world developer tasks. Main responsibilities Set up virtual companies using a strategic plan, including codebases, infrastructure, and supporting context such as conversations, documentation, and tickets to create realistic development scenarios. Design and calibrate tasks representing different stages within the virtual company. This involves writing prompts, defining evaluation metrics, and ensuring tasks are solvable and fairly assessed. Create tasks in isolated environments that mimic a developer’s workstation. Use a Linux setup with development tools (terminal, CLI), MCP servers (repository, task tracker, messenger, documentation), and a real web application codebase. Develop tests that accept all valid solutions and reject incorrect ones. Balance strictness and flexibility to avoid penalizing good approaches or allowing flawed solutions. Work with an AI agent on test cases to ensure the tests catch real issues and do not miss poor solutions or unfairly block correct ones. Review code generated by AI agents, analyze reasons for success or failure, and create edge cases and adversarial scenarios to deepen evaluation. Refine your work based on feedback from expert QA reviewers to meet established quality standards. Important notes This is not a data labeling position. This is not a prompt engineering role. Writing code from scratch is not required. The AI agent handles most coding; the focus is on guiding and evaluating its output. Much of the work involves collaborating closely with AI systems. Crafting tasks that challenge advanced models means working alongside those same models throughout the process.

Submit your CV in English and specify your English proficiency level. Mindrift offers project-based freelance roles for professionals interested in AI education. This remote position, open to candidates based in Israel, focuses on creating and validating computational chemistry problems for AI system evaluation. Engagements are project-based rather than permanent employment. What you will do Design computational chemistry problems that reflect real-world research workflows. Develop problem sets requiring Python programming for solutions, using libraries such as numpy, scipy, and chemistry-specific packages. Ensure problems are computation-intensive and not easily solvable by hand within a reasonable timeframe. Create tasks involving advanced reasoning in physical chemistry, quantum chemistry, and molecular modeling. Base scenarios on authentic research challenges or practical chemistry applications. Validate solutions in Python, applying established computational chemistry methods. Document problems clearly and provide accurate, verified solutions. Requirements Degree in Chemistry or a related field. Proficiency in Python for numerical validation. Experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or other relevant programming languages is also acceptable. At least 2 years of relevant experience (applied, research, or teaching). Familiarity with numerical methods in chemistry and computational chemistry concepts. Strong written English skills at C1 level or above. How projects work The process includes application, passing qualifications, joining a project, completing assigned tasks, and receiving payment. Time commitment During active project phases, expect approximately 10–20 hours of work per week, depending on project needs. Actual workload may vary. Compensation Earn up to $35 per hour, based on experience and contribution speed. Payment depends on project scope, complexity, and expertise required. Other projects on the platform may offer different rates.

Please submit your CV in English and indicate your level of English proficiency. Mindrift connects specialists with project-based AI work for leading technology companies. The platform focuses on testing, evaluating, and improving AI systems. All roles are flexible and non-permanent. Role overview This freelance position centers on applying material science expertise and Python skills to help train and evaluate AI systems. Projects change over time, but the core work involves creating and validating engineering problems that reflect real-world scenarios. What you will do Design original materials that reflect authentic engineering challenges Create programming problems using Python for calculations and simulations Ensure tasks require computational work, numerical methods, or iterative solutions Develop projects focused on system design, optimization, and analysis Base problems on real research issues or practical engineering situations Verify solutions using Python and standard engineering libraries Document problem statements clearly and provide validated solutions Requirements Degree in Material Science or a closely related field Strong Python skills for numerical validation; familiarity with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar tools is a plus At least 2 years of relevant experience, including applied research or teaching Understanding of practical engineering constraints and approximations Excellent written English at C1 level or higher How to get started Apply Pass qualification(s) Join a project Complete tasks Get compensated Project commitment During active project phases, tasks usually require 10–20 hours per week. Actual workload may vary depending on project needs. Compensation Contributors can earn up to $35 per hour, depending on the nature and complexity of the project. Pay varies by project scope.

Please submit your CV in English and include your English proficiency level. Role overview This freelance, project-based contract with Toloka AI (via Mindrift) centers on evaluating and improving AI systems. The work involves designing and solving advanced computational physics problems for major technology clients. This is not a permanent position, but rather a contract role tied to specific projects. What you will do Develop original computational physics problems that closely mirror real research workflows. Create challenges that require Python programming to solve, using libraries such as Numpy, SciPy, and Sympy. Ensure problems are complex enough that they cannot be solved manually within a reasonable time. Design tasks that require advanced reasoning in areas like mechanics, electromagnetism, thermodynamics, and quantum mechanics. Base problems on authentic research questions or practical scenarios in physics. Validate solutions using Python and established simulation tools. Clearly document each problem statement and provide accurate, verified solutions. Requirements Degree in Physics (theoretical, experimental, or computational) or a related discipline. Experience using Python for numerical validation. Familiarity with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar tools is also acceptable. Minimum of 2 years of professional experience in research, application, or teaching. Proficiency in numerical simulation methods. Ability to design problems that reflect real research practices in physics. Creativity in problem-solving across multiple areas of physics. Understanding of physics modeling and approximation techniques. Strong written English skills at C1 level or higher. How to apply Submit your application. Complete the qualification steps. Join a project when selected. Work on assigned tasks. Receive compensation after completing your work. Time commitment Project tasks generally require 10–20 hours per week during active phases. Actual workload may shift based on project demands. Compensation Earn up to $35 per hour, depending on contribution and efficiency. Rates vary by project according to complexity and expertise needed. Other projects on the platform may offer different compensation based on their requirements. Location: Remote , Israel

About the Role Tipalti Solutions is growing and looking for a Data Engineer in the Tel Aviv District. This role centers on developing and refining data integration processes, building data pipelines, and strengthening the company’s data platform. The position supports analytics across teams, systems, and products. What You Will Do Design and implement ELT and streaming processes, including SQL queries, to move data between the data warehouse and other sources. Create scalable, automated workflows for large-scale data analysis. Help develop dashboards and datasets that deliver actionable insights. Work with business owners to build datasets tailored to their specific questions. Collaborate with analytics and business teams to improve data models for business intelligence tools and support data-driven decisions. Partner with engineering teams to plan long-term data platform architecture. Maintain and enhance data lake pipelines, including schema management and ongoing improvements. Who Succeeds Here This role suits someone who enjoys building and optimizing data systems from the ground up, manages data efficiently, and works well with diverse teams. A self-motivated approach and an interest in evolving data architecture are important.

Join our dynamic Platform Infrastructure team as a Senior Software Engineer, where you will be instrumental in designing and building the core Axonius Platform that underpins all current and future offerings. You will confront challenging engineering challenges across the entire stack, from low-level system configurations to advanced distributed backend applications. By joining our diverse global team, you'll serve as a technical beacon, conducting in-depth research and troubleshooting complex performance and architectural challenges that others find elusive.

Jobgether is looking for a Senior Full-Stack Engineer with strong skills in Python and React. This position is based in Israel and focuses on building and supporting modern web applications. Role overview This role centers on both backend and frontend development. The Senior Full-Stack Engineer will work with Python and React to create new features and improve existing systems. Collaboration with other teams is a regular part of the job, ensuring projects move forward smoothly. Key responsibilities Develop and maintain web applications using Python and React Work closely with cross-functional teams to deliver project goals Promote technical quality and consistency across projects Requirements Proven experience as a full-stack engineer Strong knowledge of Python and React Ability to collaborate with diverse teams

Jobgether is looking for a Senior Data Engineer based in Israel. This position centers on building and maintaining data pipelines and architectures that help drive business goals. Role overview The Senior Data Engineer will design, develop, and support data systems. Collaboration with teams across the company is a regular part of the job, with a focus on delivering reliable and secure data solutions. Key responsibilities Create and manage data pipelines and architectures Work with multiple teams to support data quality and availability Help ensure data security in all processes Location This role is based in Israel.