Freelance AI Trainer - Physics Specialist with Python Expertise

We invite you to submit your CV in English and specify your level of English proficiency.At Mindrift, we bridge the gap between specialized talent and exciting, project-based AI roles with leading technology firms. Our focus is on testing, evaluating, and enhancing AI systems. Note: Participation is on a project basis, not permanent employment.What You Will …

Please submit your CV in English and indicate your level of English proficiency.Mindrift is a dynamic platform that connects talented specialists with project-based AI opportunities for top-tier tech companies, focusing on the testing, evaluation, and enhancement of AI systems. Note that participation is project-based and does not lead to permanent employment.Opportunity Overview:Each project presents unique challenges, and contributors may:Design original computational physics problems that replicate real-world physics research workflows;Create programming challenges that require Python solutions (utilizing frameworks such as Numpy, SciPy, Sympy);Ensure that problems are computationally intensive and cannot be resolved manually within practical time limits (days/weeks);Develop scenarios that necessitate complex reasoning in mechanics, electromagnetism, thermodynamics, and quantum mechanics;Base problems on real research dilemmas or applicable challenges from physics practice;Verify solutions using Python in conjunction with standard physics simulation libraries;Clearly document problem statements and provide verified correct answers.Desired Qualifications:This opportunity suits quantum researchers with Python experience who are interested in part-time, non-permanent projects. Ideal candidates will possess:A degree in Physics (Theoretical, Experimental, or Computational) or a related field;Proficiency in Python for numerical validation; familiarity with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or other domain-specific libraries is also valuable;At least 2 years of professional experience, whether in applied work, research, or teaching;Experience with numerical simulation techniques;The capacity to design problems reflective of genuine physics research workflows;Creative problem-solving abilities across various physics domains;Familiarity with modeling and approximation techniques in physics;Strong command of written English (C1 level or higher).Application Process:Apply → Pass the qualifications → Join a project → Complete assigned tasks → Receive payment.Project Time Commitment:Tasks are estimated to require approximately 10–20 hours per week during active phases, based on specific project demands. This is an estimate and not a guaranteed workload for the duration of the project.Compensation:Contributors can earn up to $45 per hour, depending on their skill level and contribution pace. Compensation varies across projects based on their scope, complexity, and required expertise. Note that other projects on the platform may offer different earning levels based on specific requirements.

Overview: Join Lovable as an Analytics Engineer to lead the design and implementation of our data foundation, driving informed marketing strategies. You will create event tracking systems, develop data models, and ensure the integrity of our data for effective analysis of attribution, lifetime value (LTV), and channel performance.Why Choose Lovable?At Lovable, we empower individuals and teams to create software using simple, plain English. Whether you are a solopreneur or part of a Fortune 100 company, our platform enables millions worldwide to turn their ideas into reality swiftly. We are pioneering a transformative approach to software development, providing you with a unique opportunity to reshape the digital landscape. Over 2 million users across 200+ countries already trust Lovable to launch businesses and streamline operations, and we’re just getting started.As a compact yet highly skilled team based in Stockholm, we prioritize extreme ownership, rapid execution, and collaborative spirit. We are on the lookout for passionate individuals who are eager to make an impact and contribute to our journey.Key QualificationsProficiency in marketing data concepts, including UTM structures and attribution methodologies.Strong command of SQL, dbt, SQLMesh, or similar data modeling tools, including capabilities in testing, macros, and documentation.Solid understanding of dimensional modeling, data contracts, and metrics layers.Hands-on experience with data transformation tools such as SQLMesh and dbt.Familiarity with event collection systems like RudderStack, Segment, Snowplow, and GA4.Experience with cloud warehousing solutions (Snowflake, BigQuery, Redshift, Databricks) and BI tools (Looker, Tableau, Power BI, Hex, Metabase).Strong business acumen with the ability to translate complex domain logic into scalable data models.Your ResponsibilitiesEstablish and manage the event taxonomy for marketing interactions, including UTMs, referrals, conversions, and campaign engagements.Collaborate with product engineering teams to implement and validate tracking across web, app, and lifecycle channels.Develop and maintain dimensional models (SQLMesh) for analyzing attribution, channel performance, and customer journey.Create foundational tables for tracking attribution windows, touchpoint sequences, cohort definitions, and channel performance metrics.

Toloka Annotators is looking for a Freelance AI Trainer - Data Annotation Specialist to help build better AI models by producing well-labeled datasets. This remote position is open to candidates based in Sweden. Key responsibilities Label and annotate various types of data for AI training and evaluation tasks Support the accuracy and performance of machine learning models through careful data preparation Work remotely with an international team of collaborators What we value Keen attention to detail when handling data Interest in AI technologies and maintaining data quality Ability to work independently from a home office Residence in Sweden Work arrangement This freelance role offers the flexibility to work from anywhere within Sweden. Team members connect and collaborate online with colleagues worldwide.

Role Overview AFRY is hiring a Senior Process Engineer with a focus on Life Sciences at the Malmö office. This position centers on designing, optimizing, and implementing processes that align with regulatory standards and support efficient operations. What You Will Do Design and refine process solutions for projects in the Life Sciences sector Implement process improvements to support compliance and efficiency Work closely with teams to ensure solutions meet regulatory requirements Impact This role supports the advancement of healthcare solutions by improving processes that matter in the Life Sciences field.

Join our dynamic team as an AI Data Specialist and contribute to the enhancement of AI-generated content in Swedish. Job Type: FreelanceLocation: Work from homeWork Schedule: Part-time - 10+ hours per week. Enjoy the flexibility to work at your convenience.Start Date: Immediate availabilityDuration: To be confirmedRate: Compensation varies based on location. Contribute to the Future of AIAre you a student, recent graduate, stay-at-home parent, gig worker, or professional seeking flexible remote opportunities? If you're passionate about shaping the evolution and safety of contemporary AI models, we want to hear from you! Your ResponsibilitiesIn this role, you will perform a variety of data-centric tasks, including:Data collection, evaluation, and annotation.Conducting pairwise comparisons.Executing counting tasks.Tagging and labeling objects across various content types (audio, video, images, or collected data). QualificationsNative-level fluency in SwedishProficient in English (Fluent or advanced proficiency, levels B2–C2)Experience in AI & Data (Preferred): Familiarity with machine learning tasks, data collection and preprocessing, quality assurance, and data annotation. What We ProvideFlexible working hoursPotential to earn additional incomePrompt paymentIdeal for students, part-timers, or stay-at-home parents

We encourage you to submit your CV in English and specify your English proficiency level.At Mindrift, we connect talented specialists with project-based artificial intelligence opportunities for top-tier technology companies, concentrating on the testing, evaluation, and enhancement of AI systems. Please note that participation is project-based and does not constitute permanent employment.Opportunity OverviewEach project presents its own unique challenges, and contributors may be tasked with:Creating rigorous Computer Science problems that reflect industry practices;Assessing AI solutions for accuracy, underlying assumptions, and constraints;Validating calculations or simulations using Python (including libraries such as NumPy, Pandas, and SciPy);Enhancing AI reasoning to conform to industry-standard logic;Implementing structured scoring criteria for complex, multi-step problems;Collaborating with a global network of PhD professionals to uphold the highest standards of scientific integrity.Desired QualificationsThis role is ideal for Computer Science experts with Python experience who are open to part-time, non-permanent projects. Preferred qualifications include:A degree in Computer Science or a related field.Proficiency in Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, and other domain-specific libraries is also acceptable.At least 2 years of relevant professional experience, including applied research or teaching.Strong written English skills (C1 level or higher).Professional certifications (e.g., CMME, SAS Certifications, CAP) and experience with international or applied projects are advantageous.Application ProcessApply → Complete qualifications → Join a project → Execute tasks → Receive compensationProject CommitmentFor this role, tasks are expected to require approximately 10–20 hours per week during active phases, depending on project specifics. This is an estimate and not a guaranteed workload.Compensation DetailsContributors can earn up to $50 per hour, based on their level of expertise and contribution pace. Compensation varies across projects based on scope, complexity, and the level of required expertise. Please be aware that other projects on the platform may offer different compensation rates based on their specific needs.

Join Toloka AI as a Freelance Agent Evaluation Engineer, where you will play a crucial role in enhancing our AI models through your expertise. This position is fully remote, allowing you to work from anywhere in Sweden. You will evaluate and provide feedback on agent performance, ensuring our systems deliver optimal results.

Role overview Sobi is hiring a Data Analyst based in Stockholm. The main focus is to translate data into actionable insights that help guide business decisions. This position involves regular collaboration with team members across various departments. By working together with colleagues from different areas, the analyst helps improve how data informs daily operations. The goal is to make information more accessible and useful throughout the company. What you will do Analyze company data to identify trends and patterns Present findings in a clear, practical way for business use Work closely with teams across departments to support data-driven decisions Requirements Experience working with data analysis Strong communication skills for sharing insights Ability to collaborate with colleagues from different functions

Mindrift offers project-based remote roles for specialists in chemistry and Python, supporting the development and evaluation of AI systems for technology companies. This freelance position is open to candidates based in Sweden and is not a permanent employment opportunity. Role overview As a Freelance AI Trainer, the main focus is to create and validate computational chemistry problems that mirror real-world research workflows. Tasks include designing original scenarios that require advanced reasoning in physical chemistry, quantum chemistry, and molecular modeling. Problems should demand Python programming for resolution, often using libraries such as numpy, scipy, or other relevant chemical packages. Each problem must be computationally intensive, with solutions that cannot be completed manually in a reasonable timeframe. All problem statements and answers should be clearly documented and verified using established computational chemistry methods in Python. Requirements Degree in Chemistry or a related field Proficiency in Python for numerical validation (experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or domain-specific libraries is also acceptable) At least 2 years of professional experience in applied, research, or teaching roles Experience with numerical methods in chemistry Strong understanding of computational chemistry concepts and techniques Excellent written English skills at C1+ level Project commitment During active project phases, expect to contribute approximately 10–20 hours per week. Actual workload may vary depending on project needs. Compensation Contributors can earn up to $45 per hour, depending on expertise and the pace of contributions. Compensation may differ between projects based on complexity, scope, and required skills. How to apply Please submit your CV in English and include your English proficiency level. The process involves applying, passing qualifications, joining a project, completing assigned tasks, and receiving compensation.

About UsAt Xenon7, we are where elite tech talent meets exceptional opportunities! We collaborate with leading enterprises and innovative startups to tackle exciting, cutting-edge projects using the latest technologies across various IT domains, including Data, Web, Infrastructure, AI, and more. Our expertise in IT solutions development and on-demand resources empowers us to partner with clients on transformative initiatives, driving innovation and significant business growth. Whether empowering global organizations or collaborating with pioneering startups, we are dedicated to delivering advanced and impactful solutions that address today's most complex challenges.Join us in building a community of top-tier experts! We are currently inviting exceptional AI & ML Professionals to solve real-world problems and help shape the future of intelligent systems.About the RoleWe are searching for a talented Node.js + Python Engineer with extensive experience in building backend services, APIs, automation, and data-driven features. You will collaborate with a distributed engineering team on a modern platform utilizing Node.js, Python, PostgreSQL, and cloud-native tools.Key ResponsibilitiesDevelop and maintain backend services using Node.js and Python.Design and optimize REST APIs, microservices, and backend workflows.Utilize PostgreSQL for schema design, queries, and performance tuning.Create automation scripts, integrations, and backend utilities.Collaborate with product, DevOps, and frontend teams to deliver features end-to-end.Produce clean, testable, and maintainable code following industry best practices.Diagnose production issues and enhance system reliability.Engage in code reviews, architecture discussions, and technical planning.Required Skills3–7+ years of backend engineering experienceProficient in Node.js (using frameworks like Express, Fastify, NestJS, etc.)Strong background in Python (including automation, APIs, scripts, services)Proven SQL skills and experience with PostgreSQL.Experience in microservices, API design, and distributed systems.Familiarity with Docker, CI/CD pipelines, and cloud environments (AWS/Azure/GCP).Solid understanding of authentication, authorization, and security best practices.Excellent debugging, problem-solving, and communication skills.Nice to HaveExperience with message queues (SQS, RabbitMQ, Kafka).Knowledge of Redis or caching strategies.Familiarity with serverless architectures (AWS Lambda).Experience with monitoring tools (CloudWatch, Prometheus).

Toloka AI is looking for a Freelance Machine Learning Engineer to join on a contract basis. This remote role is open to candidates based in Sweden and centers on contributing to projects in machine learning and data analytics. Key responsibilities Work closely with teams to advance machine learning initiatives Use data analytics to address practical problems Support the development and improvement of AI solutions Work arrangement This freelance position is fully remote, but applicants must reside in Sweden.

Jobgether is looking for a Senior Data Engineer based in Sweden. This position centers on developing and maintaining the systems that power data-driven decisions across the company. Role overview The Senior Data Engineer will design, build, and support scalable data pipelines and databases. The work directly impacts how data is collected, processed, and made accessible for analytics and reporting. Key responsibilities Design and implement data pipelines that handle large volumes of information efficiently Build and maintain databases to support analytics needs Work closely with team members to ensure data solutions meet business requirements Collaboration This role involves working with others across the organization to improve data infrastructure and analytics capabilities. A collaborative mindset and strong communication skills are important for success.

Please submit your CV in English and specify your English proficiency level. Toloka AI offers project-based freelance roles for specialists in artificial intelligence. The company focuses on testing, evaluating, and improving AI systems for major technology clients. This particular position is freelance and project-based, not a permanent employment offer. Role overview The Freelance Optical Engineer - AI Trainer works on projects that involve designing optical and physics problems for AI training. Assignments often include: Developing original optical problems that reflect real-world research workflows in physics Creating computationally intensive challenges unsuitable for manual solving Formulating problems requiring advanced reasoning in mechanics, electromagnetism, thermodynamics, and quantum mechanics Referencing real research challenges or practical applications in optics and physics Writing clear problem statements and supplying accurate, validated solutions Requirements Degree in Physics (theoretical, experimental, or computational) or a closely related field Minimum of 2 years of professional experience in applied, research, or teaching roles Strong background in numerical simulation methods Ability to design problems that mirror real research workflows in physics Creative approach to problem design across multiple physics domains Familiarity with physics modeling and approximation techniques Excellent written English skills (C1 level or above) Application process Apply Pass qualification(s) Join a project Complete assigned tasks Receive payment Project commitment During active project phases, contributors usually dedicate 10–20 hours per week. Actual workload depends on project needs and is not guaranteed outside of active periods. Compensation Contributors may earn up to $45 per hour, depending on experience and project pace. Rates vary by project scope, complexity, and required expertise. Other projects on the platform may offer different compensation based on their specific requirements.

jobgether is hiring a Senior Full-Stack Engineer based in Sweden. This position focuses on building and improving software using Python and React. The role centers on developing solutions that enhance how users interact with our products. What you will do Work on both backend and frontend projects using Python and React Collaborate with engineers and colleagues from other teams to deliver software Tackle complex technical challenges and contribute to key projects Requirements Professional experience with Python and React Ability to solve complex problems and deliver high-quality solutions Comfort working with cross-functional teams

Join Sopra Steria as a Data Engineer in Gothenburg, where you will play a crucial role in managing and analyzing data to drive insights and support decision-making processes. You will collaborate with cross-functional teams and utilize cutting-edge technologies to develop data solutions that enhance our service offerings.

Role overview Mindrift seeks a Freelance DevOps Engineer to support automation systems for the Tendem project. This part-time contract focuses on building and maintaining infrastructure that enables automation workflows in a hybrid AI and human environment. The internal title for this position is AI Pilot. Work is fully remote, with the role based in Sweden. What you will do Design and maintain infrastructure for automation pipelines Collaborate with Tendem Agents to improve reliability and performance Support smooth operation of automation workflows in high-load scenarios Requirements Experience with cloud infrastructure Comfort with system deployment and managing automation systems under heavy load Interest in part-time, remote freelance work

airapps is looking for a Data Engineer in Stockholm to help turn raw data into reliable insights. This role centers on building and maintaining data pipelines that support the company’s decision-making and operations. What you will do Design and implement data pipelines to move and process information efficiently Maintain existing data systems to ensure smooth operation Monitor and uphold data integrity and quality across platforms Role overview This position suits someone who enjoys working with data and wants to grow their skills in a collaborative setting. The work involves both hands-on engineering and attention to data accuracy. Location This Data Engineer role is based in Stockholm.

Cerve develops the data infrastructure that supports the €10 trillion food and beverage supply chain. The company’s platform provides supply chain intelligence, helping the industry improve margins, cut waste, and address food security and foodborne illness challenges at scale. Role overview The Data Engineer at Cerve focuses on designing, building, and refining data products that drive the platform’s capabilities. This position collaborates closely with Engineering and Product teams to deliver scalable, efficient solutions, including data processing pipelines and retrieval systems for agent-facing features. What you will do Data ingestion and transformation: Build and maintain pipelines to convert unstructured real-world data into structured, usable formats. Architecture decisions: Make hands-on architectural choices across platforms such as Cloud Spanner, GCS, and Cloud Run, balancing cost, performance, and scalability. Agent and LLM infrastructure: Develop retrieval systems and data layers that support agent-facing functionality. Collaboration: Work with product and engineering teams to translate customer needs into deployed features, focusing on impactful, efficient solutions. Code quality: Write clean, well-tested code and help raise quality standards as the team grows. Observability and reliability: Set up comprehensive monitoring for data pipelines and systems to ensure reliability and data quality. Who you are Entrepreneurial spirit: Comfortable working in a startup environment, bringing initiative and follow-through to projects. Systematic thinker: Able to see the big picture while managing key details to deliver effective solutions. Location This position is based in Sweden.

TL;DR - We are seeking talented Data Platform Engineers to architect, construct, and sustain our comprehensive declarative data platform, facilitating seamless data ingestion, transformation, and utilization across Lovable. Your passion for empowering teams will drive you to ensure our data systems are scalable, reliable, secure, and user-friendly.Why Join Lovable?At Lovable, we democratize software development, enabling anyone – from solo entrepreneurs to Fortune 100 firms – to transform their ideas into tangible products swiftly. We are leading a groundbreaking evolution in software creation, offering you a unique chance to reshape the digital landscape. With over 2 million users across 200+ countries, Lovable empowers individuals to launch businesses, automate tasks, and manifest their visions. And this is just the beginning.Our tight-knit, highly skilled team is dedicated to building a pioneering company from our base in Stockholm. We prioritize extreme ownership, rapid execution, and collaborative spirit. We seek individuals who are genuinely passionate, thrive on fast-paced delivery, and are eager to make a significant impact.Your Role:Design and maintain our core data infrastructure, including data lakes, warehouses, orchestration, observability, and governance.Collaborate with various platform and domain teams to architect data pipelines and implement declarative configurations for ingestion and transformation.Ensure that data quality, lineage, and security standards are integrated into all workflows.Work alongside Analytics Engineers to establish modeling conventions and enforce schema governance.Implement CI/CD pipelines for data systems while assisting with cost optimization and performance enhancements.Define best practices for our data platform and support ongoing initiatives.