Mechanical Engineer - Piping & Pressure Systems (Contract)

Join Segula Technologies as a Mechanical Engineer specializing in Piping and Pressure Systems. In this role, you will be responsible for designing, analyzing, and optimizing piping systems and pressure vessels, ensuring compliance with industry standards and best practices. You will work on exciting projects that influence various sectors, including energy, infrastructure, and manufacturing.

Toloka AI is hiring a freelance Mechanical Engineer & Python Specialist to support AI training programs. This remote contract role is based in Pretoria, Gauteng, South Africa. The position blends mechanical engineering experience with strong Python programming skills to advance artificial intelligence learning projects. Key responsibilities Create and deliver training materials that integrate mechanical engineering concepts with Python programming for AI applications Work closely with the team to design clear, engaging content for learners Participate in a distributed team focused on ongoing learning and new ideas Requirements Degree or background in mechanical engineering Solid Python programming skills Interest in artificial intelligence and a desire to help others learn Ability to work independently and manage tasks remotely

Please submit your CV in English and include your proficiency level. toloka-ai, in partnership with Mindrift, offers freelance opportunities for optical engineers to contribute to project-based AI work. This remote position is not a permanent role but centers on short-term assignments. The focus is on testing, evaluating, and improving AI systems related to optics and physics. Role overview This freelance role involves designing original optics problems that reflect real research workflows. Assignments require developing computationally intensive challenges that may take days or weeks to solve. Problems span advanced topics in mechanics, electromagnetism, thermodynamics, and quantum mechanics, often inspired by real research or practical applications. Each problem must be clearly documented with accurate, verified solutions. What you will do Design optics problems modeled after real-world research processes. Create complex, computationally demanding challenges. Develop problems requiring advanced reasoning across multiple physics domains. Base problem design on authentic research challenges or practical scenarios. Document each problem and provide precise solutions. Requirements Degree in Physics (theoretical, experimental, or computational) or a related field. At least 2 years of relevant experience in applied work, research, or teaching. Experience with numerical simulation techniques. Ability to design problems that reflect real research processes in physics. Creative problem-solving skills across mechanics, electromagnetism, thermodynamics, and quantum mechanics. Understanding of physics modeling and approximation methods. Proficient written English (C1 level or above). Interest in part-time, temporary projects as a freelance optical engineer. Project commitment During peak project periods, expect to dedicate approximately 10–20 hours per week, though workload may shift depending on project needs. Compensation Earn up to $26 per hour, depending on expertise and pace. Actual pay varies by project scope, complexity, and required skills. Other projects on the platform may offer different rates. How to apply Apply with a CV in English, including your proficiency level. If qualified, join a project. Complete assigned tasks. Receive compensation for your work. Location: Remote , Pretoria, Gauteng, South Africa

Key Responsibilities:Collecting and processing essential documents.Capturing and approving critical data entries.Managing and verifying data accuracy.Generating reports and facilitating effective communication.Required Competencies:Exceptional written and verbal communication skills.Strong interpersonal abilities.Outstanding analytical, time management, and organizational skills.Proficient in conflict resolution.Ability to thrive under pressure, multitask, and prioritize effectively.Meticulous attention to detail and a high level of accuracy.Commitment to maintaining confidentiality.Flexibility in adapting to changing work environments.Strong problem-solving capabilities.Self-motivated, enthusiastic, and results-driven.Capable of working independently with minimal supervision.Demonstrated proficiency in Microsoft Office, particularly Excel.

Join our dynamic team at AECOM, where we are seeking talented engineers to work on innovative dam and reservoir projects across Australia. This role offers the opportunity to contribute to essential infrastructure that supports communities and environmental sustainability.

Key Responsibilities:Drafting Support:Utilize AutoCAD Civil 3D or similar software to produce and refine technical drawings.Develop diagrams, layouts, and site plans essential for project documentation.Documentation Assistance:Aid in the preparation and formatting of technical reports and documents.Maintain precise record-keeping and version control of all project files.Technical Input:Conduct basic engineering calculations and quantity estimates as required.Ensure compliance with relevant municipal standards and client specifications.Project Coordination:Support tracking of project timelines, milestones, and deliverables.Facilitate communication with clients, suppliers, and other stakeholders as necessary.

Please submit your CV in English and indicate your language proficiency. Mindrift connects skilled professionals with project-based AI roles at leading technology companies. This freelance position is remote and based in Pretoria, Gauteng, South Africa. The work is project-based and does not constitute permanent employment. Role overview The Freelance AI Agent Evaluation Engineer will help build a dataset to assess AI coding agents. The main focus is evaluating how these agents perform on practical developer tasks. This involves designing complex assignments and creating fair evaluation criteria within simulated environments that reflect real-life development settings. Main responsibilities Create virtual companies according to a strategic plan, including setting up codebases, infrastructure, and realistic context such as conversations, documentation, and tickets to simulate a development history. Develop and refine tasks based on the evolving state of these virtual companies. Draft prompts, define evaluation criteria, and ensure tasks are solvable and fairly assessed. Design assignments for isolated environments that mimic a developer’s workstation: a Linux machine with development tools (terminal, CLI), MCP servers (repository, task tracker, messenger, documentation), and a real web application codebase. Write tests that accept all valid solutions and reject incorrect ones. Find the right balance between strictness and leniency to ensure good approaches are not penalized and weak solutions do not pass. Work with AI agents on test cases, making sure tests uncover genuine issues, do not miss faulty solutions, and properly validate successful ones. Review code produced by AI agents, analyze reasons for success or failure, and design edge cases and adversarial scenarios. Iterate on your work based on feedback from expert QA reviewers who check your output against quality standards. What this role does not cover Data labeling Prompt engineering Writing code from scratch (the AI agent generates most code; your focus is on guidance and evaluation) Much of the work involves collaborating with AI systems. Creating tasks that challenge advanced models means working closely with these agents.

Please submit your CV in English and indicate your level of English proficiency. Mindrift connects subject matter experts with project-based AI work for major technology companies. As a Freelance Research Physicist - AI Systems Trainer, this position is freelance and project-based, not a permanent role. Role overview Freelance Research Physicists help shape and test the abilities of AI systems in physics. Project tasks vary, but often include: Designing original optics problems modeled after real-world research workflows Developing computationally intensive problems that may require extended solution times Creating scenarios that require advanced reasoning in mechanics, electromagnetism, thermodynamics, and quantum mechanics Grounding problems in actual research challenges or practical situations in optics and physics Documenting problem statements and providing accurate, verified solutions Requirements Degree in Physics (theoretical, experimental, or computational) or a closely related field At least 2 years of relevant experience, which may include research, applied, or teaching roles Experience with numerical simulation techniques Ability to create problems that reflect authentic research processes in physics Creative problem-solving skills across multiple physics specialties Knowledge of modeling and approximation methods in physics Strong written English skills at C1 level or higher Project workflow Apply Pass qualifications Join a project Complete assigned tasks Receive compensation Time commitment During active projects, expect to contribute roughly 10–20 hours per week. Actual hours depend on project needs and may fluctuate outside of live project phases. Compensation Rates go up to $26 per hour, based on expertise and work pace. Compensation may vary by project complexity and requirements. Other projects on the Mindrift platform may offer different pay rates depending on their needs. Location This is a remote, project-based role open to candidates in Pretoria, Gauteng, South Africa.

toloka-ai is looking for a freelance Civil Engineer and Python Specialist to support AI training initiatives. This position is remote, based in Pretoria, Gauteng, South Africa, and allows for flexible work arrangements from any location. Key responsibilities Contribute civil engineering expertise to AI training projects Develop and refine AI training tools using Python Work closely with team members to achieve project objectives and deliverables Role details Freelance contract Remote work Projects blend engineering and programming skills

Please submit your CV in English and specify your level of English proficiency. Toloka AI connects specialists with AI projects from leading technology companies. The team works on testing, evaluating, and improving AI systems. All roles are project-based and do not constitute permanent employment. Role overview This freelance position is designed for optical engineers with strong Python skills who are interested in part-time, project-based assignments. Each project presents new technical challenges and a variety of tasks, such as: Developing computational physics problems modeled on real research workflows Designing problems that require Python programming to solve, often using Numpy, SciPy, or Sympy Ensuring problems are complex enough that manual solutions would take days or weeks Creating scenarios involving advanced reasoning in mechanics, electromagnetism, thermodynamics, and quantum mechanics Basing problems on genuine research challenges or practical physics applications Validating solutions with Python and standard physics simulation libraries Documenting problem statements clearly and providing accurate, verified solutions Requirements Degree in Physics (theoretical, experimental, or computational) or a related field Proficiency in Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, Stata, or similar programming languages is also suitable Minimum of 2 years of professional experience (applied, research, or teaching) Background in numerical simulation techniques Ability to design problems that reflect real-world physics research Creative problem-solving across multiple physics domains Familiarity with physics modeling and approximation methods Strong written English skills (C1 level or higher) Project commitment During active project phases, tasks typically require 10–20 hours per week. Actual workload will vary based on project needs and is not guaranteed outside active phases. Compensation Participants can earn up to $26 per hour, depending on contribution and pace. Compensation varies by project scope, complexity, and expertise required. Other projects on the Toloka AI platform may offer different earning potentials based on their specific requirements. Application process Submit your application Pass the qualification stage Join a project Complete assigned tasks Receive payment Location: Remote , Pretoria, Gauteng, South Africa

Are you an enthusiastic iOS Developer with a flair for innovation? Join DVT, a premier software development and data solutions firm in Africa, as we seek talented individuals to strengthen our vibrant team.As a key member of DVT, you will engage with high-impact projects for prestigious clients both locally and globally. Collaborate with some of the brightest minds in the field while leveraging cutting-edge technologies to redefine mobile app development.Why Choose DVT?Engage in groundbreaking projects alongside industry leadersWork with top-tier developers in a nurturing and innovative environmentBenefit from continuous learning and professional growth opportunitiesContribute to a culture of innovation where your contributions are valuedBe part of a team that champions excellence, creativity, and collaborationThis is your chance to transform mobile development and influence the future of software engineering. If you're ready to advance your career and make a meaningful difference, apply now and be a part of DVT’s journey to excellence.

Join Wabtec Corporation as a Field Service and Technical Advising Specialist, where you will be at the forefront of providing exceptional service and technical guidance to our clients. This role requires a blend of technical expertise and customer service skills to ensure our products operate optimally in the field.

Join Wabtec Corporation as a Field Service and Technical Advising Specialist where you will play a pivotal role in delivering exceptional technical support and service to our clients. In this dynamic position, you will be responsible for troubleshooting, maintaining, and optimizing our advanced systems in the field. We are looking for a proactive individual who thrives in a fast-paced environment and is committed to ensuring customer satisfaction through technical excellence.

Join Wabtec Corporation as a Field Service and Technical Advising Specialist, where you will play a crucial role in providing technical support and advice to our clients. Your expertise will help enhance the efficiency and reliability of our products in the field. This position offers an exciting opportunity to work closely with a diverse range of technologies and solutions that drive the transportation industry forward.

Join Wabtec Corporation as a Field Service and Technical Advising Specialist, where you will play a critical role in providing technical support and guidance to our clients. Your expertise will ensure the seamless operation of our products and services in the field.