Freelance Software Developer (Rust) - Quality Assurance (AI Trainer)

Flexcompute is leading the transformation of engineering simulation with our revolutionary ultra-fast simulation technology. Our flagship products, including the industry-leading Computational Fluid Dynamics (CFD) software Flow360 and electromagnetic simulation software Tidy3D, are reshaping how simulations are conducted across diverse sectors. Founded by visionaries from Stanford and MIT and supported by top-tier venture capital firms, we are a rapidly growing team dedicated to breaking boundaries and challenging the norms of the multi-billion-dollar engineering simulation market. Role Overview We are looking for a Backend Software Engineer to help us design and implement scalable solutions that meet the growing demands of our advanced EM simulation platform. The ideal candidate has expertise in high-performance computing (HPC), infrastructure, web API design, and systems design. Additionally, the candidate will be help us enhance our data management, frontend-backend API unification, and cloud integration. Key Responsibilities Contribute to general software development efforts, such as API unification, simulation data management (e.g., caching, syncing, storage), and scripting improvements. Collaborate with EM and infrastructure teams to implement simulation-specific solutions, including enhancements to back-end/scheduler integrations and Python front-end functionality. Improve our task pipelines through an innovative design for a web API in a multi-physical simulation context. Develop and maintain hybrid cloud compute and storage solutions, integrating on-premise HPC systems with modern cloud platforms. Optimize and manage high-performance computing clusters equipped with high-speed interconnects. Requirements Education: Bachelor’s degree or higher in computer science or computer engineering. Technical Skills: Proficiency in Python, C++, and Java, with experience in distributed computing environments (e.g., MPI). Familiarity with backend API development, documentation, packaging, and deployment. Understanding of HPC computing, system administration, and networking. Experience compiling and optimizing C++ source code. Expertise in cloud computing and storage solutions. Proficiency in Linux operating systems, software deployment (e.g., Ansible), and backend security. Experience with containerization and orchestration tools (e.g., Docker, Kubernetes, Swarm). Innovative Mindset: Ability to learn quickly, adapt to new challenges, and innovate in a fast-paced startup environment. Bonus Skills: Familiarity with electromagnetic physics simulations Knowledge of memory, CPU, and GPU resource optimization. Familiarity with simulation-specific tooling and workflows. Understanding of simulation GUI and scripting interfaces. Example Projects Work with the wider team to merge code into a single repo and then build CI/CD that enforces best-practices, like protecting the main branch Implement docker container usage across the developer workflow, from development to deployment including automated, parameterized image building for on-premise customers Build and deploy a desktop configuration with GUI that connects to a network simulation service and includes licensing controls Track, monitor, and improve the end-to-end latency of simulation runs across all user traffic Manage the sizing and configuration of the high-performance computing cluster comprised of CPUs and GPUs, and track metrics like utilization and performance Collaborate closely with EM team members on the design and optimization of multi-physics simulation workflows, including using frameworks like Slurm and Dask and redesigning our web API Join Us By joining Flexcompute, you’ll be at the heart of a movement set to redefine the engineering simulation industry. You will play a key role in shaping the future, where our innovations in simulation technology pave the way for groundbreaking advancements. We are committed to fostering an innovative and collaborative culture where boundaries of possibility are re-imagined, driven by creativity, expertise, and a shared vision of transforming the technological landscape. Benefits Competitive compensation with equity of a fast-growing startup. Medical, dental, and vision health insurance. 401(k) Contribution. Gym allowance. Friendly, thoughtful, and intelligent coworkers.

MD7, a global leader in digital infrastructure solutions, seeks a strategic-minded Senior Software Engineer to play a pivotal role in our continued expansion. How to know if this is opportunity is the right fit? Do you love building elegant solutions for problems that don’t come with instructions? Are you someone who sees patterns others miss – and then designs something brilliant from them? Do you naturally blend structure and imagination to create systems that scale and last? If you answered yes to these questions, please read on! As our organization continues to evolve and grow, we find ourselves looking for a new team member to assist us in delivering a high-quality experience to every client, every time.  Job summary Lead technical initiatives as a Senior Software Engineer in our innovative, fast-paced environment. You'll design and develop sophisticated .NET web solutions, mentor team members, and drive the integration of AI capabilities across our technology stack. Key characteristics to be successful in this role Lead the design and development of complex web applications using .NET technologies Architect scalable database solutions and optimize performance Design and implement robust web services and API architectures Mentor junior developers and conduct technical code reviews Drive technical decision-making and establish development best practices Collaborate with stakeholders to translate business requirements into technical solutions Lead troubleshooting efforts for complex technical challenges Contribute to system architecture and technology roadmap planning Stay current with emerging technologies and evaluate their potential adoption Required Qualifications Bachelor's degree in Computer Science, Software Engineering, or related field (or equivalent experience) 5+ years of professional software development experience Expert-level proficiency in .NET framework (C#, ASP.NET, .NET Core) Advanced experience with SQL databases, performance tuning, and complex query design Proven experience architecting and implementing web services (REST APIs, microservices) Strong leadership and mentoring capabilities Excellent problem-solving skills and technical judgment Outstanding communication skills with the ability to explain complex technical concepts Experience with software architecture patterns and design principles Preferred Qualifications Experience with AI/ML frameworks and implementation strategies Cloud platform expertise (Azure, AWS) with deployment and scaling experience Full-stack development experience, including modern frontend technologies Experience with DevOps practices and CI/CD pipelines Agile/Scrum methodology experience in leadership capacity Licenses or Certifications None MD7 Core Values Our Vision and Core Values are both foundational and aspirational at the same time.  We never quit striving to improve. We’re always looking to recruit exceptional talent that share in these values as well. Respect for the Individual Balanced Life Giving Back Continuous Improvement Extreme Service Integrity Additional information *This position reports to our Allen, Texas headquarters and requires in-office presence. Pay Range: TBD Employment Type: Full Time We want to be able to continuously innovate to empower success. That’s why, in addition to exciting career opportunities throughout the world, we also provide the best training in the industry. Disclaimer The above statements are intended to describe the general nature and level of work being performed by people assigned to this classification. They are not to be construed as an exhaustive list of all responsibilities, duties, and skills required of personnel so classified. All personnel may be required to perform duties outside of their normal responsibilities from time to time, as needed. MD7 is an Equal Opportunity Employer.  If you need assistance or an accommodation due to a disability, please contact us at recruiting@MD7.com. 

This opportunity is only for candidates currently residing in the specified country. Your location may affect eligibility and rates. At Mindrift, innovation meets opportunity. We believe in using the power of collective intelligence to ethically shape the future of AI. What we do The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe. About the Role GenAI models are improving very quickly, and one of our goals is to make them capable of addressing specialized questions and achieving complex reasoning skills. If you join the platform as an AI Tutor in Coding, you’ll have the opportunity to collaborate on these projects. Although every project is unique, you might typically: Analyze and understand existing code in Python or C/C++ Migrate logic to idiomatic, safe Rust while preserving functionality Adapt or port the test suite and ensure behavioral equivalence Document migration steps and technical decisions How to get started Simply apply to this post, qualify, and get the chance to contribute to projects aligned with your skills, on your own schedule. From creating training prompts to refining model responses, you’ll help shape the future of AI while ensuring technology benefits everyone. Requirements You have a Bachelor's or Master’s degree in Software Development, Computer Science, or other related fields.  You have at least 3 years of professional experience with Python, 1+ year of Rust (or fast learning capability). Your level of English is advanced (C1) or above. Experience with PyO3/maturin for Python-Rust interoperability. Knowledge of Docker, Kubernetes, and CI/CD for hybrid Python-Rust apps. You are ready to learn new methods, able to switch between tasks and topics quickly and sometimes work with challenging, complex guidelines. Our freelance role is fully remote so, you just need a laptop, internet connection, time available and enthusiasm to take on a challenge. Benefits Why this freelance opportunity might be a great fit for you? Get paid for your expertise, with rates that can go up to $50/hour depending on your skills, experience, and project needs. Take part in a part-time, remote, freelance project that fits around your primary professional or academic commitments. Work on advanced AI projects and gain valuable experience that enhances your portfolio. Influence how future AI models understand and communicate in your field of expertise.

Responsibilities: Design, develop, test, release, and maintain new and existing mobile applications built with React Native: Design, develop, test, release, and maintain new and existing APIs built Collaborate with product team to understand the requirements Present low-level design or approach for the solution before the development Write reusable, reliable, scalable and well-documented code Build dynamic, low latency, responsive and real-time user interfaces Write readable, simple and deterministic unit tests Collaborate with cross-functional teams for integrations Implement and maintain automated testing and continuous integration/deployment processes Debug and troubleshoot issues, and optimize application performance Work with Agile teams and adhere to the ways of working Mentor junior developers in the team Requirements A Bachelor's Degree is required, preferred degree in Computer Science, Engineering, or a related field 10+ years of experience developing React Native, React web 6+ years of experience developing with leading front-end frameworks such as Angular/React/Vue 6+ years of experience delivering scalable and resilient applications at large enterprise scale Strong knowledge with redux and redux-persist Strong knowledge with Jest framework for unit testing Experience in data handling from content management system Experience with integrating third-party libraries, SDKs and APIs Experience with analytics and logging Experience with real-time App monitoring and crashlytics Experience with Git Excellent analytical skills with a good problem-solving attitude Knowledgeable with CDNs Good understanding of CI/CD processes

JASCI is a leading provider of Warehouse Management software solutions for the logistics market, serving some of the largest companies in the world. We are currently seeking a qualified Java Developer to join our dynamic team. The successful candidate will play a pivotal role in developing and maintaining high-quality software applications. Key Responsibilities: Design, develop, and maintain Java-based applications that meet customer requirements. Collaborate with cross-functional teams to gather and analyze requirements, ensuring alignment with business objectives. Write clean, efficient, and well-documented code while following best practices and coding standards. Perform unit testing and debugging to ensure the software functions as intended. Participate in code reviews and provide constructive feedback to team members. Stay updated with the latest industry trends and technologies to enhance development practices. Requirements Qualifications: Bachelor's degree in Computer Science or a related field. 2+ years of experience in Java development, including knowledge of Java Frameworks such as Spring or Hibernate. Proficiency in relational databases and SQL, with experience using Oracle being a plus. Familiarity with web technologies such as HTML, CSS, and JavaScript. Strong analytical and problem-solving skills with attention to detail. Excellent communication skills and the ability to work collaboratively in a team environment. WMS experience a plus JASCI offers an exceptional work environment and opportunities for professional growth. We invite qualified candidates to apply and join our innovative team. Benefits Great Benefits package and competitive salary

About CoinList CoinList is a leading crypto financial platform supporting the full lifecycle of crypto investment. We offer a comprehensive suite of services, including token sales, trading, lending, staking, and access to DeFi opportunities. CoinList has helped raise over $1.1 billion for groundbreaking projects, establishing itself as the go-to platform for innovative blockchain companies. Our platform is trusted by validators, miners, founders, crypto funds, and a broad array of crypto enthusiasts globally. The Opportunity We’re looking for a Senior Software Engineer (Full Stack, Backend-leaning) to join our Core Team. You’ll play a key role in building and scaling the core financial infrastructure that powers CoinList’s money movement, wallet, and custody solutions, while also owning and improving our web application experience. This is a high-impact role where you’ll ship production systems, shape product direction, and help set technical standards for the team. This role is ideal for a full stack engineer (backend-leaning) who thrives in product-focused environments, cares deeply about UX and frontend polish, and is excited to own both backend infrastructure and web product experiences in a fast-paced fintech startup. What You’ll Do: Design, build, and scale robust financial software systems and backend services that power money movement, custody, and payment flows. Develop and maintain web frontends (React, LiveView) with a focus on UX, collaborating closely with designers to deliver polished, user-friendly products. Architect and optimize wallet and custody solutions for a variety of cryptocurrencies, ensuring security, reliability, and scalability. Own projects end-to-end: From concept and design through implementation, testing, deployment, and monitoring. Collaborate cross-functionally with product, compliance, and other engineering teams to deliver secure and delightful financial products. Participate in code reviews, share knowledge, and help upskill junior engineers. Identify and address performance bottlenecks, reliability gaps, and opportunities for automation. Influence product and technical direction, working closely with leadership and crypto founders. Requirements 5+ years of professional engineering experience shipping high-quality code in production environments Strong coding fundamentals Proven experience scaling financial systems (fintech, payments, trading, or crypto/DeFi platforms). Security-first mindset and deep understanding of best practices in financial software development. Experience with, or open to learning and working with, Elixir and LiveView (backend and frontend). Demonstrated experience building and maintaining production web frontends (React, LiveView, or similar). Track record of product ownership, attention to detail, and working collaboratively with designers. Bonus Skills: Experience with distributed systems or microservices architecture. Prior Elixir experience is a plus but not required-willingness and ability to learn is key. Familiarity with blockchain protocols, crypto custody, or staking systems. Experience integrating with payment rails, ledgers, or compliance systems. Contributions to open-source projects or crypto communities. Backend engineering fundamentals with experience in modern languages (Elixir, Ruby, Go, TypeScript, Python, etc.). Tech stack:  Elixir (primary), LiveView (frontend), Ruby. Most new development is in Elixir and LiveView. Legacy systems in Ruby on Rails and React. Benefits $128,000 – $179,000 USD base + significant equity (depending on experience/location)