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Company Description Ibsyn Scientific focuses on applying advanced analytical methods to real-world business challenges using expertise in Data Science, Machine Learning, Dynamical Systems, and Operations Research. The company leverages mathematical and statistical modeling techniques, along with efficient algorithms, to extract actionable insights from business and public data across industries such as healthcare, insurance, human resources, and telecommunications. Ibsyn Scientific aims to bridge the gap between cutting-edge research in Computer Science, Statistical Physics, and Physiology and practical business implementation. The organization is committed to building products and delivering services that create meaningful impact and long-term value for customers. Role Description The Freelance Internet of Things (IoT) Developer will work on-site in Kolkata in a contract capacity, designing, developing, and integrating IoT solutions for data-driven business applications. Day-to-day responsibilities include architecting IoT systems, selecting appropriate hardware and communication protocols, implementing device-level and edge computing logic, and connecting devices to cloud or on-premise platforms. The role involves collaborating with data scientists and engineers to ensure IoT data flows reliably into analytics pipelines, optimizing performance, security, and scalability. The IoT Developer will also be responsible for testing, troubleshooting, documenting solutions, and supporting deployment in production environments. Qualifications Candidates should possess strong skills in IoT architecture and development, including microcontroller or single-board computer programming (e.g., Arduino, ESP32, Raspberry Pi) and sensor/actuator integration.Candidates should possess skills in network and communication protocols relevant to IoT, such as MQTT, HTTP/REST, TCP/IP, Bluetooth, Wi-Fi, and cellular or LPWAN technologies.Candidates should possess skills in software development for IoT, including proficiency in languages such as C/C++, Python, or JavaScript, and experience with embedded systems or real-time applications.Candidates should possess skills in cloud and data integration, including connecting IoT devices to platforms like AWS IoT, Azure IoT, or similar services, and handling data ingestion, storage, and basic processing.Candidates should possess skills in IoT security and reliability, including secure communication, device authentication, firmware update processes, and robust error handling.Relevant qualifications include a degree in Computer Science, Engineering, or a related technical field, or equivalent practical experience in IoT projects.Additional beneficial skills include familiarity with data analytics workflows, version control (e.g., Git), hardware debugging tools, and an ability to collaborate effectively in multidisciplinary teams.Demonstrated experience delivering IoT solutions end-to-end, strong problem-solving abilities, and the capacity to work independently on-site within project timelines are highly valued. .
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Most developer ads you'll see are written in English: 18,397 of the 24,795. That doesn't tell you whether the job itself requires you to speak English or work in English daily, so read each posting carefully. Don't assume the language of the ad matches the language of the team.
The employers posting the most developer roles are Link Group (369 jobs), Upvanta (257), jobgether (226), and OfferZen (212). If you're applying to any of these, research their hiring patterns. They move fast and post often, which means they're either scaling hard or replacing people who didn't fit.
In your interview, expect this: 'Walk me through the last time you had to debug something that took you more than an hour. What was it, what did you try first, and what would you do differently?' Hiring managers ask this to see if you think systematically or just try random fixes. Have a real example ready with specifics.