OPC UA SCADA expert

@vishal1145

Your SCADA integration will fail if you don't isolate the OPC UA client from the production OT network. I've seen solar plants go offline because someone exposed PLC endpoints directly to cloud APIs without proper certificate validation or firewall rules. Before architecting the integration, I need clarity on two things: What's your current SCADA vendor (Siemens, Schneider, ABB?) and are the PLCs already configured for OPC UA server mode, or are we bridging from Modbus TCP? Second, what's your acceptable data latency - are we talking 1-second polling for real-time dashboards or 5-minute batches for analytics? Here's the architectural approach: - OPC UA CLIENT LAYER: Deploy a Node.js gateway using node-opcua library with X.509 certificate authentication to establish read-only sessions with your SCADA servers, preventing any write operations that could disrupt plant operations. - TAG MAPPING + TELEMETRY: Build a PostgreSQL schema that mirrors your inverter/string combiner hierarchy, then map OPC UA NodeIDs to normalized telemetry tags (voltage, current, irradiance) with timestamp validation to catch stale data. - GOOGLE CLOUD INTEGRATION: Use Cloud Functions to ingest OPC UA data via REST API, then store in Supabase with row-level security policies to ensure multi-tenant isolation for different solar sites. - CYBERSECURITY LAYER: Implement VPN tunneling between plant edge devices and GCP, use certificate pinning for OPC UA sessions, and set up audit logging to track every data access event for compliance. - PHP/ANGULAR DASHBOARD: Expose real-time telemetry via REST API with Redis caching to handle 1000+ concurrent dashboard users without hammering the SCADA network. I've integrated OPC UA for 4 industrial clients including a 50MW solar farm where we reduced data polling overhead by 70% using subscription-based updates instead of continuous polling. I don't take on projects where the OT network architecture is unclear. Let's schedule a 20-minute technical call to review your SCADA topology and discuss failover scenarios before committing to a build.

@ixorawebmob

Hello, I’ve gone through your project details and this is something I can definitely help you with. I have over 10 years of experience in mobile and web app development, specifically focusing on secure integrations, where I have worked with cloud applications and API development extensively. My experience includes handling complex data acquisition systems like SCADA, especially in the solar energy sector. With a solid understanding of OPC UA architecture, PLC, Modbus TCP, and tag mapping, I can ensure a seamless integration of the SCADA systems with your Solar AI Studio platform. My background in cybersecurity further strengthens my ability to manage safe integrations. Here is my portfolio: https://www.freelancer.in/u/ixorawebmob I’m interested in your project and would love to understand more details to ensure the best approach. Could you clarify: Can you provide more details on your existing SCADA systems and the specific data points you are looking to integrate? Let’s discuss over chat! Regards, Arpit Jaiswal

@sharmin283

Having developed various digital solutions throughout my career, I am confident that my skillset makes me an ideal match for your OPC UA/SCADA Integration expert needs. I have expanse experience with JavaScript which includes in-depth knowledge of Node.js. Moreover, my proficiency in using PHP and familiarity with cloud APIs, like Supabase and PostgreSQL, places me well to handle your required secure, read-only OPC UA integration. Over the years, I have successfully partnered on similar projects that involved SCADA integration across different industrial systems including solar PV plants. My understanding of PLC, Modbus TCP, tags, telemetry and data acquisition along with the ability to advise on tag mapping, polling frequency and data quality will bring immense value to your Solar AI Studio platform. Lastly, security is paramount for an application like yours. My knowledge regarding cybersecurity measures such as VPNs and certificates, coupled with experience in OT network safety helps in ensuring data integrity and system functionality. Through effective communication and timely execution,I aim to contribute towards a successful project completion.

@Abhishek2117

Hi, I’m Abhishek Rathore, a senior full-stack engineer. You need a secure, read-only OPC UA integration between solar SCADA systems and your cloud digital twin, with correct tag mapping, polling, and OT-safe architecture—I can design and implement that end-to-end. ? Approach I’ll build a read-only OPC UA client layer using Node.js (node-opcua) with a Python fallback for data validation. Data will stream via subscriptions (not polling) into a PostgreSQL/Supabase backend, with a secure gateway deployed inside the OT network and VPN-based outbound sync. ✅ Core Features - OPC UA client setup with certificate-based trust - Tag discovery, normalization, and mapping strategy - Subscription-based telemetry ingestion with rate tuning - Modbus/PLC tag alignment and namespace structuring - Data validation, buffering, and retry logic - Secure OT–IT bridge with minimal attack surface ☁️ Reliability / Performance Edge gateway queues data locally during outages. Deadband and sampling intervals reduce load. Strict read-only permissions and certificate rotation ensure OT safety. ? Deliverables - Working OPC UA integration service - Tag mapping schema and documentation - Deployment scripts and security config - Test logs with data accuracy validation ? Why Me Built industrial data pipelines and real-time dashboards, including SCADA-style ingestion systems for energy monitoring. Do your SCADA systems expose standard OPC UA namespaces, or are custom nodes involved?

@AZTURK1

Hi there, I understand you need a secure, read-only OPC UA integration between existing solar plant SCADA systems and a cloud-based solar digital twin; I have hands-on OPC UA client/server experience and have integrated PV SCADA telemetry into cloud APIs using Node.js and Python. - Deliverable 1: implement a read-only OPC UA client gateway (Node.js or Python) that performs tag discovery, mapping and secure certificate-based connection to on-site OPC UA servers. - Deliverable 2: build ingestion to Supabase/PostgreSQL with configurable polling vs subscription, data validation, and retention policies for digital twin consumption. - Risk/control: staged deployment with backup checkpoint, certificate rollout and post-deploy validation to ensure zero write operations and minimal downtime. Skills: ✅ OPC UA ✅ SCADA / Modbus TCP / PLC tag mapping ✅ Node.js / Python integration ✅ Supabase / PostgreSQL ingestion & cloud APIs ✅ VPN / certificates / OT network cybersecurity Certificates: ✅ Microsoft® Certified: MCSA | MCSE | MCT ✅ cPanel® & WHM Certified CWSA-2 I am available to start immediately; Is this already running on a live production server, or do you want a staged rollout first? Best regards,

@ashinnd84

Hello there, we are a team of Senior Full Stack Web Developers and we can build your excellent scalable application for you. Please, send me a message to discuss the work and finish in no time. Thanks Ashish Kumar.

@mayankinnovative

Hi, As per my understanding: You need an OPC UA/SCADA expert to enable a secure, read-only data bridge between solar plant SCADA systems and your cloud-based digital twin platform. The goal is reliable telemetry ingestion (tags, PLC/Modbus data) with proper mapping, optimized polling/subscription, and strong cybersecurity using certificates/VPN—without impacting plant operations. Implementation approach: I would design an OPC UA client layer (Node.js or Python) that connects securely to SCADA OPC UA servers in read-only mode. Data will be normalized via structured tag mapping (inverters, strings, weather, meters) and streamed using subscriptions where possible, fallback to polling where required. A lightweight edge connector (deployed on-site or VM) will push cleaned data to your cloud (Supabase/PostgreSQL APIs). Security will include certificate-based auth, VPN tunneling, and strict network isolation. Data validation, buffering, and retry logic will ensure high availability and quality for your digital twin. A few quick questions: Which SCADA systems/OPC UA servers are currently in use? Do you prefer edge deployment or direct cloud connectivity? Expected tag volume and data frequency per plant? Any existing data schema for the digital twin?

@UzeeTech

Having reviewed your project, I am confident in my abilities to fulfill your requirements as an OPC UA / SCADA Integration Expert for your Solar AI Studio platform. With over 7+ years of experience as a Full-Stack Developer, I have accumulated ample expertise in building and advising on secure industrial systems, strictly adhering to cybersecurity protocols like VPNs, certificates, and OT network safety. My proficiency with OPC UA server/client architecture and SCADA integration bolsters my capacity to bridge existing solar plant SCADA systems seamlessly with your digital twin application. My familiarity with languages like Node.js and Python aligns perfectly with your preferences while my cloud API expertise, particularly Supabase/PostgreSQL, adds immense value by facilitating robust, scalable solutions uniquely tailored for your project. But what truly distinguishes me from my peers is my reliability and commitment to transparent communication. From daily updates on progress and realistic timelines to delivering clean code that is well-documented and testable, I ensure consistent accountability throughout the project lifecycle. Opting for my services would not only guarantee a successful completion of this project but also a valuable partnership for any of your future needs as a client-focused freelancer. Together we can build an exceptional, secure platform that empowers you all along the way. Let's discuss your project further so we can lay the foundation for success.

@Shrutibimpl

Hello There, You want a secure, read only data bridge between your solar SCADA systems and the Solar AI Studio cloud. 1) Are the existing SCADA servers already OPC UA compliant or do we need to implement an OPC UA gateway for older Modbus based PLCs? 2) Will we be deploying an edge gateway for certificate management and outbound only traffic to bypass inbound firewall risks? 3) How many unique tags per inverter or weather station are we planning to synchronize for the digital twin model? We will unlock the power of your solar plant data by creating a safe, one way street that feeds your digital twin without ever putting your onsite operations at risk. This means your team can monitor performance and run AI simulations from anywhere in the world while your physical controllers remain shielded from the public internet. You get a reliable stream of high quality telemetry that allows you to predict maintenance needs and maximize energy yield with total peace of mind regarding cybersecurity. I will design the integration using a Python based OPC UA client running on an edge device to poll tags from the plant SCADA or directly from Modbus TCP PLCs. I will use certificate based authentication and encrypted tunnels to ensure OT network safety, focusing on a subscription model to minimize bandwidth while maintaining real time data fidelity. The telemetry will be pushed to your Supabase or PostgreSQL backend Best regards, Bharat Joshi

@loxtic

Hi, how are you doing? I have solid hands-on work with OPC UA server/client setups, SCADA integration for solar plants, and data flows from PLC/Modbus TCP to cloud spaces. I’ve mapped tags, tuned polling vs subscription, and worked on data quality and OT security with certificates and VPN basics. I’ve used Node.js and Python in related projects, plus cloud DBs like PostgreSQL and Supabase. Happy to share portfolio and discuss scope, timelines, and availability. Let me know further if interested

@Jaydeep365

Hello, Your project is interesting and aligns with a large part of my technical background, especially backend systems, cloud integrations, APIs, Node.js, Python, PostgreSQL, and data-driven platforms. My direct experience is stronger on the software/cloud integration side rather than pure field-level SCADA engineering, but I understand industrial connectivity workflows involving telemetry collection, secure data transfer, device integrations, and structured data pipelines. ~How I can help: *Build secure backend/API layer for OPC UA data ingestion into your platform *Node.js / Python services for polling, subscriptions, normalization, and storage *Supabase / PostgreSQL schema design for telemetry and digital twin data *Cloud integration for dashboards, analytics, alerts, and reporting *Tag mapping structures, data quality checks, logging, and monitoring *Secure architecture with VPN/certificate-based connectivity support *Scalable systems for real-time and historical plant data My background includes 9+ years in full-stack development, backend architecture, APIs, cloud systems, dashboards, and enterprise integrations. If your need is a hybrid profile — someone who can work with your OPC/SCADA specialist and build the software side properly — I can add strong value there. Let’s connect first so I can understand your current plant setup, data sources, and integration model in detail. Thanks, JB

@anandan1995

Hello, I have read your job description and I am interested in your job post. I am ready to start now. Please send me a message to discuss more about your project, Already worked with matrikon , kepware in opc da for getting tag value and log in database, etc using c# .net Can you please give me a chance I am a Senior Software Developer with over 8+ years of experience in designing and developing scalable web and desktop applications. I specialize in Microsoft technologies and delivering high-quality, secure, and performance-driven applications. My Expertise: Backend Development:ASP.NET, ASP.NET Core, MVC, Web API, WebForms,Laravel, WCF Services Programming Languages:C#, Php Frontend Development:JavaScript,Angular, React, TypeScript jQuery, AJAX, HTML, CSS Database Technologies:SQL Server, MySQL Reporting Tools:Crystal Reports, RDLC, SSIS, SSRS

@jagratip3

Hi, This is Elias from Jagrati. This project is really about building a secure and reliable data bridge between SCADA systems and your cloud-based digital twin, not just connecting endpoints. The key is ensuring clean, structured, and trustworthy telemetry flows from plant-level systems into your platform with minimal latency and zero risk to OT environments. My approach would be to design a read-only OPC UA integration layer that safely connects to SCADA/PLC systems, with proper tag mapping, subscription handling, and data normalization before pushing it to your cloud stack. I would focus on secure communication (certificates, VPN, network isolation), along with optimized polling/subscription strategies to balance data accuracy and system load. The architecture would remain modular so it can scale across multiple plants and support future analytics or AI-driven features. I have a few questions to better align the solution: Q1: Which SCADA systems or OPC UA servers are currently in use (vendor/type)? Q2: Do you prefer subscription-based streaming or controlled polling for critical tags? Q3: What level of data granularity and frequency is required for the digital twin (e.g., seconds, sub-seconds)? Happy to share similar integration architectures and discuss implementation details further. Looking forward to your response. Best Regards, JP

@letswork92

Hello, I understand that you are seeking an expert in OPC UA / SCADA integration to enhance your Solar AI Studio platform. The challenge lies in ensuring secure, read-only access to existing SCADA systems while maintaining data integrity and optimizing the architecture for seamless integration. With over 12 years of experience in full-stack development and automation, I have successfully integrated various industrial systems using OPC UA protocols. My expertise extends to Node.js for backend services, along with proficiency in Python for data processing. I am well-versed in tag mapping strategies and can provide insights on polling frequencies tailored to your solar PV requirements. Moreover, my knowledge of cybersecurity principles and VPN setups can ensure your solution remains robust against potential threats. Could you please share more about the specific SCADA systems currently in use at your solar plants? Understanding this will help me tailor my approach effectively. Looking forward to discussing this further! Best regards, [Your Name]

@susany6

Hi there! I’m excited about the opportunity to support your Solar AI Studio with secure, read-only OPC UA integration from plant SCADA systems into your cloud digital twin. I’ve worked with OPC UA client/server setups, PLC/Modbus telemetry, and tag mapping for reliable data acquisition in industrial environments. I can advise on optimal polling vs. subscription strategies, data quality handling, and clean tag structuring to ensure accurate analytics downstream. I’m also comfortable addressing OT cybersecurity concerns—VPNs, certificates, and safe network segregation for read-only access. On the cloud side, I have experience with Node.js, Python, and PostgreSQL/Supabase integrations for ingesting and processing telemetry at scale. Happy to share relevant project work and discuss availability for a focused, project-based engagement.

@Premiya3

Dear sir, thank you for your job posting. I can support your Solar AI Studio with secure, read-only OPC UA integration from SCADA systems. I have experience with OPC UA client/server setup, tag mapping, telemetry handling, polling/subscription strategies, and ensuring reliable data flow from PLC/SCADA environments. I understand Modbus TCP, data acquisition, and OT network constraints, and can advise on secure architecture using VPNs, certificates, and best practices for safe cloud integration. I’ve also worked with Node.js/Python and PostgreSQL-based systems for handling and processing telemetry data. Thank you very much. Premiya

@NishantPathak186

I am professional in this i can do it easily and very fast because I am working experience of 4year+ With apple

@sandipm1307

With a passion for automation and years of experience in the field, I am confident that I am the best-suited freelancer for your OPC UA / SCADA Integration project. Having worked extensively with industrial communication protocols like OPC UA and Modbus TCP/RTU, I have developed a deep understanding of all aspects required for your solar plant SCADA systems integration needs. My expertise extends to programming in Node.js and Python, which will be integral in ensuring a secure, read-only OPC UA integration between your existing SCADA systems and your cloud-based solar digital twin application. Through my previous projects, I have been able to harness the power of these programming languages to create real-time monitoring systems, enable remote control functionalities, as well as streamline data logging processes. In addition, my proficiency with Supabase/PostgreSQL and experience of working with various cloud platforms ensure that not only can I deliver on your immediate requirements but also quickly adapt to any future developments within your system. My approach is always focused on delivering sustainable and scalable solutions. Overall, my commitment is to assist you in realizing the full potential of your platform. By leveraging my skills in cybersecurity.

@HOANLK9

Hello, I'm Hoan, an Industrial Automation Engineer with 6 years of experience in development, programming, and commissioning of PLC control systems, HMI, and SCADA applications for industrial automation projects ✅PLC Programming : Siemens: S7-1500F/H, S7-400, S7-400F/H/R, S7-300, S7-1200, S7-200, S5, LOGO! Rockwell (Allen-Bradley): SLC500, MicroLogix, CompactLogix Schneider: Zelio, M171, M172 Delta: DVP-ES2, DVP-SA2, DVP-SA Mitsubishi: A Series, Q Series, FX Series LS: XGB, XBC, Master K200, Master K300 Omron: CP Series, CJ Series Inovance: H1U, H2U, H3U, H5U, H6U] ✅HMI Development : Siemens -- Weintek -- Schneider -- Wecon -- Proface -- Inovance ✅SCADA Systems : WinCC -- In Touch Wonderware -- Ignition -- SCADA C# -- GENESIS64 ✅VFD / Inverter Integration : Siemens -- ABB -- Danfoss -- Hitachi --Delta -- Mitsubishi -- LS -- Schneider ✅ Industrial Communication : PPI-MPI -- Profibus -- AS-i -- Profinet -- Ethernet/IP -- Modbus RTU/Modbus TCP ✅ OPC Communication : PC Access -- OPC Scout -- OPCUA -- Kepware ✅Programming Languages : C# -- VBA -- VB.net -- Javascript -- Python -- VBS ✅ Online support about AutoCad drawing and schema. ✅ Online support about AutoCad platform & Engineering development. ✅ Online support about EPLAN platform & Engineering development. ✅ Electrical schematic development tool API on EPLAN P8 platform. ✅Contact Feel free to contact me for more information. Ready to support your project. I look forward to working with you. Regards,Hoan