Senior Software Developer — Industrial Edge

About Sensia

We bring together the best of the best: the pioneering process automation, real-time control and IoT technologies of Rockwell Automation, combined with the unmatched measurement and instrument, software and analytics capabilities of Schlumberger.  Sensia is further strengthened by the oil and gas domain expertise and artificial lift experience shared by Rockwell Automation and Schlumberger. The result is Sensia – the leading automation specialist in oil and gas production, transportation and processing with a team of more than 1,000 experts serving customers globally in more than 80 countries. As the first fully integrated oilfield automation solutions provider, Sensia makes the production, transportation and processing of oil and gas simpler, safer, more secure, more productive and better understood from end to end. Now every oil and gas company can experience the advantages of industrial-scale digitalization and seamless automation, enabling each asset to operate more productively and more profitably.

We are also looking for the best of the best to join our team. If you have top-tier talent with a collaborative mindset, exceptional problem-solving skills, and the ability to generate innovative, out-of-the-box solutions. We would love to have you join our team

Job Description

Role Overview

Maintain and modernize a large Javascript /TypeScript codebase for an application designed to run on embedded Linux devices and cloud containers for industrial applications. Ensure robust Modbus RTU/TCP communications, troubleshoot serial communication and networking issues on resource-constrained Edge IoT hardware, ship cross platform (incl. Windows) utilities, and support a Nuxt-based operational/configuration UI.

Key Responsibilities

Legacy Code Maintenance

• Troubleshoot and resolve bugs as they arise from the globally deployed population of devices and users
• Refactor portions of code as-needed
• Stabilize, understand, and occasionally document legacy JavaScript/TypeScript
• Contribute to new enhancement application written in .NET by sharing insights into legacy behavior
• Add or perform characterization tests where needed
• Improve CI/CD and release hygiene

Edge Web UI

• Maintain/extend Nuxt web UI admin screens for configuration, monitoring, and diagnostics; optimize rendering and bundle size for low-power devices.
• Maintain Device configuration UI code on edge device configuration platform

Field Device Communications

• Maintain Modbus RTU and Modbus TCP adapters
• Maintain legacy communication interfaces/adapters for integration, e.g.:
• OSISoft/Aveva PI, KepServerEX, etc.
• Use your knowledge of TCP/IP networking to troubleshoot issues that arise from high-latency, small-MTU, high-packet-loss metered networks and, when necessary, modify code to better handle these networks

Embedded Linux Operations

• Optimize code for CPU and memory utilization and refactor code to minimize flash wear
• Maintain & extend device health/status "scraping" code that collects device temperature, signal strength, memory and CPU usage, docker stats, etc.
• Maintain & extend device health/status "scraping" code that monitors network status,  internal modem status (mmcli, nmcli) and external modem status (JSON-RPC or SSH-based status retrieval)
• Integrate with external industrial routers (e.g., Teltonika RUT series) when internal modems aren't applicable; align with project specific approvals and wiring practices.

Security & Reliability

• Consider and implement security best-practices; least privilege, secret handling, signed artifacts
• Design for unplanned power loss and degraded communication links, targeting graceful recovery and minimal data loss

Packaging, Cross Compilation, Building, and Testing

• Cross compile to Windows (x64/ARM64) for CLI/agent tools and Node API add ons; produce signed executables/installers (Authenticode + timestamp), and automate matrix builds in CI.
• Work closely with QA, supporting unit and automated end-to-end testing
• Testing with real hardware and physical devices

Required Skills

• Bachelor's or Master's degree in computer science, Electrical Engineering, or a related field.
• Strong proficiency in JavaScript and TypeScript, especially in backend development using   15+ yrs software development; 5+ yrs ; 2+ yrs with command-line applications/services
• Hands-on experience with Modbus RTU/TCP protocol
• Familiarity with serial communication (RS-232/RS-485) and TCP/IP networking.
• Experience with libraries such as modbus-serial, jsmodbus, or equivalent.
• Networking knowledge, dealing with high-latency networks, small MTUs, packet loss, and metered networks
• 3+ years working with Docker or other containerization technologies
• Nuxt: Routing, layouts/middleware, Vite; performance tuning (code splitting, hydration control) on constrained edge devices.
• CI/CD & Release: multi OS runners, artifact signing, SBOMs/vuln scanning.
• Compiling applications for Linux (x86-64 and ARM64) and Windows x86-64 targets
• Experience working with Agile toolsets and technologies such as Jira, Confluence, and Bitbucket.
• Ability to independently deploy and install cloud-native microservices on platforms.
• Ability to debug low-level communication issues and optimize performance under constrained environments.

Desired Skills

• Familiarity with industry IoT standards and protocol such as MQTT/SparkplugB, ZeroMQ, ProtoBuf, Kafka, and HTTP
• Strong experience with Linux, Bash, Shell scripting, Docker, TCP/IP Networking, Kubernetes, systemd, networking, logging, shell; OTA/rollback strategies and excellent debugging skills
• Cellular on Linux: hands on with mmcli (modem state, APN/profile, SIM/PIN ops) and nmcli (connections, metrics, metered profiles, link selection). (Internal playbooks reference nmcli for link testing.)
• Node API/C++ add ons; cross compiling for ARM64; single file bundlers (pkg/nexe) or Electron for support tools.
• Familiarity with .NET/C#