Senior Software Developer

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

We’re seeking a Senior Software Developer with strong JavaScript/TypeScript skills to help modernize and maintain a mission-critical Node.js application powering industrial IoT edge devices. This software runs on embedded Linux IoT Edge devices and cloud containers, enabling reliable field device communication in challenging environments.

You’ll work with Modbus RTU (serial)/TCP protocols, troubleshoot legacy communication adapters and networking issues on resource-constrained IoT Edge hardware, optimize performance on resource-constrained hardware, ship cross platform (incl. Linux/Windows, X86/ARM64) utilities, and support a Nuxt-based operational/configuration UI. Join us to shape the future of industrial edge computing and make a real impact in global infrastructure.

Roles and Responsibilities

Legacy Code Maintenance

• Identify and prioritize areas of technical debt for future refactoring and modernization.

• Troubleshoot and resolve bugs as they arise from the globally deployed population of devices and users

• Stabilize, understand, and document legacy JavaScript/TypeScript code and it’s associated functionality

• Contribute to new generation of the application written in .NET by sharing insights into legacy behavior

• Maintain clean version control practices and contribute to branching strategies for legacy code stability.

• 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.

• Ensure UI components follow usability and accessibility best practices for industrial environments.

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

• Contribute to protocol abstraction layers or expand support for additional industrial protocols as needed.

• Monitor and optimize communication performance across diverse field environments.

Embedded Linux Operations

• Optimize code for lower CPU and memory utilization for industrial edge device and refactor code to minimize flash wear

• Maintain & extend device health/status reporting code that collects device temperature, signal strength, memory and CPU usage, docker stats, etc.

• Maintain & extend device health/status reporting 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

• Contribute to vulnerability scanning, SBOM generation, and patching strategies for deployed devices.

• Implement audit logging and diagnostic tools to support post-incident analysis and system forensics.

Packaging, Cross Compilation, Building, and Testing

• Cross compile to Windows (x64), Linux (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

• Maintain and improve build scripts and tooling to support scalable, reproducible builds.

• Manage release artifacts, versioning, and distribution channels for internal and external deployments.

Qualifications and Education Requirements

• BS or MS degree in Computer Science, Computer Engineering, Electrical Engineering, or related field.

• Minimum 7 years of relevant software development.

• Strong proficiency in JavaScript, TypeScript

• 3 years’ experience in backend development/command line application/service development using Node.js

• Must be an excellent communicator, able to clearly articulate and hear & understand abstract concepts

• Excellent problem-solving skills and ability to work independently and collaboratively

• Experience working with embedded Linux or industrial edge computing environments

Key Competencies

• Strong English language skills

• Real, hands-on experience with Modbus RTU/TCP protocol

• Strong understanding of serial communication (RS-232/RS-485) and TCP/IP networking.

• Strong networking knowledge, dealing with high-latency networks, small MTUs, packet loss, and metered networks

• Proven ability to debug low-level communication issues and optimize performance under constrained environments.

• Significant experience compiling Node.js applications for Linux (x86-64 and ARM64) and Windows x86-64 targets

• 3+ years successfully working with Docker or other containerization technologies

• Experience with CI/CD & Release piplines: multi OS runners, artifact signing, SBOMs/vulnerability scanning.

• Experience working with Agile toolsets and technologies such as Jira, Confluence, and Bitbucket.

• Experience with profiling tools and techniques to optimize performance on constrained hardware.

• Ability to collaborate effectively with hardware, QA, and DevOps teams in a fast-paced environment.

Desired Skills

• Experience with libraries such as modbus-serial, jsmodbus, or equivalent.

• Ability to independently deploy and install cloud-native microservices on platforms.

• 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

• Hands-on experience deploying software in industrial environments, including remote diagnostics and field support.

• Nuxt: Routing, layouts/middleware, Vite; performance tuning (code splitting, hydration control) on constrained edge devices.

• 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#