Senior Cloud Engineer - IoT Data Plan

We are Proud to be SJE!

At SJE, we are more than a company — we are a family of brands with a shared vision and mission to provide industry-leading, innovative, and reliable control and monitoring solutions that improve efficiencies, protect the environment, and deliver dependable solutions to our valued customers. We are looking for a Senior Cloud Engineer – IoT Data Plane to help build the next generation engineering team for our AMI Global brand. This role may work remote, but we would prefer a candidate to be near one of our SJE locations.

Our AMI brand is a leading IoT connectivity solution for equipment via hardware, SaaS, and software. Its gateways and cloud connected solutions enable real-time monitoring, control, analytics, and commercialization support. We provide integration, development, and go-to-market services. Check us out at AMI Global!

More about how we work:

• We default to managed and serverless. We’d rather pay AWS to run infrastructure than hire ops headcount to run it ourselves. Industry-standard protocols and formats (OpenAPI, OICD/OAuth2, OpenTelemetry) are the default; bespoke inter-service protocols require a written argument before they ship.
• Tests gate every merge. We aim for boring releases. GitHub is source of truth and deploys go out in waves across tenant accounts, so a bad release stops at the first wave rather than reaching every customer at once.
• AI tooling is woven into how we work, across pair programming, code generation, and test scaffolding. The productivity gain is real, and we staff around it.
• On-call is business hours during the first phases of rollout, expanding as the platform matures.

The job:

As our Senior Cloud Engineer, you will own the data plane end-to-end. Modbus telemetry comes in over MQTT, gets normalized at ingest against a versioned device-type mapping, lands in a semantic time-series store, and goes back out through our public API. You will be sizing the architecture for hundreds of thousands of devices, and a meaningful share of our customers consume the platform headlessly through that API rather than through the UI. Key responsibilities include:

• MQTT broker selection: AWS IoT Core, self-hosted, or managed third-party. There is an open ADR; you will write it.
• Telemetry ingestion at fleet scale: Backpressure, validation, dead-letter handling, surviving the occasional poison-pill payload without taking the platform with you.
• Semantic data model: Raw Modbus comes off the wire and gets normalized at ingest against a versioned, device-type-aware mapping. Alerts, reports, analytics, and customer APIs all read from the normalized form. Getting this right early is high-leverage; getting it wrong is hard to walk back.
• Time-series storage: Engine choice (Timestream, Influx, ClickHouse, or something we haven’t picket yet), partitioning, retention, query patterns.
• Public API contract: Co-designed with our launch customer; versioned, OpenAPI-described, semantic. Some customers consume the platform headlessly, and the API is what they actually integrate against.
• Cost per device and cost per tenant, instrumented early. Serverless at IoT volumes can get expensive in non-obvious ways, and we would rather find that out at design time.

You will be working alongside another founding cloud engineer (full-stack web) plus two senior edge engineers and the Director of Engineering, who is also writing code for now. The broker, time-series engine, and ingest topology you settle on in the first few months will be hard to undo, which is why this a senior level role.

The skills, education, and experience you need:

To succeed in this role, you must have experience with:

• Building production cloud systems on AWS (7+ years), with deep IoT or large-scale streaming
• Operating a MQTT-based device fleet at 100k devices, or a comparable ingest-heavy streaming workload (Kinesis, MSK, Kafka, etc.) at similar scale
• Making strong opinions on time-series storage trade-offs, based on what you have actually run
• Writing design documents. You will write a handful in the first 90 days and we will argue about them
• IaC (Terraform or CDK) and CI/CD (must be fluent). Nothing in production gets provisioned by hand
• Talking to customer engineering teams directly. The launch customer co-designs the API; you will be in those conversations

A 4-year degree in Computer Engineering, Computer Science, Electrical Engineering or equivalent degree and 7-10 years of experience are required.

Bonus Qualifications:

• Industrial IoT or critical-infrastructure background (water, energy, manufacturing, building automation)
• Modbus or other industrial-protocol exposure
• ISO 27001 or SOC 2 platform experience
• Multi-account AWS Organizations / Control Tower experience

Answering your questions:

When you are considering a new job, it is normal to have a ton of questions. Here are a few questions we are asked all the time.

• What are the hours? Monday – Friday 8:00 am – 5:00 pm.
• What is your Paid Time Off and holiday policy? Up to 120 hours of Paid Time Off in your first year plus 8 paid holidays.
• What benefits do you offer? We offer a robust benefits package including health, life, short-term and long-term disability insurance as well as dental and vision programs you need to take care of your family, along with other benefit options. Check out our full benefits package!
• What is my commute? Check out our SJE locations: SJE Locations

We will answer more of your questions during the first interview. Expect to hear about the next steps if you meet the job requirements.

Why Work With Us
At SJE, we believe in empowering our employees to grow professionally while making a real impact. We offer competitive pay, excellent benefits, and a collaborative culture that encourages creativity and problem-solving. Join us and become a part of something bigger. Join a company where you’re not just working—you’re building a legacy!

Learn more and apply on-line at www.sjeinc.com. SJE is an Equal Opportunity Employer.

Designs and manufactures control solutions for water and wastewater industries.