• Backend Engineer - IIOT Platform

    US Tech Solutions (Dallas, TX)


    Backend Engineer - IIoT Platform (On Prem Kubernetes, MQTT, TimescaleDB, Schema Registry)

    Dallas, TX (once in a month or as needed)

    4 months contract to hire

     

    Pay Rate: 80/Hr on W2

    Key responsibilities

    Backend services and APIs

    + Build stateless, performant services (Go/Java/Python) for ingest, validation, enrichment, and persistence.

    + Define versioned contracts (REST/gRPC), ensure backward compatibility, idempotency, and robust retries.

    + Provide shared libraries for schema validation, authN/Z, tracing.

    MQTT messaging

    + Implement producer/consumer services with QoS 0/1, retained messages, shared subs, session persistence.

    + Design tenant aware topic hierarchies, ACLs, and secure device onboarding.

    + Enforce TLS/mTLS, certificate rotation; optimize throughput with batching and backpressure.

    Data contracts (Forge) and CI enforcement

    + Model telemetry/events with JSON Schema; strict compatibility rules and gated CI checks.

    + Validate in the data plane; route bad payloads to DLQ with replay tooling.

    + Lead producer/consumer versioning and migrations.

    Time series storage (TimescaleDB)

    + Design hypertables, compression, retention; high throughput ingest with ordering, dedupe, upserts.

    + Optimize reads via continuous aggregates and indexes; own backup/restore and PITR.

    On prem Kubernetes

    + Ship Helm charts; manage Deployments/StatefulSets, HPA/VPA, probes, resource tuning.

    + Establish end to end observability (metrics/traces/logs), actionable alerts; GitOps for promotion/rollback.

    Security, multi tenancy, and reliability

    + Zero trust defaults: mTLS, RBAC hardening, network policies, per tenant isolation.

    + Secrets/PKI management (Vault/KMS), audit logging; ingress/egress controls and rate limits.

    + Define SLIs/SLOs; canary/blue green, chaos testing; runbooks, on call, post mortems; DLQ/quarantine and replay.

    Collaboration and delivery

    + Strong PR hygiene, branch protections, semantic versioning, release tagging in GitHub.

    + Document ADRs, runbooks, and APIs; align OT tag models/payloads with backend contracts.

    Required qualifications

    + 5+ years building production backend services in Go/Java/Javascript/C/Python.

    + Deep MQTT understanding (EMQX/HiveMQ/Mosquitto): QoS 0/1, retained, shared subs, sessions, ACLs, TLS/mTLS.

    + On prem Kubernetes or docker: Helm, compose, observability, autoscaling, GitOps, secure multi tenant ops.

    + Time Series Database/historian: hypertables, compression, retention, continuous aggregates, performance, backup/restore.

    + Schema registry with JSON Schema; CI enforced compatibility.

    + CI/CD (GitHub Actions or similar): build/test, canary/blue green, artifacts, automated rollbacks.

    + Security: PKI, certificates, least privilege, network segmentation, Vault/KMS, audit logging.

    Nice to have

    + Ignition (Transmission/Engine), OPC UA/Modbus/EtherNet/IP.

    + Kafka/Pulsar and MQTT bridges; CDC/outbox patterns.

    + IaC (Terraform/Ansible), Rancher/OpenShift; edge (K3s).

    + Service mesh (Istio/Linkerd) for mTLS/traffic policy.

    + Hybrid AWS for backup/analytics (ECR/S3/Glacier, secure tunneling).

    About US Tech Solutions:

    US Tech Solutions is a global staff augmentation firm providing a wide range of talent on-demand and total workforce solutions. To know more about US Tech Solutions, please visit www.ustechsolutions.com (http://www.ustechsolutionsinc.com/) .

     

    US Tech Solutions is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.