QA Software (Load & Performance) Test Engineer

Shape the utilities market of the future with us!

We are looking for a "

Load and Performance Engineer"

to design, execute, analyze, and report performance tests for the ZONOS ecosystem with it's modules/Connectors related to MDM & HES

,

APIs, streaming services, databases, and integration components.

The engineer will define realistic load profiles, simulate production-like traffic, identify bottlenecks, measure system capacity, and provide performance recommendations before release or customer deployment.

What is the role about?

Key Responsibilities

Design and execute load, stress, scalability, spike, and failover performance tests for HES/MDM product

Create realistic test scenarios covering:

ZONOS API and Southbound API

VEE processing

MDUS / data ingestion flows

Device events, alarms, meter reads, topology, and profile data

Kafka/streaming pipelines

Database-heavy operations

ZCP user workflows where relevant

Define performance KPIs such as:

response time

throughput

transactions per second

message ingestion rate

processing latency

CPU/memory usage

database load

Kafka lag

error rate

queue depth

Maintain load test scripts using tools such as "

JMeter, k6, Simulator and Mock serve"

.

Monitor performance using tools such as "

Prometheus, Grafana".

Analyze bottlenecks across:

APIs

database queries

Kafka topics/partitions

backend services

VEE jobs

process engine

network and infrastructure

JVM/container resources

Prepare detailed performance reports with findings, risks, recommendations, comparison with previous versions and release readiness conclusions.

Work with QA, DevOps, backend developers, product owners, and customer delivery teams to define acceptance criteria and performance baselines.

Required skills and qualifications

Bachelor's degree in Computer Science, Engineering, Information Systems, or equivalent experience.

3+ years of experience in performance testing, load testing, or performance engineering.

Had experience in the Energy Management utility (Meter data management, HES ….)

Strong understanding of:

REST APIs

authentication flows

asynchronous processing

queues and event streaming

distributed systems

microservices performance behavior

Experience with monitoring and observability:

Prometheus

Grafana

JVM or container metrics

Good knowledge of databases and query performance, preferably in addition to good knowledge about system setup:

PostgreSQL

Oracle

Experience testing high-volume data ingestion, messaging, or IoT/AMI/utility platforms is highly preferred.

Ability to analyze logs, metrics, traces, and system behavior under load.

Strong scripting skills in at least one language:

Python

JavaScript

Groovy

Bash

Java

Preferred skills and qualifications

Skills with:

Kafka performance testing

AMI / smart metering systems

MDMS / MDM platforms

VEE validation and estimation workloads

DLMS/COSEM concepts

large-scale device simulation

API Director / ReadyAPI

Kubernetes or containerized environments

CI/CD integration for performance tests.

• Experience: 3+ years
• Seniority: Mid Level
• Education: Bachelor's degree preferred
• Languages: English