Load & Performance Engineer

Cuculus GmbH

Bengaluru

On-site

INR 1,500,000 - 2,500,000

Full time

14 days+

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Job summary

Cuculus GmbH is seeking a Load and Performance Engineer to design, execute, and report performance tests across the ZONOS ecosystem, including MDM/HES modules, APIs, streaming services, databases, and integration components.

You will define realistic load profiles, simulate production traffic, identify bottlenecks, and provide recommendations before release or customer deployment. Requires 3+ years in performance testing and strong scripting skills.

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.
Experience in Energy Management utility (Meter data management, HES…).
Strong understanding of REST APIs, authentication flows, asynchronous processing, queues and event streaming, distributed systems, and microservices performance behavior.
Experience with monitoring and observability: Prometheus, Grafana, JVM or container metrics.
Good knowledge of databases and query performance: 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 Python, JavaScript, Groovy, Bash, Java.

Responsibilities

Design and execute load, stress, scalability, spike, and failover performance tests for HES/MDM products.
Create realistic test scenarios covering APIs, data ingestion, streaming pipelines, and database-heavy operations.
Define performance KPIs: response time, throughput, transactions per second, message ingestion rate, processing latency, CPU/memory usage, and Kafka lag.
Maintain load test scripts using tools such as JMeter, k6, Simulator and Mock server; monitor performance with Prometheus and Grafana.
Analyze bottlenecks across APIs, database queries, Kafka topics/partitions, backend services, VEE jobs, and container resources.
Prepare detailed performance reports with findings, risks, recommendations, and release readiness conclusions.

Skills

REST APIs

authentication flows

asynchronous processing

queues & event streaming

distributed systems

microservices performance

Python

Java

JavaScript

Groovy

Bash

Education

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

Tools

Prometheus

Grafana

JMeter

Simulator

Mock server

JVM metrics

Container metrics

Job description

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.

Your Mission & Impact

Your Role at a Glance

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: