SOFTWARE ENGINEER

JAVA / SPRING BOOT / POSTGRESQL

Harsh Kumar.

Behind the interface.
Inside the system.

I build Java backends, APIs, and data workflows. From survey operations to energy-market software, I work on the systems people rely on every day.

CURRENTLY AT LEITNETZEXPLORE THE WORK
IN PRACTICEWork, in numbers.
2+

years building
backend systems

20+

franchises supported
by the enterprise CRM

500+

orders handled daily
by CRM modules

01 / SELECTED WORK

A few things
I’ve worked on.

Professional projects, with a closer look at the backend work I contributed.

01 /CONTINUUM INSIGHTS2024 — 2026

SURVEYS & OPERATIONS

Survey management
platform

I worked on APIs and data workflows for multi-country survey operations. Reusable templates helped bring setup from 2+ hours down to 20–25 minutes.

JavaSpring BootPostgreSQL
Read about my work
SETUP TIME SETUP / PROJECT
BEFORE2+hrs
AFTER20–25min
01 Configure02 Template03 Launch

↳ Reusable templates. Less repetitive work.

CONNECTED OPERATIONSCRM / 02
20+FRANCHISES
500+ORDERS / DAY
PlacementFulfillmentInvoicing
02CONTINUUM INSIGHTS

BUSINESS OPERATIONS

An enterprise CRM
for 20+ franchises.

I built order-management modules and analytics APIs for a franchise network handling 500+ orders a day.

Spring BootSpring MVCPostgreSQL
Read about my work
ENERGY-MARKET COMMUNICATION03
UTILMDMSCONSINVOIC
Rule-driven
validation
AHB / MIGDATA INTEGRITYAUDITABILITY
03LEITNETZ UGONGOING

CURRENT WORK

Software for the
energy market.

At Leitnetz, I’m building Java services for EDIFACT message processing, validation, and workflow tracking, with an AI sidecar in development.

MicroservicesEDIFACTAI integration
Read about my work

Built as part of a team. These notes focus on my contributions.

More on GitHub

↳ UNDER THE HOOD

One request.
A few moving parts.

Most of my work sits between an API call and the database. Here’s a small, interactive example of how those layers fit together.

  1. 01 A clear API contract
  2. 02 Explicit access rules
  3. 03 Business logic in the service
  4. 04 Consistent database writes
Select a layer, or run the request.
Request lifecycleJAVA / SPRING
response
03 / THE LOGIC

Give business rules a home.

The service coordinates the operation. Keeping this logic out of controllers makes it easier to test and change.

Press run to follow a request through the layers.

02 / EXPERIENCE

Where I’ve
been building.

From survey and franchise operations to regulated energy-market communication.

Download my CV
MAY 2026 — PRESENT NOW

Software Engineer

Leitnetz UGNuremberg, Germany · Remote

Building Java microservices for regulated energy-market communication. Working across EDIFACT validation, persistent workflows, and AI-assisted error analysis.

MicroservicesEDIFACTAI sidecar
JULY 2024 — APRIL 2026

Backend Developer

Continuum InsightsGurugram, India

Developed survey-management and enterprise CRM backends. Streamlined setup workflows, built order-management APIs, and improved PostgreSQL query performance.

Spring BootREST APIsPostgreSQL

03 / THE TOOLKIT

The tools
I work with.

Mostly Java and Spring Boot, with PostgreSQL underneath. The rest supports the work around them.

01

Backend & APIs

Business logic with a clear contract.

  • Java
  • Spring Boot
  • RESTful APIs
  • OpenAPI / Swagger
02

Data & persistence

Reliable data. Considered queries.

  • PostgreSQL
  • JPA / Hibernate
  • Liquibase
  • SQL optimization
03

Security & access

The right access, in the right places.

  • Spring Security
  • JWT / OAuth2
  • RBAC
  • BCrypt
04

Architecture

Connecting services and workflows.

  • Microservices
  • Monolithic systems
  • Kafka
  • API contracts
05

Delivery & operations

From a local change to deployment.

  • Docker
  • Kubernetes
  • GitHub Actions
  • AWS · foundational
06

Quality & tooling

Confidence in every iteration.

  • JUnit
  • Spring Boot Test
  • Git / GitHub
  • Postman

ALSO IN MY WORKFLOW IntelliJ IDEA · VS Code · GitHub Copilot · Codex · Claude Code

04 / A LITTLE ABOUT ME

Hello again.
I’m Harsh.

Harsh KumarHaryana, IndiaCurrently working remotely.

I’m a software engineer from Haryana. Most of my work happens behind the interface: in APIs, business rules, and the database queries that keep a product moving.

I studied Computer Science at DCRUST, then joined Continuum Insights to work on survey and CRM backends. I now work remotely with Leitnetz on energy-market communication.

One thing I’m working on now: using an AI sidecar to help with message validation and error analysis. It’s still in development.

EDUCATION / 2020 — 2024

B.Tech, Computer Science & Engineering

DCRUST University, Murthal CGPA 7.84

CONTINUED LEARNING

Developer virtual experience programs

Accenture & Goldman Sachs

05 / GET IN TOUCH

Have something
in mind?

If you’d like to talk about a role, a project,
or something I’ve worked on, send me a note.

harsh.kumar9118b@gmail.com