Backend Developer (Java – Spring Boot)

Java Developer (Spring Boot)

Core in Java | Real-Time Systems | High Ownership

Location:

Work Week:

Salary:

Education:

Apply: dr.developer88@gmail.com | sujanrijal@codemantra.io

About Us

We’re an EdTech startup on a mission to create transformative learning systems that empower 1 million+ students worldwide. We're building from scratch — clean code, scalable architecture, and modern backend systems — to deliver real, measurable impact.

you’ll build systems that power learning at scale

Who We’re Looking For

Backend Developer

If you’re serious about engineering, know your tools, and want your code to drive real-world change — this is for you.

What We’re Looking For

Experience:

• 3–5 years of full-time professional backend development experience
• Core backend expertise using Java and Spring Boot

Core Skills (Must-Have):

• Advanced

  Spring Boot (3+)

  – REST APIs, controllers, services, repositories
• Deep knowledge of

  JPA/Hibernate

  ,

  MySQL/PostgreSQL

  – data modeling and optimization
• Experience with

  Spring Security

  ,

  JWT

  , role-based auth
• Familiar with

  WebSocket + STOMP

  , real-time messaging (Spring Messaging)
• Solid grasp of

  microservices

  ,

  API design

  , and scalable architecture
• Strong debugging, logging, and performance tuning skills
• Production-grade code: secure, testable, well-documented

General Tools:

• Docker

  ,

  Git

  ,

  Postman

  ,

  Swagger/OpenAPI

  , CI/CD pipelines (e.g., Jenkins)
• Writing unit and integration tests with

  JUnit

  ,

  Mockito

• Redis for caching or async task management

Bonus Points For:

• Experience with

  Kafka

  ,

  RabbitMQ

  , or other event/message brokers
• Familiarity with

  DevOps

  ,

  NGINX

  ,

  deployment pipelines

• Built or maintained real-time features

  (notifications, scheduling, chat, etc.)
• Worked on

  EdTech

  , eLearning, or high-performance systems before

What You’ll Do

• Build, test, and deploy RESTful APIs and backend logic using Spring Boot
• Implement real-time features using WebSocket + STOMP
• Collaborate closely with the frontend and product teams
• Own backend features end-to-end: DB, logic, testing, and delivery
• Design systems with scale, performance, and maintainability in mind
• Optimize queries, refactor inefficient logic, and reduce technical debt
• Write clean, documented, and secure code that can stand the test of scale

Why Join Us?

• Build with purpose

  — every line of code you write will impact real learners

• Startup energy

  — small, fast-moving team that rewards speed and clarity

• No legacy code

  — everything is being built clean and modern

• Direct access to decision-makers

  — no endless approval chains

• Massive growth path

  — build your leadership muscle early

• Real challenges

  — from live scheduling to chat to secure data pipelines

Not for You If…

• You can’t commit full-time, 6 days/week
• You’re not open to onsite work in the near future
• You’re juggling freelance gigs or not ready to take ownership
• You need hand-holding to stay accountable

How to Apply?

sujanrijal@codemantra.io

• Your

  Resume (PDF)

• GitHub or live backend project links

• A short note on why you're excited to build products that matter

Backend Developer (Spring Boot)

Core in Java | Real-Time Systems | High Ownership

Location:

Work Week:

Salary:

Education:

Apply:

About Us

We’re an EdTech startup on a mission to create transformative learning systems that empower 1 million+ students worldwide. We're building from scratch — clean code, scalable architecture, and modern backend systems — to deliver real, measurable impact.

you’ll build systems that power learning at scale

Who We’re Looking For

Backend Developer

If you’re serious about engineering, know your tools, and want your code to drive real-world change — this is for you.

What We’re Looking For

Experience:

• 3–5 years of full-time professional backend development experience
• Core backend expertise using Java and Spring Boot

Core Skills (Must-Have):

• Advanced

  Spring Boot (3+)

  – REST APIs, controllers, services, repositories
• Deep knowledge of

  JPA/Hibernate

  ,

  MySQL/PostgreSQL

  – data modeling and optimization
• Experience with

  Spring Security

  ,

  JWT

  , role-based auth
• Familiar with

  WebSocket + STOMP

  , real-time messaging (Spring Messaging)
• Solid grasp of

  microservices

  ,

  API design

  , and scalable architecture
• Strong debugging, logging, and performance tuning skills
• Production-grade code: secure, testable, well-documented

General Tools:

• Docker

  ,

  Git

  ,

  Postman

  ,

  Swagger/OpenAPI

  , CI/CD pipelines (e.g., Jenkins)
• Writing unit and integration tests with

  JUnit

  ,

  Mockito

• Redis for caching or async task management

Bonus Points For:

• Experience with

  Kafka

  ,

  RabbitMQ

  , or other event/message brokers
• Familiarity with

  DevOps

  ,

  NGINX

  ,

  deployment pipelines

• Built or maintained

  real-time features

  (notifications, scheduling, chat, etc.)
• Worked on

  EdTech

  , eLearning, or high-performance systems before

What You’ll Do

• Build, test, and deploy RESTful APIs and backend logic using Spring Boot
• Implement real-time features using WebSocket + STOMP
• Collaborate closely with the frontend and product teams
• Own backend features end-to-end: DB, logic, testing, and delivery
• Design systems with scale, performance, and maintainability in mind
• Optimize queries, refactor inefficient logic, and reduce technical debt
• Write clean, documented, and secure code that can stand the test of scale

Why Join Us?

• Build with purpose

  — every line of code you write will impact real learners

• Startup energy

  — small, fast-moving team that rewards speed and clarity

• No legacy code

  — everything is being built clean and modern

• Direct access to decision-makers

  — no endless approval chains

• Massive growth path

  — build your leadership muscle early

• Real challenges

  — from live scheduling to chat to secure data pipelines

Not for You If…

• You can’t commit full-time, 6 days/week
• You’re not open to onsite work in the near future
• You’re juggling freelance gigs or not ready to take ownership
• You need hand-holding to stay accountable

How to Apply?

sujanrijal@codemantra.io

• Your

  Resume (PDF)

• GitHub or live backend project links
• A short note on

  why you're excited to build products that matter

• WhatsApp: +918329918493

Email: dr.developer88@gmail.com | sujanrijal@codemantra.io