Senior Backend Engineer

Job Title : Python Django Developer

Experience : 3+ Years

Location : Gurgaon (Work from Office)

Job Summary :

We are looking for an experienced Python Django Developer with strong expertise in building scalable web applications and distributed systems. The ideal candidate must have hands-on experience with Django, Redis, Celery, RabbitMQ, PostgreSQL, and Kafka to design and optimize high-performance applications.

Mandatory Skills :

Python, Django, Redis, Celery, RabbitMQ, PostgreSQL, Kafka

Key Responsibilities :

• Design, develop, and maintain web applications using Python & Django.
• Implement asynchronous tasks and background job processing using Celery with RabbitMQ/Redis.
• Work with PostgreSQL for database design, optimization, and complex queries.
• Integrate and optimize messaging/streaming systems using Kafka.
• Write clean, scalable, and efficient code following best practices.
• Troubleshoot, debug, and optimize application performance.
• Collaborate with cross-functional teams (frontend, DevOps, QA) for end-to-end delivery.
• Stay updated with the latest backend development trends and technologies.

Requirements :

• Minimum 3+ years of experience in backend development using Python & Django.
• Hands-on experience with Redis, Celery, RabbitMQ, Kafka, and PostgreSQL.
• Strong understanding of REST APIs, microservices architecture, and asynchronous task management.
• Knowledge of performance tuning, caching strategies, and scalable system design.
• Familiarity with Git, CI/CD pipelines, and cloud deployment (AWS/GCP/Azure) is a plus.
• Excellent problem-solving and communication skills.

JOB DESCRIPTION

Experience: 5+ years

Wissen Technology is now hiring for a Java Developer - Bangalore with hands-on experience in Core Java, algorithms, data structures, multithreading and SQL. We are solving complex technical problems in the industry and need talented software engineers to join our mission and be a part of a global software development team. A brilliant opportunity to become a part of a highly motivated and expert team which has made a mark as a high-end technical consulting. 

Required Skills:

• Exp. - 5+ years
• Experience in Core Java and Spring Boot.
• Extensive experience in developing enterprise-scale applications and systems. Should possess good architectural knowledge and be aware of enterprise application design patterns.
• Should have the ability to analyze, design, develop and test complex, low-latency client- facing applications.
• Good development experience with RDBMS.
• Good knowledge of multi-threading and high-performance server-side development.
• Basic working knowledge of Unix/Linux.
• Excellent problem solving and coding skills.
• Strong interpersonal, communication and analytical skills.
• Should have the ability to express their design ideas and thoughts.

Must Have Skills:

• Overall 10+ years of experience in application development using Golang.
• Experience in designing and developing REST based services / Microservice development.
• Ability to design scalable, robust, and error-tolerant systems.
• Understanding of software architecture and distributed systems.
• Proficient in writing efficient and optimized algorithms under time constraints.
• Skilled in developing solutions that balance performance, readability, and maintainability.
• Ability to effectively communicate coding decisions and rationale during problem-solving discussions.
• Hands-on experience with queuing mechanisms such as Kafka or RabbitMQ.
• Candidates should be adaptable and eager to quickly learn and integrate into the existing tech stack if they lack direct experience.
• Candidate should have good communication skills (written and verbal).
• Experience with delivering projects in an agile environment using SCRUM methodologies.

Good to have:

• Experience to AWS, CI/CD, DevOps.
• Experience using container management tools such as Kubernetes, Docker and Rancher.
• Any one of these data store Cassandra, Postgres, Couchbase, or other NoSQL servers.

This Is NOT a Typical Java Role If your experience is mostly CRUD APIs, controller wiring, or shallow service layers — this role is not for you. We are looking for a top tier backend engineer who thrives on: 

* Designing complex algorithms 

* Building high-performance, memory-efficient systems 

* Owning deep backend logic that actually moves the needle 

You will work close to the core engine of the product, not the edges.

What You’ll Be Trusted With 

* Architect and build backend systems that must perform under load 

* Design and implement custom algorithms for real-world, non-trivial problems 

* Solve performance bottlenecks involving CPU, memory, I/O, and concurrency 

* Build backend services where latency, throughput, and correctness matter 

* Own document & PDF processing pipelines end-to-end:     

-Composition     

-Rendering     

-Optimization     

- High-volume generation 

* Make hard technical decisions and stand by them

Non-Negotiable Skills 

* Exceptional Java expertise (Core Java, Spring Boot, Java 8+) 

* Strong command over:     

• Data structures & algorithms 
• Multithreading & concurrency models     
• JVM internals & memory management 

* Proven experience building custom algorithms (this will be evaluated) 

* Deep backend engineering experience with Spring / Spring Boot 

* Strong understanding of:     

• API design principles     
• Fault tolerance & resilience     
•  Performance tuning & profiling 

* Ability to reason about time complexity, space complexity, and trade-offs 

* Strong database fundamentals (query optimization, indexing, transactions) 

* Experience with message brokers (ActiveMQ, Kafka, RabbitMQ) 

* Exposure to Kubernetes-based deployments or large-scale microservices 

Interview Focus (Be Prepared) 

* Algorithm design & problem solving 

* Deep Java fundamentals 

* System design discussions (backend-heavy) 

* Performance tuning scenarios 

* Real-world debugging and optimization challenges

Required Experience

3 - 8 Years

Skills

Java/J2EE,

Spring,

microservices

+ 1 more

• Develop unit, integration, and functional tests within Grails/Java and contribute to new architectures design for multi-tier Java EE-based products in a SOA environment.
• Interact with Business Analysts to understand software build configuration and testing processes, documenting application functionality and programming accordingly.
• Collaborate with a talented software team to work on various types of applications, ensuring the building of backend APIs using Java-based technologies.
• Stay updated with the latest trends and technologies, conducting POCs on new technical stacks to support and maintain a portfolio of applications.
• Utilize core Java skills to define, design, develop, integrate, test, deploy, maintain, and troubleshoot applications and tools written in Java and other related languages.
• Provide technical expertise in Java development, including Spring, Hibernate, and building scalable solutions for large web application deployments.
• Participate in the full SDLC, from requirements and design to development, testing, and deployment, ensuring the implementation of best practices and industry-standard procedures.
• Possess hands-on experience with Java, J2EE, Spring Boot, microservices, and web services, while also demonstrating proficiency in writing enterprise-strength code and developing backend APIs.
• Work in an agile environment, supporting users by developing documentation and offering assistance with tools, while promoting established development standards and change control procedures.

Role- Software Development Engineer-2

As a Software Development Engineer at Amazon, you have industry-leading technical abilities and demonstrate breadth and depth of knowledge. You build software to deliver business impact, making smart technology choices. You work in a team and drive things forward.

Top Skills

You write high quality, maintainable, and robust code, often in Java or C++ or C#

You recognize and adopt best practices in software engineering: design, testing, version control, documentation, build, deployment, and operations.

You have experience building scalable software systems that are high-performance, highly-available, highly transactional, low latency and massively distributed.

Roles & Responsibilities

You solve problems at their root, stepping back to understand the broader context.

You develop pragmatic solutions and build flexible systems that balance engineering complexity and timely delivery, creating business impact.

You understand a broad range of data structures and algorithms and apply them to deliver high-performing applications.

You recognize and use design patterns to solve business problems.

You understand how operating systems work, perform and scale.

You continually align your work with Amazon’s business objectives and seek to deliver business value.

You collaborate to ensure that decisions are based on the merit of the proposal, not the proposer.

You proactively support knowledge-sharing and build good working relationships within the team and with others in Amazon.

You communicate clearly with your team and with other groups and listen effectively.

Skills & Experience

Bachelors or Masters in Computer Science or relevant technical field.

Experience in software development and full product life-cycle.

Excellent programming skills in any object-oriented programming languages - preferably Java, C/C++/C#, Perl, Python, or Ruby.

Strong knowledge of data structures, algorithms, and designing for performance, scalability, and availability.

Proficiency in SQL and data modeling.

We at Spiral Dev Apps are looking for a Android Developer who can lead the full project of android app, right from initializing the app from scratch and putting it on the Play store. Can do attitude in startup environment is a must Quality that we look for, You need to find answers on your own without handholding.

Skills Required:
• Strong knowledge of Android SDK, different versions of Android, and how to deal with different screen sizes.
• An Android app developer must be well-versed with the Java programming language.
• Strong knowledge of Android UI design principles, patterns, and best practices
• Having knowledge about offline storage, threading, and performance

Profile: Android Developer
Experience: 1 to 5 years
Immediate joiner preferred
Excellent Communication Skills
Good salary hike