Java backend developer

Job Title: Back-End Developer

Department: IT

Experience: 3.5 Years+

Location: Mohali

Shift: Rotational Shifts

Employment Type: Full-time

Job Overview:

The Senior Backend Developer will be responsible for the full lifecycle of our backend services, focusing on architecture, security, and performance.

Key Responsibilities:

• Core API Development & Logic: Design, build, and maintain robust, scalable, and secure RESTful/ GraphQL APIs using Node.js and Python to serve both internal and external consumers.
• System Architecture: Lead the design and implementation of application components, focusing on microservices architecture, ensuring services are loosely coupled and highly available.
• Database Management: Expertly manage and optimize complex database schemas and queries for both SQL (PostgreSQL/MySQL) and NoSQL (MongoDB/Redis) systems, ensuring data integrity and high performance.
• Performance and Scalability: Identify and resolve performance bottlenecks, implement caching strategies, and optimize server-side code and architecture for maximum speed and scalability.
• Code Quality and Standards: Write clean, efficient, well-documented, and testable code. Conduct thorough code reviews and mentor junior developers on best practices, design patterns, and coding standards.
• Security Implementation: Implement security and data protection settings,including authentication, authorization, and encryption protocols.
• DevOps and Deployment: Work with DevOps pipelines (CI/CD, Docker, Kubernetes) for smooth and automated deployment of services to cloud platforms (AWS/Azure/GCP).
• Collaboration: Work closely with cross-functional teams (Frontend, Product, QA) to understand requirements and translate them into technical specifications and deliver high-quality features.

Required Skills & Qualifications:

• Programming Expertise: Deep, demonstrable expertise in Node.js and Python.
• Node.js: Strong command of asynchronous programming, event loops, and related frameworks (e.g., Express.js).
• Python: Extensive experience with web frameworks (e.g., Django, Django Rest Framework, Flask).
• API Design: Proven ability to design and implement highly performant and secure RESTful APIs. Experience with GraphQL is a strong advantage.
• Databases: Expert knowledge of both Relational (e.g., PostgreSQL, MySQL) and NoSQL databases (e.g., MongoDB, Redis, Cassandra). Proficiency in query optimization and schema design.
• Cloud & Tools: Experience with cloud computing platforms (e.g., AWS, Azure, or GCP). Proficiency with Docker and Git.
• Testing: Strong experience with unit, integration, and end-to-end testing frameworks.

Soft Skills & Leadership

• Problem-Solving: Excellent analytical and problem-solving skills with a track record of troubleshooting complex production issues.
• Communication: Strong verbal and written communication skills to articulate technical decisions and collaborate effectively with diverse teams.
• Ownership: Proven ability to take ownership of complex projects, drive them to completion, and manage technical debt.

About the company:

Aptroid Consulting (India) Pvt Ltd is a Web Development company focused on helping marketers transforms the customer experience increasing engagement and driving revenue, customer data to inform and drive it in every interaction in real time and with each individual behavior possibly.

About the Role:

We’re looking for a Senior Java & PHP Developer to join our backend engineering team that powers high-throughput, large-scale SaaS platforms — delivering billions of personalized communications and marketing events every month. You’ll work on mission-critical services that drive automation, data intelligence, and real-time campaign delivery across global clients. You’ll play a key role in designing scalable APIs, improving platform performance, and mentoring developers — while working closely with distributed teams aligned to US (EST) time zones. 

Key Responsibilities:

• Architect, design, and develop scalable backend services using Java (Spring Boot, Microservices) and PHP (Laravel/Symfony/custom frameworks).
• Lead system design and architecture reviews, ensuring clean code, maintainability, and adherence to best practices.
• Drive API integrations, microservices deployment, and modernization of legacy components.
• Collaborate with product managers, DevOps, and data engineering teams to deliver high impact features and performance improvements.
• Build, maintain, and monitor data-intensive systems that handle large message/event volumes with high reliability.
• Implement strong observability practices (metrics, tracing, alerting) and contribute to production incident reviews.
• Perform code reviews, mentor junior engineers, and advocate engineering excellence.
• Work collaboratively across global teams during EST business hours for sprint planning, releases, and incident response.

Required Qualifications:

• 6–9 years of professional backend development experience.
• Expert in Java (Spring Boot, REST APIs, concurrency, JVM tuning) and PHP (Laravel/Symfony, Composer, PSR standards)
• Strong experience with MySQL / PostgreSQL, Redis, and NoSQL systems. • Familiarity with AWS services (S3, Lambda, ECS/EKS, CloudWatch) and CI/CD pipelines (Jenkins, GitLab, GitHub Actions).
• Hands-on experience in scalable, distributed architectures and performance optimization.
• Strong debugging, profiling, and system performance tuning capabilities.
• Proven ability to deliver reliable, secure, and production-ready code in fast-paced agile environments.
• Excellent communication skills; able to coordinate with global teams across time zones.

Preferred Skills:

• Exposure to Kafka, RabbitMQ, or other event-driven systems.
• Familiarity with containerization (Docker) and orchestration (Kubernetes).
• Experience integrating with third-party APIs and external SDKs.
• Prior experience in AdTech, Martech, or high-volume SaaS platforms (similar to Sailthru/Zeta Global ecosystem).
• Knowledge of Python/Go for cross-service utilities or internal tooling is a plus.

What We Offer:

• Opportunity to work on high-scale enterprise systems with real-world impact.
• Exposure to global engineering practices and advanced cloud architectures.
• Collaborative culture with technical ownership and innovation freedom.
• Competitive compensation aligned with experience and global standards.

Required Skills & Experience

• Must have 8+ years relevant experience in Java Design Development.
• Extensive experience working on solution design and API design.
• Experience in Java development at an enterprise level (Spring Boot, Java 17+, Spring Security, Microservices, Spring).
• Extensive work experience in monolithic applications using Spring.
• Extensive experience leading API development and integration (REST/JSON).
• Extensive work experience using Apache Camel.
• In-depth technical knowledge of database systems (Oracle, SQL Server).
• Ability to refactor and optimize existing code for performance, readability, and maintainability.
• Experience working with Continuous Delivery/Continuous Integration (CI/CD) pipelines.
• Experience in container platforms (Docker, OpenShift, Kubernetes).
• DevOps knowledge including:
• Configuring continuous integration, deployment, and delivery tools like Jenkins or Codefresh
• Container-based development using Docker, Kubernetes, and OpenShift
• Instrumenting monitoring and logging of applications

Key Responsibilities: 

• Rewrite existing APIs in NodeJS. 
• Remodel the APIs into Micro services-based architecture. 
• Implement a caching layer wherever possible. 
• Optimize the API for high performance and scalability. 
• Write unit tests for API Testing.
• Automate the code testing and deployment process.

Skills Required: 

• At least 2.5 years of experience developing Backends using NodeJS — should be well versed with its asynchronous nature & event loop, and know its quirks and workarounds. 
• Excellent hands-on experience using MySQL or any other SQL Database. 
• Good knowledge of MongoDB or any other NoSQL Database. 
• Good knowledge of Redis, its data types, and their use cases. 
• Experience with graph-based databases like GraphQL and Neo4j. 
• Experience developing and deploying REST APIs. 
• Good knowledge of Unit Testing and available Test Frameworks. 
• Good understanding of advanced JS libraries and frameworks. 
• Experience with Web sockets, Service Workers, and Web Push Notifications. 
• Familiar with NodeJS profiling tools. 
• Proficient understanding of code versioning tools such as Git. 
• Good knowledge of creating and maintaining DevOps infrastructure on cloud platforms. 
• Should be a fast learner and a go-getter — without any fear of trying out new things Preferences. 
• Experience building a large scale social or location-base

• Experience in designing & developing systems/software for large business environments (Java, J2EE).
• Strong design and coding skills in Enterprise Java, REST & SOAP web services, ORM (JPA/Hibernate), Spring, Maven, JMS (ActiveMQ), Caching, XML, JSON.
• Experience with multiple integration technologies / frameworks.
• Must have good experience in Unix/Oracle/SQL.
• Experience in Agile Development, Scrum, and Iterative approaches.
• Experience and exposure to AWS Cloud Services and DevOps mindset and expertise is a plus Experience with Mule or any ESB (Enterprise Service Bus) is a plus.

Vah Vah! is an ed-tech company that offers online makeup courses in micro-batches to students across India to learn from the leading teachers in top cities. We provide holistic education with lots of practical training that makes our students job-ready with not just the base skills but also the soft skills for great customer service. Our teachers have more than 15+ years of experience in training makeup and have certified more than 1000+ students. Vah Vah! is founded by executives with extensive experience running consumer business and mobile games at scale (over 100 million players) at Zynga. Vah Vah! is backed by a leading investment firm.

Website Link: https://vahvah.com/

The Mission

Vah Vah teaches professional makeup to budding makeup artists and influencers through live online classes. We have students from Srinagar, all the way to the Andamans. And experienced teachers who have worked in Bridal Makeup, Ramp Shoots, Film and more. We empower our students to join the workforce as fully trained makeup artists. This is the future of vocational education, and you can help build it.

Our Culture

• Amazing workplace and colleagues to work with
• We have the right mixture of creativity, analytics and hustle to move fast in the right direction.
• You will work with colleagues who don’t take themselves too seriously but move mountains.
• See yourself evolving every month with new problems to solve and new skill to master.
• Work with the smartest engineers so you can learn from them.
• Competitive salary at par with the best in the industry
• Great stock options so you can benefit from the company's growth.
• Immense exposure to new technologies

Responsibilities:

• Compile and analyze data, processes, and codes to troubleshoot problems and identify areas for improvement.
• Collaborating with the front-end developers and other team members to establish objectives and design more functional, cohesive codes to enhance the user experience.
• Participating in continuing education and training to remain current on best practices, learn new programming languages, and better assist other team members. Taking lead on projects, as needed.

Requirements:

• Overall experience of 2-5 years in building backend services using languages like NodeJs, Java etc
• Fluency or understanding of specific languages, such as Java, Node.Js, Python, and operating systems may be required.
• Strong understanding of the web development cycle and programming techniques and tools.
• Focus on efficiency, user experience, and process improvement.
• Strong problem solving and verbal and written communication skills.
• Ability to work independently or with a group.
• Sound knowledge on source control and DevOps

What you get:

• Amazing workplace and colleagues to work with
• Competitive salary at par with the best in the industry
• Immense exposure to new technologies

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.

About Amazon.com

“Many of the problems we face have no textbook solution, and so we-happily-invent new ones.” – Jeff Bezos

Amazon.com – a place where builders can build. We hire the world's brightest minds and offer them an environment in which they can invent and innovate to improve the experience for our customers. A Fortune 100 company based in Seattle, Washington, Amazon is the global leader in e-commerce. Amazon offers everything from books and electronics to apparel and diamond jewelry. We operate sites in Australia, Brazil, Canada, China, France, Germany, India, Italy, Japan, Mexico, Netherlands, Spain, United Kingdom and United States, and maintain dozens of fulfillment centers around the world which encompass more than 26 million square feet.

Technological innovation drives the growth of Amazon, offering our customers more selection, convenient shopping, and low prices. Amazon Web Services provides developers and small to large businesses access to the horizontally scalable state of the art cloud infrastructure like S3, EC2, AMI, CloudFront and SimpleDB, that powers Amazon.com. Developers can build any type of business on Amazon Web Services and scale their application with growing business needs.

We want you to help share and shape our mission to be Earth's most customer-centric company. Amazon's evolution from Web site to e-commerce partner to development platform is driven by the spirit of invention that is part of our DNA. We do this every day by inventing elegant and simple solutions to complex technical and business problems. We're making history and the good news is that we've only just begun.