Java back end developer

Experience: 5-7 years of strong product development experience in building a massively large-scale distributed internet systems and products.
• BS/MS in Computer Science or equivalent from a premier institute Strong development, coding experience in one or more programming languages like OO Programming (Java), Functional/Scripting languages.
• Expertise in Data Structures, Algorithms, Concurrency.
• Expertise in Micro-services Architecture, multi-threading, performance-oriented programming and designing skills
• Strong software design/development experience in building massively large-scale distributed internet systems and products
• Experience of working on Big Data technologies and applications
• Expertise in one or more persistence technologies (Cassandra, Redis, ElasticSearch, RDBMS).
• Superior organization, communication, interpersonal and leadership skills
• Must be a proven performer and team player that enjoy challenging assignments in a high-energy, fast-growing and start-up workplace
• Must be a self-starter who can work well with minimal guidance and in a fluid environment
• Provide good attention to details
• Must be excited by challenges surrounding the development of highly scalable & distributed system for building audience targeting capabilities
• Agility and ability to adapt quickly to changing requirements and scope and priorities

We are looking for a Java Developer with experience in building high-performing, scalable, enterprise-grade applications, who can use Data Structures & Algorithms to make complex codes, and with a depth understanding of Java fundamentals.

Job Location: New Delhi

What you’ll do:

• Contribute to all phases of the Software development lifecycle

• Write well-designed testable, efficient code and complex code with Data Structure & Algorithms.

• Ensure designs are in compliance with specifications on Java and RestAPI.

• Prepare and produce releases of software component

• Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review

• A Developer whose job includes writing complex code, testing, and fixing bugs.

• Maintain, design the database and organize collected information.

• A specialized programmer who focuses on multiple types of development.

What you’ll bring:

• 2 year to 5 years of proven hands-on Software Development experience.

• Strong experience in Java programming

• Expertise Knowledge of Data structures and Algorithms

• Proven working experience in a product-based organization (preferred)

• Understanding with Java frameworks Spring boot, Microservices and ORM frameworks.

• Must have the experience to design and build scalable REST APIs.

• Object-oriented analysis and design using common design patterns.

About Embibe
At Embibe, we have just one mission - to truly personalize education. Because every child deserves it. This has led us to embark on this noblest of journeys to deliver life and learning outcomes for every student! Rooted in consumer behavior, we are leveraging AI and Data Science to deliver personalized achievement journeys for every student.
We are a tribe of intellectually fierce people from diverse backgrounds, focused on building cutting-edge products that empower everyone in the education ecosystem - students, teachers, educational institutes and parents. We enable a deeper understanding of student behavior, their strengths and weaknesses through analysis at a granular level. It is this shared vision of democratizing and personalizing education that unites us all.
Embibe is powered by AI and data science algorithms, using these contents being recommended across platforms and millions of learning outcomes delivered to students. Since its inception, millions of students have used the imbibe platform for learning concepts and outcomes. Academic users have spent 52mins on average with an average of 3 sessions daily. Embibe has been launched for 12 languages across India with support for 361 Exams (English), and 120 Exams (Hindi) for K6-K12 having 22.6L+ Qs and 58k+ Tests, 29k videos, 50k+ 3D assets. Embibe is the world's largest live online public sector implementation in edtech for test preparation, NTA app which is powered by Embibe has 3.1Mn+ downloads, and 14.3Mn hours spent by users with total 13.4Mn sessions and 1.64Bn attempts.SchoolApp is currently being used by 1000s of schools across India and we are planning to scale it to 100Mn students with 1Mn schools with 10Mn teachers in the period of the next 3yrs.
Prerequisite
We are looking for a Software Engineer across levels who have ever contributed to any large-scale systems be it content platform e.g. Quora/Medium, streaming platform e.g. Netflix or Hotstar, activity log system e.g. Twitter feeds or payment systems like Razorpay to name a few. I/O, Read-Writes, DB connections, Distributed Locking, Memory, Bandwidth, High Throughput, Low Latency and minimal CPU cycles excite you!! You are deep thinkers and can bring ideas to the table, before starting writing the code!!
Interested? We'd love to hear from you.
Who are you?
● 2-14yrs years of relevant large-scale product company experience ideally in a fast-moving B2C/B2B environment.
● Programming. Proficiency in object-oriented and multi-threaded programming in at least one of the following languages: Java, Python,React.js, Node.js, Next.js, PHP, Golang etc.
● Deep understanding & experience of high-performance web-scale & real-time response systems, and large scale distributed systems.
● CS Fundamentals – exposure to a wide variety of problem spaces, Good in Data Structures and Algorithms Design, Problem Solving.
● Open source contributors and can do quick POC of technologies will catch our eyes.
● Expertise in designing, implementing and operating distributed Systems architectures and concepts, especially on public cloud infrastructure (AWS/Azure)
● Demonstrated expertise in applying systems patterns (e.g., Client-server, N-tier, Master/Slave, MVC) and API constructions (e.g., Swagger, OpenAPI).
● Experience in a high-availability 24/7 environment (cloud platforms are a plus). Expertise should include several of the following:
○ High-performance,up-time (99.999%) and self-recoverable systems.
○ Control, orchestration and automation platforms leveraging containers or VMs. ○ RPC frameworks (e.g., Protobuf/gRPC, Thrift, Bond)
● Experience with one or more Data Stores like (MySql, Postgres ) and NoSQL DataStores ( Mongo, Cassandra, Scylladb, Hbase, Redis, Aerospike etc.).
● Experience with Agile software development, TDD, and Continuous Integration. ● Experience in building Web/RESTFul/GraphQL services.
● Sound knowledge of *Nix, ORM(Hibernate, JPA), Spring ecosystem, Messaging platforms like Kafka/RMQ, build framework like Maven/Gradle etc.
● Very strong system design and object-oriented skills with a nifty ability to craft clean interfaces and operate at the right levels of abstraction.
● Solid coding skills with the ability to drive teams through massive refactoring exercises & improve coding standards across large code bases.
● Deep knowledge, understanding & experience of working with a large variety of multi-tier architectures. Awareness of pitfalls & use cases for a large variety of solutions. ● Exposure to complete product development cycles – from inception to production to scaling up, supporting new requirements, and re-architectures.
● Having experience building web infrastructure in cloud environments (such as AWS or Azure/GCP) is a plus. You understand and are always excited about learning new e.g.docker, Kubernetes.
● Education. M.Tech/M.Eng in Computer Science/Engineering or B.Tech/B.E in the same disciplines with equivalent years of experience would be a plus.
We'd particularly love it if:
● You’re a steward for engineering quality, reliability, scalability, availability, maintainability, flexibility habits and mindset in the organization under your purview, You know SOLID,12 factor App and Design Principles which you can apply or help the team in applying as needed. You can assure that our architectures are consistent with industry best practices. ● Version control tools like Git, SVN etc are good to have.
● Gather, understand, and prioritize requirements, research potential solutions, rapidly build prototypes, and distill and communicate what was learned, expected risks, resources & security concerns.
● Mentoring more junior engineers to instill engineering best practices and driving high standards in documentation, code reviews, design reviews, architecture discussions and strategy roadmap development.
● Actively participate in development along with team members - creating modules & systems that can then be treated as a working reflection of the best practices.
● Set the vision of the domain architecture and technology stack for technology in your organization, You understand LLD and HLD.
● Be an evangelist for technology - drive a culture of curiosity and active debate around technology in your organization.
● Experiment with new & relevant technologies and tools, and drive adoption while measuring yourself on the impact you are able to create.
Note: We just use degrees to measure the Temperature!!

SSE Backend
Responsibilities:
Drives technology stack choices for treebo tech teams.
Comfortable working in fuzzy environments and changing requirements.
Act as a technical mentor to your team.

Requirements:
Effective problem solving skills in complex & large scale environment.
Exposure in Distributed systems and micro services.
Exposure to a wide variety of problem spaces, technologies.
Very Strong System design, separation of concerns and OO design skills
with ability to craft crisp interfaces and communicate at the right
levels of abstraction.
His / her code should be model code for the rest of the engineering
organisation.
Experience working with web-scale / user path systems.
Experience working with large scale persistent systems including NoSQL
databases.
3 - 6 years of overall experience.
B Tech or higher in Computer Science or equivalent required.

*) 7+ years of strong experience in Java/J2EE technologies (Core Java, Spring, Springboot, Hibernate, JPA, Microservices)
*) Experience with working on Java 8.0 and its emerging road map for 11
*) Hands on experience in Springboot and good knowledge of MySQL, MongoDB
*) Hands on experience in working with Angular 6 and above. Experience working with product management and UI/UX designers having knowledge of advanced Javascript, JQuery
*) Working knowledge on components, modules, data/event bindings, templates, using and creating directives, writing routes, services, forms and models
*) Solid understanding of the full frontend and backend development life cycle
*) Strong experience in Spring Framework (Spring MVC, Spring security, Spring data, OAuth)
*) Experience with Webservices (SOAP and REST) and API integration. Good knowledge of JSON and Swagger and Postman is required
*) Experience with web application servers like Tomcat, Jetty, JBoss. Knowledge of Kafka with MQTT would be an added advantage
*) Experience with TDD, code testability standards, JUnit
*) Experience in managing configurations and deploying and hosting applications in AWS
*) Experience with DevOps tools like Git, Maven, SourceTree, Jenkins, Docker and CICD model of development
*) Good experience of OOPS, algorithms, data structures, multi-threading, design patterns and industry best practices
*) Must have good understanding in SOLID principles and why design principles are used.
*) Experience with Eclipse/IntelliJ and VS Code

About Instamojo Instamojo is India's fastest growing on-demand payments and e-commerce platform that enables over 6,00,000 SMEs to build, manage and grow their business online. A trusted partner for SMEs in India, Instamojo's insightful tools are poised to enable small entrepreneurs to minimize costs and grow their business. It is a one-stop shop for entrepreneurs that caters to their diverse business needs by leveraging technology, data and design. Instamojo has acquired 10% of digitally active MSMEs and powers 1 out of 100 to control 30% of their annual turnover through its flagship link-payments and online store products. In addition to link-based payments, Instamojo plans to offer e-commerce enabling services, cataloguing, compliance, lending, logistics, promotions via third-party providers. Founded in 2012 by Sampad Swain, Akash Gehani and Aditya Sengupta, Instamojo raised Pre-Series B funding from AnyPay a Japanese payments firm. In November 2014, the company raised USD 2.6 million in Series A funding from Kalaari Capital, Blume Ventures, 500Startups and others. Prior to this, it had raised approximately USD 500,000 from 500 Startups, Blume Ventures and angel investors Rajan Anandan, Sunil Kalra, Dave McClure, Rob de Heus, Thijs Gitmans among others. Instamojo at a glance:  Caters to 6,00,000 SMEs.  Instamojo has acquired 10% of the digitally-active SMEs in India and controls 30% of their annual turnover. It aims to extend its wallet share to 70% by 2019.  The company aims to increase its target merchant base 400% and target 1 MN small and medium businesses by 2018.  Instamojo turned EBITDA positive in July 2017 and has witnessed a 10-15% month-on-month growth.  With demonetization, Instamojo added 3000 SMEs daily to the platform, which was 15x higher than daily average.  Digital Transactions performed on Instamojo's platform have grown by over 178 % in the last year alone.
We are building consumer internet space, payment processing, e-commerce and/or enterprise. SAAS products. Undergraduate (or higher) degree in computer science/engineering. You have an excellent grasp over theoretical and applied computer science.
Job Description
Responsibilities  You can take responsibility of large sized projects.  You can take full responsibility of one or more core modules and/or technical verticals / libraries / frameworks / components.  This will include design and architecture, evaluating and deciding which framework/language/data store/tools to us, preparing roadmaps and timely delivery.  You understand the business impact of your decisions.  You will review code and ensure that implementations are testable, performant, scalable, documented and secure.  You will work closely with product, design, revenue, platform and growth teams.  You can take responsibility of large sized projects involving inter-departmental stakeholders.  You can take full responsibility of one or more core modules and/or technical verticals / libraries / frameworks / components.  Payment processing framework capable of supporting multiple payment methods (cards, netbanking, UPI, wallets, etc.) with one or more payment method supported across multiple payment gateways.  This will include design and architecture, evaluating and deciding which framework/language/data store/tools to us, preparing roadmaps and timely delivery.  You will drive engineering best practices, recruit other engineers, lead and manage teams, conduct performance reviews and mentor other engineers.  You will review code and ensure that implementations are testable, performant, scalable, documented and secure.  You will work closely with product, design, revenue, platform and growth teams.
Requirements  3-5 Years of Experience in software engineering.
 5-10 years of industry experience in software engineering building consumer internet space, payment processing, e-commerce and/or enterprise SAAS products.  Bachelor's Degree in Computer Science or related field, or 3+ years relevant work experience.  Undergraduate (or higher) degree in computer science/engineering.  You have an excellent grasp over theoretical and applied computer science.  You have excellent problem solving and analytical skills.  You should be able to identify systemic issues, performance bottlenecks and design/architect improvements.  Experience with working on PCI compliant infrastructure.  You should be able to build at this engineering level Store builder (products with multi-level variants (colour, size, etc.), SKUs, discounts) and shopping cart.  Highly concurrent double entry accounting system.  You have excellent problem solving and analytical skills.  You should be able to identify systemic issues, performance bottlenecks and design/architect improvements.  Good hold on data structures and algorithms.  Strong object-oriented design skills, and an uncanny ability to design intuitive modules and class-level interface.
Desired Skills and Experience Python, Golang, Java, Ruby on Rails, Django

Job Duties : 1. Optimising existing Stack & Architecture 2. Has Expertise in handling Backend Microservices Architecture, High-Concurrency, Multi-Thread, Server-side system. 3. Develop efficient, reusable, reliable & Scalable Code. 4. Has the Hustle and Ownership approach. Also, Has the ability to lead technical team. 5. Implementation of security and Data storage solution. Requirements : 1. Has Expertise of 0-2 years on Python and related frameworks. 2. Has Experience with micro-services architecture 3. Has Experience with relational DBs and Linux environments 4. Has Expertise in development and use of REST/3P APIs. 5. Has a great understanding of SQL and NoSQL worlds. We use both Firebase as well as PostgreSQL. 6. Has Experience in handling AWS 7. Has Experience in payment gateway implementation. 8. Has Experience building high-traffic systems 9. Knowledge in Node.js is a plus. 10. Has Experience of leading a team/project/startup in tech role.