Lead Java Developer

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

Strong Backend Engineer Profiles

Mandatory (Experience 1) – Must have 2+ years of hands-on Backend Engineering experience building production-grade systems in a B2B SaaS or product environment

Mandatory (Experience 2) – Must have strong backend development experience using at least one backend framework such as FastAPI / Django (Python), Spring (Java), or Express (Node.js)

Mandatory (Experience 3) – Must have a solid understanding of backend fundamentals, including API development, service-oriented architecture, data structures, algorithms, and clean coding practices

Mandatory (Experience 4) – Must have strong experience working with databases (SQL and/or NoSQL), including efficient data modeling and query optimization

Mandatory (Experience 5) – Must have experience designing, building, and maintaining APIs and backend services, including integrations with external systems (CRMs, payment gateways, ERPs, data platforms, etc.)

Mandatory (Experience 6) – Must have experience working in cloud-based environments (AWS / GCP / Azure) and be familiar with Git-based collaborative development workflows

Mandatory (Domain) – Experience with financial systems, billing platforms, fintech applications, or SaaS revenue-related workflows is highly preferred

Mandatory (Domain) – Experience with financial systems, billing platforms, or fintech applications is highly preferred (fintech background is a strong plus)

Mandatory (Company) – Must have worked in product companies / startups, preferably Series A to Series D

• Experience in Core Java, CXF, Spring.
• Experience in spring boot, microservices.
• Extensive experience in developing enterprise-scale n-tier applications for the financial domain. 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, preferably Sybase database
• Good knowledge of multi-threading and high volume server side development
• Experience in sales and trading platforms in investment banking/capital markets
• Basic working knowledge of Unix/Linux
• Excellent problem solving and coding skills in Java
• Strong interpersonal, communication and analytical skills.
• Should have the ability to express their design ideas and thoughts.

• Executes the development, Maintenance, and enhancements of varying complexity levels across platform systems
• Translates the Business Requirements and specifications into related solutions designs to understand business needs and functional specifications
• Evaluates project deliverables to ensure they meet the specifications and architectural standards
• Write and review technical documents, including design, developments, and code review
• Provide technical support to team
• Work independently and handle product responsibilities with stakeholders and good communication skills
• Good understanding of performance and security aspects of software development
• Working experience in Agile Software Methodology (Scrum and Kanban)

• 6+ years of experience in Software development using Java and J2EE technologies
• Experience in designing front end interfaces using HTML, CSS, Javascript, iQuery, AJAX
• Experience in Build tools like Maven
• Strong hands-on experience in developing microservices using Springboot
• Strong hands-on experience in Spring Framework such as Spring MVC, IDC, AOP and Spring JDBC
• Experience in Core Java, Multi-threading, OOPs, Collections and servlets
• Unit and integration testing using Junit
• Experience in databases like MySQL, DB2 and Oracle
• Strong design skills and also experience in working with Design patterns to solve problems
• Good to have GCP, AWS, Azure public cloud platforms
  
  

Must have experience on Java, Spring MVC / Boot, Hibernate / MyBatis 

- Must have experience on building large scale application 

- Must have experience on RESTful Web-Services 

- Must be good in problem solving, Data structures and Algorithms. 

- Strong understanding of Web Architectures, E-commerce solutions 

- Strong understanding of any MySql / Postgresql 

- Strong understanding of any Redis / Memcached / Mongodb / Elasticsearch 

- Hands-on experience on GCP / AWS would be an added advantage 

- Hands-on experience on Kubernetes / Docker would be an added advantage 

- Basic knowledge of version control system like Git / Mercurial / Bitbucket 

- Writes well managed and clean codes 

JOB DESCRIPTION:

 Roles and Responsibility :

• Lead and build the team in development
• Participate in the technical design of projects we made for our Clients
• Supervise and write efficient and reliable code; use best practices with our team
• Organize and participate code reviews
• Setup unit and integration tests
• Architecture and design of reusable server components
• Developing high performing REST APIs for application functionality
• Develop and maintain scalable server architecture serving millions of users every day.
•  

Must Have Skill Sets :

• Should have 5+ years of experience in Mobile/web server and application development
• Mandatory: Strong development skills in Python ,Node.js, Typescript, Django Rest Framework, Linux, MongoDB
• Experience with client technologies like JavaScript, CSS3, HTML5, bootstrap, Angulars, React, Android App a plus
• Strong knowledge of data structures and computer fundamentals
• An ability to refract and understand large and separate code bases
• Experience with third-party libraries and APIs
• Forward-looking on potential technology choices
• Experience in building highly scalable, reliable systems
• Team handling experience.
  
  
  

About Mobiquity 

Founded in 2011, Mobiquity provides end-to-end omnichannel digital consulting services to leading B2B  and B2C brands (HealthCare, Banking, IoT, Big Data, and cutting edge Web & Mobile Applications). With  over 750 employees spread across the USA, Europe, and India, 40 different nationalities combined; we  create compelling digital experiences to help our clients create the best human-centric products. Our key  competencies include Strategy, Design, Product Engineering, Analytics, and Cloud Services. Each day, 50  million users interact with our solutions. 

Our teams are inspired by technology but it doesn’t rule them. We love to learn, we are curious by nature  and driven to make a mark. Working at Mobiquity means that sometimes you’ll be working outside your  comfort zone, and you’ll work with smart people, possibly some that are even smarter than you. We value  people that judge their success by the success of the team and the happiness of customers. 

We’re also proud to be an Amazon Web Services (AWS) Premier Consulting Partner. What you’ll be doing 

• Work across multiple projects (sometimes also at customer side)
• Be a good team player
• Involve fully in hands-on development: using Java as the main programming language, plus Spring, Hibernate and other open source technologies
• Coach less experienced team members
• Know the importance of code quality and can apply properly the methodologies, such as TDD, Agile..

What it takes to excel in this role 

• Java 11, JUnit, Spring, Hibernate, JDBC, Restful Services (Jersey or Spring MVC), ActiveMQ• Experience with at least one or two databases, such as MySql, PostgreSQL or Oracle• Experience with Microservices
• Test frameworks for TDD
• Fluent in English

Bonus 

• Experience with integration frameworks such as Apache Camel or Mule
• Test frameworks for BDD
• Docker and Kubernetes
• Experience with Software Security
• NoSql Databases, such as Redis or Cassandra
• Experience with AWS

And if you have a passion for technology, then we’re looking for you!

JD - Senior Dev with more than 5 years relevant experience

1. Working experience on web development using Python/Django
2. Comfortable with using Django framework.
3. Understanding of web servers
4. Knowledge in PostgreSQL, MySQL, and other database queries
5. Experience in using Redis cache.
6. Understanding of web technologies
7. Experience in REST API development using Django.
8. Strong hold on Apache
9. Integration of data storage solutions
10. Able to integrate multiple data sources and databases into one system
11. Understanding of JavaScript, and front-end JS frameworks like VueJS, React JS and Angular JS
12. Good communication skill
13. .net/.NET core will be an added advantage

• Build large scale enterprise applications.
• Responsible for providing deep technical expertise in designing and delivering end to end high performance, scalable & flexible solutions using Java and Open Stack technologies including Mobility/Responsive Web apps, APIs, application & data Integration, scalable databases, DevOps, Cloud Computing.
• He/ She would be also responsible to experiment, explore and demonstrate application of new technologies by means of conducting quick prototypes to solve business problems. Work with the direction from Solution Architect/ Enterprise Architect and co-create solutions with rest of the IT delivery teams