Lead Java Developer (Backend)

About the Role

We’re looking for an Elixir Developer who is passionate about building scalable, high performance backend systems. You’ll work closely with our engineering team to design, develop, and maintain reliable applications that power mission-critical systems.

Key Responsibilities

• Develop and maintain backend services using Elixir and Phoenix framework.

• Build scalable, fault-tolerant, and distributed systems.

• Integrate APIs, databases, and message queues for real-time applications.

• Optimize system performance and ensure low latency and high throughput.

• Collaborate with frontend, DevOps, and product teams to deliver seamless solutions.

• Write clean, maintainable, and testable code with proper documentation.

• Participate in code reviews, architectural discussions, and deployment automation.

Required Skills & Experience

• 2–4 years of hands-on experience in Elixir (or strong functional programming background).

• Experience with Phoenix, Ecto, and RESTful API development.

• Solid understanding of OTP (Open Telecom Platform) concepts like GenServer, Supervisors, etc.

• Proficiency in PostgreSQL, Redis, or similar databases.

• Familiarity with Docker, Kubernetes, or cloud platforms (AWS/GCP/Azure).

• Understanding of CI/CD pipelines, version control (Git), and agile development.

Good to Have

• Experience with microservices architecture or real-time data systems.

• Knowledge of GraphQL, LiveView, or PubSub.

• Exposure to performance profiling, observability, or monitoring tools.

Senior Python Django Developer 

Experience: Back-end development: 6 years (Required)

Location:  Bangalore/ Bhopal

Job Description:

We are looking for a highly skilled Senior Python Django Developer with extensive experience in building and scaling financial or payments-based applications. The ideal candidate has a deep understanding of system design, architecture patterns, and testing best practices, along with a strong grasp of the start-up environment.

This role requires a balance of hands-on coding, architectural design, and collaboration across teams to deliver robust and scalable financial products.

Responsibilities:

• Design and develop scalable, secure, and high-performance applications using Python (Django framework).
• Architect system components, define database schemas, and optimize backend services for speed and efficiency.
• Lead and implement design patterns and software architecture best practices.
• Ensure code quality through comprehensive unit testing, integration testing, and participation in code reviews.
• Collaborate closely with Product, DevOps, QA, and Frontend teams to build seamless end-to-end solutions.
• Drive performance improvements, monitor system health, and troubleshoot production issues.
• Apply domain knowledge in payments and finance, including transaction processing, reconciliation, settlements, wallets, UPI, etc.
• Contribute to technical decision-making and mentor junior developers.

Requirements:

• 6 to 10 years of professional backend development experience with Python and Django.
• Strong background in payments/financial systems or FinTech applications.
• Proven experience in designing software architecture in a microservices or modular monolith environment.
• Experience working in fast-paced startup environments with agile practices.
• Proficiency in RESTful APIs, SQL (PostgreSQL/MySQL), NoSQL (MongoDB/Redis).
• Solid understanding of Docker, CI/CD pipelines, and cloud platforms (AWS/GCP/Azure).
• Hands-on experience with test-driven development (TDD) and frameworks like pytest, unittest, or factory_boy.
• Familiarity with security best practices in financial applications (PCI compliance, data encryption, etc.).

Preferred Skills:

• Exposure to event-driven architecture (Celery, Kafka, RabbitMQ).
• Experience integrating with third-party payment gateways, banking APIs, or financial instruments.
• Understanding of DevOps and monitoring tools (Prometheus, ELK, Grafana).
• Contributions to open-source or personal finance-related projects.

Job Types: Full-time, Permanent

Schedule:

• Day shift

Supplemental Pay:

• Performance bonus
• Yearly bonus

Ability to commute/relocate:

• JP Nagar, 5th Phase, Bangalore, Karnataka or Indrapuri, Bhopal, Madhya Pradesh: Reliably commute or willing to relocate with an employer-provided relocation package (Preferred)

TAPPP is leading the charge in bringing premium digital entertainment content & live sports to global consumers via its prepaid platform. TAPPP is available across platforms via the Web, Mobile and Tablets. Building out this brand presents significant product and engineering challenges. At the centre of solving those challenges is the TAPPP Product Engineering team which is responsible for the TAPPP product end to end.

We are looking for a coding enthusiast who love working with code and developing software systems.

You will be a part of the core product development team that is responsible for building different components of the TAPPP platform. You will be responsible for designing, coding, reviewing, testing, bug-fixing different modules of the software product that needs to work seamlessly across different environments.

The organization is flat, process is minimal, individual responsibility is big, and there is an emphasis on keeping non-productive influences out of the everyday technical decision making process. Upholding these philosophies will be imperative as we execute our aggressive plan of global expansion over the next 2 years. The position is based in Mumbai, India.

Here is what we are looking for:

• Deep product development experience and sound understanding into these technologies

• Java/J2EE

• Spring

• Hibernate

• RESTful API's

• MySQL

• Tomcat 7

• Exposure on Grails & Amazon AWS will be a plus point

• Strong independent contributor

• An unquenchable desire to learn, attention to detail with a can-do attitude

• Comfortable working in a start-up environment

EXPERIENCE: 7 to 9 years in Java 2 Enterprise server side development. Must have applied knowledge of design patterns needed for building REST APIs and services for performance and scale.

SKILLS:

- Problem Solving and application of Object Oriented principles to development

- REST API development using Java, JAX-RPC,

- Server side development using Java, Spring Boot, Node.js

- Concurrent programming with Java

- Database programming in SQL with Oracle, MySQL or other RDBMs.

- Deployment to AWS and Kubernetes and building with Maven

- Affinity towards server side development

- Ability to understand existing code and re-engineer/re-factor/redesign.

- Written and spoken English communication and articulation.

NICE TO HAVE:

 - Working knowledge of GO Lang and Python scripting

- AWS Certifications

- Working knowledge of Elastic Search based persistence and search

- Secure coding practices

EDUCATION: Bachelor or Master's degree in Computer Science, Software Engineering or Information Technology or related disciplines.

About radix health 

We, http://www.radixhealth.com/">Radix health, Inc are a Healthcare IT solutions provider organization based out of US and India, developing innovative products that are solving some of the challenging problems for US Healthcare around patient access and patient care. We operate at the intersection of Clinical operations, data science and medical practices and we are a bunch of people with solid domain knowledge, technical expertise and eagerness to grow our footprint in the market.

Radix health is listed as one of the top 100 companies transforming US healthcare and we are proud to be associated with several leading medical groups in US. 

Working at radix health

Are you looking for a place where growth opportunities abound, where you'll have the freedom to forge your own path, and where you can feel good about the work you're doing?

We're looking for people who are passionate about improving healthcare, constantly seek to make themselves better, love challenging problems, and never say never.  We honor diversity and creative thought. We are committed to building an environment that challenges you, but where you can also have fun. As a growth-stage startup, we offer competitive compensation packages that reward hard work and long-term growth.

Perks at work

• Chance to work on real life problems in the healthcare industry.
• Culture of trust, empowerment and constructive feedback, Advanced technology stack , knowledge sharing through tech talks, product demos, parties & events.
• Competitive salary, great IT equipment, flexible working times, additional holidays and volunteering time off, free beverages and healthy evening snacks.
• A diverse, fun and open-minded team in a nice office in the centrally located part of Pune.
• Extensive onboarding, mentoring and personal development plan.
• Relocation assistance for outstation candidates.
• Comprehensive insurance benefits covering employees and their families.
• Genuine work/life balance served here. 

Our Recruiting Process:

We aim to reply to all applicants within a few days of receiving your application. Our interview process consists of several stages, each one allowing us to get to know you better, professionally and technically. It is also an opportunity for you to gain a better understanding of our culture and the work we do here at Radix Health.

The stages include:

• CV review
• A little coding/Logical challenge 
• Technical Interview with team
• Interview with VP. 

We value your time and we move fast and provide feedback at every stage of the interview.

If you like being at the place where decision making is quick then you are on the right track

Role :
We are looking for an experienced Java or full-stack developer who is passionate about developing solutions that improve healthcare. The ideal candidate will have at least 4 years of experience building large-scale web applications. 

You will be expected to define/scope feature-sets and develop new functions. You will be a part of the team that is focussed on our one of many industry leading software solutions, designing scalable/maintainable object oriented architecture and producing market leading, self-testable deliverables. 

You are expected to be a technology enthusiast, who likes to think out of the box, embraces new technology alternatives, has a creative mind and is a go-getter.

Qualifications:

• Education : BE/MS/M. Tech/MCS/MCS with excellent records
• Server side :  Java/J2EE, REST API development, RESTful web services, Spring Boot framework, JAX-RS APIs

• Concepts : Strong understanding of Data Structures, Concurrency, Mult-threading, Design patterns, Java packages, Garbage collection, collections, JVM, JDBC

• ORM : Mybatis, Hibernate
• Unit testing : JUNIT, TestNG, Mockito 
• Build : Maven, Gradle
• CI/CD : GIT, Devops practices, Jenkins, containerization using Docker
• Databases : SQL, No-SQL, RDS, PostgreSQL, MySQL

• Cloud :AWS, EC2, ES3, ECR etc.

• APM:  ELK, Grafana

Skills:

• At least 4 years of SAAS software development experience.
• Experience in cloud computing application implementations on AWS is a MUST!
• Excellent understanding of microservices architecture, design patterns, and standard methodologies with an eye towards scale, automation, resiliency, and high availability
• Experience with build-time dependency management (e.g. Ant, Maven); unit testing and code-coverage tools; test automation techniques and tools; and build automation tools (e.g. Jenkins,) tools is required. 
• Strong understanding of Java is expected 
• Good understanding of architectural principles involved in SaaS and multi-tenant platforms. 
• Strong interpersonal, influencing, collaboration and negotiation skills