Backend Developer - Python/Java/Performance Tuning

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 startup 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)

7+ years of experience in Python Development

Good experience in Microservices and APIs development.

Must have exposure to large scale data

Good to have Gen AI experience

Code versioning and collaboration. (Git)

Knowledge for Libraries for extracting data from websites.

Knowledge of SQL and NoSQL databases

Familiarity with RESTful APIs

Familiarity with Cloud (Azure /AWS) technologies

About Wissen Technology:

• The Wissen Group was founded in the year 2000. Wissen Technology, a part of Wissen Group, was established in the year 2015.

• Wissen Technology is a specialized technology company that delivers high-end consulting for organizations in the Banking & Finance, Telecom, and Healthcare domains. We help clients build world class products.

• Our workforce consists of 550+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like Wharton, MIT, IITs, IIMs, and NITs and with rich work experience in some of the biggest companies in the world.

• Wissen Technology has grown its revenues by 400% in these five years without any external funding or investments.

• Globally present with offices US, India, UK, Australia, Mexico, and Canada.

• We offer an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation.

• Wissen Technology has been certified as a Great Place to Work®.

• Wissen Technology has been voted as the Top 20 AI/ML vendor by CIO Insider in 2020.

• Over the years, Wissen Group has successfully delivered $650 million worth of projects for more than 20 of the Fortune 500 companies.

We have served client across sectors like Banking, Telecom, Healthcare, Manufacturing, and Energy. They include likes of Morgan Stanley, MSCI, StateStreet, Flipkart, Swiggy, Trafigura, GE to name a few.

Website : www.wissen.com

Job Title: Python Developer (Full Time)

Location: Hyderabad (Onsite)

Interview: Virtual and Face to Face Interview (Last round)

Experience Required: 4 + Years  

Working Days: 5 Days

About the Role

We are seeking a highly skilled Lead Python Developer with a strong background in building scalable and secure applications. The ideal candidate will have hands-on expertise in Python frameworks, API integrations, and modern application architectures. This role requires a tech leader who can balance innovation, performance, and compliance while driving successful project delivery.

Key Responsibilities

1. Application Development

• Architect and develop robust, high-performance applications using Django, Flask, and FastAPI.

1. API Integration

• Design and implement seamless integration with third-party APIs (including travel-related APIs, payment gateways, and external service providers).

1. Data Management

• Develop and optimize ETL pipelines for structured and unstructured data using data lakes and distributed storage solutions.

1. Microservices Architecture

• Build modular, scalable applications using microservices principles for independent deployment and high availability.

1. Performance Optimization

• Enhance application performance through load balancing, caching, and query optimization to deliver superior user experiences.

1. Security & Compliance

• Apply secure coding practices, implement data encryption, and ensure compliance with industry security and privacy standards (e.g., PCI DSS, GDPR).

1. Automation & Deployment

• Utilize CI/CD pipelines, Docker/Kubernetes, and monitoring tools for automated testing, deployment, and production monitoring.

1. Collaboration

• Partner with front-end developers, product managers, and stakeholders to deliver user-centric, business-aligned solutions.

Requirements

Education

• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field.

Technical Expertise

• 4+ years of hands-on experience with Python frameworks (Django, Flask, FastAPI).
• Proficiency in RESTful APIs, GraphQL, and asynchronous programming.
• Strong knowledge of SQL/NoSQL databases (PostgreSQL, MongoDB) and big data tools (Spark, Kafka).
• Familiarity with Kibana, Grafana, Prometheus for monitoring and visualization.
• Experience with AWS, Azure, or Google Cloud, containerization (Docker, Kubernetes), and CI/CD tools (Jenkins, GitLab CI).
• Working knowledge of testing tools: PyTest, Selenium, SonarQube.
• Experience with API integrations, booking flows, and payment gateway integrations (travel domain knowledge is a plus, but not mandatory).

Soft Skills

• Strong problem-solving and analytical skills.
• Excellent communication, presentation, and teamwork abilities.
• Proactive, ownership-driven mindset with the ability to perform under pressure.

Company Overview

MedExpert, Chennai is a pioneering healthcare consulting firm specializing in US Medical Billing and Revenue Cycle Management (RCM) solutions tailored for healthcare providers and Emergency Medical Services (EMS) organizations. Since its inception in 2023, MedExpert has rapidly grown into a team of over 950 experts passionate about transforming the healthcare industry through technology-driven solutions.

With a focus on client success and operational efficiency, we empower healthcare providers to streamline billing processes, optimize revenue, and maintain their focus on quality patient care.

We pride ourselves on fostering a collaborative and growth-oriented work environment where every team member is empowered to contribute to projects that shape the future. Our culture champions Agile principles and is dedicated to high performance, continuous learning, and technological advancement.

We are seeking a dedicated and experienced Backend Developer to join our team. This role is integral to helping our development teams maintain agility, productivity, and the highest standards in delivering solutions to meet our clients’ evolving needs.

About the role

We are seeking a talented Senior PHP Developer with 8+ years of overall experience to join our growing team. The ideal candidate must be a senior full-stack developer with 8+ years of PHP experience, strong skills in JavaScript, design patterns, AWS, and microservices.

They must excel in Agile environments, RESTful API development, DevOps, and have strong communication skills, problem-solving abilities, and a passion for learning emerging technologies.

Roles and Responsibilities

• Join our agile team and drive the development of robust and scalable web applications.
• Work closely with developers, technical leads, solution architects, QA, and product owners to deliver high-quality solutions in a dynamic environment.
• Lead the design and development of complex backend systems using PHP and related frameworks.
• Architect and implement RESTful APIs and Web Services.
• Develop and deploy applications using AWS cloud technologies and infrastructure.
• Ensure code quality through unit testing frameworks and adherence to best practices.
• Contribute to DevOps pipelines and promote continuous integration and delivery.
• Participate in code reviews, mentor junior developers, and contribute to technical discussions.

Required Skills and Qualifications

Technical Skills

• 8+ years of professional experience with PHP programming and proficiency with PHP Frameworks (e.g., Yii).
• Strong skills in HTML, CSS, JavaScript, AJAX, with hands-on experience in libraries like jQuery, Bootstrap.
• 8+ years of experience in software design with strong knowledge of design patterns and best practices.
• Proficiency in SOLID principles, Dependency Injection (DI), Repository Pattern, Unit of Work Pattern, CQRS, Microservices Architecture, Event Sourcing, DDD Patterns, Singleton, MVC, MVVM.
• Proficiency with JavaScript frameworks (Angular, React, Vue).
• Solid experience with DBMSs (MS SQL Server, MySQL, PostgreSQL) and strong SQL skills.
• Strong experience with AWS cloud and event-driven architectures.
• Proficiency with Git and version control.
• Experience with Docker containers.
• Working knowledge of JIRA/Confluence or similar tools.
• At least 8+ years of development experience in C# and .NET technologies (.NET Core & Framework).

Development Stack

• JavaScript, PHP, Visual Studio Code/PhpStorm
• DBMSs: MS SQL Server, MySQL, PostgreSQL
• JIRA, Confluence, Git
• HTML, CSS, JavaScript, JSON, XML
• JavaScript & PHP Frameworks
• Docker & Unit testing frameworks

Non-Functional Requirements

• Solid understanding of SLA, uptime, performance optimization, security, cloud infrastructure, CI/CD practices.

Soft Skills

• Excellent problem-solving skills.
• Strong written and verbal communication skills.

Preferred Skills and Qualifications

• Hands-on experience with JavaScript data grids like AG Grid, Angular, PHP, and Yii frameworks.
• Working knowledge of HTML, CSS, JavaScript, JSON, XML, JavaScript frameworks, and PHP frameworks.
• Strong experience with Entity Framework programming.

Why Join Us?

At MedExpert, you will have the opportunity to make an impact by shaping Agile practices and driving project success. We provide an environment where innovation, collaboration, and personal growth are at the forefront.

Joining MedExpert Billing and Consulting gives you the chance to contribute meaningfully to a positive and supportive work environment, where your expertise will make a difference not just within our team but across the EMS industry.

• Ruby

• Rails framework

• MySQL

• API development

• Design Patterns

Develop, test, and maintain all APIs

• Manage and maintain SQL and No-SQL tables, data, and stored procedures within all databases

• 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 code to enhance the user experience and support analytical products

• Troubleshoot and diagnose production issues

Role: Backend Developer-SDE2

• 3-5 years of exp into

Responsibilities:

• Work on the development backend systems for our first product.
• Build reliable, secure and performant backend systems.
• Drive test coverage and continuous delivery automation within the team.

Requirements:

• 3-4 years of software development experience.
• Strong computer science fundamentals.
• Good knowledge of Java ecosystem.
• Can write code that is readable, maintainable and performant.
• Good understanding of relational databases, transactions, entity-relationship modeling.
• Comfortable writing multi-threaded programs.