
About Us:
Tradelab Technologies Pvt Ltd is not for those seeking comfort—we are for those hungry to make a mark in the trading and fintech industry. If you are looking for just another backend role, this isn’t it. We want risk-takers, relentless learners, and those who find joy in pushing their limits every day. If you thrive in high-stakes environments and have a deep passion for performance driven backend systems, we want you.
• We’re looking for a Backend Developer (Python) with a strong foundation in backend technologies and a deep interest in scalable, low-latency systems.
• You should have 3–4 years of experience in Python-based development and be eager to solve complex performance and scalability challenges in trading and fintech applications.
• You measure success by your own growth, not external validation.
• You thrive on challenges, not on perks or financial rewards.
• Taking calculated risks excites you—you’re here to build, break, and learn.
• You don’t clock in for a paycheck; you clock in to outperform yourself in a high-frequency trading
environment.
• You understand the stakes—milliseconds can make or break trades, and precision is everything.
• Develop and maintain scalable backend systems using Python.
• Design and implement REST APIs and socket-based communication.
• Optimize code for speed, performance, and reliability.
• Collaborate with frontend teams to integrate server-side logic.
• Work with RabbitMQ, Kafka, Redis, and Elasticsearch for robust backend design.
• Build fault-tolerant, multi-producer/consumer systems.
What We Expect:
• 3–4 years of experience in Python and backend development.
• Strong understanding of REST APIs, sockets, and network protocols (TCP/UDP/HTTP).
• Experience with RabbitMQ/Kafka, SQL & NoSQL databases, Redis, and Elasticsearch.
• Bachelor’s degree in Computer Science or related field.

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What we want to accomplish and why we need you?
Jio Haptik is an AI leader having pioneered AI-powered innovation since 2013. Reliance Jio Digital Services acquired Haptik in April 2019. Haptik currently leads India’s AI market having become the first to process 15 billion+ two-way conversations across 10+ channels and in 135 languages. Haptik is also a Category Leader across platforms including Gartner, G2, Opus Research & more. Recently Haptik won the award for “Tech Startup of the Year” in the AI category at Entrepreneur India Awards 2023, and gold medal for “Best Chat & Conversational Bot” at Martequity Awards 2023. Haptik has a headcount of 200+ employees with offices in Mumbai, Delhi, and Bangalore.
What will you do everyday?
As a backend engineer you will be responsible for building the Haptik platform which is used by people across the globe. You will be responsible for developing, architecting and scaling the systems that support all the functions of the Haptik platform. While you know how to work hard, you also know how to have fun at work and make friends with your colleagues.
Ok, you're sold, but what are we looking for in the perfect candidate?
Develop and maintain expertise in backend systems and API development, ensuring seamless integrations and scalable solutions, including:
- Strong expertise in backend systems, including design principles and adherence to good coding practices.
- Proven ability to enhance or develop complex tools at scale with a thorough understanding of system architecture.
- Capability to work cross-functionally with all teams, ensuring seamless implementation of APIs and solutioning for various tools.
- Skilled in high-level task estimation, scoping, and breaking down complex projects into actionable tasks.
- Proficiency in modeling and optimizing database architecture for enhanced performance and scalability.
- Experience collaborating with product teams to build innovative Proof of Concepts (POCs).
- Ability to respond to data requests and generate reports to support data-driven decision-making.
- Active participation in code reviews, automated testing, and quality assurance processes.
- Experience working in a scrum-based agile development environment.
- Commitment to staying updated with technology standards, emerging trends, and software development best practices.
- Strong verbal and written communication skills to facilitate collaboration and clarity.
Requirements*:
- A minimum of 5 years of experience in developing scalable products and applications.
- Must Have Bachelor's degree in Computer Engineering or related field.
- Proficiency in Python and expertise in at least one backend framework, with a preference for Django.
- Hands-on experience designing normalized database schemas for large-scale applications using technologies such as MySQL, MongoDB, or Elasticsearch.
- Practical knowledge of in-memory data stores like Redis or Memcached.
- Familiarity with working in agile environments and exposure to tools like Jira is highly desirable.
- Proficiency in using version control systems like Git.
- Strong communication skills and the ability to collaborate effectively in team settings.
- Self-motivated with a strong sense of ownership and commitment to delivering results.
- Additional knowledge of RabbitMQ, AWS/Azure services, Docker, MQTT, Lambda functions, Cron jobs, Kibana, and Logstash is an added advantage.
- Knowledge of web servers like Nginx/Apache is considered a valuable asset.
* Requirements is such a strong word. We don’t necessarily expect to find a candidate that has done everything listed, but you should be able to make a credible case that you’ve done most of it and are ready for the challenge of adding some new things to your resume.
Tell me more about Haptik
- On a roll: Announced major strategic partnership with Jio.
- Great team: You will be working with great leaders who have been listed in Business World 40 Under 40, Forbes 30 Under 30 and MIT 35 Under 35 Innovators.
- Great culture: The freedom to think and innovate is something that defines the culture of Haptik. Every person is approachable. While we are working hard, it is also important to take breaks to not get too worked up.
- Huge market: Disrupting a massive, growing chatbot market. The global market is projected to attain a valuation of US $0.94 bn by the end of 2024 progressing from US $0.11 bn earned in 2015.
- Great customers: Businesses across industries - Samsung, HDFCLife, Times of India are some that have relied on Haptik's Conversational AI solutions to engage, acquire, service and understand customers.
- Impact: A fun and exciting start-up culture that empowers its people to make a huge impact.
Working hard for things that we don't care about is stress, but working hard for something we love is called passion! At Haptik we passionately solve problems in order to be able to move faster and don't shy away from breaking things!
Job Summary:
We are looking for a Flutter Developer with 1+ years of experience to join our dynamic team. The ideal candidate should have hands-on experience in developing cross-platform mobile applications using Flutter and Dart. You will be responsible for designing, developing, and maintaining high-performance mobile applications that provide an exceptional user experience.
Key Responsibilities:
- Develop and maintain mobile applications using Flutter & Dart for Android and iOS platforms.
- Collaborate with UI/UX designers to implement visually appealing and user-friendly interfaces.
- Write clean, maintainable, and efficient code following best practices.
- Integrate APIs and third-party services into mobile applications.
- Optimize app performance and troubleshoot bugs or performance issues.
- Work closely with backend developers to ensure seamless integration.
- Keep up with the latest Flutter updates and industry trends.
Required Skills & Qualifications:
- 1+ years of experience in Flutter app development.
- Proficiency in Dart programming language.
- Strong knowledge of State Management (Provider, Riverpod, Bloc, GetX, etc.).
- Experience with RESTful APIs and third-party libraries integration.
- Understanding of mobile app development lifecycle and best practices.
- Experience with Firebase (Auth, Firestore, Push Notifications, etc.) is a plus.
- Familiarity with Git/GitHub for version control.
- Strong debugging and problem-solving skills.
- Ability to work independently and as part of a team.
Nice-to-Have Skills:
- Experience with native Android (Kotlin/Java) or iOS (Swift/Objective-C) development.
- Knowledge of CI/CD pipelines for Flutter apps.
- Experience in publishing apps on Google Play Store and Apple App Store.
Job Role:
As a senior R&D Java Engineer, you will work in a highly collaborative, dynamic environment. Your work will impact a lot to make world bit safer place. You’ll design creative solutions to problems faced by companies due to cyber attacks. You will work closely with other partners such as product and pre-sales managers, UI developers, and other software engineers to develop new product offerings and improve the efficiency of the solution.
Responsibilities:
- Develop, modify, and implement, the software components of Nimesa Product.
- Assist QA Engineers with the creation and review of the test cases
- Write junits and test automation if anything required to have the coverage
- Assist other Engineers with the creation of detailed software design specifications.
- Keep an eye out for technology trends, and open-source projects that can be used.
Requirements:
- Bachelor's or Master's degree in computer science or relevant fields.
- At least 3+ years experience in end-end software development for large design and coordinating project teams in the SaaS industry.
- Software development experience with Java and Spring / Springboot, RabbitMQ, MYSQL etc
- Must have worked on fairly complex products from scratch
- Strong knowledge of data structure, multithreading and other comp science concepts (SQL or NoSQL)
- Excellent social and communication skills
- Demonstrated expertise in building Web Applications, Enterprise Applications, Web Services, and Management at scale is a requirement.
- Experience with Design patterns
- Knowledge of cloud-based architectures, deployment and operational aspects of Amazon Web Services cloud
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 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-based app.
Knowledge on Model to Code Generation
Ability to work independently, with minimal training and direct guidance
Ability to respond to customer inquiries quickly
Ability to quickly modify/setup routes
Familiarity with Rhapsody Secure transmission protocols (e.g. Secure File Transfer (SFT) and Secure Object Access Protocol (SOAP) routes process, etc.
Prior experience with protocols like OSLC, SOAP and REST APIs
Ability to identify and resolve exceptions with electronic data exchange between EMR data submitters, and data recipients.
Knowledge of HL7/XML/FHIR/EDI standards
Strong in building JUnit tests during development
Qualifications & Responsibilities
- Strong hands-on experience with Java; full-stack development
- Designs, codes, tests, debug, and documents software, and enhance existing components to ensure that software meets business needs
- Deploy and maintain Applications/Systems
- Work with other software engineers for one or more Agile scrum teams assigned to work on the project · Contribute to the design and architecture to enable secure, scalable, and maintainable software and should be able to clearly articulate the implications of design/architectural decisions, issues, and plans to technology leadership
- Develop reusable patterns and encourage innovation that will enhance team velocity · Collaborate on the design with other team members and product owners, both inside and outside the scrum team
- Estimate engineering work effort for the engineering team and effectively identify and prioritize the high impact tasks
- Conduct design and code reviews to ensure code developed meets coding best practices guidelines, unit testing, security, and scalability and maintainability guidelines
- Drive a quality mindset within the team
Skills:
- 2+ years of full Software Development Life Cycle experience
- 2+ years of experience working as a full-stack java developer
- 1+ years of web development with AngularJS
- Experience or familiarity with technologies such as WSDL, REST and/or SOAP web services, XML, JBoss, Adobe CQ5 DAM, HTML5, CSS3, Bootstrap, Hibernate, Spring.
Work as a member of a team responsible for developing a HIPAA compliant secure care coordination platform in accordance with established processes. You will apply your knowledge of building scalable, distributed applications and have the opportunity to work with new technologies & frameworks such as Spring Cloud Netflix, AWS, Azure, NoSQL DB.
Essential Functions include but are not limited to the following.
You will be expected to:
- Contribute to all phases in the software lifecycle – requirements analysis, solution design, development, and deployment
- Maintain high quality standards for the work undertaken and be responsible for the quality of deliverables
- Ensure assigned projects are developed in accordance with established engineering processes, adhering to scope, schedule constraints and agile project plans
- Guide/mentor the less experienced team members
- Participate in code reviews
- Work effectively as part of a distributed team
- Document the features worked by him/her
Key technical expertise areas expected for this role:
Strong programming skills in Java 8(+) with clear understanding of Object-Oriented and Functional programming.
- Experience on REST API Programming based on a Microservices Architecture
- Good Understanding of Databases (MySQL & Mongo) and proficiency in database schema designing & writing efficient SQL Queries
- Strong troubleshooting skills
- Demonstrable ability to learn new programming languages and frameworks quickly
- Experience with distributed systems with specific focus on security and scalability
- Experience with modern cloud technologies such as AWS or Azure
Additional areas that would add value:
- Spring Cloud
- Experience working with AES 256 based encryption algorithms
- Strong understanding of Design Patterns & their application in system design
- Using DevOps & Infrastructure tooling such as GoCD/Jenkins, Git
- Experience working on projects, preferably in the healthcare domain
- Experience working with Virtualization and Containerization technologies including Docker, Kubernetes.
- Automated Unit/Integration testing
- Experience working with Linux and Shell scripting
- Frontend web development with JavaScript frameworks like AngularJS
- Test Driven & Behavior Driven Development
- Experience working in Agile Scrum/Kanban methodologies
Education and Experience:
- Bachelors or Master’s in Computer Science or related fields.
- 5+ years of experience









