
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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• Design, develop, code and test the solution
• Experience working with large datasets and NoSQL database technologies (e.g. Cassandra, ES)
• 5-10 yrs of industry experience
• Energetic self-starter, with a desire to work in a startup environment
• Proficient in advanced Java programming skills
• Expert in Application development cloud/on premise end to end. Middle layer, DB layer.
• Nice to have understanding on MQ (e.g. Kafka)
• Good hands on in Complex Event Processing systems
• Solved scale and performance issues while dealing with huge sets of data. Pre compute or data aggregation frameworks to achieve good response time
• Experience working with large datasets and NoSQL database technologies (e.g. Cassandra, ES)
• Experience of debugging applications running on Unix like systems (e.g. Ubuntu, CentOS)
• Experience developing RESTful APIs for complex data sets
• Knowledge of container based development & deployment (e.g. Dockers, K8s)
• Expertise in software security domain, a plus
Hiring for Java Developer
Experience : 5 to 10 yrs
Notice Period : 0 to 15 days
Location : Pune
Work Mode : WFO (5 days)
As Java developer you would be expected to perform many duties throughout the development lifecycle of applications, from concept and design right through to testing. Here are some of the responsibilities you may have:
Develop high-level design and define software architecture
Implement and maintain quality systems within the group
Proficiently estimates, design approaches and nimbly move to alternate apporaches, if needed, develop and execute unit test strategies
Monitor and track tasks, and report status
Assist project heads to conceptualize, design, develop, test and implement technology solutions
Effectively collaborate with stakeholders and users to ensure customer satisfaction
Skill Set :
Java 7 / Java 8 with microservices, Multithreading, Springboot, Junit, kafka, Splunk (Good to have), Open Shift (Good to Have), Authentication/ Spring Security (Good to have)
Job Title: Golang Developer
Location: Kolkata
Job Type: Full-time
Working Days: 5 Days (Rotational off)
About the Role:
We are seeking a skilled Golang Developer with experience in Golang, Node.js, WebSocket
communication, and API development. In this role, you will work closely with our development
team to design, develop, and maintain high-performance backend systems and real-time
applications.
Key Responsibilities:
Design, build, and maintain efficient, reusable, and reliable Golang code.
Develop scalable APIs and microservices.
Integrate and build real-time communication using WebSocket protocols.
Collaborate with frontend developers and other team members to establish objectives
and design more functional, cohesive systems.
Write clean, maintainable, and well-documented code.
Optimize applications for maximum performance, scalability, and security.
Participate in code reviews, contribute to team knowledge, and continuously improve
development processes.
Troubleshoot, debug, and upgrade existing systems.
Occasionally work with Node.js services and modules when needed.
Required Skills and Qualifications:
Min 3+ years of experience in backend development with Golang.
Solid understanding of Node.js and JavaScript/TypeScript.
Hands-on experience with WebSocket integration and real-time applications.
Strong knowledge of RESTful APIs, API design principles, and API documentation. Experience with relational and NoSQL databases (e.g., MySQL, PostgreSQL, MongoDB).
Good understanding of concurrent programming and microservices architecture.
Familiarity with cloud platforms (AWS, GCP, Azure) is a plus.
Knowledge of containerization tools like Docker and Kubernetes is a plus.
Strong problem-solving skills, attention to detail, and a proactive attitude.
Responsibilities of a Senior Software Engineer (Backend):
- You will be a guide in the entire application lifecycle including research, design, development, testing (dev owns quality), along with continuous deployment and delivery
- Lead design with a major focus on best user experience, performance, scalability and future expansion
- You will act as a mentor for less-experienced peers through both your technical knowledge and leadership skills to bring in continuous improvements and implement best practices.
- You will apply the latest technology thinking from our tech radar, adopt best design practices to solve complex problems and ensure our product is the best in usability.
- You will work directly with the CEO and the cross functional product teams, align on the needs of the products and operations.
- You will analyze business, technology challenges and suggest solutions
- Build an “Awesome” team
This opportunity is for you if,
- You have 4-6 Years of work experience in building highly-interactive applications using Java, Spring MVC, Spring JMS, Spring JDBC, Spring IOC, Spring Boot, MySQL, MiBatis, ReactJS, Java Script, jQuery, AWS, JMS and have knowledge on wide range of web technologies, tools and Frameworks.
- You have experience in working with Restful webservices
- You have strong knowledge and understanding of design patterns and domain driven design
- You understand fundamental design principles behind building scalable, resilient, and maintainable applications
- You have functional knowledge of inclusive design: accessibility, and related tooling
- You have consumer web development experience for high-traffic, public facing web applications
- You have knack for writing clean, readable, re-usable code
- You have good knowledge on TDD and CI/CD practices.
- You have experience in managing and publishing releases using Git branching and tools like NPM and YARN.
- You have penchant for learning
- You are a great analytical & logical thinker and someone who loves solving problems
- You are passionate, energetic, enthusiastic and a go-getter
- You are “ FUN @ Work “
Hands-on experience with RESTful services, API design are must.
Knowledge of microservices architecture is must.
Knowledge of design patterns is a must.
Strong knowledge of Exception handling and logging mechanism is a must.
Agile scrum participation experience. Work experience with several agile teams on an application built
with microservices and event-based architectures to be deployed on hybrid (on-prem/cloud)
environments.
Good knowledge of Spring framework (MVC, Cloud, Data and Security. Etc) and ORM frameworks like JPA/Hibernate.
Experience in managing the Source Code Base through Version Control tools like SVN, GitHub,
Bitbucket, etc.
Experience in using and configuration of Continuous Integration tools Jenkins, Travis, GitLab, etc.
Experience in the design and development of SaaS/PaaS-based architecture and tenancy models.
Experience in SaaS/PaaS-based application development used by a high volume of
subscribers/customers.
Awareness and understanding of data security and privacy.
Experience in performing Java Code Reviews using review tools like SonarQube, etc.
Good understanding of end-to-end software development lifecycle. Ability to read and understand
requirements and design documents.
Good Analytical skills and should be self-driven.
Good communication with interpersonal skills.
Open to learning new technologies and domains.
A good team player and ready to take up new challenges. Active communication and coordination with
Clients and Internal stakeholders
Requirements: Skills and Qualifications
6-8 years of experience in developing Java/J2EE-based Enterprise Web Applications
Languages: Java, J2EE, and Python
Databases: MySQL, Oracle, SQL Server, PostgreSQL, Redshift, MongoDB
DB Script: SQL and PL/SQL
Frameworks: Spring, Spring Boot, Jersey, Hibernate and JPA
OS: Windows, Linux/Unix.
Cloud Services: AWS and Azure
Version Controls/ DevOps tools: Git, Bitbucket and Jenkins.
Message brokers: RabbitMQ, and Kafka
Deployment Servers: Tomcat, Docker, and Kubernetes
Build Tools: Gradle/Maven
Only 10% of India speaks English and 90% speak over 25 languages and 1000s of dialects. The internet has largely been in English. A good part of India is now getting internet connectivity thanks to cheap smartphones and Jio. The non-english speaking internet users will balloon to about 600 million users out of the total 750 million internet users in India by 2020. This will make the vernacular segment one of the largest segments in the world - almost 2x the size of the US population. The vernacular segment has very few products that they can use on the internet. One big need is that of sharing thoughts. Twitter serves this need globally through a micro-blogging platform. However most of the Tweets are in English and the vernacular Indian feels out of place on it. To solve that problem, we started Koo.
About The Company
The app is a micro-blogging platform in Indian languages. It is an app built in India, for Indians, to share their thoughts and opinions on any topic in their mother tongue using Audio/Video/Text. Koo gives a voice to Indians and enables the “Best of India” to share their thoughts with the “Rest of India”. We provide a personalised feed to users by letting people select the people they want to follow. The user is then shown content from these people. Some of the top minds of India are invited to share their thoughts and opinions on various topics. Users can follow such personalities and follow what they are talking about, and share their opinions too.
We are a Series A venture funded company. It has raised $6.5 million from stellar investors like Accel Partners, Shunwei Capital, Kalaari Capital, 500startups and Blume Venture Partners.
Technology Team & Culture
Nishant (CTO), has headed engineering for large and complex platforms like Coverfox and CitrusPay catering to the needs of millions of consumers. Technology team comprises sharp coders, technology geeks and guys who have tried entrepreneurship or are very entrepreneurial in nature and extremely passionate towards technology. Anyone being part of a technology team will have a lot to learn from their peers and mentors. Download our android app nearing 1 million downloads from play store and take a look at what we are trying to build. Technology stack compromises of a wide variety of cutting edge technologies like Elixir, Java 11, Reactive Programming, MongoDB, Neo4j, Kubernetes, AWS, NodeJS, Python, ReactJS, Redis, Aerospike, ML, Deep learning etc. Working hard & party harder is the mantra that we believe in.
Technology skill sets required for a matching profile
1. Work experience between 2 years to 8 years in building large scale high user traffic consumer facing applications with desire to work in a fast paced startup.
2. Knowledge on reactive and asynchronous programming is preferable. If you have worked with coroutines, goroutines, high concurrency or optimized number of threads for processing on your backend server you could be a good fit.
3. Extremely proficient at writing performant, scalable and production ready code in Kotlin, Java (8 or above, comfortable with concepts like lambda, streams, multithreading etc), Elixir, Rust, or Golang. Should be familiar with static code analysis, code coverage and code reviews.
4. Experience with NoSQL DBs like MongoDB, Cassandra, Redis or Aerospike is required.
Knowledge of graph DBs like Neo4j is preferred.
5. Strong in algorithms, problem solving and data structures.
6. Knowledge of TDD and experience with building applications integrated with CI-CD pipelines (automated build, tests and deployments).
7. Exposure to micro-services with good understanding of containers, kubernetes, logging, alerting and monitoring. Inter services communication. Should know how to handle multiple versions of APIs.
Required skills:-
- 2+ years of experience in the Development of JAVA technology.
- Strong Java Basics
- SpringBoot or Spring MVC
- Hands-on experience on Relational Databases (SQL query or Hibernate) + Mongo (JSON parsing)
- Proficient in REST API development
- Messaging Queue (RabitMQ or Kafka)
- Microservices
- Any Caching Mechanism
- Good at problem-solving
Good to Have Skills:
- 2+ years of experience in using Java/J2EE tech stacks
- Good understanding of data structures and algorithms.
- Excellent analytical and problem solving skills.
- Ability to work in a fast-paced internet start-up environment.
- Experience in technical mentorship/coaching is highly desirable.
- Understanding of AI/ML algorithms is a plus.

➢ Must have great ability to create RESTful webservices in SpringBoot
➢ Great to have knowledge and experience in PL/SQL
➢ Great to have exposure into React 17+/MaterialUI
➢ Exposure into Load Balancing using Nginx
➢ Exposure into Docker
➢ Exposure into Fusion
Knowledge, Skills and Attributes:
➢ Good verbal, written communication skills and interpersonal skills
➢ Ability to work in late evening shifts to overlap with the counterparts in US
➢ Demonstrate a positive attitude
➢ Display a level of integrity
➢ Immediate joining
➢ Experience of minimum 5 years
➢ Handle things individually, ready to start off
- Designing scalable systems for high load.
- Defining and improving the development processes which includes implementation and Quality Assurance as well
- Architecting complex scalable systems with a keen eye towards performance, security and availability while also taking on a super hands-on role towards implementation
- Spearheading all inbound and outbound API integrations to build the most robust and scalable integration platform in the B2B Retail space.
- Working on interesting technical challenges in a product centric and open-source driven environment.
- Using open source as much as possible, and blogging about cool things that you learnt and built.
What you need to have:
- B.Tech /B.E.; Any Graduation
- Strong relational DB experience preferred
- Must be very much in touch with backend coding and want to do it everyday
- Our stack is primarily built around Node (Loopback), Mongo and ElasticSearch.
- Deep familiarity with Git and basic working knowledge of DevOps (Server and DB config, Docker, Kubernetes etc) is strongly preferred.
- Deep knowledge of NodeJS, PHP, MongoDB and MySQL.
- The role requires a good knowledge of Algorithmic Design and Architecture, Data structures, OOPS Concepts, serverless architectures and complex problem solving skills.
- You will help set a very high bar on code quality.
- We have started the transition towards micro services, one of your core responsibilities is ensure micro services are used wherever it makes sense
Node.js, MongoDB, Redis, ElasticSearch.







