
Senior Backend Engineer - Core systems
at Tech startup based in Bangalore
We are looking for a Senior Backend Engineer with a strong background in building distributed, scalable, and high-performance backend systems. The ideal candidate has 6+ years of backend engineering experience, including 3+ years in microservices or distributed architecture, and deep expertise in Python, FastAPI, PostgreSQL, Redis, and async I/O patterns.
The candidate will own backend services end-to-end — from architecture and design to implementation, optimization, and production support — while working closely with cross-functional teams to deliver mission-critical systems.
Key Responsibilities
1. Backend Architecture & Development
- Architect, design, and implement backend services using Python (preferably FastAPI) with clean, maintainable, and scalable code.
- Develop microservice components, service communication layers, and distributed workflows.
- Build APIs and backend modules optimized for performance, fault tolerance, and low latency.
2. Distributed Systems & Scalability
- Design and maintain distributed systems capable of handling high throughput and large-scale operations.
- Implement inter-service communication patterns (REST, event-driven, message queues, pub/sub).
- Ensure system resiliency through redundancy, graceful degradation, and autoscaling strategies.
3. Asynchronous & Event-Driven Architecture
- Build async workflows, background tasks, and pipeline services leveraging asyncio or async frameworks.
- Develop event-driven components including producers, consumers, and event processors.
- Optimize I/O-heavy operations to maximize concurrency and throughput.
4. Data Storage, Pipelines & Caching
- Design relational schemas, write optimized SQL queries, and work with PostgreSQL performance tuning (indexes, partitions, query planning).
- Implement caching strategies, rate limiting, distributed locks, and session storage using Redis.
- Build data validation pipelines and compliance-driven data flows ensuring data correctness and auditability.
5. Security, Reliability & Observability
- Implement authentication, authorization, encryption, and secure API practices.
- Build monitoring, alerting, metrics, and tracing systems using modern observability tools.
- Diagnose production issues, identify bottlenecks, and drive long-term fixes and improvements.
6. Code Quality & Technical Leadership
- Conduct detailed code reviews and ensure engineering best practices across the team.
- Participate in technical roadmap planning, architectural discussions, and system design decisions.
- Mentor junior and mid-level engineers; drive a culture of technical excellence and ownership.
Required Qualifications
- 6+ years backend engineering experience.
- 3+ years building microservices or distributed systems.
- Strong expertise in Python and frameworks like FastAPI (or Flask/Django with async exposure).
- Deep understanding of async I/O, concurrency models, and asynchronous programming in Python.
- Strong experience with PostgreSQL (schema design, advanced queries, optimization).
- Hands-on experience with Redis for caching, queues, session management, and distributed patterns.
- Experience with event-driven architectures, message processing, or streaming systems.
- Solid understanding of system design, scalability principles, and API lifecycle management.
- Experience working with CI/CD pipelines, containerization (Docker), and cloud environments.

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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.
What You Will Do:
• 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.
What We Expect:
• 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.
Must-Have Skills:
• 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.
Nice-to-Have Skills:
• Past experience in fintech, trading systems, or algorithmic trading.
• Experience with GoLang, C/C++, Erlang, or Elixir.
• Exposure to trading, fintech, or low-latency systems.
• Familiarity with microservices and CI/CD pipelines.
as Postgres, MySQL or MongoDB. Candidates must have an understanding of Microservices and deploying of applications to cloud infrastructure such as AWS, Azure or GCP using git, Docker and
CI/CD pipelines. Candidates must be open to learning new technologies and must be problem solvers.
The job being offered is with a leading Indian Bank as a Client-side deployment where the candidates would be working directly at the Client’s location, reporting directly to the Client’s team leads. The job entails working on exciting new projects at scale.
What you'll do:
· Perform complex application programming activities with an emphasis on mobile development: Node.js, TypeScript, JavaScript, RESTful APIs and related backend frameworks
· Assist in the definition of system architecture and detailed solution design that are scalable and extensible
· Collaborate with Product Owners, Designers, and other engineers on different permutations to find the best solution possible
· Own the quality of code and do your own testing. Write unit test and improve test coverage.
· Deliver amazing solutions to production that knock everyone’s socks off
· Mentor junior developers on the team
What we’re looking for:
· Amazing technical instincts. You know how to evaluate and choose the right technology and approach for the job. You have stories you could share about what problem you thought you were solving at first, but through testing and iteration, came to solve a much bigger and better problem that resulted in positive outcomes all-around.
· A love for learning. Technology is continually evolving around us, and you want to keep up to date to ensure we are using the right tech at the right time.
· A love for working in ambiguity—and making sense of it. You can take in a lot of disparate information and find common themes, recommend clear paths forward and iterate along the way. You don’t form an opinion and sell it as if it’s gospel; this is all about being flexible, agile, dependable, and responsive in the face of many moving parts.
· Flexible and willing to accept change in priorities, as necessary
· Demonstrable passion for technology (e.g., personal projects, open-source involvement)
· Enthusiastic embrace of DevOps culture and collaborative software engineering
· Ability and desire to work in a dynamic, fast paced, and agile team environment
· Enthusiasm for cloud computing platforms such as AWS or Azure
· Excellent written and verbal communications skills
Required Skills:
• 4+years of software development experience
• Good grasp on programming fundamentals including OOP, Design Patterns, Data Structures, Networking and OS Concepts
• Excellent coding skills (We prefer java).
• Flexible to work on any technology. Should be able to pick-up new technologies fast.
• Expertise in any programming language
• Good knowledge of relational databases and writing complex queries
• Good knowledge of web 2.0 technologies
• Knowledge of distributed systems, Multi-threading, network programming.
• Exhibit passion and enthusiasm for building and maintaining large scale platforms.
• Passionate about automated testing, good design, performance and scalability.
• Able to solve complex algorithms
• Excellent analytical, logical and problem-solving skills
If you are looking for a change this is what we can promise you:
You will have challenging problems to solve
You will have flexibility and autonomy to solve problems and deliver solutions
We will provide a highly collaborative environment with skilled and super friendly teammates
We will fully support you in developing software the right way
We won't burden you with useless policies and procedures
We will provide you the tools you need to do your job right
If that sounds attractive please apply! We'd love to talk to you.
Here are some more details about the position:
You will be hands-on writing code, unit tests, and performing peer code reviews. You will work with a project manager, software development engineers, user experience and interface designers, quality assurance engineers and customer stakeholders to deliver high quality, scalable and maintainable software solutions.
Required Qualifications
4+ years experience developing web applications using PHP
Ability to work effectively with offshore and nearshore team members
Experience performing peer code reviews
Experience writing unit tests
Experience with Git and merge conflict resolution
JavaScript and HTML, CSS
Ajax, Restful APIs and JSON
SQL (MSSQL, MySQL or similar)
Scalable Architectural Patterns
API Integrations
Asynchronous Processes and Multithreading
Desired Qualifications
5+ year of experience developing web applications.
Experience in Codeigniter PHP framework
Experience with React and Flux
frameworks like Angular, React, Bootstrap, Ember or similar
Experience working with offshore and nearshore development teams.
HTML 5 and CSS 3
Caching Technologies
Cloud Platforms (AWS, Azure, or Heroku)
Serverless technologies
IoC / Dependency Injection
Continuous Integration
Continuous delivery
Git
SourceTree and Bitbucket
Scrum
Project management software - Jira, Rally or similar
Virtual Machines
Postman
- Desired Skills:
- Hand-on experience in creating NodeJs applications preferably using the ExpressJS, any other NodeJS framework is most welcome.
- Hand-on experience in creating frontend applications using React or Angular.
- Highly proficient in both Javascript and Typescript.
- Good command over Databases both SQL/No SQL (Mongo DB, My SQL)
- Hands-on experience of GIT (version control tools).
- Good Communication Skills.
- In-depth knowledge of Microservice Architecture.
- System Design Concepts.
- Leadership capabilities (He/she will be expected to manage team engineers as well).
Good to have Technical Skills:
Docker, Redux, Redis, MeteorJS, RxJs, GraphQL, AWS/GCP/Azure development. Core Responsibility Areas:
- Project/task understanding
- Designing and documenting
owners, business analysts and team members to analyse business requirements and proposed
solutions. A highly motivated and enthusiastic to join our Core Technology team and make a
difference.
Must-Have Skills:
• Candidate should have basic experience in Core Java and Advance Java design patterns
• Candidate should have basic experience in Advance Java frameworks – Spring, Hibernate,
JSP, Servlet.
• Good understanding of MAVEN & SVN is a must.
• Front end technologies knowledge is required to communicate with the web development
team. JavaScript, JQuery, AJAX, JSON.
• Collaborating with other teams. Excellent problem solving, debugging, design and debugging
skills required.
Good to Have Skills:
• Have good interpersonal and communication skills.
• E-commerce domain knowledge will be an add-on.
• Knowledge in API Design and docker.
• Knowledge of Agile methodologies
• Knowledge of Unit testing
Primary Responsibilities:
• Work closely with Tech Leads, Architects, Project Manager / Onsite Leads.
• Understand/apply reusable code design, leverage application architecture/framework
capabilities and functionality, and design/develop solutions that are highly reliable, scalable,
and perform to meet business-defined service levels.
• Contribute to the technical code and design documentation.
• Conduct code reviews and ensuring quality solutions are built and tested.
• Provide production support and issue triage for products.
We are looking for a seasoned technology professional who can use their experience to build effective teams, high-performance culture, scalable processes and mentor aspiring talent. The candidate must be entrepreneurial, hands-on in technology, must have experience with design, development, and delivery of mobile apps, web applications and tech platforms, at scale. It is highly important for the candidate to have experience with eCommerce and is expected to have some experience in the retail sector, building technology systems and platforms.
The person is expected to be a technology leader with the capability of building and leading a high-performance engineering team.
Responsibilities
- Provide Technical authority in prospective meetings with other departments and provide guidance to developers
- Provide Hands-on Technical leadership, in the development, operation, and improvement of services
- Work with the wider team to ensure high-quality code is delivered in line with the project goals and delivery cycles
- Work with product managers to understand user needs for new/existing services
- Work closely with designers to deliver rapid prototypes as well as production code to ensure high accessibility standards are upheld. We expect familiarity with modern frameworks and languages, as well as best practices such as Clean Code, TDD, BDD, continuous integration, continuous delivery, and DevOps
- Attract, hire, retain and develop top-notch engineering/technology talent
- Implement technology product(s) as per the product requirements, using appropriate technologies
- The company’s tech-stack comprises Node.js (for Backend), MongoDB as the Database (MEAN stack), and Native App development (for iOS and Android)
- Communicate business goals to the engineers. Keep them focused on building the right product and in the right manner. Ensure that engineering is always adding business value and communicate this value to the business leaders
- Be an individual contributor if necessary. Engineering managers could spend ~20% of their time coding and contribute to the code base
- Perform regular code review of the code being developed by your team, to maintain the high quality of code
Qualification
- Computer Science & Engineering education/degree from an internationally recognized top technology institute or university
- 8-10 years of overall experience in the delivery of quality scalable and extensible software. Should currently be leading a team of top-notch developers as an Engineering Manager or Technical Architect.
- Experience of leading product development in B2C startups
- 4+ years of experience in architecting, designing, developing, and scaling high-quality mobile apps and end-to-end systems (consumer-facing and business-facing systems), under tight timelines and delivery pressure
- Experience with backend software development at a high scale. Experience with distributed systems, service-oriented architecture (SOA), and microservices design.
- Capacity to take the complete responsibility of developing and delivering a product-mobile apps and backend. Has good design sense. Has to experience with Node.js.
- Knowledge of new and cutting-edge technologies & tools. Experience working on complex projects having Analytics, Data-Science and Machine Learning components.










