Senior Backend Engineer with 8+ years of experience architecting distributed systems, high-throughput asynchronous pipelines, and fault-tolerant infrastructure at scale. Currently building Systems to improve Data Systems at Apollo.io, with prior engineering experience at Coinbase, Amazon, and OYO.
My recent work centers on distributed data pipelines, domain verification engines, and scalable ingestion platforms processing billions of records. Alongside core backend distributed architecture, I actively build and experiment with LLM-powered systems, AI agents, and retrieval architectures (RAG, MCP, LangGraph).
Core Engineering Focus & Technical Expertise:
> Distributed Systems & Architecture: Event-Driven Architecture, High-Throughput Pipelines, System Design, Data Modeling, Fault Tolerance, Idempotency
> Languages & Frameworks: Java, Python, Ruby, Ruby on Rails, Sidekiq
> Data Stores & Message Brokers: DynamoDB, MongoDB, Redis, Message Queues (Kafka/SQS)
> AI & Agentic Systems: LangChain, LangGraph, Multi-Agent AI Systems, Model Context Protocol (MCP), RAG, LLM Tool Calling
> Cloud & Infrastructure: Amazon Web Services (AWS), Asynchronous Ingestion (REST, SOAP, SFTP), High-Volume Data Migrations
Always open to connecting with fellow engineers, system architects, and technical leaders working on complex distributed systems and modern AI infrastructure.
Kushagra Kumar
@kushagrakumar2
Senior Backend Engineer at Apollo.io || Ex: Coinbase, Amazon, OYO
IndiaExperience
Work history, roles, and key accomplishments
Built end-to-end infrastructure to verify millions of emails and domains per month, determining email validity and domain catch-all status through scalable Sidekiq worker pipelines. Architected a country-compliant Do-Not-Call platform integrating with multiple vendors across countries.
Designed and developed App reviews on Listnr which aims to analyse user sentiments by collecting data from Appstore & Playstore and processing it via ML models to get insightful result.
Designed, developed & delivered Non-Core Quality System which provides quality metrics of labelled data for 100% of the customers onboarded to ADS. Designed, developed & delivered Pre-Processing layer for Models discard which uses ML models to filter out waste data thereby reducing the cost of labelling.
Software Dev Engineer 1
OYO
Jan 2018 - Oct 2019 (1 year 9 months)
Developed External Integration Service (EIS) which interacts with other service outside the System boundary to abstract out the complexity of interaction. Developed Search Service which uses Elastic Search under the hood.
Education
Degrees, certifications, and relevant coursework
National Institute of Technology, Patna
Bachelor of Technology, Computer Science and Engineering
Grade: 7.98/10
Bachelor of Technology in Computer Science and Engineering with a grade of 7.98/10.
Tech stack
Software and tools used professionally
Availability
Location
IndiaAuthorized to work in
Salary expectations
Social media
Job categories
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