Harish Ostwal

Software Engineer

Noida, Uttar Pradesh, India2 yrs 7 mos experience

Most Likely To SwitchAI ML Practitioner

Key Highlights

Designed high-throughput backend services for e-commerce.
Built LLM-powered automation systems for high resolution rates.
Optimized API performance, reducing latency by 95%.

Stackforce AI infers this person is a Backend Engineer specializing in scalable SaaS solutions with AI integration.

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Skills

Core Skills

Backend EngineeringDistributed SystemsApi DevelopmentDevopsDeploymentWeb Development

Other Skills

JavaGoPythonC/C++SQLSpring BootREST APIsGraphQLKafkaMySQLPostgreSQLRedisDockerKubernetesLLMs

About

I’m a Software Engineer from IIT BHU with 2.5+ years of experience building scalable backend systems and AI-powered platforms serving millions of users. Currently at Astrotalk, I design and own high-throughput backend services powering e-commerce, real-time chat/call infrastructure, and AI-driven automation systems. I’ve worked extensively on microservices architecture, event-driven systems using Kafka, Redis-based caching, payment integrations, and complete order lifecycle orchestration across distributed services. One of my key focus areas is building reliable, production-grade systems — from concurrency control and workload balancing to idempotent processing, webhook verification, and zero-downtime deployments. I also enjoy working at the intersection of backend and AI. I’ve built LLM-powered automation systems using RAG pipelines, vector embeddings, and structured tool orchestration to drive high autonomous resolution rates. Previously, I contributed to scalable API systems at AiDash, optimizing performance across distributed clients. Tech Stack: Java | Golang | Spring Boot | Kafka | Redis | MySQL | PostgreSQL | Docker | Kubernetes | GraphQL | LLMs | RAG | Distributed Systems I’m particularly interested in backend engineering, distributed systems, system design, and AI-integrated products. Always open to discussing scalable systems, high-performance backend architecture, and impactful engineering challenges.

Experience

2 yrs 7 mos

Total Experience

1 yr 3 mos

Average Tenure

2 yrs 1 mo

Current Experience

Astrotalk

2 roles

SDE 2

Promoted

Apr 2026 – Present · 2 mos · Noida, Uttar Pradesh, India · On-site

Designed distributed lead ingestion and priority-based routing system with concurrency control, enabling low-latency processing and improving conversion by 30%.
Built priority-based distributed queue system with concurrency control, reducing response time by 60% under heavy load.
Built scalable hiring platform processing 1000+ candidates/month, reducing hiring cycle by 70%.
Tech Stack: Java, Go, Python, C/C++, SQL, Spring Boot, REST APIs, GraphQL, Kafka, MySQL, PostgreSQL, Redis, Docker, Kubernetes, LLMs, RAG, Vector Embeddings

JavaGoPythonC/C++SQLSpring Boot+13

SDE 1

Apr 2024 – Mar 2026 · 1 yr 11 mos · Noida, Uttar Pradesh, India · On-site

Built and scaled high-throughput distributed systems serving millions of users, handling high QPS traffic and driving 30% YoY growth.
Designed event-driven microservices architecture focused on scalability, fault tolerance, and eventual consistency across distributed systems.
Optimized performance using Redis caching, indexing, and query tuning, reducing API latency from 2s to 100ms (95%) and improving throughput by 3x.
Engineered real-time low-latency systems using WebSockets and Kafka, supporting high concurrency with rate limiting, fault isolation, and distributed order processing (Shopify, Unicommerce, shipment integrations).
Implemented resilient payment systems with idempotency, webhook validation, retries, and DLQs ensuring reliability and fault tolerance.
Developed LLM-powered automation platform using RAG and vector embeddings, reducing manual query handling by 70%.
Owned end-to-end backend services including design, development, deployment, monitoring; improved observability (logging, metrics, alerting) and resolved 100+ P0/P1 incidents, maintaining 99.9% uptime.
Tech Stack: Java, Go, Python, C/C++, SQL, Spring Boot, REST APIs, GraphQL, Kafka, MySQL, PostgreSQL, Redis, Docker, Kubernetes, LLMs, RAG, Vector Embeddings

JavaGoPythonC/C++SQLSpring Boot+13

Aidash

Software Developer

Sep 2023 – Mar 2024 · 6 mos · Bengaluru, Karnataka, India · On-site

Contributed to ISMS (Intelligent Sustainability Management System), delivering data-driven sustainability solutions for enterprise clients at scale.
Designed and developed scalable Java & Spring Boot APIs with validation, pagination, RBAC authorization, and performance tuning for seamless integration across web and mobile platforms.
Enhanced API performance using GraphQL and ETag-based caching, reducing response time and bandwidth usage across distributed clients through query optimization and strategic indexing.
Built an Offline Interactivity Module with real-time synchronization, conflict resolution, and eventual consistency mechanisms, ensuring uninterrupted user experience in intermittently connected environments.
Tech Stack: Java, Spring Boot, GraphQL, REST, PostgreSQL, Python, Jupyter Notebook

JavaSpring BootGraphQLRESTPostgreSQLPython+3

Kritikal solutions

SDE Internship

Jun 2022 – Jul 2022 · 1 mo · Remote

Ensured smooth deployment and operational efficiency for a core web application.
Deployed applications on company servers, maintaining high stability and reliability in production.
Created Docker-based virtual environments for OS-independent, cross-platform execution.
Built and configured frontend, backend, and database containers using Dockerfiles.
Automated deployment using Docker Compose and integrated GitLab CI/CD, improving release efficiency.
Tech Stack: Docker, GitLab, Docker Compose, SQL

DockerGitLabDocker ComposeSQLDevOpsDeployment

The sparks foundation

SDE Internship

Mar 2021 – Apr 2021 · 1 mo

Developed a Web Application which is used to transfer money between multiple users.
Used HTML, CSS, Bootstrap as a frontend, MongoDB as a database and NodeJS as a backend.
User can perform all tasks like creating an account, deposit money, withdraw amount, check balance, view all account holders detail, modify an account, view history.
Exposure: HTML, CSS, Bootstrap5, JavaScript, NodeJS, MongoDB

HTMLCSSBootstrapJavaScriptNodeJSMongoDB+1