profile.png
Krishna Kumar

> identity: backend_engineer

> location: bengaluru_india

> focus: aws_distributed_systems

> status: open_to_opportunities

Open to Opportunities

Backend Engineer | Distributed Systems

Building production-grade APIs, event-driven AWS workflows, realtime systems, and AI-ready backend services at Accenture.

View Resume
API

1+

Year Backend Experience

Cloud

AWS

Lambda, SQS, Step Functions

Cache

Redis

Sessions, Presence, Rate Limits

Build

3

Backend-Heavy Projects

Experience

Backend engineering experience across industrial data APIs, AWS workflows, auth systems, and headless content integrations.

Software Engineer (Intern + FTE)

Full-time

Accenture India · Bengaluru, India · Feb 2025 - Present

  • ▹Built backend APIs for AVEVA CDS industrial sensor-data workflows, separating ingestion, validation, and dashboard-facing reads through asynchronous processing.
  • ▹Worked on AWS data pipelines using Lambda/Fargate components for long-running processing, status tracking, and downstream prediction API handoff.
  • ▹Stored model and pipeline configuration in DynamoDB, shaping API contracts around validation, traceability, and inference-ready payloads.
  • ▹Handled backend reliability concerns across VPC-aware services, rate limiting, auth boundaries, and release/debug coordination with cross-functional teams.
PythonREST APIsAWS LambdaECS FargateDynamoDB

Backend Developer Intern

Internship

Envint Global · Remote · Aug 2024 - Dec 2024

  • ▹Built Node.js/Express CMS APIs with JWT access tokens, Redis-backed refresh sessions, encrypted cookies, bcrypt hashing, and MongoDB models.
  • ▹Implemented Admin/Moderator/User RBAC middleware and request validators to protect article, user, file, and editorial workflow endpoints.
  • ▹Integrated Cloudinary-backed file handling and cookie-based session flows for authenticated content-management operations.
Node.jsExpress.jsJWTRedisMongoDBRBAC

JAMstack Developer Intern

Internship

WeFrameTech · Remote · Jun 2024 - Jul 2024

  • ▹Integrated Directus and MedusaJS-backed content/commerce flows, normalizing API payloads for reusable JAMstack delivery.
  • ▹Connected backend content models to frontend-facing APIs while keeping data contracts consistent across pages and components.
DirectusMedusaJSNode.jsHeadless CMS

Featured Projects

Backend-heavy systems with realtime messaging, event-driven AWS processing, auth, storage, and deployment concerns.

Featured

NoviSentinel

Code

Built an AI safety and PII firewall that sits between LLM apps and their users, scanning inputs and outputs in real time. Detects prompt injection (regex + ML), PII leaks, exposed credentials, and toxicity — with a Python SDK, HMAC-signed webhooks, and a self-hosted Docker Compose stack.

▹Two-layer injection detection: regex short-circuits ML for sub-1ms blocking
▹Presidio NLP for PII redaction (SSN, credit card, email, phone, IP)
▹Regex secrets scanner for 10 credential types (OpenAI, AWS, GitHub, JWT)
▹Detoxify ML toxicity detection with per-category severity thresholds
▹HMAC-SHA256 signed webhooks for real-time Slack/PagerDuty alerts
▹Python SDK with sync and async clients — 5-line integration
PythonFastAPIPostgreSQLRedisHuggingFace TransformersPresidiodetoxifyDocker
Featured

NoviConnect

CodeLive

Built a backend-heavy realtime chat platform with Express 5, TypeScript, MongoDB, Redis, and Socket.IO. The service owns cookie-based auth, OTP and Google-assisted onboarding, chat/group APIs, unread state, read receipts, encrypted payload storage, and media attachment orchestration.

▹REST + Socket.IO gateway
▹Cookie auth across HTTP and sockets
▹Redis presence and refresh sessions
▹E2EE-aware message persistence
▹Cloudinary attachment lifecycle
▹MongoDB aggregation for unread counts
TypeScriptNode.jsExpress 5MongoDBRedisSocket.IOCloudinaryResendGoogle Auth
Featured

Smart Media Uploader

Code

Architected an event-driven media backend where FastAPI issues presigned S3 upload URLs, DynamoDB tracks upload sessions and job state, SQS buffers jobs, Lambda dispatches workflows, and Step Functions coordinates ECS Fargate workers for media processing.

▹Direct-to-S3 presigned uploads
▹DynamoDB job and session tracking
▹SQS-backed async processing
▹Step Functions orchestration
▹ECS Fargate worker isolation
▹Terraform-managed AWS infrastructure
PythonFastAPIAWS DynamoDBS3SQSStep FunctionsLambdaECS FargateTerraform

Realtime Tic-Tac-Toe Engine

CodeLive

Implemented a server-authoritative multiplayer game backend on Nakama, with isolated match state, join validation, move validation, timed turns, timeout handling, disconnect outcomes, matchmaking RPCs, and a global leaderboard backed by Nakama storage.

▹Server-authoritative match lifecycle
▹Realtime matchmaking
▹30-second timed turns
▹Persistent leaderboard
▹Optimistic-concurrency stat writes
▹Dockerized Nakama runtime
TypeScriptNakamaWebSocketsDockerReactViteZustand

Article CMS

Code

Built a Node.js/Express content-management backend with JWT access tokens, Redis-backed refresh sessions, encrypted auth cookies, RBAC middleware, MongoDB article/user/file models, validation middleware, and Cloudinary-backed media handling.

▹Admin/Moderator/User RBAC
▹Redis-backed refresh sessions
▹Encrypted cookie auth
▹MongoDB content models
▹Cloudinary media handling
Node.jsExpress.jsMongoDBRedisJWTCloudinary

Skills

Backend-first toolkit across APIs, data stores, AWS infrastructure, AI system integration, and reliability patterns.

Languages

TypeScriptJavaScriptPythonJavaGoC++

Backend & APIs

Node.jsExpress.jsFastAPIREST APIsWebSocketsSocket.IOJWTOAuth2

Databases & Caching

MongoDBPostgreSQLMySQLRedisAWS DynamoDB

Cloud & AWS

AWS LambdaECS FargateAmazon S3AWS SQSAWS Step FunctionsIAMVPCTerraform

AI Systems

LLM APIsPrompt orchestrationInference APIsModel configuration storage

Backend Reliability

Async workflowsRate limitingRetriesCachingCost-aware API design

Tools

GitDockerPostmanCI/CDAgile/ScrumCode ReviewsCross-functional Collaboration

Concepts

Distributed SystemsMicroservices ArchitectureEvent-Driven SystemsAuthenticationRBACCloud Security

Frontend Familiarity

React.jsHTMLCSSMaterial UIRedux Toolkit

Education

Academic background.

Bachelor of Engineering

Institute of Engineering & Technology, Devi Ahilya Vishwavidyalaya ↗

Indore, Madhya Pradesh, India

2021 – 2025CGPA: 7.49

Certifications

Industry-recognized credentials.

Oracle Cloud Infrastructure 2025 Certified Generative AI Professional

Verify credential ↗

Oracle Cloud Infrastructure 2025 Certified AI Foundations Associate

Verify credential ↗