kitox: Senior Python backend engineer

I build backends that stay up. Next: AI inference infra and security.

About

hi. i'm kitox, a solo senior backend engineer.

for 7+ years i've shipped python backends for products people pay for: django + drf apps that scaled, fastapi services that stayed fast, and celery pipelines that chewed through millions of jobs without paging anyone at 3am. mostly on aws, always in docker, provisioned with terraform.

now i'm moving down the stack: • ai infra: serving llm inference (batching, kv cache, gpu scheduling, cost per token) • security: appsec, threat modelling, breaking my own systems before someone else does

singleton.sh is my hub. every project runs as its own process on its own subdomain. there is exactly one instance of me.

scroll down to see what it's running.

the kernel

One engineer, end to end. I design the data model, write the API, run the queues, ship the infra and stay on call for it. Now I'm taking that same ownership into AI inference and security.

backend: Django/DRF, FastAPI, Celery, Postgres, Redis. APIs, queues and data models that hold up under real traffic.
ai infra: LLM inference serving: vLLM, continuous batching, quantisation, GPU scheduling, observability and cost per token.
security: AppSec and infra hardening: threat models, authz reviews, secrets handling, OWASP, and breaking things on purpose.

Projects

Audiology LMS (lms.singleton.sh, live): Learning platform for audiology students and clinics.
NEET prep (neet.singleton.sh, beta): Adaptive practice for India's medical entrance exam.
Anvil (anvil.singleton.sh, building): Forge production-ready backend services from a spec.
interview-prep SaaS (prep.singleton.sh, building): Mock interviews with an AI interviewer that pushes back.
open-source tools (github.com, live): Small, sharp tools for Django, Celery and inference ops.

Skills

Python: primary language since forever
Django / DRF: ORM, admin, DRF viewsets, auth
FastAPI: async APIs, pydantic, websockets
Celery: queues, beat, retries, idempotency
PostgreSQL: schema design, indexes, query plans
Redis: caching, locks, rate limits, streams
AWS: ECS, Lambda, RDS, S3, SQS, IAM
Docker: multi-stage builds, compose, slim images
Terraform: modules, state, least-privilege IAM
Linux: systemd, networking, tuning
CI/CD: GitHub Actions, blue/green deploys
Observability: Prometheus, Grafana, OpenTelemetry
LLM inference: vLLM, batching, KV cache, quantisation
GPU serving: CUDA basics, Triton, autoscaling
AppSec: OWASP, threat modelling, authz review
Network security: recon, hardening, CTFs

Open source

anvil-cli: Scaffold a production Django or FastAPI service in one command.
celery-sentinel: Watchdog for stuck Celery tasks and queue backlogs, with alerts.
drf-guard: Static checks for DRF viewsets: missing auth, throttles, permission gaps.
django/django: Docs fixes and an ORM edge-case patch.
infer-bench: Load-test harness for LLM inference servers: tokens/s, p99 latency, cost.
encode/django-rest-framework: Throttling docs and test coverage.
dotfiles: The kitox shell: zsh, tmux, neovim and too many aliases.

Contact

hi@singleton.sh