Khichdi InfoTech

Growth · Python-native

Python Backend Development

Production APIs and services — layered architecture, PostgreSQL engineering, integrations, Docker/Linux deploys, and maintainable code standards.

Credentials & trust

Proof before promises

We show the delivery record upfront: partner credentials, published case studies, and NDA-friendly engineering work you can review before sending an inquiry.

01

Odoo Learning Partner

Official partner credentials across Community and Enterprise delivery.

02

Odoo 10–19 expertise

Community & Enterprise Editions implementations, migrations, integrations, and custom modules.

03

45+ modules shipped

Custom modules across client projects, integrations, migrations, and partner work.

04

6+ years software development experience

Software delivery across employment, freelance consulting, and founder-led projects.

05

NDA & white-label ready

Partner-friendly delivery where client names and confidential work stay protected.

06

7 published case studies

Migrations, Shopify, POS, manufacturing, logistics, and self-hosted deployments.

Backend authority

Python services built for production traffic — not tutorial APIs

We design and ship Python backends as operable systems: clear boundaries, observable behaviour, and integrations that survive retries. For process automation layered on top of APIs/ERP, see Python Automation.

Need scheduled process/ERP automation rather than an API product? See Python Automation →

Backend architecture

Layered, API-first services that can scale

Boundaries that keep business rules testable and infrastructure replaceable.

Layered architecture

Transport (HTTP) · application/use-cases · domain rules · infrastructure adapters. Route handlers stay thin; business logic is testable without spinning a server.

API-first approach

Schemas, status codes, pagination, and error contracts are designed for clients — mobile, React, partners — before incidental endpoints appear.

Service architecture

Start with a well-structured service. Split only when team or scale boundaries demand it — not because microservices are fashionable.

Scalability principles

Stateless app processes, durable state in the database/queues, connection pooling, and back-pressure on slow dependencies.

Frameworks & APIs

FastAPI, Django, Flask, REST, GraphQL & jobs

Choose tools for the domain — then operate them like production software.

FastAPI

Typed APIs, OpenAPI generation, async I/O for IO-bound services, and clean dependency injection patterns.

Django

Batteries-included admin, ORM maturity, and structured apps when the domain benefits from Django’s conventions.

Flask

Lightweight services and internal tools where minimal framework surface is the right trade-off.

REST APIs

Resource-oriented endpoints, pagination, filtering, and authn/authz consistent across clients.

GraphQL

When clients need flexible reads without chatty REST — with query cost awareness and clear schema ownership.

Background jobs & queues

Celery/RQ/arq-style workers for email, imports, webhooks, and long tasks — with visibility into failures.

Database engineering

Schema, transactions, indexing & tuning

PostgreSQL as the default store — engineered, not treated as a black box.

Schema design

Normalisation where integrity matters, pragmatic denormalisation where read paths demand it — documented either way.

Transactions

Explicit transaction boundaries for multi-step writes. Avoid long transactions that lock hot tables under load.

Indexing

Indexes driven by real queries and EXPLAIN plans — not speculative indexes that slow every write.

Query optimization

Eliminate N+1 patterns, select only needed columns, and paginate large result sets.

Performance tuning

Connection pools, statement timeouts where appropriate, and vacuum/bloat awareness on long-lived PostgreSQL instances.

Migrations

Expand/contract friendly changes, backup awareness, and production migration steps that do not assume silent downtime.

Integrations

ERP, Shopify, payments, APIs & webhooks

Idempotent writes and failure visibility — especially when money or stock moves.

ERP integrations

Odoo and other ERPs via APIs/RPC with respect for accounting and inventory constraints — not only JSON shape.

Shopify

Order, inventory, fulfilment, and product sync patterns with idempotent writes and exception queues.

Payment gateways

Webhook verification, reconciliation-friendly event handling, and careful handling of partial failures.

Third-party APIs

Timeouts, retries with backoff, rate-limit respect, and circuit-breaking when a dependency is unhealthy.

Webhooks

Signature validation, replay safety, and durable processing so a crash mid-handler does not lose events.

Background processing

Move long work off the request path; expose job status and failure visibility to operators.

Security & testing

Authn, authz, hardening & test strategy

Boundaries that keep “logged in” from meaning “allowed everywhere.”

Authentication

Token/session/OAuth patterns matched to the client with short-lived credentials where possible.

Authorization

Object-level permission checks — authenticated does not mean allowed everywhere.

Hardening habits

Input validation, secrets outside source control, least-privilege DB roles, and safe upload handling.

Testing strategy

Unit tests for domain rules, API contract tests, and targeted integration tests for externals.

Deployment

Linux, Docker, reverse proxy, SSL, monitoring

Ship paths that survive the second month — not only the demo day.

Linux servers

Proven layouts for app users, systemd/process managers, and environment separation.

Docker

Reproducible images for app and workers; compose or orchestrated deploys when the environment needs them.

Reverse proxy & SSL

Nginx/Caddy (or equivalent) termination, HTTPS, and sensible upstream timeouts.

Monitoring & logging

Structured logs, health endpoints, latency/error signals, and queue depth visibility for workers.

Code quality

Reviews, docs, standards & maintainability

Boring, explicit code beats clever code that only one person can change.

Clean architecture habits

Dependencies point inward to domain rules. Infrastructure details stay replaceable.

Code reviews

Reviews catch correctness, security, and maintainability — not only formatting.

Documentation

README for run/deploy, env vars, critical flows, and integration contracts that outlive Slack threads.

Version control & standards

Meaningful commits, protected main, linting/formatting, and coding conventions the team can enforce.

Long-term maintainability

Prefer boring, explicit code over clever shortcuts that only the author understands six months later.

Support & maintenance

How backends stay healthy after go-live

Stabilise, document, then retain — so ownership does not evaporate.

  1. 01

    Stabilise after launch

    Watch error rates and slow endpoints in the first weeks; fix defects before they become folklore.

  2. 02

    Dependency & security cadence

    Scheduled updates for libraries and base images with staging verification.

  3. 03

    Operational runbooks

    How to restart workers, replay failed jobs, and diagnose common integration failures.

  4. 04

    Retainer path

    Ongoing care moves to Maintenance (or Odoo Support when ERP-centric) so ownership does not evaporate.

SLA plans and broader retainers: Maintenance & Support →

Code quality

Maintainability over clever shortcuts

Clear boundaries

Separate transport, domain rules, and infrastructure so systems stay testable.

Code reviews

Reviews catch correctness, security footguns, and long-term cost — not only style.

Technical debt visibility

Debt is named and burned down deliberately — not ignored until the next outage.

Boring by design

Explicit code that the next engineer can change beats clever one-liners.

Security habits

Least privilege and safe change control

Secrets hygiene

Credentials stay out of repositories and use least-privilege accounts.

Authz on the server

UI may hide actions; permissions are enforced where they matter.

Input validation

Reject bad payloads early — especially on public APIs and webhooks.

Controlled deploys

Risky changes get staging verification and an agreed production window.

Why trust this engagement

Signals that matter for this service

Relevant proof only — full credentials and portfolio remain available site-wide.

API-first backends

Contracts clients can rely on.

PostgreSQL engineering

Schema, indexes, and transactions treated seriously.

Integration literacy

ERP, Shopify, payments, webhooks.

Operable deploys

Linux, Docker, proxy, SSL, monitoring.

Related reading in the Knowledge Hub

Published guides, tools, and comparisons — no manual URL required.

Next step

Automating processes on top of the API?

Backend is the service layer — Python Automation covers scheduled ERP and ops workflows.

Frequently asked questions

FastAPI or Django — how do you choose?

FastAPI when you want typed API-centric services and async IO. Django when admin, batteries, and convention speed matter. We choose based on domain and team, not fashion.

Do you build GraphQL by default?

No. REST remains the default for many business APIs. GraphQL is used when client flexibility justifies schema and cost-control complexity.

How does this relate to Python Automation?

Backend is the service layer. Automation is the scheduled/process layer that may call those APIs or ERP. Overlap is normal; the pages stay separate so scope stays honest.

Can you take over an existing Python service?

Yes — after a baseline of tests, secrets, deploy path, and failure modes. Fragile unowned scripts may need a rewrite plan.

How do you approach ERP and Shopify integrations?

Idempotent writes, clear mapping documents, exception queues for bad payloads, and respect for stock/accounting side effects — especially when Odoo is involved.

What about real-time features?

WebSockets/SSE or queue-driven pushes when needed. We keep real-time surfaces narrow and authenticated.

How is the backend maintained after go-live?

Launch stabilisation first, then optional Maintenance retainers for monitoring, patches, and controlled enhancements. See the Maintenance page for SLA plans.

Who owns the source code?

You do. Deliverables land in repositories and environments you control. We do not lock work behind proprietary hosting you cannot leave.

Do you provide documentation?

Yes — run/deploy notes, integration contracts, and handover packages. Documentation is part of delivery, not an unpaid afterthought.

What if requirements change mid-project?

We re-estimate impact on timeline and cost, then confirm before expanding scope. Support retainers separate break/fix from enhancements so incident capacity stays honest.

What happens after delivery?

Knowledge transfer, then a 30-day complimentary window for implementation bugs in our delivered work. Ongoing care moves to a maintenance or Odoo Support retainer if you want continuous coverage.

After you contact us

What happens next

Clear expectations reduce buying uncertainty — no mystery black box after you hit submit.

  1. 01

    We review your inquiry

    Within one business day we confirm understanding, ask for missing access/context, and propose the right engagement type.

  2. 02

    We recommend a path

    Project, dedicated capacity, support retainer, or rescue assessment — matched to your constraint, not a generic package.

  3. 03

    You decide next

    Scoped next step, commercial terms, and kickoff checklist. No hostage tooling — your repos and credentials stay yours.

Discuss a production Python backend

Share API consumers, data stores, and integration dependencies.

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