Our API gets slower as data grows. Is that fixable without a rewrite?

Almost always. Degradation of that shape usually points to N+1 queries or missing indexes rather than architecture. We profile the actual SQL first — the fix is often a handful of lines.

Can you run migrations against a live production database?

Yes, with care. Adding columns and indexes concurrently is routine; changing types or backfilling large tables needs a staged approach. We rehearse against a production-sized copy before touching the real thing.

Should we use the ORM or write raw SQL?

Both, deliberately. The ORM is right for most CRUD; complex reporting queries are usually clearer and faster as raw SQL. Insisting on one everywhere is the actual mistake.

Hire SQLAlchemy Developers

Python backend engineers who understand both the ORM and the SQL it generates.

Get Matched with a Developer

Almost every slow Python backend we are handed has the same root cause: an ORM used without regard for the queries it produces. N+1 lookups in a loop, eager loading everything to avoid them, sessions held open across requests. Our SQLAlchemy engineers read the generated SQL and the query plan, not just the Python — which is usually where the ten-fold speedups are.

What clients hire our SQLAlchemy engineers for

Fixing slow endpoints

Finding N+1 queries and missing indexes, and choosing loading strategies deliberately rather than by default.

Data model and migrations

Designing schemas that will survive change, and writing Alembic migrations that run safely against a live database.

Legacy to modern SQLAlchemy

Migrating older query-style code to the 2.0 API without stopping feature work.

SQLAlchemy skills we staff for

SQLAlchemy ORM & Core (1.4 / 2.0)

Query optimisation & eager loading strategies

Alembic migrations against live databases

PostgreSQL & MySQL tuning

Session and transaction management

FastAPI / Flask integration

When it’s worth bringing in SQLAlchemy expertise

Hire a SQLAlchemy engineer when endpoints slow down as data grows, when migrations are run manually because nobody trusts them, or when the data layer has become the part of the codebase everyone avoids.

Flexible Hiring Models

Hourly

Pay only for the hours you need. Ideal for short tasks, fixes, and overflow work.

Dedicated (Monthly)

A full-time developer working only on your product, integrated into your team and tools.

Dedicated Team

A full squad — developers, QA, and a project manager — to own your roadmap end to end.

Need a whole team instead of one engineer? IT staff augmentation or browse every role we staff.

Hiring SQLAlchemy developers — FAQs

Discuss your project

Tell us what you are building or what needs fixing. You will hear back from an engineer — not a sales rep — within one business day, usually with questions or a rough approach.

Your enquiry goes straight to our engineering team — the people who will scope and build your project, not a sales desk.

sales@dablewdevs.com Book a free 30-min call