Database Design for Malta-Based Software Teams

Bad Schema Is the Most Expensive Mistake in SaaS

Almost every painful migration we get called into starts with the same root cause: the original schema was designed by a generalist developer in week one of the build, before anyone really understood the domain. Two years later the product has shipped, the model is wrong, and changing it requires a coordinated migration across a live customer base, mobile clients, integrations, and analytics pipelines. The cost is rarely under €40,000.

Spending two weeks on the schema at the start of a project — with someone who has shipped a dozen of these before — is the single highest-leverage investment a Malta software team can make. OARC Digital's data team has done exactly that for fintech, iGaming, hospitality booking platforms, and operational SaaS products built out of Malta and the wider EU.

A 4-Week Engagement, Phase by Phase

The Stack We Default To

What Comes In Every Engagement

GDPR, Audit, and Malta-Specific Compliance

Malta-licensed iGaming operators, MFSA-supervised fintechs, and any business holding EU customer data have audit obligations the schema must support natively — soft deletes with retention windows, immutable audit trails on financial events, encrypted-at-rest sensitive columns, and data-residency controls that keep production data inside EU regions.

We bake those requirements into the original schema rather than retrofitting them under audit pressure. The cost of doing it once at design time is roughly 1/20th of doing it later under regulatory deadline.

Indexing and Query Plans That Actually Get Reviewed

Most production databases we audit have between three and ten missing indexes that are quietly responsible for the slowest 1% of queries — the ones that show up as P99 latency spikes, dashboard timeouts, and customer-perceived slowness during busy hours. Adding the right indexes is the single highest-leverage performance intervention available, and the wrong indexes are the second highest. We review the actual query plan for every hot query, validate the indexing strategy against real production cardinalities, and document why each index exists so a future engineer does not delete it during a cleanup.

Our review cadence is monthly for production databases over 100GB and quarterly for smaller ones. Each review surfaces new slow queries from pg_stat_statements or MySQL Performance Schema, recommends index changes, and flags emerging problems like table bloat, unused indexes consuming disk space, or missing partial indexes on growing nullable columns. Recommendations are delivered as written reports with explicit migration scripts, not vague consultancy memos.

Schema Migrations Without Downtime

Schema migrations are where most Malta SaaS teams take their first real production outage. Adding a not-null column to a multi-million-row table, renaming a hot column, or dropping an enum value — these operations look harmless in a Drizzle or Prisma migration file but each one will lock the table for minutes if executed naively. We run every schema change through a documented zero-downtime migration playbook that includes shadow columns, dual-write windows, online index builds via pg_repack or gh-ost, and a rollback plan rehearsed on a staging dataset that matches production cardinality.

Larger architectural decisions — sharding strategies, read-replica topologies, cache invalidation patterns, multi-region active-active versus active-passive — are documented in a written architecture decision record stored in the client's repository. Future engineers can read the record, understand the trade-offs, and either continue the chosen path or knowingly diverge from it rather than re-litigating the same decision every six months.

Backups, Disaster Recovery, and the Restore Drill

Backups that have never been restored are not backups. Every database we operate is tested against its own restore plan once per quarter, with a written record of restore time and any drift discovered during the drill. Disaster-recovery topology is documented in the client's repository alongside the runbook and rehearsed annually with the client's engineering team so the playbook is muscle memory rather than a PDF nobody opens. Encryption-at-rest, encryption-in-transit, and key rotation policies are aligned to GDPR Article 32 and documented for procurement reviews.

Pricing

Three transparent tiers. No setup fees, no annual lock-in.

Frequently Asked Questions

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