Seamless software, harmonized data.

We design, build, and optimize systems that connect products, platforms, and people — from custom applications and WordPress plugins to high‑throughput API bridges and protocol translators. We also tune PostgreSQL and MariaDB to be fast, reliable, and cost‑efficient.

Custom Software WordPress Plugins BPMN/Process API Integration Protocol Translation PostgreSQL & MariaDB

Services

Focused, senior hands that own outcomes: from greenfield apps and plugins to hard‑won database performance and rugged integrations.

Custom Software Development

Backend and frontend engineering with Java, Node.js, Python, and modern web stacks. Resilient microservices, secure APIs, and clean UX.

Java · Spring · Quarkus Node.js · NestJS Vue · Angular

WordPress Plugin Development

Custom plugins, CPTs, admin UIs, and marketplace‑ready builds. Performance‑conscious PHP8 and modern JS for a UX your editors will love.

PHP8 REST & WP‑CLI Security & Caching

Business Process Development

Map, automate, and monitor processes with BPMN/DMN and Camunda. From form flows to complex human‑in‑the‑loop orchestration.

BPMN · DMN Camunda Workflow UX

API Integration & Protocol Translation

Bridge legacy and cloud: FIAS/HL7 to REST/GraphQL, secure OAuth2, robust rate‑limiting and retries, and end‑to‑end observability.

OAuth2 gRPC · REST Queues & Retries

PostgreSQL & MariaDB Engineering

Schema design, RLS, indexing strategies, query tuning, and migrations that scale. Measurable speed‑ups without exotic hardware.

RLS EXPLAIN/ANALYZE High‑availability

Reliability & Observability

SLAs you can trust via resilient designs, circuit breakers, idempotent APIs, and instrumentation that surfaces the right signals.

SLOs · SLIs Idempotency Tracing & Metrics

Selected Projects

A few representative builds that show our breadth — from protocol translation in hospitality to finance, healthcare, and IoT platforms.

Hotel Device ↔ PMS Protocol Bridge

Java · Microservices · FIAS → REST

Custom protocol translators to integrate hotel devices (FIAS) with modern PMS (Cloudbeds, Little Hotelier). Built for resilience and failover.

Budget Autopilot for Digital Ads

Supabase · Edge Functions · 5 Ad APIs

Algorithmic budgeting engine integrating Google, Meta, LinkedIn, Reddit, and TikTok with rate‑limiting and exponential backoff.

LegalWorks Notice Platform

Postgres · RLS · Angular

API design, data model, and backend logic with tuned SQL and DB functions; support for complex notice workflows.

HL7 FHIR Integration Middleware

Node · NestJS · OAuth2

Typescript service that converts Excel‑sourced clinical data into HL7 messages with robust auth and rate‑limit handling.

Firefly IoT Platform

Kafka · CEP · Neo4j

Device data ingestion with Kafka, complex‑event processing for alerts, and graph analytics for device dependency visualization.

Patient Data & EMR APIs

Spring Boot · FHIR · Postgres

Clinical data services with optimized SQL, native queries, and secure OAuth via Keycloak; UI fixes to meet deadlines.

How we work

Lean collaboration with senior engineering from discovery to production.

1

Discover

Workshops to align goals, constraints, and success metrics. We document the architecture and delivery plan.

2

Design

Domain models, APIs, and UX flows. We select the right stack and define SLIs/SLOs up front.

3

Build

Incremental delivery with CI/CD, test coverage, and observability wired in. Idempotent, documented endpoints.

4

Operate

Uptime, performance tuning, and cost control. Clear runbooks and post‑launch iteration.

Database Engineering

We specialize in PostgreSQL and MariaDB — from schema design and migrations to hardcore performance tuning.

PostgreSQL

  • Row‑Level Security (RLS) strategy & policies
  • Indexing (btree, gin/gist) & partitioning
  • EXPLAIN/ANALYZE‑driven query optimization
  • HA, backups, and disaster recovery

MariaDB

  • Schema refactors & normalization
  • Query plan analysis and caching strategy
  • Sharding & read replicas
  • Operational playbooks

Let’s talk

Tell us about your project and we’ll respond with a short plan and ballpark. Prefer email? dataharmoni.info@gmail.com

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