Prometheus Engine
We bring the fire.You bring the vision.
Custom software, built fast. Full-stack web apps, APIs, DevOps infrastructure, and AI-powered solutions — delivered by an engineer who's worked at the cutting edge of finance and technology.
What We Build
End-to-end engineering across the full stack — from UI to infrastructure.
Full-Stack Web Applications
React, Next.js, and Node.js applications built to production standards — fast, accessible, and built to scale.
API & Backend Development
RESTful APIs, microservices, and backend systems in Node.js, Python/FastAPI, and PostgreSQL.
DevOps & Cloud Infrastructure
Docker, Kubernetes, K3s, CI/CD pipelines, and cloud infrastructure that runs reliably.
AI Integration
LLM-powered features, RAG pipelines, chatbots, and AI-assisted workflows integrated into your product.
Automation & Workflows
Python scripts, Bash automation, n8n workflows, and scheduled jobs that eliminate repetitive work.
Database Design & Migration
Schema design, query optimization, and migrations for PostgreSQL, MongoDB, and SQLite.
PWA & Desktop-Class Web Apps
Progressive web apps that feel like native desktop software — installable, offline-capable, responsive.
Monitoring & Observability
Grafana dashboards, Prometheus metrics, log aggregation, and alerting for systems you can trust.
Network & Server Infrastructure
Server builds, network backbone configuration, and hardened infrastructure for demanding environments including finance and HFT.
Multi-Language & i18n
Full internationalization pipelines — translated interfaces, locale-aware formatting, and bilingual content management.
Built by the Engine
A selection of projects built end-to-end — from architecture to deployment.
Genesis One
A full-featured inventory and point-of-sale system built for retail operations. Includes real-time stock tracking, margin analysis, time clock, multi-currency support, and a windowed desktop-mode UI.
Sola Scriptura
An AI-powered Bible study platform with cross-reference tools, multilingual RAG search, EGW writings integration, voice TTS, and a full study tools suite.
Supplier Price Importer
A standalone microservice that imports supplier Excel/CSV price lists, fuzzy-matches products, compares margins, and optionally updates inventory costs via API.
The Engineer Behind the Engine
Jonathan Bessler is a full-stack engineer and systems architect with roots in DevOps and enterprise inventory and operations systems.
He sharpened his skills working with a London-based hedge fund, building high-reliability infrastructure and tooling at scale for HFT and trading environments. He continues contract infrastructure work for a London MSP whose clients include finance and trading firms — configuring the network backbone and server infrastructure that powers their operations.
Today, through Prometheus Engine, Jonathan takes on diverse projects across web development, automation, AI integration, and cloud infrastructure — bringing enterprise-grade engineering to clients of every size.
Tech Stack
Start a Project
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Get in Touch
Based in Guatemala · Working globally · Available for remote projects
Whether you need a full product built from scratch, a specific feature added, or infrastructure that won't let you down — reach out and let's talk.