Based in Spain · Trusted Across Europe

Payments. Mobile.
Cloud. AI.
Engineered to Last.

Fenix Software Solutions builds security‑first software systems — from EMV payment terminals and CECABank integrations to scalable cloud platforms and AI‑powered automation.

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  • EMV Certified
  • iOS & Android
  • Cloud-Native & AI-Ready
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What We Build

Engineering Services

From secure payment flows to AI-powered automation — end-to-end software solutions built by senior engineers.

Payment Solutions

Full-stack payment engineering: EMV chip & contactless, POS hardware integrations, gateway connectivity, and secure transaction flows built for production.

  • EMV
  • NFC
  • POS
  • ...

Mobile Development

Native Android (Kotlin/Java) and iOS (Swift) applications — from payment SDKs and enterprise tools to consumer-facing apps built for performance and reliability.

  • Android
  • iOS
  • Kotlin
  • Swift

Web Development

Modern, performant web applications and dashboards. React, TypeScript, REST & GraphQL APIs — designed to scale and maintained to last.

  • React
  • TypeScript
  • Node.js
  • ...

Cloud Architecture

Scalable, resilient cloud infrastructure on AWS, GCP, or Azure. Kubernetes, microservices, CI/CD pipelines, and cost-optimised deployments from day one.

  • AWS
  • Kubernetes
  • Terraform
  • DevOps

AI Deployments

Private LLM deployments, AI automation pipelines, RAG systems, and model integrations — bringing intelligent automation into your products with a privacy-first approach.

  • LLM
  • RAG
  • Automation
  • Private AI

Security & Cryptography

DUKPT key management, 3DES/AES encryption, MAC generation, HSM integration, and audit-ready cryptographic architecture for financial-grade systems.

  • DUKPT
  • HSM
  • 3DES/AES
  • TLS
Payment Engineering

Deep EMV & POS Expertise

We don't just connect to payment APIs — we build from the chip up. Our engineers have deep knowledge of the full payment stack: from card reader firmware and APDU exchanges to gateway routing and acquirer protocols.

EMV Kernel Development

Contact and contactless (NFC/PICC) certified to EMVCo L1 & L2, covering 4.3/4.4 specifications across major card schemes.

POS Development

Android POS (PAX, Ingenico, Verifone) and custom hardware integrations. Full payment application lifecycle management and certification support.

CECABank Specifications

Full compliance with CECABank gateway protocols and Spanish financial system integration requirements — from message format to security parameters.

Cryptographic Security

DUKPT key derivation, 3DES/AES encryption, MAC generation/verification, HSM integration, and secure key injection protocols.

Infrastructure & Intelligence

Cloud-Native & AI-Powered

We design and operate scalable cloud systems and integrate AI capabilities that deliver real business value — privately, securely, and at scale.

Cloud-Native Architecture

Microservices, container orchestration (Kubernetes), serverless functions, and infrastructure-as-code. Built to scale reliably from prototype to production.

DevOps & CI/CD

Automated pipelines, zero-downtime deployments, GitOps workflows, and full observability stacks with alerting and distributed tracing.

Private AI Deployments

Self-hosted LLMs (Llama, Mistral, Phi), vector databases, and RAG pipelines — keeping your data and models entirely within your own infrastructure.

AI Model Integration

Integrating LLM APIs, fine-tuning pipelines, AI agent frameworks, and embedding intelligence into existing products without re-architecting from scratch.

Monitoring & Observability

Prometheus, Grafana, ELK stack, distributed tracing with Jaeger or Tempo. Full visibility into your production systems — because surprises in production are expensive.

Automation Pipelines

Business process automation, data ingestion pipelines, AI-driven workflows, and event-driven architectures that eliminate manual overhead at scale.

Discuss Your Cloud or AI Project
Our Approach

Why Fenix?

We combine senior engineering talent with a boutique focus — precision and quality that large agencies consistently fail to deliver.

Boutique Senior Engineering

No juniors carrying the load. You work directly with experienced engineers who have shipped real production systems — not theoretical designs in isolation.

Security-First by Default

Security is baked into our architecture from day one — not bolted on at the end. PCI-DSS thinking, threat modelling, and secure coding standards throughout every engagement.

Complex Integration Specialists

Legacy systems, obscure protocols, proprietary APIs — we thrive on complexity. If it touches payments, mobile, or critical infrastructure, we've solved a version of it before.

End-to-End Delivery

Architecture, development, testing, deployment, and maintenance — under one roof. No need to coordinate multiple vendors across the same delivery cycle.

Spain & EU-Based Collaboration

Based in Spain, operating under EU regulations. Aligned timezone, GDPR-aware, fluent in English and Spanish. Real partnership without cultural or contractual friction.

Startup to Enterprise

We adapt to your stage — whether you're a funded startup launching a first POS SDK or an enterprise team needing specialist payment engineers embedded in your squad.

Get in Touch

Let's Build Something

Ready to start a project? Tell us about your challenge — a payment integration, a mobile app, a cloud migration, or an AI deployment — and we'll respond within 24 hours.

Spain · European Union
⚡ 24h Response 🔒 NDA Available 🌍 Remote-Friendly

We respond within 24 hours. Your information is kept strictly confidential.