Available for consulting & freelance

Mohamed Bel Haj Youssef

Engineering Manager & Solution Architect

6+

Years experience

1.2M

Daily transactions

99.9%

Uptime SLA

20+

Enterprise projects

About

Engineering Manager & Solution Architect

Engineering Manager and Solution Architect with 6+ years leading fintech, payment, and telecom platform development. Delivered enterprise solutions processing millions of daily transactions with teams of 5–9 engineers and 99.9% uptime SLA. Currently spearheading AI adoption and consulting as Solution Architect on an enterprise agentic AI platform built on LangGraph, OpenAI/Anthropic, and Model Context Protocol (MCP).

Open to opportunities

Consulting, freelance, and full-time corporate roles

Based in

Monastir, Tunisia

Languages

ArabicNative
EnglishAdvanced
FrenchAdvanced
GermanElementary

Services

How I can add value to your organisation

Solution Architecture

Design of scalable, resilient system architectures for fintech, payment, and telecom platforms — from inception to production.

FintechTelecomBanking

Engineering Management

Leadership of cross-functional engineering teams, delivery management, quality assurance, and technical roadmap ownership.

EnterpriseScale-ups

Technical Pre-Sales & Consulting

Scope definition, client proposals, architecture reviews, and technical advisory for enterprise digital transformation projects.

TelecomEnterprise

AI Platform Advisory

Architecture consulting for agentic AI systems — multi-agent orchestration, LLM strategy, observability, and MCP integration.

AI / LLMEnterprise

Experience

Engineering Manager & Solution Architect

Pixelium, Tunisia

  • Lead cross-functional teams of 15–20 engineers across 13+ enterprise projects, achieving 100% on-time delivery.
  • Oversee platforms collectively processing over 20% of a major telecom operator's annual turnover.
  • Architect microservices solutions for fintech and telecom platforms during bootstrapping; lead technical proposals for enterprise clients.
  • Drive AI adoption company-wide: introduced agent-driven development and automated AI-powered code review in CI/CD pipelines.
  • Conduct 50+ code reviews monthly, reducing production incidents by 40% through structured quality assurance processes.

Team Lead / Technical Lead

Pixelium, Tunisia

  • Led development teams of 15–20 engineers delivering 10+ projects across fintech, telecom, and media with 95% client satisfaction.
  • Optimized critical system performance: API response times reduced by 65% (200ms → 70ms), database queries by 80%.
  • Grew team revenue contribution by 67% through technical leadership and process optimization.
  • Increased test coverage from 35% to 82% by establishing comprehensive code review and testing standards.

Full-Stack Developer

Pixelium, Tunisia

  • Developed and deployed 6+ full-stack web applications using React, Node.js, and MongoDB serving 50,000+ users.
  • Achieved 90+ Google Lighthouse scores and sub-2-second page load times across all delivered applications.
  • Built Docker-based CI/CD pipelines reducing deployment time from 120 to 15 minutes (87% improvement).
  • Contributed to infrastructure design and production rollouts for 5 applications with zero critical incidents.

Selected Projects

Client names and internal details are confidential. Contact me for a full briefing.

AI

Enterprise Agentic AI Platform

2026 — Present

Role: Solution Architect Consultant

Multi-agent AI platform unifying customer service interactions across channels — routing, resolving, and escalating inquiries with precision and full observability.

  • Multi-cloud (AWS + Azure)
  • Multi-provider LLM strategy
  • Enterprise-grade observability
LangGraphLangSmithOpenAIAnthropic ClaudeMCPAWSAzureAmazon Cognito
Telecom

Operator Digital Commerce Platform

2021 — Present

Role: Full-Stack Developer → Solution Architect & Key Account Manager

End-to-end digital commerce platform for a major telecom operator — SIM offers, physical products, data bundles, and top-ups — serving as the primary online revenue channel.

  • 1M+ monthly visitors
  • 8M TND/month in operator revenue
  • SSO & full BSS integration
Next.jsGraphQLNode.jsKeycloakElasticsearchKubernetesArgoCD
Telecom

Mobile Point-of-Sale Platform

2022 — Present

Role: Solution Architect & Project Manager

Android-based mobile channel for indirect sales networks, enabling field agents to activate SIMs and provision services directly from the field.

  • 3,000+ field agents
  • 99.9% uptime SLA
  • Zero-disruption maintenance windows
Node.jsKafkaMongoDBKubernetesEricsson BSCSMS Dynamics 365
Telecom

Indirect Channel Sales & Provisioning

2023 — Present

Role: Solution Architect & Project Manager

Multi-service indirect sales platform for real-time service provisioning across mobile, fixed-line, and broadband product lines via a nationwide POS agent network.

  • 3,000+ active POS agents
  • 4M TND/month in subscription revenue
  • 99.9% SLA
Node.jsKafkaMongoDBEricsson BSCSMS Dynamics 365 CRMKubernetes
TelecomPayment

Enterprise Telecom Payment Gateway

2024 — Present

Role: Solution Architect & Engineering Manager

Mission-critical payment gateway aggregator for a major telecom operator — shared payment backbone for all digital channels with air-gapped deployment.

  • 1.2M daily transactions
  • 99.9% uptime SLA
  • PCI/DSS compliant
  • Sub-100ms response
Node.jsOracle DBOpenShiftKafkaPrometheusGrafanaJaegerArgoCD
TelecomB2B

B2B Enterprise Self-Care Portal

2024 — Present

Role: Solution Architect & Project Manager

Enterprise self-care portal providing corporate clients with contract visibility, invoice management, bill payment, and hierarchical fleet administration.

  • ~8,000 enterprise accounts
  • Hierarchical fleet management
  • Integrated bill payment
Node.jsMongoDBReactKubernetes
TelecomPayment

Direct Carrier Billing Aggregator

2025 — Present

Role: Solution Architect & Engineering Manager

High-performance aggregator layer connecting telecom operators and content providers, handling subscription lifecycle via Direct Carrier Billing at scale.

  • 2,000+ subscription actions/sec
  • Multi-operator deployment
  • Horizontal scalability
Node.jsMongoDBKafkaKubernetesPrometheusGrafanaElasticsearch
FintechPayment

Omnichannel Payment Platform

2024 — 2025

Role: Solution Architect & Engineering Manager

PCI/DSS certified payment platform enabling online and physical payments (SoftPOS, PSP) for enterprise merchants and SMEs across all sales channels.

  • 100K+ daily transactions
  • PCI/DSS Level 1
  • 5 enterprise clients + 25+ SME merchants
Node.jsMongoDBKubernetesSoftPOSPrometheusGrafana
FintechBanking

Buy Now Pay Later — Card-Based Solution

2024 — 2025

Role: Solution Architect & Team Lead

Buy Now Pay Later solution based on physical cards, integrating with a core banking system for loan origination, approval workflows, and repayment processing.

  • Core banking integration
  • Real-time account updates
  • Full compliance monitoring
Node.jsMongoDBRabbitMQOracle DBTemenos T24Prometheus
FintechPayment

National Payment Switch

2025 — Present

Role: Solution Architect & Engineering Manager

Enterprise payment switch for national payment infrastructure — intermediary between transaction sources and banks with multi-protocol support and intelligent routing.

  • 60K+ daily transactions
  • 4 integrated banks
  • ISO8583 & SPDH protocol support
Node.jsMongoDBKafkaKubernetesISO8583SPDHPrometheusGrafana
FintechBanking

Islamic Fintech & Microinsurance Platform

2022 — 2023, 2025 — Present

Role: Team Lead (2022–2023) → Solution Architect (2025–Present)

Shariah-compliant fintech platform connecting insurers, banks, and employers to provide micro-Takaful insurance and interest-free salary advances to workers.

  • 15,000+ workers served
  • 2 insurance providers + 3 banks
  • Shariah compliance engine
Node.jsMongoDBKafkaClickHouseKubernetesArgoCDJaegerPrometheus

Technical Skills

Languages & Runtime

JavaScriptTypeScriptNode.jsGoKotlinJava

Backend & APIs

FastifyExpressREST APIsGraphQLMicroservicesEvent-Driven Architecture

Databases & Storage

MongoDBOracle DBRedisMySQLClickHouseElasticsearch

Payment & Financial Systems

PCI/DSS CompliancePayment GatewaysISO8583SPDH ProtocolTemenos T24SoftPOSPSP IntegrationIslamic Finance (Takaful)

Telecom & BSS/OSS

Ericsson BSCS (REST & SOAP)MS Dynamics 365 CRMVAS AggregationDirect Carrier BillingService ProvisioningSIM/MSISDN Lifecycle

Cloud & Orchestration

KubernetesOpenShiftDockerAWS (EC2, S3, EKS)HelmArgoCD (GitOps)

Messaging & Streaming

Apache KafkaRabbitMQRedis Pub/Sub

Observability & Monitoring

PrometheusGrafanaJaegerELK StackAlertManagerClickHouse

DevOps & CI/CD

GitLab CI/CDArgoCDHarbor RegistryAnsibleInfrastructure as Code

Identity & Access

Keycloak (SSO, SPI, Custom Themes)OAuth2OIDC

Frontend

ReactNext.jsRedux ToolkitReact QueryTypeScriptHTML5/CSS3

AI & Agentic Systems

LangGraphLangSmithOpenAI APIAnthropic Claude APIMCP (Model Context Protocol)Multi-Provider LLM StrategyAgent-Driven Development

Leadership & Management

Engineering ManagementSolution ArchitectureTeam Leadership (5–9 engineers)Agile/Scrum (PSM I)Key Account ManagementTechnical Pre-Sales

Education

Engineer's Degree in Software Engineering

Polytechnique Sousse

2020 — 2023

Bachelor's Degree in Computer Programming

ISET Sousse

2017 — 2020

Certifications

Professional Scrum Master™ I (PSM I)

Scrum.org · May 2023

Languages

ArabicNative
EnglishAdvanced
FrenchAdvanced
GermanElementary

Get in Touch

Available for consulting, freelance engagements, and corporate opportunities. Let's discuss your project.

Email

[email protected]

Phone

+216 51 00 09 07

LinkedIn

linkedin.com/in/mohamedbhy

Location

Monastir, Tunisia