Paris · Front Office · Investment Banking

Rojo
Rabelisoa

Senior Front Office Trading Engineer

"Designing the invisible infrastructure that carries every order, every pricing decision, every market move."

Rojo Rabelisoa — Senior Front Office Trading Engineer
10yrs+
Front Office Engineering
60k/day
Orders on critical flows
100+
FIX sessions monitored
5
NY · London · Paris · HK · Tokyo
01Approach

Engineering
as a business language

Code that flows through a trading floor is never neutral. Behind every FIX session, every order routing decision, every latency window tolerated, there is a business decision encoded in technical constraints — and an engineer who chose to speak both languages.

Ten years in Front Office have taught me that the value of a system is not measured by its internal elegance, but by the trust it earns from traders, sales desks, and risk managers who rely on it at market open. A successful OMS migration is a trading floor that keeps working without noticing. A resilient FIX flow is sixty thousand orders clearing validation without friction, day after day.

Since 2024, I have added another dimension to this equation: agentic AI in production-critical systems. Integrating Claude and the Model Context Protocol into Front Office workflows is not an R&D project — it demands the same standards of reliability, auditability, and resilience as any other part of the infrastructure. This positioning, rare in the Paris market, is what I am actively building.

02Work

Four projects,
four proofs

Amundi · 2026 · Four-eyes validation

The 4-eyes principle
in real time

On high-impact Securities Financing operations, the operational risk of single-party validation is well documented. The challenge: implement a four-eyes control without introducing perceptible latency on flows that never stop.

The solution relies on an asynchronous workflow decoupled from the order's critical path, with an immutable audit trail and automatic end-of-session reconciliation.

"Zero validation incidents since go-live. Control becomes invisible when it is properly designed."
Java Spring Boot Kafka Securities Financing Audit trail

BNP Paribas CIB · 2022–2026 · OMS & Custom Index Pricing

End-to-end
Front Office transformation

A complete transformation of a Front Office system managing custom index pricing and the full order lifecycle — in an environment where scalability and time-to-market directly drive commercial competitiveness.

Monolith-to-microservices migration in Java 21 / Spring Boot, preceded by business requirements gathering from trading and structuring desks. Financial data integration pipelines (Bloomberg, Reuters, Markit) built with Apache Camel. Business workflow orchestration — validation, enrichment, pre-execution preparation — via Camunda for full traceability. Futures roll-over mechanisms implemented to ensure investment strategy continuity across maturities.

Java 21 Spring Boot Apache Camel Camunda Bloomberg / Reuters Angular

Amundi · 2024 · Agentic AI

First Claude agent
in Front Office production

Integration of a Claude agent via MCP for intelligent FIX flow monitoring and incident diagnosis on the trading floor — the first production deployment of its kind in a Paris investment bank.

Strict read-only access, full traceability, contextual alerting with actionable recommendations.

Claude API MCP FIX Monitoring

SFR · 2019–2022 · SIGC Modernisation

50 million accounts,
distributed architecture

Modernisation of the SIGC system in a distributed architecture — targeting performance, scalability, and industrialised data processing at very large scale.

Java 8/11 migration, Spring Boot microservices exposing SOAP & REST for cross-system interoperability. Event-driven architecture via Kafka for real-time update notifications. Automated batch processing for external file integration with Spring Batch. Indexation of 50M+ customer accounts in MongoDB and Solr. Kubernetes orchestration via Airflow and VTOM for reliable scheduled processing.

Java 8/11 Kafka Spring Batch MongoDB / Solr Kubernetes Vue.js
03Career

Ten years,
desk to desk

04Expertise

Four domains,
one coherence

Capital markets

Front Office
& Trading

  • FIX Protocol — 4.2 to 5.0SP2
  • OMS / EMS — full order lifecycle
  • Smart Order Routing
  • Securities Financing
  • Regulatory reporting (MiFID II, EMIR)
  • Operational risk management

Backend & Architecture

Distributed
systems

  • Java 17+ / Spring Boot
  • Apache Kafka — event streaming
  • Microservices & REST/gRPC APIs
  • CI/CD — Jenkins, GitLab, Docker
  • Design patterns — CQRS, Event Sourcing
  • Testing — unit, integration, load

Data & Observability

Monitoring
& Intelligence

  • Splunk — dashboards, alerting
  • SQL / NoSQL — PostgreSQL, Redis
  • Time series — latency, throughput
  • Audit trail & traceability
  • Real-time flow analysis

Artificial intelligence

Agentic AI
in production

  • Claude API — Anthropic SDK
  • Model Context Protocol (MCP)
  • Autonomous agents in constrained environments
  • LLM integration in critical systems
  • Prompt engineering & evaluation
05Writing

On the craft,
in writing

Forthcoming

Agentic AI in Front Office: from proof of concept to production-critical

What changes when you leave the prototype behind. The real constraints of deploying on a trading floor — auditability, rollback, access governance.

Notify me on publication

Coming soon

Monolith to microservices: the real trade-offs of an OMS migration

Beyond the patterns. The compromises nobody documents: service discovery, data contracts, double-run in financial production.

In preparation

Coming soon

FIX and observability: what Splunk sees that logs cannot show

Building a real-time view of multi-venue FIX flows. Correlations, anomalies, venue latency — a monitoring infrastructure designed for trading.

In preparation

06Education

Academic
foundations

Master's degree

Software Architecture & Computer Science

Webitech Paris

2017

Java/JEE architecture, Design Patterns, Spring/Hibernate, Microservices, SOA, Big Data, Security & Software Quality.
Specialisations: distributed systems, Agile/Scrum, UML modelling, software metrics.

Bachelor's degree

BSc Computer Science — Application Development

IT University

2012 – 2016

Microsoft Student Partner — Marketing & Communications Lead.
3rd place Orange Madagascar & Microsoft award (MadaTourisme app, published on Windows Store).

Certifications

  • Claude 101 — Anthropic Education April 2026 · Verify
  • Introduction to Financial Markets — Lefebvre Dalloz Compétences April 2023 · 8h

Languages

  • French Native
  • English C1 — Professional fluency
07Contact

Contact

A project, an opportunity, a conversation about capital markets architecture or agentic AI in production — I read everything.

Email contact@rojo-rabelisoa.com LinkedIn linkedin.com/in/rojo-rabelisoa