Mahieddine Dellabani
Software Architect | High-Performance Java & Distributed Systems
Seasoned Software Architect with deep expertise in Java, JVM internals, and high-performance database systems. I build scalable distributed systems and real-time analytics platforms for financial services — from in-memory OLAP engines to market risk and FRTB solutions. Strong emphasis on concurrency, observability, and production-grade deployments.
Passionate about software architecture and clean code, I continuously explore emerging technologies and experiment with new features to solve real-world challenges. I also design and build modern, responsive websites — from landing pages to full web applications — using React, Next.js, and Tailwind CSS.
Beyond technical expertise, I have experience leading teams, mentoring engineers, and contributing to product roadmaps, ensuring alignment between technical execution and business goals.
About me
Software Architect with 10+ years building high-performance Java applications and scalable distributed systems. Specialized in real-time analytics, in-memory databases, and financial services platforms including market risk, credit risk, and FRTB. I also design and develop modern, responsive websites and web applications. Autonomous, curious, and experienced in multicultural environments. Whether leading a team, diving deep into architecture, or crafting a pixel-perfect website, I build great products for both users and developers.
- Location:Saint-Medard, 64370, France
- Age:35
- Nationality:French / Algerian
- Interests:Football, Vinyl, Piano, Surf, Snorkling
- Employment:Freelance.
TECH STACK
Languages
Java
JavaScript
TypeScript
C++
Python
HTML
CSS
Tools, Libraries and Frameworks
Spring Boot
Next.js
Expo (React Native)
Node.js
React
GitLab CI
CircleCI
Jenkins
JFrog
SonarQube
Docker
Azure
AWS
GitHub
Databases
PostgreSQL
SQLite
Neo4j
Work
Freelance Web Designer & Developer
2024 - Present
Self-employed - Full Remote
Designing and developing modern, responsive websites and web applications for businesses and creatives.
Love Reaction: Music label website featuring a custom audio player, playlist management, SoundCloud RSS feed integration, and dark/light theme switching.
Collectif Entraide: Business website for a first aid training organization with session booking, admin dashboard, email notifications, and SEO optimization.
Personal Portfolio: This retro-themed portfolio site built with Next.js, Tailwind CSS, and TypeScript.
Next.jsReactTypeScriptTailwind CSSshadcn/uiHeroUIDrizzle ORMTursoNextAuthVercelResponsive DesignSEOFramer Motion
Software Architect
04/2025 - Present
Real-Time Analytical Platforms (ActiveViam Accounts) - Full Remote
Leading technical delivery and architecture for real-time risk analytics platforms serving Tier-1 banking clients. Driving design decisions, mentoring a team of 6 engineers, and owning end-to-end technical execution with full autonomy — from migration strategy to production-grade feature delivery.
Santander — Market Risk
Direct Query with Databricks: Owned the full setup of Direct Query from A to Z, enabling the platform to query risk data directly from Databricks at scale — covering schema design, SQL dialect adaptation, naming conventions, and production deployment.
Platform Migration: Key driver of the platform migration, delivering it end-to-end while simultaneously implementing new features across PnL, Sensitivity, and VaR cubes.
Performance & Observability: Tuned query performance and set up end-to-end observability with OpenTelemetry, Prometheus, and Grafana to ensure reliability at production scale.
BBVA — Risk Viewer
Projection Engine: Leading the design and implementation of the Rho Basis Projection feature — a high-priority capability for traders that projects basis swap curves into related curves for sensitivity analysis across multiple currencies.
Platform Migration: Led a cross-framework migration spanning Spring Boot, Spring Batch, Atoti, JDK 21, and AWS libraries — ensuring continuity for all existing risk calculations and reporting workflows.
Performance Optimization: Driving performance tuning and caching strategies for real-time projection calculations across large portfolios.
AtotiDirect QueryDatabricksMarket RiskSpring BootJava 21OpenTelemetryKafkaAWSPostgreSQLPerformanceTeam Leadership
R&D Software Architect
09/2023 - 02/2025
Huawei - Full Remote (1 week per month in Grenoble)
Grenoble Fermat Lab. is responsible for advanced technical research and development of Model-based and Formal methods for different business domains including Automotive and ICT. The team is responsible for building formal modeling, simulation, verification and code generation tools for the design and development of trustworthy and efficient embedded software.
Scalable & High-Performance DSL Runtime: Designed, implemented, tested, and benchmarked a Java runtime interpreter and exploration engines for a domain-specific language.
API Design & Extensibility: Designed a user-friendly API to expose and parameterize runtime internals, enabling seamless configuration, enhanced observability, and greater flexibility for developers.
Canonical Serialization & Database Integration: Implemented canonical serialization for structured data persistence and seamless interoperability. Designed and optimized data handling for SQLite and Neo4j, ensuring efficient storage, retrieval, and query performance.
Java Migration & Modernization: Led the migration from Java 8 to Java 21, leveraging new features like Records, Virtual Threads, and Structured Concurrency to enhance performance and maintainability.
Formal Methods & Verification: Explored modeling technologies for developing trustworthy software.
Cross-Team Collaboration: Worked closely with Supply Chain teams to address performance issues and implement their use cases, ensuring high-quality, robust software solutions.
CI/CD & Infrastructure Modernization: Updated all CI/CD scripts, led the migration of Jenkins, and ensured a more efficient and reliable build pipeline.
Engineering Best Practices: Established team-wide best practices, including Architecture Decision Records (ADR), improved repository documentation, and structured the wiki for better knowledge sharing.
API DesingDSL RuntimeFormal MethodsPerformanceBenchmarkingSerializationSQliteNeo4jJava 21Eclipse OSGIC++SQLCypherGtilabCIJenkinsDockerSonarQubeConcurrent SystemsSimulation
Open Contributor
09/2023 - 03/2024
SquashQL - Full Remote
SquashQL is an open-source SQL query engine designed to streamline the process of building multi-dimensional queries. At its core, it acts as a middleware layer that stands between SQL databases and multiple clients or front-end applications.
Compiled Queries & API Refinement: Led a significant restructuring of the query API by introducing
CompiledXXX objects, separating query user API from query engine internals, ensuring cleaner code and better maintainability. This redesign simplifies query execution, enforces the SRP principle abd enable the introduction of the vector aggregation feature.Date Functions Support: Added support for date functions within the query engine, improving query flexibility and user capabilities.
API Enhancements: Introduced a public
total_count measure, counting the total number of results not considering the query limit.Query Scope & Resolver Optimization: Streamlined query scope management by introducing QueryResolver, replacing static helper methods with a more flexible and scalable approach.
String Removal & Field Optimization: Spearheaded the initiative to replace all Strings in query building with typed Field objects, paving the way for future POJO query compilations and improving query resolution consistency.
Execution Graph Simplification: Simplified the query execution graph, optimizing performance and making it easier for developers to manage complex queries.
API DesignQuery OptimizationPerformanceSQLDatabase EngineeringDate FunctionsJava 21Field ObjectsCompilerConcurrency
Technical Lead
06/2019 - 09/2023
Activeviam - Full Remote (1 week per month in Paris)
As part of the R&D team, I designed and built Atoti, a real-time decisive data analytics software for financial services.
Team Leadership & Mentoring: Led a team of 6 engineers, overseeing development, design sessions, and code validation. Provided mentorship, supervised project planning, and coordinated team efforts to ensure timely delivery and adherence to best practices. Owner of the distributed, monitoring and aggregation modules.
Product Development: Designed, built, tested, and deployed Atoti Java API capabilities: Aggregation engine, real-time updates, distributed computing, MDX querying.
Monitoring: Involved in enhancements and implementations of Atoti Application Performance Monitoring stack: Tracing, metrics, and logs.
L2 Support: Solved performance issues and assisted clients in using the APIs.
JDK Features Prototype: Supervised the internship and university project focused on maximizing the impact of new JDK capabilities in Atoti Java API (projects Loom and Panama).
In-MemoryDistributed SystemAggregationConcurrencyMonitoringJava 17JavascriptZipkinLogstashGrafanaPrometheusDockerAtotiActivePivotCircleCIArtifactoryGithubActionsSpringBootRESTMDXOLAPLeadershipTeam Management
R&D Software Engineering
09/2018 - 06/2019
INGIMA - Paris
INGILAB is the Innovation Lab and POC Factory of INGIMA, focused on exploring new possibilities with its motto "explore by doing." As part of INGILAB, I worked on various research studies and proof of concepts in multiple fields such as image processing, machine learning, and embedded systems.
PDF Parsing & Extraction: Developed and optimized a solution for analyzing nutrition table conformities by parsing and extracting relevant data from PDF documents. This project aimed at automating the comparison and validation of nutrition information to ensure accurate product distribution.
OCR Project with Google Cloud: Led the OCR (Optical Character Recognition) project using Google Cloud to extract text from images and scanned documents, improving data accessibility and processing efficiency for distribution clients.
OCRGoogle CloudPDF ParsingMachine LearningImage ProcessingData ExtractionCarrefour
Full Time Researcher - PhD in Computer Science and Mathematics
10/2014 - 09/2018
Verimag - Grenoble
My thesis focused on the design, optimization, and validation of distributed real-time applications for embedded systems. Specifically, it delved into using formal methods to address challenges in distributed real-time environments, such as communication delay, optimization issues, and clock drift.
Distributed Real-Time Applications: Designed and optimized real-time applications for embedded systems using formal methods to solve critical issues like communication delay and clock drift.
Formal Methods & Verification: Applied formal methods, including timed automata and model-based development, to verify the correctness and performance of the distributed systems.
Formal MethodsModel-Based DevelopmentTimed AutomataDistributed SystemsEmbedded SystemsOptimizationVerificationJavaAcceleoEclipse
Teaching Fellow
09/2015 - 09/2016
IUT Valence - Université Grenoble Alpes - Valence
Introduction to Excel: Taught freshmen the fundamentals of Excel, covering data organization, formulas, and basic analytics.
Introduction to Relational Databases: Guided sophomore students through database concepts, including SQL queries, schema design, and normalization.
TeachingExcelSQLRelational DatabasesData Analysis
Education
Exchange Student in Computer Engineering
Fall 2014
Iowa State University - USA
Advanced Computer ArchitectureReconfigurable SystemsDistributed Software Development
Engineering Diploma - Embedded Software and Systems
09/2011 - 09/2014
Grenoble INP PHELMA/ENSIMAG - France
Engineering thesis: Vectorization of compression algorithms using SIMD instructions. Realtors: Prof. S. Viardot, Ing. R. Schulze, Dr. T. Willhalm. Thesis activity carried out during the final year project at SAP SE, Walldorf, Germany.
MathematicsProgrammingOperational ResearchOperating SystemsReal-Time Embedded SystemsHardware DesignC++SAP Hana
Skills
Programing
Java
JavaScript / TypeScript
SQL / MDX
Bash
C / C++
Frameworks
Spring Cloud Sleuth
Spring Boot
Expo
React/Next.js
Cloud Services
AWS - S3
Azure - Storage
Azure - Durable Functions
GCP - Vision API
Spoken languages
English
French
Arabic
Spanish
Publications
- Local Planning of Multiparty Interactions with Bounded Horizons
Authors: Mahieddine Dellabani, Jacques Combaz, Marius Bozga, Saddek Bensalem
FM 2016: 199-216
- Knowledge Based Optimization for Distributed Real-Time Systems
Authors: Mahieddine Dellabani, Jacques Combaz, Saddek Bensalem, Marius Bozga
APSEC 2017: 751-756
- Formal methods for distributed real-time systems. (Méthodes formelles pour les systèmes distribués temps-réel)
Authors: Mahieddine Dellabani
Grenoble Alpes University, France, 2018
- S BIP 2.0: Statistical Model Checking Stochastic Real-Time Systems
Authors: Braham Lotfi Mediouni, Ayoub Nouri, Marius Bozga, Mahieddine Dellabani, Axel Legay, Saddek Bensalem
ATVA 2018: 536-542
- Local Planning Semantics: A Semantics for Distributed Real-Time Systems
Authors: Mahieddine Dellabani, Jacques Combaz, Saddek Bensalem, Marius Bozga
Leibniz Trans. Embed. Syst. 6(1): 01:1-01:27 (2019)
Check out some of my work
Get in touch.
- mdellabani@gmail.com
- Location
- Saint-Médard, France
- Github
- mdellabani