C# Front Office Specialist | Capital Market Technologies at MARGO

Join Margo Group as a Full Stack Developer specializing in Java and React. We are seeking a talented and motivated individual to contribute to our innovative projects and help shape the future of our tech solutions. As part of our team, you will work closely with designers and product managers to refine our offerings and deliver high-quality software solutio…

Who are we?At MARGO, our consultants engage in what truly matters: complex projects that combine intellectual challenges with tangible business impacts. We support leading players in finance, industry, and technology in designing and developing high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why join the Software Engineering practice?You will be part of a team led by Paul Blois, our Practice Manager for the past 5 years. Working alongside them means gaining deep insights into the company, receiving close guidance in your career development, and contributing to demanding IT projects that have a significant impact for our clients.Your responsibilities- Design, develop, and optimize a Front Office risk management application covering various financial products.- Enhance and extend existing functionalities to meet real-time business requirements.- Tackle complex performance, algorithmic, and multithreading challenges.- Participate in the design of scalable and robust microservices architectures.- Ensure code quality, maintainability, and security across the solution.- Contribute to code reviews, continuous improvement, and sharing best practices.Languages: Java 17Associated Technologies: NoSQL, microservices, CI/CDChallenges: real-time, low latency, algorithmic complexity, distributed computing, processing large data volumes.Desired ProfileWe are looking for a Java Developer who is passionate about real-time systems and has an interest in financial markets, eager to thrive in complex, high-performance environments.- Master's degree (engineering school or university).- Strong skills in Java, multithreading, performance optimization, and development best practices (SOLID, unit tests).- Experience in developing critical systems, real-time data stream processing; finance experience is a plus.- Ability to solve complex technical problems and collaborate with multidisciplinary teams.

Who are we?At MARGO, our consultants focus on what truly matters: tackling complex projects that combine intellectual challenges with real business impacts. We support major players in finance, industry, and technology in designing and developing high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why join the Software Engineering Practice?You will be part of a team led by Paul Blois, Practice Manager at MARGO for five years. Working alongside them means benefiting from in-depth company knowledge, receiving close support for your career development, and contributing to demanding IT projects with significant impact for our clients.Your Responsibilities- Design, develop, and optimize a new web application for the reporting, tracking, and auditing of insiders (staff with access to sensitive information) for a major banking client.- Participate in defining and implementing a high-performing and scalable architecture.- Address performance optimization challenges in both front-end and back-end systems.- Ensure code quality, maintainability, and security of the solution.- Collaborate closely with product, security, and infrastructure teams for seamless integration.- Contribute to code reviews, continuous improvement, and the sharing of best practices.Languages: Java 17, TypeScriptAssociated frameworks and technologies: Spring Boot, Angular 12, Git, CI/CDChallenges: performance, response time optimization, robustness, and regulatory complianceDesired ProfileWe are looking for a full-stack developer who is passionate about real-time systems and interested in financial markets, eager to work in complex and high-performance environments.- Education level: Master’s degree (engineering school or university).- Strong skills in both back-end and front-end development, multithreading, performance optimization, and good development practices (SOLID, unit testing).- Experience in developing critical systems, real-time data stream processing; experience in finance is a plus.- Ability to solve complex technical problems.

Join our dynamic team at Margo Group as a Technical Architect specializing in Java for critical financial systems. In this role, you will lead the design and implementation of robust software solutions that power our financial markets operations. Your expertise will be pivotal in ensuring system reliability and performance.

About UsAt MARGO, our consultants focus on what truly matters: engaging in complex projects that blend intellectual challenge with real business impact. We support the most prominent players in finance, industry, and technology by designing and developing high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join the Software Engineering Practice?You will be part of a team led by Paul Blois, who has been the Practice Manager at MARGO for five years. Working alongside him means benefiting from an in-depth understanding of the company, receiving close mentorship in your career development, and contributing to demanding IT projects with significant impact for our clients.Your ResponsibilitiesYou will join a team of 12 professionals tasked with translating complex financial mechanisms into an elegant and resilient software architecture. At the heart of a leading energy company's market activities, you will design the contract modeling engine that manages the group’s risk exposure.As a Senior Python Developer, your challenges will include:- Architecture & Design: Developing and evolving APIs and microservices capable of modeling rich and varied contractual life cycles.- Engineering Excellence: Ensuring code quality and maintainability (Clean Code, extensive unit and integration testing) in an environment where even a minor miscalculation can have direct financial repercussions.- Domain Modeling: Collaborating with business experts to convert complex management rules (gas purchases, P&L tracking, European regulatory constraints) into high-performing data models.- Performance & Scalability: Optimizing services for the aggregation of massive data volumes necessary for real-time risk management tools.

UpSlide is the leading productivity and branding solution for financial services. Our innovative software significantly enhances the functionalities of PowerPoint, Word, Excel, and Power BI, enabling users from prestigious firms such as Citi, KPMG, and BNP Paribas to focus on high-value tasks rather than formatting or manual data entry. With over 160 employees, we are in a growth phase, with offices located in Paris (headquarters), London, New York, Singapore, and Berlin.Our Core Values Our values guide our approach to work and are central to our recruitment process. We seek individuals who resonate with the following principles:Excellence: Every detail matters, and we prioritize the quality of our deliverables.Trust: We are passionate, committed, and empowered to act autonomously.Well-being at Work: We maintain a positive outlook and share our enthusiasm with colleagues and clients alike.The Team ‍‍You will join the UpSlide development team, currently composed of 26 developers organized into 5 squads. Our missions for 2026 include:OfficeJS: Preparing UpSlide for the transition from Microsoft Office to Office JS.FA: Enhancing our product's superiority in the Financial Advisory sector.FA & AI: Strengthening our product's edge in Financial Advisory by focusing on AI-related solutions.IB & AM: Continuously improving our offerings for Investment Banking & Asset Management.Platform: Upgrading our infrastructure to support tenfold user growth.Join Us!

Who Are We?At MARGO, our consultants focus on what truly matters: tackling complex projects that combine intellectual challenges with real business impact. We partner with leading players in finance, industry, and tech to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join the Software Engineering Practice?You will be part of a team led by Paul Blois, our Practice Manager at MARGO for five years. Working alongside them means benefiting from extensive company knowledge, receiving close support in your professional growth, and contributing to demanding IT projects that have a significant impact on our clients.Your ResponsibilitiesYou will collaborate closely with research and business teams, enabling regular feedback and participation in various strategic changes. The goal is to transform, migrate, and optimize the tools we use.As a Python R&D Developer, your tasks will include:- Developing and adding new features using Python and C++- Participating in the redesign and optimization of various tools- Adhering to development standards and code quality- Implementing tests to reduce technical debt and improve Time to Market- Tackling technical challenges such as real-time processing, parallelization, and high data volumeYou will have the opportunity to grow in an agile and human-sized environment where technical excellence and coding best practices are at the heart of our activities.Technical challenges include algorithmic complexity, real-time performance, optimization, and scalability.Technical Stack: Back End: C++ and Python; Front End: JavaScript; Unix/Linux Environment.

About UsAt MARGO, our consultants focus on what truly matters: complex projects that blend intellectual challenges with significant business impact. We partner with leading players in finance, industry, and technology to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join Our Software Engineering Practice?You will work alongside an experienced team led by Paul Blois, Practice Manager at MARGO for 5 years, and Prosper Gratian, Practice Lead and C++ Developer. Collaborating with them means benefiting from in-depth company knowledge, receiving close mentorship for your career growth, and contributing to demanding IT projects that have a high impact on our clients.Your Responsibilities- Design, develop, and optimize high-performance C++ components.- Participate in the migration of critical applications.- Contribute to the establishment of an internal framework for cross-functional applications.- Ensure code quality, performance, and maintainability.- Engage in code reviews, continuous improvement, and sharing best practices.Technical Stack: Modern C++ (C++17/20)Associated tools and technologies: Kafka, ElasticSearch, Git, CI/CD, AWS.Challenges: Performance, robustness, and managing large data volumes (processing 9 billion messages).Desired ProfileWe are looking for a passionate C++ developer with an interest in real-time systems and financial markets, eager to thrive in complex, high-performance environments.- Master's degree (engineering school or university).- Strong skills in C++, multithreading, performance optimization, and development best practices (SOLID, unit testing).- Experience in critical systems development and real-time data stream processing.

About UsAt MARGO, our consultants focus on what truly matters: intricate projects that combine intellectual challenges with real business impact. We partner with leading players in finance, industry, and technology to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join the Software Engineering Practice?You will be part of a team led by Paul Blois, our Practice Manager for the past five years. Collaborating with him means benefiting from his in-depth knowledge of the firm, receiving close mentorship for your personal development, and contributing to demanding IT projects that have a significant impact on our clients.Your ResponsibilitiesJoin an international team of electronic trading experts dedicated to developing high-performance market solutions. Your tasks will include:- Designing and enhancing trading bots capable of executing complex real-time strategies.- Optimizing performance (latency, multithreading) and managing high data volumes.- Ensuring robust C# code, adhering to SOLID principles, with testing and code reviews.- Contributing to the management of Cloud infrastructures (Azure) and data security.Candidate ProfileWe are looking for a C# developer passionate about real-time systems and interested in market finance, eager to thrive in complex, high-performance environments.- Educational background: Master’s degree (engineering school or university).- Strong skills in C#, multithreading, performance optimization, and best development practices (SOLID, unit testing).- Experience in developing critical systems, processing real-time data streams; experience in finance is a plus.- Ability to solve complex technical problems and collaborate with multidisciplinary teams.- Enthusiasm for demanding environments.

Who are we?At MARGO, our consultants engage in what truly matters: intricate projects that merge intellectual challenges with direct impact on financial markets. This is why we support major players in market finance with their most strategic initiatives in real-time systems, trading, risk management, and automation of the financial product lifecycle.Why join the Capital Market Technologies practice?You will be part of a team led by Christophe El Harake, Practice Manager of Capital Market Technologies at MARGO, a former Business Analyst at BNP, ENGIE, and Amundi. Working alongside him means joining a group of passionate experts, receiving top-tier mentorship, being challenged both technically and methodologically, and contributing to projects with significant impact on financial markets.Your MissionsWe are currently seeking an IT Quant specialized in Algorithmic Trading to work with a leading investment bank. You will be part of an international team of IT Quants, algo traders, and data experts, working on strategic projects at the heart of electronic trading.You will contribute to major projects for the Front Office, including:- Developing and optimizing new trading models and algorithms in direct collaboration with algo trading teams;- Implementing real-time tools for strategy monitoring and performance analysis;- Utilizing and valuing market data through KDB+ and high-performance environments;- Backtesting and validating trading models prior to production deployment;

JOIN MARGOMARGO is a consulting firm specializing in Data, AI, and Software Engineering, established in 2005. With a presence in France and internationally, we bring together top experts to tackle the most intriguing technical challenges for our demanding clients. MARGO aims to become a key player in AI, solidifying our client relationships and expanding our premium positioning among new market entrants.YOUR ROLE AS A TALENT ACQUISITION SPECIALISTDiscovering Top Talent: You will recruit high-level technical and business profiles for MARGO’s strategic teams, focusing on dynamic and curious individuals. You will cultivate and engage your network, target candidates across various platforms, and inspire them to learn more about MARGO, encouraging them to meet with us.Managing the Recruitment Process: Each recruitment process is a challenge! You will be responsible for sourcing candidates, evaluating them through phone pre-qualifications, and guiding them through the entire recruitment journey from start to finish.Representing MARGO’s Image: You understand the importance of the candidate experience! You are committed to treating all candidates with kindness and take joy in providing feedback to help them improve.Integrating Your Colleague: Employee retention begins as soon as they sign their contract! You will develop the relationship with your new hire before their arrival and implement an effective onboarding process.Being a Talent Acquisition Specialist at MARGO also means choosing to:- Engage in all stages of the recruitment process- Collaborate with various stakeholders- Thrive in a dynamic and challenging environment- Recruit high-value profiles- Work for a company that values its human capital.

Join our dynamic team at Magellan Partners as a Full Stack Java Developer! In this role, you will be responsible for designing, developing, and maintaining innovative software applications using Java technologies. You will work collaboratively with cross-functional teams to deliver high-quality solutions that meet our clients' needs.As a Full Stack Developer, you will leverage your expertise in both front-end and back-end development to create user-friendly applications. This is an exciting opportunity to enhance your skills and contribute to impactful projects in a fast-paced environment.

About UsAt MARGO, our consultants engage in what truly matters: complex projects that merge intellectual challenge with real business impact. We support leading players in finance, industry, and technology on their most strategic endeavors in Data Science, Machine Learning, and Artificial Intelligence.Why Join the AI Practice?You will be part of a team led by Hamza Bouanani, Practice Manager of AI at MARGO and Lead Data Scientist at BNP Paribas. Working alongside him means joining a passionate team of experts, being technically and methodologically challenged, and contributing to high-impact projects for our clients.Your ResponsibilitiesWe are currently seeking a Data Scientist for a prominent French industrial group. Your role will involve multiple projects:- Pricing Project* Scale price optimization* Estimating the impact of price variations and providing recommendations to maximize group sales and margins* Optimizing prices in line with business constraints through direct interaction with various departments* Participation in production implementation- Customer Segmentation Project* Enhancing data quality to optimize marketing campaign targeting* Developing simple, robust, and efficient classification and regression models- Recommendations* Defining and implementing targeted discounts to retain customers* Creating decision support tools for sales personnel, integrating recommendations on clients and products* Collaborating closely with departments to assess the impact and ROI of recommendations- Your role will also include:* Needs assessment and definition phase with end users* R&D phase: data analysis, testing, and development of effective models* Validation with departments and production implementation with data engineering teams* Monitoring and following up on models via Databricks dashboards.

Join Margo Group as a Data Scientist or Machine Learning Engineer within our cutting-edge Practice IA MARGO team. In this role, you will leverage your analytical skills and machine learning expertise to drive innovative solutions that enhance our data-driven decision-making processes.You will collaborate with cross-functional teams, harnessing data to create predictive models and actionable insights that contribute to the success of our projects.

Your Responsibilities :As a Java JEE Developer / Software Engineer (H/F), you will collaborate with an agile team to drive back-end or full-stack development for one of our esteemed clients, focusing on:Analyzing architecture to ensure improvements meet expectations.Developing analytical tools for delivered components.Creating new features on a new platform compatible with current architecture.Automating testing procedures.Additionally, you will be involved in:User demonstrations.Integration testing.Production delivery (coordinating with infrastructure and security teams).Web and server development (NGINX, Apache, Tomcat, ...).Production and operational deployment procedures.Continuous integration (Jenkins, GitLab, Bitbucket, ...).Continuous deployment (Ansible, AWX, Octopus, GitLab, ...).Creating and participating in test cases.

ABOUT USAt MARGO, our consultants tackle meaningful challenges through complex projects that blend intellectual rigor with real business impact.We support leading players in finance, industry, and technology on their most strategic initiatives in Data Science, Machine Learning, and Artificial Intelligence.WHY JOIN THE CLOUD TRANSFORMATION PRACTICE?You will work within a team guided by a dedicated Practice Manager at MARGO, who is also deployed at one of our client sites.Collaborating with them means joining a passionate team of experts, facing technical and methodological challenges, and contributing to high-impact projects for our clients.YOUR RESPONSIBILITIESWe are currently seeking a Data Engineer to work with one of our clients in the energy sector within a cross-functional data team. This role encompasses various use cases arising from different departments (trading, data, HR, etc.).Your primary task will be to provide the foundational IT and Data components that serve all teams.In practical terms, our team is looking for Data Engineers and Data profiles capable of contributing to these impactful cross-functional projects.Main Responsibilities:- Support other teams in their data/AI projects- Engage in cross-functional interventions to accelerate and industrialize use cases- Deploy and launch data/AI projects into production- Work with modern technologies and enhance skills in AWS cloud- Make a direct impact on concrete topics such as energy transition, energy mix, and ecology—subjects that matter- Work alongside high-caliber colleagues (high seniority level)- Focus on continuous optimization- Handle large volumes and diverse data sets- Participate in a significant DATA transformationWHAT WE ARE LOOKING FORWe are looking for demanding engineers and data engineers who are passionate about technology and eager to thrive in complex environments.- Graduated from an engineering school or a Master's degree (Bac +5);- Proficient in Python, PySpark, Scala, AWS, Databricks, and SQL- Good command of English to operate in an international environment.WHAT WE OFFER- Ambitious and varied projects, always selected for their added value;- Close support from recognized experts;- ...

About UsAt MARGO, our consultants focus on what truly matters: tackling complex projects that combine intellectual challenges with real business impact.This is why we support leading players in finance, industry, and technology on their most strategic projects in Data Science, Machine Learning, and Artificial Intelligence.Why Join the AI Practice?You will be part of a team led by Hamza Bouanani, the AI Practice Manager at MARGO, and Lead Data Scientist at BNP Paribas.Working alongside him means joining a team of passionate experts, being technically and methodologically challenged, and contributing to high-impact projects for clients.Your ResponsibilitiesWe are seeking a Machine Learning Engineer to join our teams and engage at the heart of our clients' Data strategies (Industry, Finance, Energy). Your primary objective will be to industrialize Machine Learning algorithms and ensure their production lifecycle.You will operate on three major technical axes:1. Industrialization & Deployment (Model Serving)- Transforming research models (Proof of Concept) into robust, tested, and optimized production code.- Developing high-performance APIs (FastAPI, Flask) to expose models to business applications.- Containerizing solutions (Docker) and orchestrating on clusters (Kubernetes) to ensure scalability and high availability.2. MLOps Architecture & Automation- Designing and maintaining CI/CD pipelines dedicated to Machine Learning (automated retraining, model validation).- Implementing and managing data flow orchestration tools (Airflow, Kubeflow, Dagster).- Managing versioning of data and models (DVC, MLflow) to ensure reproducibility of experiments.

About UsAt CryptoNext Security, we are pioneers in the realm of deep technology, focusing on post-quantum cryptography. Our innovative solutions empower businesses and institutions to safeguard their data against the impending challenges posed by quantum computing. We proudly collaborate with prominent clients across sectors such as finance, defense, and telecommunications.Your Daily ResponsibilitiesCraft and implement dynamic user interfaces utilizing React for our advanced post-quantum cryptography products.Work collaboratively with Product and Backend teams to deliver a seamless and user-friendly experience.Enhance performance while ensuring cross-browser and cross-device compatibility.Integrate REST APIs to facilitate interaction with backend services.Engage in code reviews and uphold best practices, including unit testing, continuous integration, and comprehensive documentation.Propose enhancements to frontend architecture through technological upgrades and refactoring.Foster improvements in our products beyond your typical responsibilities.Adhere to our frontend team principles: “Done over perfect” / we prioritize speed: KISS, DRY (Don't Repeat Yourself), SOLID.Essential SkillsProficient in React / Next.js along with its ecosystem (React Hooks, Context API).Solid understanding of TypeScript and fundamental programming principles.Experience with modern UI libraries such as Tailwind or chadcn/ui.Proven track record in integrating REST APIs.Strong knowledge of frontend performance optimization and related tools (Webpack, Vite, Core Web Vitals).Familiarity with frontend testing frameworks like Jest, React Testing Library, and Cypress.Competence in Git, CI/CD pipelines, and DevOps for automated integration and deployment.Desirable SkillsExperience with gRPC.Understanding of secure coding practices and application security.Basic knowledge of cryptography and cybersecurity.Experience in a startup or deeptech environment.Join Our TeamYou will become a key member of our R&D team, collaborating closely with backend developers, product managers, and UX/UI designers. You will report to the team lead and work with various departments to develop high-performance, user-centric interfaces that align with our clients' needs.Application ProcessInitial conversation with our HR team to discuss your background and motivations.Technical interview to assess your skills and fit for the role.

Who are we?At MARGO, our consultants engage in what truly matters: complex projects that blend intellectual challenges with real business impact. We collaborate with leading players in finance, industry, and technology to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why join the Software Engineering Practice?You will be part of a newly established team led by Paul Blois, Practice Manager at MARGO for the past 5 years. Working alongside him means gaining in-depth knowledge of the company, receiving close guidance in your professional development, and contributing to demanding IT projects with significant impacts for our clients.Your missionsYou will join a newly formed team at a leader in the energy sector, tasked with designing an algorithmic trading platform dedicated to battery energy storage. This strategic project aims to stabilize the electrical grid by injecting energy during peak consumption.As a C# Developer, you will contribute to building a robust, scalable, and high-performance solution capable of managing assets across Europe and the United States.Your responsibilities include:- Trading Engine Development: Design the software components enabling algorithmic trading in Intraday markets.- Asset Optimization: Implement and run complex optimization models (considering weather, market prices, and consumption profiles).- Backtesting Platform: Develop a secure and efficient environment for traders to test and validate their algorithmic strategies.- Scalability & Evolvability: Participate in the architecture of a solution initially focused on batteries but eventually designed to integrate the entire renewable energy portfolio (wind, hydro, thermal).