Nadim Ouertani — Backend systems, distributed systems, microservices, and financial platforms. 7+ years building business-critical software across online gaming, financial services, real estate, logistics, and enterprise environments.
About
Senior Software Engineer with 7+ years of experience designing, developing, and modernizing business-critical software platforms across online gaming, financial services, real estate, logistics, and enterprise environments.
Experienced in backend engineering, distributed systems, microservices architecture, financial transaction platforms, technical leadership, mentoring engineers, code reviews, project estimation, and delivery across multicultural engineering organizations.
Primary stack
Skills
Experience
Aug 2025 - Present. Design and maintain backend services for deposits, withdrawals, wallet operations, betting workflows, and customer account management. Contribute to modernization from legacy systems into service-oriented architectures, Elasticsearch-powered operational search, production troubleshooting, code reviews, mentoring, and systems supporting more than $1M USD in monthly business activity.
Dec 2021 - Apr 2025. Designed a centralized CRM platform for sales, marketing, and lead management. Built a lead acquisition ecosystem connecting landing pages, marketing campaigns, CRM workflows, and third-party providers, with automation for campaigns, customer management, reporting, recruitment interviews, mentoring, architecture decisions, and production support.
Jan 2023 - Aug 2023. Project-based contract delivered alongside the full-time Real Estate Technology Company role with employer consent. Led modernization of a legacy monolithic platform into microservices, defining service boundaries and communication patterns while reducing technical debt and improving maintainability, scalability, and long-term engineering productivity.
Mar 2024 - Sep 2024. Project-based contract delivered alongside the full-time Real Estate Technology Company role with employer consent. Developed backend services using Python, FastAPI, and DynamoDB. Built scalable content distribution solutions used by European clients within cloud-native and API-driven architectures.
Jun 2021 - Dec 2021. Developed and maintained subscriber management platforms and customer-facing business applications. Built Laravel-based enterprise solutions supporting operational workflows and business users.
Jun 2019 - May 2021. Developed CMS solutions, websites, landing pages, and database-driven applications. Built full-stack web solutions using PHP, SQL, HTML, CSS, and JavaScript while working directly with business stakeholders.
Delivered a complete e-commerce platform in 3 months, including secure payment processing, inventory management, and production-ready business workflows.
Built a comprehensive multi-vendor e-commerce platform with integrated payment gateways and REST APIs for a Dubai media and marketing business.
Led ground-up development of Lebskom web and mobile e-commerce platform, using SOLID principles and maintainable backend architecture.
Engineering Approach
I start by understanding the domain, existing architecture, data flows, production constraints, and the real business impact of the system.
I break work into clear deliverables, estimate realistically, communicate tradeoffs, and keep alignment with product, QA, DevOps, and engineering leads.
I build maintainable services, APIs, integrations, and data workflows with attention to performance, reliability, security, and long-term change.
I use code reviews, testing, logging, debugging, and production validation to reduce risk before changes reach users or business-critical flows.
I support releases, investigate incidents, refactor legacy modules, mentor teammates, and improve systems so teams can move faster with less risk.
Background
University of Tunis El Manar, Tunisia
Professional Certification
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Blog
APIs are easy to expose, but production-grade APIs need contracts, validation, security, observability, and failure handling.
Read postLaravel can be used for serious backend systems when teams respect architecture, queues, transactions, testing, and domain boundaries.
Read postMicroservices can improve ownership and scalability, but they also add operational cost, network failure, and data consistency challenges.
Read postEngineering Tips
A public collection of Laravel, PHP, database, API, security, queues, Docker, and architecture questions written from practical backend engineering experience.
Open guideContact
Open to senior software engineer, senior backend engineer, and backend platform engineer roles across strong product and engineering teams.