Senior Full-Stack Engineer with 12+ years of experience building backend services, APIs, and web applications across fintech, healthcare, SaaS, and consumer platforms. Strong hands-on experience with Node.js, TypeScript, Python, React, Next.js, PostgreSQL, and distributed systems. Experienced in owning features end to end, from API and data-model design through frontend development, testing, deployment, observability, and production support. Background includes payment and transaction workflows, data-intensive applications, secure healthcare systems, third-party integrations, and performance-critical services.
MS
Open to opportunities
Michal Stefanow
@michalstefanow
Senior Full-Stack Engineer with 12+ years of experience building backend services, APIs, and web applications across fintech, healthcare, SaaS.
United KingdomExperience
Work history, roles, and key accomplishments
CA
Current
Senior Full Stack Engineer
Casedok
Apr 2025 - Present (1 year 5 months)
Develop end-to-end product capabilities for medical-record aggregation and legal case workflows using React, Next.js, TypeScript, Node.js, and Python. Build backend services with NestJS and FastAPI for patient records, document processing, and provider integrations.
ME
Senior Full Stack Engineer
Mesta
Sep 2023 - Mar 2025 (1 year 6 months)
Developed full-stack functionality for business accounts, fiat and stablecoin transactions, payment workflows, and financial operations using React, TypeScript, Node.js, and Python. Built NestJS services for account operations and payment-provider integrations.
KL
Built full-stack payment and checkout features using TypeScript, React, Node.js, and supporting backend services. Developed React and Next.js components for checkout and payment experiences with critical responsiveness and state management.
BR
Software Engineer
Bridebook
Jan 2017 - Apr 2019 (2 years 3 months)
Developed React and JavaScript features for wedding-planning workflows including venue and supplier discovery, planning tools, guest management, and user account experiences. Built Node.js and Express backend functionality and REST APIs.
Developed Python services and internal data-processing tools supporting engineering and operational workflows within a large distributed environment. Built and maintained internal APIs and JavaScript-based interfaces.
Education
Degrees, certifications, and relevant coursework
University of Manchester
MSc, Mathematics
2010 - 2013
Completed an MSc in Mathematics at the University of Manchester from 2010 to 2013.
AGH University of Krakow
MSc, Computer Science
2005 - 2010
Completed an MSc in Computer Science at AGH University of Krakow from 2005 to 2010.
Availability
Open to opportunities
Location
United KingdomAuthorized to work in
Job categories
Skills
NodeJSNestJSExpressJSPythonfastAPIDjangoREST APIsGraphQLMicroservicesEvent Driven ArchitectureReactNext.jsTypeScriptAngularRxJSJavaScriptRedux toolkitZustandVue.JsReact NativeTailwindPostgreSQLMySQLMongoDBRedisAWSGCPAzureDockerKubernetesCI CDGitlabJestCypressPlaywrightUnit TestingIntegration TestingEnd To End TestingSystem DesignAPI DesignDistributed SystemsPerformance OptimizationObservabilitySecurityOCRRole Based Access ControlHIPAAKYCKYB
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