Senior Fullstack Developer | Scalable Web Applications, Cloud Backends & Modern Frontend Architecture Results-driven Fullstack Software Engineer with
Aktualisiert am 30.09.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 28.09.2026
Verfügbar zu: 100%
davon vor Ort: 0%
ASP.NET
React
Express
Next.js
Tailwind CSS Backend: C#
ASP.NET Core
Node.js
Express.js API & Architektur: RESTful APIs
Microservices
System Design
English
C1 / Full Professional Proficiency
German
Native / C2
Indonesian
Basic / A2

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

2026 ? Present: Engineered scalable real-time service modules and high-performance full-stack web interfaces


Role: Software Engineer & Systems Specialist

Customer: Akiyam Solutions | Remote


Tasks:

  • Engineered scalable real-time service modules and high-performance full-stack web interfaces within an agile, distributed engineering environment.
  • Implemented modular, event-driven service architectures and integrated WebSocket data streams for low-latency client-server synchronization.
  • Conducted comprehensive code reviews, enforced strict Clean Code / SOLID guidelines, and maintained test coverage across core application components.

2023 ? Present: Architected, developed, and deployed end-to-end full stack web platforms


Role: Senior Full Stack Web Developer & Contractor, Freelance / Contract (Freelancermap & International Clients) | Remote


Tasks:

  • Architected, developed, and deployed end-to-end full stack web platforms and multi-tenant SaaS dashboards for international clients, achieving 99.9% application uptime.
  • Designed high-throughput RESTful & GraphQL APIs in ASP.NET Core and FastAPI; reduced server-side query latency by 40% through Redis caching and PostgreSQL query optimization.
  • Built modular, type-safe frontend client applications using React.js, TypeScript, and Next.js, cutting initial page load times (LCP) by 35% via server-side rendering and asset bundling.
  • Engineered robust relational schemas and EF Core database migrations across MS SQL Server and PostgreSQL, enforcing strict ACID compliance and automated schema backups.
  • Implemented enterprise-grade security protocols, including OAuth2, JWT token rotations, role-based access control (RBAC), and defense against CSRF/XSS vulnerabilities.
  • Automated continuous integration and zero-downtime deployment pipelines using GitHub Actions, Docker containers, and Nginx reverse proxies on dedicated Linux VPS hosting.
  • Integrated mission-critical third-party services, including Stripe & PayPal billing webhooks, automated transaction logging, and transactional email systems.

Multi-Tenant Enterprise SaaS Management Suite


Tasks:

  • Architected full-stack enterprise web portal (ASP.NET Core, React, TypeScript, PostgreSQL) with granular RBAC, multi-tenant database partitioning, automated billing integration, and real-time operational telemetry dashboards.

High-Throughput Microservices & REST API Suite


Tasks:

  • Built asynchronous Python/FastAPI and .NET Core microservices handling high-concurrency tasks, background worker queues via Redis, and comprehensive OpenAPI / Swagger automated documentation.

Dynamic Headless B2B Web Platform


Tasks:

  • Engineered Next.js / TypeScript frontend featuring server-side rendering (SSR), Tailwind CSS design system, automated CI/CD deployment via Docker, and integration with cloud databases.

Aus- und Weiterbildung

Aus- und Weiterbildung

Continuous Engineering Studies: Advanced Software Architecture, Distributed Systems, Microservices, and Cloud Computing (Azure / AWS).

Kompetenzen

Kompetenzen

Top-Skills

ASP.NET React Express Next.js Tailwind CSS Backend: C# ASP.NET Core Node.js Express.js API & Architektur: RESTful APIs Microservices System Design

Produkte / Standards / Erfahrungen / Methoden

PROFESSIONAL SUMMARY

Senior Full Stack Web Developer with 3+ years of enterprise-level contract and freelance experience engineering mission-critical web applications, high-throughput microservices, and modern responsive user interfaces. Expert in architecting clean, maintainable backend ecosystems using C# (.NET Core / ASP.NET), Python (FastAPI), and Node.js alongside high-performance frontends in React.js and TypeScript. Proven record of optimizing API latencies by up to 40%, managing complex SQL/NoSQL architectures, deploying Dockerized CI/CD pipelines on Linux VPS / Azure infrastructure, and adhering strictly to SOLID, DDD, and OWASP security standards. 


TECHNICAL SKILLS & KEYWORD MATRIX

Backend Architecture:

C#, .NET 8 / ASP.NET Core (Web API, Minimal APIs, MVC), Entity Framework Core (EF Core), Python (FastAPI, Flask), Node.js (Express), Microservices, RESTful APIs, GraphQL, WebSockets, gRPC 


Frontend Engineering:

TypeScript, JavaScript (ES6+), React.js, Next.js (App Router, SSR/SSG), State Management (Redux Toolkit, Zustand, React Query/TanStack), HTML5, CSS3/SASS, Tailwind CSS, Responsive & Mobile-First UI, WCAG Accessibility 


Databases & Caching:

PostgreSQL, Microsoft SQL Server, MySQL, MongoDB, Redis (Distributed Caching & Session Store), Database Normalization, Indexing & Query Plan Optimization, Migrations 


DevOps, Cloud & Infrastructure:

Docker, Docker Compose, Linux Server Administration (Ubuntu/Debian), Nginx (Reverse Proxy & SSL), Microsoft Azure (App Services, Blob Storage), AWS (S3, EC2), CI/CD (GitHub Actions), Git / GitHub 


Quality, Testing & Security:

Clean Architecture, Domain-Driven Design (DDD), SOLID Principles, Unit & Integration Testing (xUnit, Jest), Test-Driven Development (TDD), OAuth2, JWT Authentication, RBAC, CORS, OWASP Top 10 Compliance 


Methodologies:

  • Agile / Scrum
  • Test-Driven Development (TDD)
  • Continuous Integration & Deployment (CI/CD)
  • Git Flow
  • Pair Programming & Code Reviews

Datenbanken

PostgreSQL
Microsoft SQL Server
MySQL
MongoDB
Redis

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

2026 ? Present: Engineered scalable real-time service modules and high-performance full-stack web interfaces


Role: Software Engineer & Systems Specialist

Customer: Akiyam Solutions | Remote


Tasks:

  • Engineered scalable real-time service modules and high-performance full-stack web interfaces within an agile, distributed engineering environment.
  • Implemented modular, event-driven service architectures and integrated WebSocket data streams for low-latency client-server synchronization.
  • Conducted comprehensive code reviews, enforced strict Clean Code / SOLID guidelines, and maintained test coverage across core application components.

2023 ? Present: Architected, developed, and deployed end-to-end full stack web platforms


Role: Senior Full Stack Web Developer & Contractor, Freelance / Contract (Freelancermap & International Clients) | Remote


Tasks:

  • Architected, developed, and deployed end-to-end full stack web platforms and multi-tenant SaaS dashboards for international clients, achieving 99.9% application uptime.
  • Designed high-throughput RESTful & GraphQL APIs in ASP.NET Core and FastAPI; reduced server-side query latency by 40% through Redis caching and PostgreSQL query optimization.
  • Built modular, type-safe frontend client applications using React.js, TypeScript, and Next.js, cutting initial page load times (LCP) by 35% via server-side rendering and asset bundling.
  • Engineered robust relational schemas and EF Core database migrations across MS SQL Server and PostgreSQL, enforcing strict ACID compliance and automated schema backups.
  • Implemented enterprise-grade security protocols, including OAuth2, JWT token rotations, role-based access control (RBAC), and defense against CSRF/XSS vulnerabilities.
  • Automated continuous integration and zero-downtime deployment pipelines using GitHub Actions, Docker containers, and Nginx reverse proxies on dedicated Linux VPS hosting.
  • Integrated mission-critical third-party services, including Stripe & PayPal billing webhooks, automated transaction logging, and transactional email systems.

Multi-Tenant Enterprise SaaS Management Suite


Tasks:

  • Architected full-stack enterprise web portal (ASP.NET Core, React, TypeScript, PostgreSQL) with granular RBAC, multi-tenant database partitioning, automated billing integration, and real-time operational telemetry dashboards.

High-Throughput Microservices & REST API Suite


Tasks:

  • Built asynchronous Python/FastAPI and .NET Core microservices handling high-concurrency tasks, background worker queues via Redis, and comprehensive OpenAPI / Swagger automated documentation.

Dynamic Headless B2B Web Platform


Tasks:

  • Engineered Next.js / TypeScript frontend featuring server-side rendering (SSR), Tailwind CSS design system, automated CI/CD deployment via Docker, and integration with cloud databases.

Aus- und Weiterbildung

Aus- und Weiterbildung

Continuous Engineering Studies: Advanced Software Architecture, Distributed Systems, Microservices, and Cloud Computing (Azure / AWS).

Kompetenzen

Kompetenzen

Top-Skills

ASP.NET React Express Next.js Tailwind CSS Backend: C# ASP.NET Core Node.js Express.js API & Architektur: RESTful APIs Microservices System Design

Produkte / Standards / Erfahrungen / Methoden

PROFESSIONAL SUMMARY

Senior Full Stack Web Developer with 3+ years of enterprise-level contract and freelance experience engineering mission-critical web applications, high-throughput microservices, and modern responsive user interfaces. Expert in architecting clean, maintainable backend ecosystems using C# (.NET Core / ASP.NET), Python (FastAPI), and Node.js alongside high-performance frontends in React.js and TypeScript. Proven record of optimizing API latencies by up to 40%, managing complex SQL/NoSQL architectures, deploying Dockerized CI/CD pipelines on Linux VPS / Azure infrastructure, and adhering strictly to SOLID, DDD, and OWASP security standards. 


TECHNICAL SKILLS & KEYWORD MATRIX

Backend Architecture:

C#, .NET 8 / ASP.NET Core (Web API, Minimal APIs, MVC), Entity Framework Core (EF Core), Python (FastAPI, Flask), Node.js (Express), Microservices, RESTful APIs, GraphQL, WebSockets, gRPC 


Frontend Engineering:

TypeScript, JavaScript (ES6+), React.js, Next.js (App Router, SSR/SSG), State Management (Redux Toolkit, Zustand, React Query/TanStack), HTML5, CSS3/SASS, Tailwind CSS, Responsive & Mobile-First UI, WCAG Accessibility 


Databases & Caching:

PostgreSQL, Microsoft SQL Server, MySQL, MongoDB, Redis (Distributed Caching & Session Store), Database Normalization, Indexing & Query Plan Optimization, Migrations 


DevOps, Cloud & Infrastructure:

Docker, Docker Compose, Linux Server Administration (Ubuntu/Debian), Nginx (Reverse Proxy & SSL), Microsoft Azure (App Services, Blob Storage), AWS (S3, EC2), CI/CD (GitHub Actions), Git / GitHub 


Quality, Testing & Security:

Clean Architecture, Domain-Driven Design (DDD), SOLID Principles, Unit & Integration Testing (xUnit, Jest), Test-Driven Development (TDD), OAuth2, JWT Authentication, RBAC, CORS, OWASP Top 10 Compliance 


Methodologies:

  • Agile / Scrum
  • Test-Driven Development (TDD)
  • Continuous Integration & Deployment (CI/CD)
  • Git Flow
  • Pair Programming & Code Reviews

Datenbanken

PostgreSQL
Microsoft SQL Server
MySQL
MongoDB
Redis

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