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Abdul Raffay Software Engineer | Backend, Cloud & DevOpsAR

Abdul Raffay

Software Engineer | Backend, Cloud & DevOps
  • Suggested rate
    €300 / day
  • Experience0-2 years
  • Response rate100%
  • Response time1 hour
The project will begin once you accept Abdul's quote.
Location and workplace preferences
Location
Karachi, Pakistan
Remote only
Primarily works remotely
Verifications

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4Repos
0Gists
Languages
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Skill set
Abdul in a few words

Software Engineer | Backend, Cloud, DevOps, and Full-Stack Development


I build scalable, high-performance, and resilient backend systems and full-stack applications that drive business success and impact crucial business KPIs. With expertise in backend engineering, cloud infrastructure, and DevOps, I design and optimize architectures for cost efficiency, reliability, and long-term growth, while keeping UX as the main priority. My business degree and early-stage startup experience allow me to take a product-focused approach, ensuring technical solutions align with business goals while keeping your cloud bill as low as possible.

What I Offer

Backend Engineering

  • RESTful APIs, GraphQL, gRPC, WebSockets
  • Authentication (JWT, OAuth2, HMAC, SAML, LDAP)
  • Event-driven architectures, background job processing
  • Caching strategies, Microservices

Full-Stack Development

  • API-driven web-facing or desktop-facing applications
  • Efficient frontend-backend communication
  • Optimized database interactions
  • End-to-end system design and architecture

Cloud Architecture

  • Scalable, distributed systems
  • Cloud-native application design
  • Multi-region and availability zone deployments
  • Cost optimization and provider comparisons including cost-benefit analysis with VPS and on-prem setups
  • Protection against vendor lock-in

DevOps & Automation

  • CI/CD pipelines
  • Infrastructure as code
  • Containerization and orchestration
  • Monitoring, logging, and tracing

Performance Optimization and Security

  • Database indexing and query optimization
  • Caching layers
  • Async processing and distributed cluster computing
  • Preventing memory leaks

Databases & Storage

  • PostgreSQL, Redshift, Amazon Aurora, MySQL, SQLite, MongoDB, Cassandra, Redis, S3
  • Cloud or on-prem backup and recovery strategies
Experience
  • Visualystcs Pvt Ltd
    DevOps and Cloud Engineer
    April 2024 - Today (1 year and 2 months)
    United Arab Emirates
    Designed, developed, and maintained scalable backend services, AWS cloud infrastructure, CI/CD pipelines, and data processing workows to optimize performance and automation.

    ● Backend Development: Built and maintained Python-based backend services for data-intensive
    applications, ensuring efficient API interactions with data pipelines.
    ● Cloud Infrastructure: Managed AWS services (EC2, S3, Lambda) for scalable data processing and
    storage solutions
    ● CI/CD Automation: Designed and deployed CI/CD pipelines using GitHub Actions and Docker to
    streamline automated cloud deployments
    ● Data Pipelines: Developed AWS data pipelines for data cleaning and transformation, ensuring
    high-quality data integration with analytical tools used by the Data Team
  • Ccodez Pvt Limited
    Software Developer
    March 2023 - March 2024 (1 year)
    Pakistan
    Developed and optimized Golang and Node.js APIs, built secure backend systems, and provided cloud consultancy to potential clients. Automated deployments with DevOps practices, created CI/CD pipelines from scratch, and optimized VPS deployments. Collaborated with frontend teams to build full-stack web applications, enhancing performance and user experience


    ● Backend and API Development: Built and maintained backend services using Node.js, Python, and Golang, developing RESTful and GraphQL APIs with secure authentication (JWT, OAuth2, HMAC). Improved backend performance and user
    experience while ensuring OWASP Top 10 security best practices.

    ● Cloud Consultancy & Server Management: Consulted with clients on VPS and managed cloud solutions (Hetzner, Digital Ocean, AWS), conducting cost-benefit analyses tailored to their requirements and existing systems. Deployed, managed, and optimized cloud and VPS environments for performance, security, and cost efficiency, ensuring robust monitoring and observability

    ● CI/CD & DevOps: Architected CI/CD pipelines with GitHub Actions and Docker Stack, integrating Terraform and monitoring tools for seamless automated deployments, Logs and performance analysis along with benchmarking for our DevOps and Cloud Solutions Clients

    ● Full-Stack Development: Built and managed full-stack web based applications, mainly developing and integrating backend APIs with react based frameworks working with frontend devs for our Web Development Clients.
Recommendations
Education
  • Bachelors in Applied Sciences (Hons.)
    Oxford Brookes University
    2025
    Bachelors in Applied Sciences (Hons.)
Certifications