Sebastian (K.) J.
Software Engineer (Backend)
Experience
May 2024 - Present
1 year 8 monthsNairobi, Kenya
Software Engineer (Backend)
Nathan Digital
- Designed and maintained RESTful APIs for mobile and web platforms.
- Integrated Redis caching, reducing API response times by 40%.
- Optimized MongoDB queries and indexing to improve performance.
- Automated deployments using Bitbucket Workflows, minimizing manual errors.
- Led root cause analyses and implemented fixes, improving customer retention by 30%.
- Reduced infrastructure costs through memory optimization and efficient resource management.
- Supported hybrid cloud deployments using AWS and Azure integrations.
- Created internal automation tools, cutting operational costs by 15%.
Nov 2022 - Jan 2024
1 year 3 monthsSoftware Engineer Apprentice
ALX Africa
- Built microservices using Python and Flask with robust testing.
- Automated workflows with shell scripts and Docker.
- Participated in code reviews and deployment troubleshooting.
Jun 2022 - Mar 2024
1 year 10 monthsSoftware Engineer & Instructor
Qubit Institute of Technology
- Developed and maintained a secure e-learning platform.
- Taught programming (Python, Java) with a focus on secure coding.
- Guided students in cloud deployments (AWS, Azure).
- Introduced CI/CD practices via GitHub Actions for reliable releases.
- Built demo applications in .NET and Java for backend and authentication training.
Jan 2021 - Apr 2021
4 monthsMachakos, Kenya
IT Support Intern
Machakos County Government
- Provided hardware and software support for staff systems.
- Assisted with data backups and network troubleshooting.
- Documented incidents and improved resolution tracking.
Summary
Software Engineer with 3+ years of experience building scalable, secure backend systems across cloud environments (AWS, Azure, OCI). Focused on performance optimization, automation, and production reliability. Passionate about maintainable code, incident prevention, and driving operational excellence in collaborative teams.
Languages
English
NativeSwahili
NativeGerman
ElementaryEducation
ALX Africa
Software Engineering Program · Software Engineering · Johannesburg, South Africa
Machakos University
Bachelor of Science in Information Technology · Information Technology · Machakos, Kenya
Certifications & licenses
Data Structures and Algorithms
FreeCodeCamp
Full Stack Software Engineering
ALX Africa
OCI Architect Associate
Oracle
OCI Autonomous Database Professional
Oracle
OCI Certified Foundations Associate
Oracle
Python Programming
HackerRank
React Learning Program
Andela
Need a freelancer? Find your match in seconds.
Try FRATCH GPT More actions
Similar Freelancers
Discover other experts with similar qualifications and experience
- English
- Deutsch
2025 © FRATCH.IO GmbH. All rights reserved.