Raymond Kalumba Joseph

Available to hire

js, and TypeScript. I excel at both front-end and back-end tech and thrive in collaborative, Agile environments.

About

I am a full stack software engineer with 6+ years of experience building scalable web and mobile applications using React, React Native, Node.js, and TypeScript. I excel at both front-end and back-end tech and thrive in collaborative, Agile environments.

I’m passionate about delivering high-performance solutions, mentoring teammates, and continuously learning new tools to solve real-world business problems.

  • Joined December 2025

Industry experience

  • Software & Internet
  • Professional Services
  • Media & Entertainment

Projects · 1

Work experience· 5 roles

Backend Software Engineer · Tek Juice UKMar 2025 – Present · 1 yr 9 mos

Architected and implemented a comprehensive rate-card system integrating 28+ providers with dynamic fee calculation algorithms, enabling accurate quote generation for buy/sell/mortgage transactions. Designed and implemented a case management integration that seamlessly converts quotes to legal cases, including client management, solicitor assignment, and automated workflow generation, reducing manual case setup time by 80%. Implemented RESTful APIs with standardized response formats, comprehensive validation, and automated testing, delivering 99.9% uptime and supporting concurrent quote generation and case management operations.

Full Stack Software Engineer & CTO · SwarmbyteApr 2022 – Dec 2024 · 2 yrs 9 mos

Defined technology strategy for a gamer's social media platform, leading to a 30% increase in user engagement. Built scalable backend infrastructure for 200 concurrent users using NestJS, TypeScript, and GraphQL. Integrated microservices with Kafka, reducing inter-service communication latency by 70%. Orchestrated microservices using Apollo Federation, enhancing developer efficiency by 40%. Collaborated with stakeholders to align system design with business objectives, contributing to revenue growth.

Full Stack Software Engineer · GitStart CommunityOct 2021 – Jan 2025 · 3 yrs 4 mos

Resolved over 150 complex UI and backend issues, enhancing performance by 40%. Transitioned to Project Manager, aligning stakeholders and dev teams on requirements, timelines, and deliverables. Developed robust RESTful APIs for a React Native frontend, efficiently handling 20,000+ concurrent users. Conducted code reviews ensuring 100% adherence to coding standards and best practices. Mentored junior developers, improving their productivity by 30% and authored comprehensive onboarding documentation, reducing ramp-up time by 25%.

React Developer · SMS ONE (U) LIMITEDJun 2021 – Jan 2022 · 8 mos
Full Stack Mobile Developer · The Golazo ProjectApr 2021 – Jun 2022 · 1 yr 3 mos

Education

Bachelor of Information Technology and Computing · Kyambogo University2017 – 2020
Bachelor of Information Technology and Computing · Kyambogo University2017 – 2020

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