Raymond Kalumba Joseph

Open to work

Full Stack Software Engineer | Building Scalable Web and Mobile Applications with TypeScript, React, React Native, Node.

Kampala, Uganda · 7 years of experience

About

Highly skilled Full Stack Engineer with 6+ years of experience in the software development industry. Proven ability to work well in teams, excellent communication skills, and a commitment to improving production processes.

Experience

Full Stack Software Engineer
Bondex
Jan 2026 – Sep 2026 · Miami, Florida, United States
• Ship features across Bondex’s hiring ecosystem: web, APIs, and platform services, in TypeScript, React, Node.js, and Ruby. • Own production reliability work end-to-end: diagnose live issues, ship fixes, and harden listing/auth flows used by real users • Build and maintain OIDC-based auth so Bondex and partner products (e.g., Remote3) share secure sign-in and session handling. • Contribute to system design and delivery for multi-product platform work spanning services, data sync, and frontend surfaces
Backend Software Engineer & Dev Ops
Tek Juice
Mar 2025 – Mar 2026 · Leicester LE15FQ
• Case management & workflows, Designed and implemented quote-to-case integration: converting accepted quotes into legal cases with client records, solicitor assignment, and automated workflow/milestone generation, cutting manual case setup time by ~80%. • Conveyancing pricing engine. Architected and built a rate card layer for a conveyancing platform, integrating 28+ provider rate cards with dynamic fee calculation (buy / sell / remortgage), enabling consistent, accurate quotes at scale. • APIs, quality & operations. Delivered RESTful services with standardized responses, strong validation, and automated tests; supported reliable production operations (deployments, environments, observability) so quote and case-management workloads run concurrently with minimal downtime. • Integrations & platform. Contributed to HMRC SDLT (Transaction Engine / XML) flows, document storage and listing (S3, presigned URLs), and staging/production pipelines, improving end-to-end reliability for regulated, document-heavy workflows.
Lead Engineer
SwarmByte
Apr 2022 – Dec 2024 · Kampala, Central Region, Uganda
• As Co-Founder & CTO, defined and executed the end-to-end technology vision for SwarmByte, a scalable gaming social media platform, translating business objectives into a scalable technical roadmap. • Architected and built the core platform using a microservices backend orchestrated via Apollo Federation (GraphQL) and Kafka, improving developer efficiency by 30% and enabling seamless feature deployment. • Built and led the technical team, fostering a culture of high ownership. Actively mentored and unblocked engineers, ensuring rapid iteration from scoping through to production deployment. • Key partner to the CEO (co-founder) and product lead, ensuring all system design and technical priorities directly drove core business metrics and user growth. • Collaborated with stakeholders to align system design with business objectives, driving the development process from scoping to execution.
Full Stack Software Engineer
GitStart Community (YC S19)
Oct 2021 – Jan 2025 · San Francisco, CA
• Transitioned into a Project Manager role, bridging communication between stakeholders and dev teams to align on requirements, timelines, and deliverables. • Resolved UI and backend tickets related to bugs, performance, and scalability. • Reviewed code, and provided constructive feedback to ensure code adhered to coding standards. • Provided guidance to other developers to help them overcome blockers and improve their skills. • Documented code changes, related to client instances, ensuring they are maintainable.
React Developer
SMS ONE (U) LIMITED
Jul 2021 – Jan 2022 · 1-3 Lower Kololo Terrace Rd, Kampala
• Developed a reporting system with effective visualization of data for the Ministry of Education. • Improved maintainability by replacing Redux with Apollo-Client. • Implemented HOC architecture to reuse GraphQL listing and filtering capabilities.
Mobile Application Developer
The Golazo Project
Apr 2021 – May 2022 · Kampala, Central Region
• Worked closely with Product Managers to establish product requirements. • Led a team of four developers and played a critical role in the successful launch of a Gigs startup. • Implemented efficient real-time updates for the live app state using WebSockets.
Full Stack Developer
GlobalIT Business Solutions Limited
Nov 2019 – Nov 2020 · Thobani Centre Building Kampala Road,
• Developed an e-commerce system using the X-Cart platform. • Designed databases and integrated APIs for multiple applications. • Utilized Unified Modeling Language to make implementation decisions. • Implemented designs to meet project goals and deliverables. • Documented software development methodologies in technical manuals for future use•
Junior React Native Developer
Interlet Limited
May 2018 – Jan 2019 · Kampala, Central Region, Uganda
• Contributed to the development of mobile applications for clients across various industries. • Assisted in the design and implementation of user-friendly interfaces using React Native. • Mentored interns and taught them about real-world web and mobile development. • Enhanced communication skills by interacting with clients to collect product requirements.

Education

Kyambogo University
Bachelor's of Information Technology and Computing, Computer Science
2017 – 2020

Skills

DevOps
PostgreSQL
Amazon Web Services (AWS)
Software Infrastructure
Server Side JavaScript

Looking for

Backend Engineer
Frontend Engineer
AI Engineer
Full Stack Engineer

Links

LinkedIn: linkedin.com/in/raymond-kalumba-833168195

Experience

Full Stack Software Engineer

Bondex

Jan 2026 – Sep 2026 · Miami, Florida, United States

• Ship features across Bondex’s hiring ecosystem: web, APIs, and platform services, in TypeScript, React, Node.js, and Ruby. • Own production reliability work end-to-end: diagnose live issues, ship fixes, and harden listing/auth flows used by real users • Build and maintain OIDC-based auth so Bondex and partner products (e.g., Remote3) share secure sign-in and session handling. • Contribute to system design and delivery for multi-product platform work spanning services, data sync, and frontend surfaces

Backend Software Engineer & Dev Ops

Tek Juice

Mar 2025 – Mar 2026 · Leicester LE15FQ

• Case management & workflows, Designed and implemented quote-to-case integration: converting accepted quotes into legal cases with client records, solicitor assignment, and automated workflow/milestone generation, cutting manual case setup time by ~80%. • Conveyancing pricing engine. Architected and built a rate card layer for a conveyancing platform, integrating 28+ provider rate cards with dynamic fee calculation (buy / sell / remortgage), enabling consistent, accurate quotes at scale. • APIs, quality & operations. Delivered RESTful services with standardized responses, strong validation, and automated tests; supported reliable production operations (deployments, environments, observability) so quote and case-management workloads run concurrently with minimal downtime. • Integrations & platform. Contributed to HMRC SDLT (Transaction Engine / XML) flows, document storage and listing (S3, presigned URLs), and staging/production pipelines, improving end-to-end reliability for regulated, document-heavy workflows.

Lead Engineer

SwarmByte

Apr 2022 – Dec 2024 · Kampala, Central Region, Uganda

• As Co-Founder & CTO, defined and executed the end-to-end technology vision for SwarmByte, a scalable gaming social media platform, translating business objectives into a scalable technical roadmap. • Architected and built the core platform using a microservices backend orchestrated via Apollo Federation (GraphQL) and Kafka, improving developer efficiency by 30% and enabling seamless feature deployment. • Built and led the technical team, fostering a culture of high ownership. Actively mentored and unblocked engineers, ensuring rapid iteration from scoping through to production deployment. • Key partner to the CEO (co-founder) and product lead, ensuring all system design and technical priorities directly drove core business metrics and user growth. • Collaborated with stakeholders to align system design with business objectives, driving the development process from scoping to execution.

Full Stack Software Engineer

GitStart Community (YC S19)

Oct 2021 – Jan 2025 · San Francisco, CA

• Transitioned into a Project Manager role, bridging communication between stakeholders and dev teams to align on requirements, timelines, and deliverables. • Resolved UI and backend tickets related to bugs, performance, and scalability. • Reviewed code, and provided constructive feedback to ensure code adhered to coding standards. • Provided guidance to other developers to help them overcome blockers and improve their skills. • Documented code changes, related to client instances, ensuring they are maintainable.

React Developer

SMS ONE (U) LIMITED

Jul 2021 – Jan 2022 · 1-3 Lower Kololo Terrace Rd, Kampala

• Developed a reporting system with effective visualization of data for the Ministry of Education. • Improved maintainability by replacing Redux with Apollo-Client. • Implemented HOC architecture to reuse GraphQL listing and filtering capabilities.

Mobile Application Developer

The Golazo Project

Apr 2021 – May 2022 · Kampala, Central Region

• Worked closely with Product Managers to establish product requirements. • Led a team of four developers and played a critical role in the successful launch of a Gigs startup. • Implemented efficient real-time updates for the live app state using WebSockets.

Full Stack Developer

GlobalIT Business Solutions Limited

Nov 2019 – Nov 2020 · Thobani Centre Building Kampala Road,

• Developed an e-commerce system using the X-Cart platform. • Designed databases and integrated APIs for multiple applications. • Utilized Unified Modeling Language to make implementation decisions. • Implemented designs to meet project goals and deliverables. • Documented software development methodologies in technical manuals for future use•

Junior React Native Developer

Interlet Limited

May 2018 – Jan 2019 · Kampala, Central Region, Uganda

• Contributed to the development of mobile applications for clients across various industries. • Assisted in the design and implementation of user-friendly interfaces using React Native. • Mentored interns and taught them about real-world web and mobile development. • Enhanced communication skills by interacting with clients to collect product requirements.