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Hi, I’m Zawar Ali. I design and build secure software systems with a focus on cryptography, PKI, and distributed ledgers. I love turning tough security and performance challenges into reliable, scalable solutions that enable trusted digital services. I enjoy mentoring and collaborating across teams, with a track record delivering resilient systems under heavy load and guiding cross-team integrations in crypto SDKs and identity solutions.…Hi, I’m Zawar Ali. I design and build secure software systems with a focus on cryptography, PKI, and distributed ledgers. I love turning tough security and performance challenges into reliable, scalable solutions that enable trusted digital services. I enjoy mentoring and collaborating across teams, with a track record delivering resilient systems under heavy load and guiding cross-team integrations in crypto SDKs and identity solutions.

Zawar Ali

Web Developer, Back-End Developer, Full Stack Developer, +2

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Hi, I’m Zawar Ali. I design and build secure software systems with a focus on cryptography, PKI, and distributed ledgers. I love turning tough security and performance challenges into reliable, scalable solutions that enable trusted digital services. I enjoy mentoring and collaborating across teams, with a track record delivering resilient systems under heavy load and guiding cross-team integrations in crypto SDKs and identity solutions.…Hi, I’m Zawar Ali. I design and build secure software systems with a focus on cryptography, PKI, and distributed ledgers. I love turning tough security and performance challenges into reliable, scalable solutions that enable trusted digital services. I enjoy mentoring and collaborating across teams, with a track record delivering resilient systems under heavy load and guiding cross-team integrations in crypto SDKs and identity solutions.

Available to hire

Hi, I’m Zawar Ali. I design and build secure software systems with a focus on cryptography, PKI, and distributed ledgers. I love turning tough security and performance challenges into reliable, scalable solutions that enable trusted digital services.

I enjoy mentoring and collaborating across teams, with a track record delivering resilient systems under heavy load and guiding cross-team integrations in crypto SDKs and identity solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

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Intermediate

Work Experience

Backend Software Engineer II at R3 London

July 1, 2025 - Present

Contributed to a Central Bank Digital Currency solution, designing and implementing a certificate store service API (Ktor) to integrate with PKI for certificate storage, retrieval and revocation. Enhanced crypto-SDK with JWT-SVID verification using Nimbus JOSE + JWT and OPA. Mentored a summer intern, and coordinated across six teams to centralise microservices’ root CA management via Kubernetes ConfigMaps, improving security and easing key rotation. Led PKI–Keycloak integration for OIDC token signing and verification, enabling SDK-backed end-user authentication. Delivered authenticated and authorised inter-service communication across 12 applications, handling 5,000+ requests during deployment.

Backend Software Engineer I at R3 London

September 1, 2024 - July 1, 2025

Developed Kotlin crypto-SDK for high-performance signing and verification, including key rotation and client-side hashing, resulting in 200% faster transactions. Designed and deployed PKI (Terraform, AWS, Vault) for secure key propagation and SPIFFE SVID-based authentication. Benchmarked SDK (K6, Ktor) achieving 500ms P90 signing and 1.5ms verification under heavy load (1000+ concurrent users). Improved resilience with resilience4j retries, maintaining 95% uptime in Kubernetes Chaos Mesh tests. Maintained SDK documentation and supported cross-team integration.

Software Engineer Intern at R3 London

June 1, 2023 - September 1, 2023

Worked on Corda, a distributed ledger platform for financial services: facilitated retrieval of transaction flow logs, enhanced event logging, and enabled custom trace sampling rates via the Corda REST API. Deployed a Docker/Kubernetes-based tracing tool to streamline performance tracking and analysis for the performance team.