Perth · Remote
Julian Bell
Kotlin · Java · AWS
Kotlin-focused software engineer, systems architect, and security/encryption consultant.
I help teams modernise services, design clean architectures, and deliver secure, encryption-heavy back-ends on AWS.
What I do
- Architectural design & system planning
- Kotlin / Java back-end development (Javalin, Spring)
- AWS serverless: Lambda, API Gateway, S3, RDS (PostgreSQL), IaC with SAM
- Data migration & performance: jOOQ, HikariCP, JPA
- Security & crypto integrations (OpenPGP/PGPainless, PKCS#11, KMIP, YubiHSM)
- Frontend pragmatism: TypeScript/Vue for admin tools when needed
Start a conversation
Recent work
- AWS Lambda + API Gateway services deployed with SAM
- Javalin-based microservices
- OpenPGP key management flows (PGPainless + server-side hardening)
- Google Client-Side Encryption (CSE) integrations
Available for ongoing or short focused engagements.
Consulting services
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Security & encryption consulting — OpenPGP/PGPainless integrations, PKCS#11 and HSM workflows, KMIP-based key management, Google Client-Side Encryption (CSE), and secure key storage design.
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AWS consulting — AWS Lambda, API Gateway, S3, RDS/PostgreSQL, SAM-based deployments, and serverless architecture reviews.
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SQL & data migration consulting — PostgreSQL schema design, migration planning, performance tuning, and jOOQ/JPA-backed data access layers.
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Architecture & code review / fractional CTO — backend architecture reviews, Kotlin/JVM codebase audits, and part-time technical leadership for small teams who need senior guidance without a full-time CTO.
Selected engagements
- FlowCrypt — Kotlin security engineering on OpenPGP key-management and Google Client-Side Encryption (CSE); AWS Lambda/RDS migration and SAM deployments.
- Colleagues Matrixx — Spring Boot API, mutual TLS authentication; SQS integration; MVP delivered on time through lockdowns.
- BP — REST APIs (Spring Boot), Azure AD/OIDC; delivered agile proof-of-concepts demonstrating how small, focused teams can outpace large corporate processes.
Contact
Native English speaker. Perth, Western Australia.