Open for SoW & Fractional engagements · PAYG · Sydney / Remote
Biswa
Dahal
Technical leadership (hands-on) covering regulated, high-stakes environments.
Cloud architecture, GenAI, full-stack & contact centres.
$5M+ portfolio delivered on time and in budget
Fractional Tech Lead
Strategic technical leadership, part-time. Fills the gap between a junior lead and a full-time CTO hire. Outcome-focused, not seat-filling.
Statement of Work
Fixed scope, fixed price, clear deliverables. You buy the outcome, not the hours. Risk sits with me to scope and deliver correctly.
Contract / Staff Aug
Senior engineer embedded in your team. AWS, GenAI, contact centre. Time-and-materials, minimum 3 months. Available on request.
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Production GenAI
AI · Voice-AI
LLM-based real-time contact centre monitoring, listening to IVR via live phone call and validating expectations, alerting when down.
$180K+ saved per annum · replaced COTS product
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Realtime Voice Bot
AI · NLP
Separate realtime IVR voice-bot triaged and re-routed non-health queries, reducing load on clinical staff.
33% non-clinical call deflection
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Full-stack webapps & modernisations
Backend · Frontend & DevOps
Multiple secure full-stack apps, ranging from "clinical-chat", to visual drag-drop conversation designer. Migration to AWS serverless with automated deployment pipelines, self-service enabled VDI based content-authoring pipeline.
$60K+ saved per annum
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Developer Platform and DevOps enhancements
Multi-team · ISM-Controls
Reusable CDK modules, Cloudformation templates. Security guardrails + FinOps tagging to board level. ISM & E8 controls across solutions. End-to-end automations.
Faster delivery velocity · consistent security posture
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National Crisis Response
Healthdirect / Commonwealth
Launched the National COVID-19 Contact Centre live in only 14 days from standing start. 10+ bespoke contact centres, each from brief to live in weeks. Integrated with CRMs, external systems.
Commonwealth recognition & repeat contracts
- 2017 – 2026
Healthdirect Australia · Sydney, Australia
Government-funded national health platform: nurse triage and GP telehealth at population scale more recently, and web-based digital services prior to that.
- 2017
Insight Timer · Sydney, Australia
Meditation app at global scale: high throughput on commodity hardware.
- 2012 – 2017
Autodesk · Toronto, Canada
Global SaaS platform: REST APIs and developer SDK supporting Fusion 360, used by global user-base.
- 2008 – 2011
University of Iowa · Iowa City, USA
Full-stack academic platform: course catalogue and student search for a Big Ten university.
- 2006 – 2008
ACT Inc · Iowa City, USA
Content backend for ACT standardised testing: globally administered, compliance-sensitive.
Cloud / Infrastructure
- AWS Serverless
- Lambda
- ECS Fargate
- EC2
- SQS
- Appstream
- Kinesis
- VPCs
- IAM
- AWS CDK
- CloudFormation
- GCP
- Pulumi & Cloud Automations
- FinOps
AI / GenAI
- OpenAI API
- Whisper
- Google STT
- Custom STT & entity extraction
- AWS Lex
- LLMs
- NLU
- TTS
- Agentic workflows
Security / Gov
- ISM Controls
- Essential Eight
- DevSecOps
- AppSec
- Design Reviews
- Change Management
- Incident Management
Backend & Frontend
- TypeScript
- Python
- Node.js
- Java 8+
- Kotlin
- REST
- GraphQL
- OAuth/OIDC
- SCIM
- SAML/SSO
- React
- MobX
- Jest
- Playwright
- Atlassian Forge
Data
- DynamoDB
- Postgres
- Oracle
- MongoDB
- Redis
- MS SQL
- ElasticSearch
Contact Centre
- Amazon Connect
- Twilio Flex
- IVR design
- MS Dynamics 365
- FHIR
- Integrations
Delivery
- $5M+ portfolio
- ADRs
- Team shaping
- Hiring rubrics
Working Style
Senior engineering roles often get split across two or three hires, someone for the models, one for infrastructure, one for delivery. I've kept all three current for 15+ years, and bring expertise which adds up to be greater than the sum of their parts. I read codebases on day one, have a view on architecture by end of week one, and earn the team's trust by end of the first sprint. I provide reusable patterns and best practices grounded by strong security and operational maturity.
Where small things get built.
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When Voice AI Meets the Suburbs
VoiceAI is hard - a bot can transcribe "Geelong" easily, or could mis-spell it to "Jlong" (based on how it's pronounced by locals). High accuracy in specific domains (medicine, suburbs, aviation) is the hard part. This is a field note on the gap in between.
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AI Generated Invoice Validator
Upload a PDF invoice; a vision LLM extracts its structure, a second synthesises a bespoke validator on the fly, and that code executes in a sandboxed runtime with no network access. Cached after two stable runs. Streamed live.
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A Lean Canvas Macro Built on Atlassian Forge
A Confluence macro: React and MobX frontend, serverless resolvers, Confluence Storage API for persistence, drag-and-drop reordering, PDF export, and schema versioning.
Open for SoW and
Fractional enquiries.
Sydney CBD, hybrid, or fully remote across Australia. PAYG Contract/Staff Aug considered.