![](data:image/svg+xml;base64,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)![](data:image/svg+xml;base64,PHN2ZyB2aWV3Ym94PSIwIDAgODAwIDgwMCIgZmlsbD0ibm9uZSIgYXJpYS1oaWRkZW49InRydWUiPjwhLS0gaW5uZXIgc3lzdGVtIHdpdGggdGhlIG1haW4gYXN0ZXJvaWQgYmVsdCAoQ2VyZXMsIFBhbGxhcywgSnVubywgVmVzdGEsIEh5Z2llYSksIGF0IHRoZSBKRCAyNDYxMjc5LjMgVENCIGJ1aWxkIGVwb2NoIChldCA9IDg0MTA0NTMwMy45NzMgcyBUREIsICdub3cnIGF0IGdlbmVyYXRpb24gdGltZSk7IHNlZSBtb3RpZnMvaW5uZXItYmVsdC5zdmcgZGVzYyBhbmQKICAgICAgICAgU3RhdGljU2l0ZS5PcmJpdHMgZm9yIHByb3ZlbmFuY2UuIEJvZGllcyByZXZvbHZlIHdpdGggdHJ1ZSBwZXJpb2QKICAgICAgICAgcmF0aW9zLCBNZXJjdXJ5ID0gMTVzL29yYml0LiBHZW5lcmF0ZWQg4oCUIGRvIG5vdAogICAgICAgICBlZGl0IGJ5IGhhbmQuIC0tPjxnIHRyYW5zZm9ybT0idHJhbnNsYXRlKDQwMCA0MDApIiBzdHJva2U9IiNlNmU2ZTkiIHN0cm9rZS13aWR0aD0iMSI+PCEtLSBtZXJjdXJ5OiBUID0gMC4yNCB5IC0tPjxnIHRyYW5zZm9ybT0ibWF0cml4KC0xLjcyIC0xNC45NCAtNDEuMzQgNC44MyAwLjM1IDMuMDcpIj48Y2lyY2xlIHI9IjEiIHN0cm9rZS1vcGFjaXR5PSIwLjUiIHZlY3Rvci1lZmZlY3Q9Im5vbi1zY2FsaW5nLXN0cm9rZSI+PC9jaXJjbGU+PGc+PHBhdGggZD0iTSAwLjk4MDkgMC4xOTQ1IEwgMC45NjAyIDAuMjc5MyBMIDAuOTMyMiAwLjM2MTkgTCAwLjg5NzEgMC40NDE4IEwgMC44NTUyIDAuNTE4MyBMIDAuODA2OCAwLjU5MDggTCAwLjc1MjIgMC42NTg5IEwgMC42OTE5IDAuNzIyIEwgMC42MjY0IDAuNzc5NSBMIDAuNTU2IDAuODMxMiBMIDAuNDgxNSAwLjg3NjUiIHN0cm9rZS1vcGFjaXR5PSIwLjU1IiBzdHJva2UtbGluZWNhcD0icm91bmQiIHZlY3Rvci1lZmZlY3Q9Im5vbi1zY2FsaW5nLXN0cm9rZSIgLz48cGF0aCBkPSJNIDAuNDgxNSAwLjg3NjUgbCAuMDAwMSAwIiBzdHJva2Utd2lkdGg9IjMiIHN0cm9rZS1saW5lY2FwPSJyb3VuZCIgc3Ryb2tlLW9wYWNpdHk9IjAuOSIgdmVjdG9yLWVmZmVjdD0ibm9uLXNjYWxpbmctc3Ryb2tlIiAvPjwvZz48L2c+PCEtLSB2ZW51czogVCA9IDAuNjIgeSAtLT48ZyB0cmFuc2Zvcm09Im1hdHJpeCgtNjYuMTYgLTE0LjMyIC00My43NyAyOS40MyAwLjQ1IDAuMSkiPjxjaXJjbGUgcj0iMSIgc3Ryb2tlLW9wYWNpdHk9IjAuNDUiIHZlY3Rvci1lZmZlY3Q9Im5vbi1zY2FsaW5nLXN0cm9rZSI+PC9jaXJjbGU+PGc+PHBhdGggZD0iTSAtMC41MTgzIDAuODU1MiBMIC0wLjU5MDggMC44MDY4IEwgLTAuNjU4OSAwLjc1MjIgTCAtMC43MjIgMC42OTE5IEwgLTAuNzc5NSAwLjYyNjQgTCAtMC44MzExIDAuNTU2MSBMIC0wLjg3NjQgMC40ODE1IEwgLTAuOTE1MSAwLjQwMzMgTCAtMC45NDY3IDAuMzIyIEwgLTAuOTcxMiAwLjIzODMiIHN0cm9rZS1vcGFjaXR5PSIwLjUiIHN0cm9rZS1saW5lY2FwPSJyb3VuZCIgdmV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0aCBkPSJNIC0wLjE3NjcgLTAuOTg0MyBsIC4wMDAxIDAiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2Utb3BhY2l0eT0iMC41NSIgdmVjdG9yLWVmZmVjdD0ibm9uLXNjYWxpbmctc3Ryb2tlIiAvPjwvZz48L2c+PCEtLSBzdW46IHRoZSBvbmUgYWNjZW50IG5vZGUgLS0+PGNpcmNsZSByPSI0IiBzdHJva2U9Im5vbmUiPjwvY2lyY2xlPjwvZz48L3N2Zz4=)systems engineersgiathjd 2461279.3 tcb ## systems engineer I build backend, security, data, and distributed systems that need to stay correct under pressure. Most of my work is in Elixir/OTP infrastructure, cryptographic protocols, analytics pipelines, authentication, fintech backends, and production LLM features. ### low-level protocol work Complete Elixir implementations of Noise Protocol, Nostr, Gemini/SpaceBoy, and Reticulum, plus native cryptography bindings when the BEAM needs help. ### backend and data systems Elixir/Phoenix services, SQL-heavy analytics, background workers, event-driven systems, and payment flows where correctness matters more than ceremony. ### security and reliability Authentication migrations, SSO, SAML, MFA, secure credential flows, observability, incident tooling, and systems operators can understand at 3 a.m. ### expertise - **Elixir & OTP** - concurrent systems that fail predictably and recover cleanly - **EventSourcing / CQRS** - audit trails and domain workflows - **Cryptography** - protocols, key handling, E2EE - **Distributed Systems** - backends with clear failure modes and useful telemetry - **LLM Integration** - product features, agent workflows, and eval-aware integrations - **Authentication** - OAuth, MFA, SSO, credential lifecycle ## contact - Web - [sgiath.dev](https://sgiath.dev) - Email - ### social media - Nostr - npub1qqqqq2z\...3hlwh5 - Twitter - [\@SgiathDev](https://twitter.com/SgiathDev) - XMPP - [sgiath@sgiath.dev](xmpp:sgiath@sgiath.dev) ### other links - GitHub - [sgiath](https://github.com/sgiath/) - SourceHut - [\~sgiath](https://git.sr.ht/~sgiath/) - PGP - 0x70F9C7DE34CB3BC8 [(download key)](/sgiath.asc)