The systems underneath, built to hold.

Backend infrastructure, payment systems, media platforms, decentralised protocols. Built in Ireland, shipped to production, owned by you.

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RUSTTYPESCRIPTC#C++LIGHTNINGNOSTRKVMFFMPEGEMBEDDED170+ REPOS

STRATUM 01WHAT WE BUILD

Backend & infrastructure

High-performance services, APIs, and infrastructure tooling. From VPS provisioning engines to media pipelines — systems that run for years without babysitting.

Payments & fintech

Bitcoin Lightning integration, fiat on-ramps, and payment processing infrastructure. Real payment systems — not white-label checkout pages.

Platforms & protocol engineering

Full-stack platforms, live streaming infrastructure, embedded tooling, and decentralised protocol implementations. Firmware to frontend, spec to production.

STRATUM 02SHIPPED, RUNNING, PUBLIC

INFRASTRUCTURE · PAYMENTSN°1

LNVPS — Bitcoin Lightning VPS

Complete VPS platform built from scratch in Rust. Instant provisioning, Lightning and fiat payments, on-demand VM upgrades. In production at lnvps.net.

Rust · Lightning · KVM · NWC★ 8 LNVPS/api

NOSTR · WEB CLIENTN°2

Snort — Nostr web UI

Feature-packed Nostr client in TypeScript/React. The most widely used web interface for the protocol, with an active contributor community.

TypeScript · React · Nostr★ 341 v0l/snort

STREAMING · NOSTRN°3

zap.stream — Live streaming

End-to-end Nostr live streaming: Rust backend core, React frontend, native app. Lightning zaps, NIP-96 media, real-time FFmpeg ingestion.

Rust · TypeScript · FFmpeg★ 61 v0l/zap.stream

EMBEDDED · FIRMWAREN°4

radio_tool — DMR firmware tooling

Firmware tool for DMR radios (Baofeng, TYT): codeplug reading and writing, firmware flashing. Low-level C++ against undocumented hardware — the embedded end of the stack.

C++ · Embedded · USB★ 104 v0l/radio_tool

Open-source core

ALL 170+ REPOS →

route96Self-hostable Blossom/NIP-96 media server — storage, image processing, content addressing.Rust · ★ 24 adsb-overlayReal-time ADS-B aircraft tracking overlay for cameras — augmented reality for plane spotting.JavaScript · ★ 35 dtanDecentralised torrent index on Nostr — censorship-resistant file discovery.TypeScript · ★ 25 zap-stream-coreRust streaming engine — HLS segmenting, transcoding, Nostr publishing.Rust · ★ 20 dtan-serverP2P relay backend for DTAN — torrent discovery over Nostr with BitTorrent integration.Rust · ★ 18 payments-rsMinimal payment handler library. Lightning, Revolut, and Stripe in Rust.Rust · ★ 2

STRATUM 03WHO'S BEHIND IT

"If you need a team that ships infrastructure, not slide decks — get in touch."

Kieran Harkin

FOUNDER & DIRECTOR

Built production systems at BoyleSports and Strike. Funded by OpenSats (2023–2025) to work full-time on open-source Nostr projects including Snort, zap.stream, and Route96. Builds and operates LNVPS and Nostrlabs.

GITHUB →LNVPS →NOSTRLABS →

Direct, no hand-offsSenior engineers lead every project. No bait-and-switch, no junior hand-offs mid-sprint, no account managers in between.

Proven infrastructureThe same backend patterns and payment integrations that run LNVPS in production — battle-tested, not theoretical.

Open-source coreOver 170 public repositories in Rust, TypeScript, C#, C++, and embedded. Audit the quality before you commission.

Full lifecycleArchitecture, build, test, deploy, monitor, iterate. You own the code at every stage. No lock-in, no recurring licence.

STRATUM 04CONTACT

Start a conversation

Describe the project. If it's a fit, you'll hear back from the team. We take on a limited number of engagements at a time to stay hands-on.

kieran@apexstrata.ieApex Strata Limited · Suite 10628, 26/27 Upper Pembroke Street, Dublin 2, D02 X361Registered in Ireland · Company no. 702423Also: lnvps.net · nostrlabs.io