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Xeon360

Services

What we do, and what you get

Scopes are outcome-first and fixed in writing before we start. If a cheaper path exists, we say so on the call.

Web & product engineering

Web & product engineering

A fast, accessible web product your team can actually maintain — shipped in weeks, not quarters.

Typical timeline · 4–10 weeks

The work

  • Next.js and TypeScript front ends with a real design system, not a template
  • API and data layer design, including auth, billing, and role models
  • Performance and Core Web Vitals work on existing apps

You receive

  • Production deployment with CI/CD
  • Component library and design tokens
  • Handover docs and a backlog of known trade-offs
Agentic LLM integrations

Agentic LLM integrations

LLM features that survive contact with real users: scoped, evaluated, and cost-bounded.

Typical timeline · 3–8 weeks

The work

  • Retrieval over your own data, with grounding and citation of sources
  • Tool-calling agents that act inside your product, with guardrails and audit trails
  • Evaluation harness and cost/latency budgets before rollout

You receive

  • Working agent behind a feature flag
  • Prompt and tool specs under version control
  • Eval suite plus cost-per-request dashboard
Mobile apps — Android, KMP, iOS

Mobile apps — Android, KMP, iOS

One codebase, several brands, no rewrite. Kotlin, Compose, and shared multiplatform logic.

Typical timeline · 8–16 weeks

The work

  • White-label architecture where each brand is configuration, not a fork
  • Ordering, loyalty, payments, and BLE/device integrations
  • Play Store and App Store release engineering

You receive

  • Store-ready builds with signing and release pipelines
  • Modular architecture and test coverage on domain logic
  • Crash and performance monitoring wired up
Audit & rescue

Audit & rescue

An honest read on an app you inherited, with a prioritized plan you can hand to any team.

Typical timeline · 1–2 weeks

The work

  • Architecture, dependency, and release-process review
  • Crash, ANR, and performance triage against real telemetry
  • Security and data-handling review of client and API surface

You receive

  • Written audit with severity-ranked findings
  • 90-day remediation plan with effort estimates
  • Walkthrough call with your team
Embedded retainer

Embedded retainer

A senior engineer inside your team for a fixed monthly rate, without a hiring cycle.

Typical timeline · Monthly, rolling

The work

  • Feature delivery alongside your existing developers
  • Code review, release management, and mentoring
  • Roadmap and technical decision support

You receive

  • Agreed monthly capacity and standing calls
  • Shared board and weekly written progress note
  • No lock-in, one-month notice
Product design & UX

Product design & UX

Screens grounded in real product patterns — researched, prototyped, and ready for engineering handoff.

Typical timeline · 2–6 weeks

The work

  • Competitive and pattern research before any wireframe
  • User flows, wireframes, and high-fidelity screens against your tokens
  • Design system components and specs engineers can build from

You receive

  • Figma library with components and variants
  • Annotated flows for the critical paths
  • Handoff notes and acceptance criteria per screen

Not sure which of these you need?