After the phases
Skills a Staff engineer needs
Technical depth is necessary for Staff, but it is not enough. A Staff engineer moves from solving hard problems alone to making a whole organisation more effective. You still ship, mostly by directing agents. Your most valuable work becomes standards, architecture, mentoring, incident leadership, and systems that make other engineers and their agents faster.
Decide under uncertainty
Make reversible decisions fast. Take your time over decisions you cannot reverse. Write down assumptions, constraints, and alternatives. When requirements are unclear, prefer designs that keep options open. After you build something, review the decision with real data instead of defending it. Agents make it cheap to prototype two options before you choose, so use them for that.
Write RFCs and decision records
Write a short RFC for a change that affects several teams. Write a decision record for an important implementation choice. A good document states the problem, constraints, options, recommendation, trade-offs, rollout, and how you will measure success. An agent can write the draft. The decision and the reasoning must be yours.
Lead without authority
Pair with teams, listen to their problems, and earn adoption by being useful. When you propose a standard, make moving to it easier than staying on the old way. Collect cases where the standard does not fit, and document a way out. Rolling out coding agents across a team is a clear current example of this skill, and you can practise it now.
Lead incidents
During an incident, reduce uncertainty. Establish the impact, assign investigation threads, keep a timeline, decide on mitigations, and communicate clearly. Afterwards, fix the system instead of blaming people, and turn the failure into a test, an alert, a runbook, or an architecture change.
Teach others
Teach through design reviews, pairing, and reusable examples. Run workshops on agent security, tracing, eval design, and working with coding agents. Review other teams' agent architectures. Raise the level of the whole organisation, instead of becoming the only person who can run the platform.
Practise with these documents
Write each of these at least once:
- An RFC for a standard way to trace agents.
- An RFC for rolling out coding agents to an engineering organisation, covering permissions, telemetry, cost control, and training.
- An RFC for the security model of internal MCP servers.
- A decision record on a workflow framework versus a custom state machine.
- A decision record on how to abstract model providers.
- An SLO document for the PR review agent.
- A threat model for agent tool calls and coding-agent permissions.
- A postmortem for a runaway token-spend incident.
- A runbook for a model provider outage.
- A guide on how to add an eval before you change a prompt.