After a Series A, engineering hiring becomes a continuous operation rather than an occasional event. The founders who do it well plan the shape of the team, allocate sourcing effort deliberately, run a short and consistent interview loop, and close quickly. This playbook covers each of those.
Correction: An earlier version of this article included headcount benchmarks, compensation tables, channel yield percentages, and retention statistics presented as Refery data. There is no verified dataset behind those figures and they have been removed. This version is a process guide with labeled examples.
Plan the shape of the team
Before opening a single role, write down what the engineering team should look like at the next milestone and work backwards. Two rules of thumb hold across most Series A companies:
- Depth before layers. Add senior individual contributors before adding managers. A team that adds several managers early has too much structure and too little execution.
- Specialists after generalists. The first hires after the round should be people who can work across the stack. Infrastructure, ML, and frontend specialists come once the core is stable.
Write the plan as a table: quarter, target headcount, roles to open, and what has to be true for each to be justified. Revisit it quarterly. See prioritize startup hiring requisitions.
Set compensation from your own comparables
Set ranges before sourcing, from sources you can name: offers you have made, public postings for similar roles in your market, investor benchmarks with their definitions. Label the source of each range. For a method, see set startup hiring budget from comparable roles; for public salary examples with their sources, see founding engineer compensation and AI engineer salary examples.
Allocate sourcing effort deliberately
Senior engineers are mostly not looking. The channels that reach them are the ones that arrive through someone they trust.
| Channel | What it produces | When to use it |
|---|---|---|
| Investor introductions | High-context candidates, limited supply | First pass on every senior role |
| Founder and team network | Highest trust when it exists | Continuous; ask the team monthly |
| Referral network | Introductions from operators who know the candidate, vetted before you see them | In parallel from the start, for reach beyond your own network |
| In-house outbound | Candidates not reachable through referrals | Specialist roles; needs a recruiter or dedicated founder time |
| Inbound and job boards | Active job seekers | Supplement; do not plan a senior search around it |
A reasonable default is to put most effort into warm channels, a minority into targeted outbound, and treat inbound as a bonus. Adjust when your own tracking shows where hires actually came from. See evaluate recruiting source channels.
Refery routes roles to founders, operators, investors, and specialist recruiters and vets every referral before it reaches you, at a fee agreed before the search starts.
Design a short, consistent loop
Four to five stages, scheduled within about two weeks, each with a named owner and a rubric:
- Screen (founder or recruiter): fit, motivation, compensation range alignment.
- Hiring manager conversation: scope, growth, technical depth.
- Technical assessment: a real problem from your codebase, or system design for senior candidates. See design a bounded hiring work sample.
- Team panel in a single day: technical depth, range, collaboration, ownership, each owned by a different interviewer.
- Founder close: vision, equity walkthrough, mutual decision.
Long loops lose candidates to other offers. If a stage does not produce evidence a decision needs, remove it. See map interview evidence and remove extra stages.
Make the team panel produce distinct evidence
The panel fails when interviewers ask overlapping questions or score without a rubric. Assign one signal area to each conversation:
- Technical depth in their primary stack.
- Range outside it: debugging, on-call, adjacent layers.
- Collaboration: pairing, asynchronous communication, disagreement.
- Ownership: driving scope, recovering from failure.
Score each on an anchored rubric and record the evidence, not just the number. See build an anchored interview scorecard and assess high agency in startup interviews. When the debrief disagrees, resolve it on evidence: resolve interview debrief disagreement.
Close with structure and speed
An offer should arrive with the decisions made: base, equity as share count and percentage, vesting and acceleration terms, any signing bonus, and a short written note on the first 90 days. The founder calls within a day of the verbal offer. See startup offer decision brief and explain startup cash and equity offer.
If the candidate has competing offers, handle it without pressure: handle competing offers without pressure.
The five mistakes that cost the most
- Hiring too senior too fast. Several staff-level engineers before a senior IC bench creates an organization with more opinions than output.
- Relying on inbound. A careers page catches people already looking; the best senior candidates are not.
- Loops that drag. Every extra week is another chance for a competing offer.
- Pre-deciding the candidate. Decide the range in advance; do not decide the person before the loop ends.
- Treating hiring as a project. It is a weekly operating rhythm with a standing review. See weekly recruiting update template.
Budget with labeled assumptions
The cost of a senior hire is base plus equity plus recruiting fee plus benefits and onboarding, plus the time your team spends. Build the budget line by line with your own inputs; the method and a worked example are in how much does it cost to hire a senior engineer. Track what actually happened with the hiring metrics template so the next plan is built on your own data.
Share your role with Refery to agree the scope and fee for your search.