Logistics are the part you can fully control
You cannot control which questions an interviewer asks, but you can control whether you arrive calm, on time, and with everything you need. Onsite days are long and tiring, and small avoidable problems, a late train, a forgotten ID, a dead phone, drain the energy you should be spending on the interviews themselves. Treating the logistics as their own task, planned the day before, removes a whole category of stress.
This guide assumes a traditional onsite loop where you visit an office for several back-to-back sessions. Plenty of the same thinking applies to a half-day visit or a single in-person round.
Plan the journey before the day
Work out the route and timing the night before, not on the morning. Know the exact address, the nearest station or car park, and how long the journey takes with a sensible buffer. Aim to arrive in the area early, then wait nearby rather than walking in twenty minutes ahead, which can be awkward for the host.
A few things to confirm in advance:
- The full address, including building, floor, and any specific entrance.
- Who to ask for at reception, and a contact number in case you are delayed.
- Whether you need to be added to a visitor list or bring photo ID for building security.
- Parking or transport details if you are driving or the office is awkward to reach.
If anything goes wrong on the day, a late train or a closed road, message your recruiter or contact straight away. Things happen, and a quick, calm heads-up is handled far better than a silent late arrival.
What to bring
Pack a small bag the night before so you are not scrambling. The aim is to be self-sufficient for a long day without carrying half your flat.
A sensible kit:
- Photo ID, in case building security needs it.
- A few printed copies of your CV, even in a paperless office, because someone may not have it to hand.
- A notebook and pen for jotting names, questions, and things you want to follow up on.
- Your phone, fully charged, plus a small power bank if it is a long day.
- A bottle of water and a small snack, since loops can run through normal meal times.
- Any take-home or portfolio material the company specifically asked you to bring.
If the role is technical and you have been told you will use your own laptop, bring it charged with the right adaptors and make sure your environment is set up. If you are unsure whether to bring a laptop, ask the recruiter rather than guess.
Dress to match the place
When in doubt, dress slightly smarter than the team's everyday norm, but do not turn up in a way that feels out of place for the company. Most tech offices are casual, so smart-casual is a safe default for engineering roles. If you genuinely cannot tell, it is a fine question to ask your recruiter, and asking signals care rather than uncertainty. The goal is to feel comfortable and unremarkable, so that nobody is thinking about your clothes either way.
Handle the multi-stage loop
An onsite loop is usually several sessions in a row, often with different interviewers, sometimes including lunch with the team. The challenge is stamina and consistency rather than any single hard question.
Some things that help across a long day:
- Treat each session as a fresh start. A weak round does not have to colour the next one, and interviewers rarely compare notes mid-loop.
- Note each interviewer's name and role as you go, which helps with questions and with any follow-up afterward.
- Use the short gaps between sessions to drink water, reset, and glance at your notes rather than replaying the last hour.
- Keep your energy steady. Interviewers in later sessions deserve the same focus as the first, even when you are tired.
If there is a lunch or an informal walk-around, remember it still counts. It is usually a softer assessment of whether people enjoy talking to you, so be friendly and curious, but assume it is part of the process rather than entirely off the record.
During the sessions
The logistics carry into the room. Keep your notebook visible so you can capture a question that occurs to you rather than interrupting. It is fine to take a moment before answering a hard question, and it is fine to ask for clarification. If you are working on a whiteboard or a shared screen, narrate your thinking so the interviewer can follow you even when your final answer is imperfect.
Look after yourself physically too. Accept the offered water, ask for a short break if you need one between sessions, and do not be afraid to step out to the bathroom. None of this counts against you, and arriving at the final session frazzled because you pushed through helps nobody.
Ending the day well
The last impression sticks. When the loop wraps up, thank the people who hosted you and ask about next steps and rough timing if it has not already been covered. Make a quick note while it is fresh of who you met and anything specific you want to mention in a follow-up message. A short, genuine thank-you note afterward, referencing something real from the day, rounds things off without being excessive.
Before you leave the building, do a quick mental check that you have your ID, phone, notebook, and anything you brought to show. Leaving your laptop in a meeting room is a memorable way to end an otherwise strong day.
A simple day-before checklist
- Route, timing, and buffer confirmed
- Address, contact name, and phone number saved
- ID, printed CVs, notebook, pen packed
- Phone charged, power bank in bag
- Laptop and adaptors ready, if needed
- Water and a snack
- Outfit decided and laid out
Run through it once the night before and you remove almost every avoidable problem, leaving you free to focus on the only part that actually matters: the conversations.
Continue your prep
Get ready for the conversations themselves: