Phasekit, live in twelve weeks.On the date we set in week one.

Phasekit came to us with a deck, a waitlist and a launch date. We scoped, designed and built the web app, then shipped it to 400 waiting teams.

Client
Phasekit, Berlin
Service
Web app, design and build
Timeline
12 weeks, Jan to Mar 2026
Team
Mara Lindqvist, Product leadInes Okafor, Design directorTomás Reyes, Engineering leadFive people, led by Mara
Phasekit founders and the Slipway team around one table, reviewing the board on a laptop
01

The brief

Phasekit had raised a pre-seed round on a deck and a waitlist of 400 teams. What they did not have was a product, a design team or an engineer.

Their investors wanted it live before the end of the first quarter. Ross Martin, their product manager, needed one team that could take it from a sketch to a production app without him managing three vendors.

02

The approach

Two weeks of conception: a scope workshop, user flows and a clickable prototype tested with six teams from the waitlist. Ross signed it off before we wrote a line of code.

Then six weeks of build, with a working staging link every Friday. Ross clicked through each one with Mara and decided what moved up and what waited.

Close-up of a Slipway designer annotating Phasekit card designs on paper
  • Cut 31 features to 14Everything a team needs on day one. Reports, time tracking and the API moved to after launch.
  • One board, real timeCards move for everyone at once. No refresh, no conflicts, tested with 60 people on one board.
  • Built on their stackVue and Node, so Phasekit's first engineer could take over the code without a rewrite.
03

The result

Phasekit went live on Thursday 26 March, on the date we set in the first workshop. The waitlist came in three waves and nothing needed rolling back.

We handed over the code, the docs and the design files, and stayed on for four weeks while their first engineer took the keys.

12weeksFrom kickoff to phasekit.io going live.
12of 12Friday demos shipped on staging, none missed.
1,100teamsSigned up in the first month after launch.
The live Phasekit board on a laptop in a team's office

Twelve weeks, replayed.Every Friday, a build you could click.

The launch track as it happened: what shipped, the day it reached staging and who signed it off.

PhasekitWeb app, 5 Jan to 26 Mar 2026
phasekit.io
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  • 01Conceptionweeks 1 to 2
  • 02Implementationweeks 3 to 8
  • 03Refinementweeks 9 to 11
  • 04Deploymentweek 12
  1. Week 1, Conception
    Scope workshopTwo days with Ross and the founders. The scope went from 31 features to 14.
    Scope signed off
  2. Week 2, Conception
    Clickable prototype approvedBoard, card detail and team invites, tested with six teams from the waitlist.
    Prototype signed off
  3. Week 3, Implementation
    First build on stagingstaging.phasekit.io: sign-in, workspaces and an empty board you could click.
    Demo 1 of 12
  4. Week 6, Implementation
    Real-time board on stagingCards move for everyone at once. Ross ran his own team on it from that Monday.
    Demo 6 of 12
  5. Week 8, Implementation
    Billing and invites doneStripe billing, seats and roles. Every core flow worked end to end.
    Build signed off
  6. Week 9, Refinement
    Private beta with 40 teamsWe fixed what the beta found, most of it on mobile Safari, within the week.
    Demo 9 of 12
  7. Week 11, Refinement
    Release candidateEvery flow tested on real devices. Load tested with 60 people on one board.
    Release signed off
  8. Week 12, Deployment
    phasekit.io is liveThe waitlist came in three waves. Code, docs and design files handed over.
    Live

Outcome

Portrait of Ross Martin, Product Manager at Phasekit
“We saw a working build every Friday. Launch day felt like a formality, not a gamble.”
Ross MartinProduct Manager at Phasekit
Mara Lindqvist
“Ross cut features in week one that most clients fight for in week ten. That is why we hit the date.”
Mara Lindqvist, Product lead at Slipway

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