Outsourced product engineering

Straight to main.

A London software studio for teams that need the work finished, not started. A named team, a fixed scope and a date.

Start a project
See how we ship
Railway tracks at night converging into a single main line under one green signal.

$ git merge --no-ff roadmap && git push origin main

  • 01

    Product

    Discovery, design and the build that follows.

  • 02

    Platform

    APIs, data and the plumbing underneath.

  • 03

    Delivery

    A named team, a fixed scope and a date.

Stack

Tools we ship with: 16

01 / Manifesto

A lone railway signal glowing green in dense night fog.
Fig. 02 /Signal clear

Plenty of studios are good at starting. We are built for finishing. Every engagement has a named team, a fixed scope and a date on the calendar. Your code opens, crosses the mainline and closes. Then we hand it over, documented, and you own every line.

The mainline&co brief, in one paragraph.

mainline&co
Start a project
See how we ship

02 / What we ship

Four ways to get it to main.

Not sure which one fits?

Tell us what needs to ship. We will tell you how we would get it to main, in one call.

Start a project
Book a 20-minute call

03 / Process

Every project is a branch. Every branch merges.

Five steps, the same on every engagement. You always know which one we are on.

  1. 01Week 0 to 1

    Scope

    git checkout -b scope

    A paid discovery sprint. We read your code, talk to your users and write the scope down: what ships, what does not, and the date.

  2. 02Week 1

    Plan

    git commit -m "plan: milestones, owners, date"

    Milestones you can hold us to. One named lead, one channel and one board you can see at any hour.

  3. 03Every fortnight

    Build

    git merge feature/* --no-ff

    Two-week cycles. A working build at the end of each one, deployed where you can click it. No status theatre.

  4. 04On the date

    Ship

    git push origin main

    We release to production with you in the room. Monitoring, rollbacks and a runbook are part of done.

  5. 05The day after

    Handover

    git tag v1.0.0

    Documentation, recorded walkthroughs and a clean repository. You own every line, and we stay on call for thirty days.

Your turn

Have a roadmap

that needs to ship?

Send the brief today. A named person replies within one working day, with a plan and a date.

hello@mainlineand.co
Start a project
Book a 20-minute call

04 / The contract, in numbers

  • 14 days per build cycle, with a working demo at the end of each one.
  • 1 lead named person accountable from scope to handover.
  • 100% yours of the code, the IP and the credentials, from the first commit.
  • 30 days of on-call support after launch, included in every build.

Every number above goes in the contract.

Get a fixed quote

05 / Engagements

Three ways to work with us.

  • An empty railway depot at night with parallel tracks under a steel roof.
    01 / 03Fixed scope, fixed price

    Build

    For a product or platform with a clear outcome. We scope it, price it and ship it on a date you can plan around.

    Typical length
    8 to 16 weeks
    Team
    3 to 6 people
    Starts with
    Scope sprint
  • A quiet London warehouse studio at night with three monitors on a long oak table.
    02 / 03Monthly, per squad

    Extend

    A senior squad inside your team. Your repository, your rituals, our velocity. Scale it up or down each month.

    Minimum
    3 months
    Team
    2 to 5 people
    Starts with
    Intro week
  • View from inside a railway tunnel toward the bright exit, rails running straight out.
    03 / 03Audit first, then fixed scope

    Rescue

    For the project that stalled. We audit it in two weeks, tell you the truth about it, then get it to main.

    Audit
    2 weeks
    Then
    Fixed scope
    Starts with
    Repo access

Not sure which one?

Start with a scope sprint. It pays for itself in decisions.

Book a scope sprint

06 / Studio

Software, London.

Current time in London

London, GMT51.5072° N, 0.1276° W
Brutalist concrete towers of the Barbican in London at dusk.
Fig. 03 /Barbican, EC2

We work from a studio in London and keep UK hours, with a daily overlap for Europe and the US East Coast. Engineers you can meet, in a timezone you can call.

Come and see the studio.

Book a visit
Fig. 04 /The studio
A quiet London warehouse studio at night with three monitors on a long oak table.
A system architecture diagram sketched in pencil with one path highlighted in green.
Fig. 05 /Scope, on paper
Base
London, United Kingdom
Hours
09:00 to 18:00 UK time
Overlap
Europe all day, New York from 14:00
Kick-off
In person, at your office or ours

07 / Terminal

Or ask the terminal.

Type help. Everything on this page is also available as a command.

guest@mainline: ~

08 / FAQ

Straight answers.

  • Build and Rescue are fixed price, agreed after the scope sprint. Extend is a monthly rate per squad. There are no day-rate surprises and no hidden hours.

Still got a question?

Ask a person, not a chatbot. We reply within one working day.

Email a personStart a project

09 / Contact

Let’s close it.

Tell us what needs to ship and by when. We reply within one working day, with a person, not a sequence.

Send a brief

* Required

Budget
Timeline