Hire Developers Who Already Know Your Stack
On call, by name.
Bugs fixed, features shipped, workflows kept running, by experts who know your stack, your goals and your customers by name.
Senior engineers in Ho Chi Minh City, from $50 per hour. No junior bench, no notice trap.
THE SERVICE
What hiring developers through us means
You get senior engineers from our Ho Chi Minh City team working on your platform, without recruiting, contracts of employment or an entity in Vietnam. Three ways to buy it: a development support retainer with a named Project Lead and Tech Lead, a Bank of Hours you draw down as you need it. Every ticket gets a second pair of eyes before it deploys and a written record afterwards. The people who scope your work are the people who do it, which is the part most offshore arrangements get wrong.
Capacity when you need it, counsel when you don’t
Development support
Bugs, features and optimisation across your platform, prioritised with you, shipped with a second pair of eyes.
Workflow and AI-agent support
The automations and agents we (or others) built, kept running, tuned and improved.
Bank of Hours
Pre-paid expert capacity without a fixed scope, design, development, SEO or AI workflow time, used as you need it.
Honest counsel
Partners challenge the brief. If you don't need something, we'll say so, it's cheaper for you and better for us long-term.
Three ways to buy it
All three come with the same people. There is no cheaper tier staffed by someone else.
Development support retainer
Monthly capacity with a named Project Lead and Tech Lead, a shared backlog ordered by impact, and weekly written updates.
Bank of Hours
Pre-paid hours you draw down as you need them, across design, development, SEO or AI workflow time.
Dedicated engineers
Engineers working inside your process and repo, directed by your team.
THE OFFSHORE OBJECTION
What you are not getting
That is also why we are not the cheapest quote you will get. Agency-rate engineering in Vietnam sits well above the freelance rate, and the gap is code review, continuity and someone accountable when it breaks.
A bench.
The people who scope your work are the people who do it. Nobody gets handed to a junior after the contract is signed, because we do not keep a junior bench to hand them to.
A ticket queue.
A named Project Lead and a named Tech Lead, whose names you learn in the first week.
Bodies by the seat.
Several firms in this city will sell you headcount, and if headcount is genuinely what you need they will do it more cheaply than we will. We sell a small senior team that reviews its own work.
A lock-in.
Your repository, your environments, your documentation, throughout. Ending the arrangement is an email, not a negotiation.
OUR PROCESS
Ordered by impact, shipped weekly. Onboard, prioritise, ship, compound.
Onboard
We learn the stack, code, infrastructure, history, bodies buried.
Prioritise
A shared backlog ordered by impact, not by who shouted last.
Ship
Weekly cadence, written updates, reviewed code.
Compound
Support reveals opportunities; the best retainers grow into growth engines.
Who this works for
You have a platform and no engineer, or one engineer and no cover.
The most common reason people call. Holiday, resignation or a single point of failure everyone has been quietly worried about.
Your roadmap is longer than your team.
Capacity rather than a project, without a hiring round that takes five months.
You are an agency that needs an engineering half.
Gremlin Works and Celerity are both exactly this: we build, you keep the client relationship, and your client need never hear our name.
Someone built you something and left.
We audit it honestly first, so you know what you are sitting on before anyone commits to supporting it.
Your automations are running unattended.
The agents and workflows nobody owns until the day they stop.
Rates and commitment
We would rather you left because you no longer need us than because you could not get out.
On where that sits: hiring a freelance developer in Vietnam is cheaper, and if the work is well defined and low risk that may be the right call. Agency engineering here bills at roughly double the freelance rate, and what the difference buys is a second engineer reviewing every change, continuity when someone is ill, and a company rather than an individual on the hook. For a system that earns money while you sleep, that is usually the cheaper option over a year.
Working across time zones
We are in Ho Chi Minh City. For clients in the UK and Europe that means work happens while your office is closed and lands before you open, which is why the weekly written update matters more than a standup. For the Americas the overlap is at the edges of the day, so we agree the escalation route up front rather than hoping someone is online.
Either way you get written updates rather than meetings at unreasonable hours, and a backlog you can read at any time without asking anyone.
Questions, answered straight
No fluff, as promised.
What's a Bank of Hours?
Pre-paid expert hours, design, development, SEO or AI workflow time, used flexibly without a fixed scope. Ideal when you need capacity, not a project.
Can you support code another agency built?
Yes. We audit it honestly first, you'll know exactly what you're sitting on, then we support it to the same standard as our own builds.
How do retainer hours work?
Scoped monthly, tracked transparently, reported in writing. Unused capacity conversations happen before renewal, not after.
Who actually does the work?
The same experts who win the work, no hand-off to a junior bench. You'll know your team by name.
What technologies do you work in?
Next.js and React on the front, TypeScript throughout, NestJS behind it, WordPress where it earns its place, deployed on AWS. We also support stacks we did not choose. If yours is genuinely outside what we do well, we will say so rather than learn it at your expense.
Can you work white-label for our agency?
Yes, and a good share of this work is exactly that. Gremlin Works and Celerity both hired us as their engineering half. Your client keeps talking to you, we stay out of the room, and nothing carries our name unless you want it to.
What is the minimum commitment, and how do we leave?
Your repository, environments and documentation are yours throughout, so leaving is an email rather than a negotiation. A retainer people stay in because leaving is painful is not worth having.
How is this different from hiring a freelancer?
Mostly the structure around the people. What an agency adds is a second engineer reviewing every change, someone covering when one person is ill, and a company rather than an individual carrying the risk. For a low-risk, well-defined job, a freelancer may genuinely be the better answer, and we will say so.
Stop chasing. Start shipping.
Tell us what needs fixing, building or babysitting. You'll know your team by name within a week.