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About OneSyntax

Trust shouldn’t be the riskiest part of building software.

Founders should never have to choose between moving fast and knowing what is happening. We built OneSyntax around senior access, visible progress and ownership from day one.

Meet the team See how we work

OneSyntax in numbers

Longest client relationship began
2018
Typical client relationship
2–8 yr
Products in active development
8–10
Revenue our clients added in Q3 2026
$1.2M

Why this company had to exist

Kalpa Perera spent more than fifteen years building software for other people’s companies - and watching the same pattern repeat: a founder bets on an idea, a team disappears into a black box, and the truth arrives late.

So he worked the opposite way. Ask the uncomfortable question early. Show the work every week. Make costs, risks and trade-offs visible before they become surprises.

Clients who hired him for a short fix stayed for years. OneSyntax is that way of working, turned into a company.

I started OneSyntax to work the opposite way - senior-led engineering that tells you the truth before we take your money, and every week after.
Kalpa Perera on LinkedIn (opens in a new tab) Founder OneSyntax Since 2018

The most trusted product development partner for European SaaS founders.

Our working day overlaps with European teams, making room for live conversations, product reviews and decisions together. You work directly with the people building your product, with a regular rhythm that keeps progress clear.

  • London: 10:00 AM BST UTC+1
  • The Netherlands: 11:00 AM CEST UTC+2
  • Sri Lanka: 2:30 PM UTC+5:30

Principles that change what clients actually experience

These are not poster values. Each one changes how we estimate, communicate and build.

Shared success

We measure what the business gained, not how many features shipped.

Radical transparency

Progress, risks, estimates and bad news stay visible.

Quality first

We build software you can still change in year five.

Continuous learning

Every sprint improves both the product and the team behind it.

Rapid validation

Working software reaches real users before the budget runs away.

Disciplined engineering

Proven practices protect the product long after the first release.

True partnership

We tell you when an idea will not work - before it costs you money.

The team you meet is the team that builds

There is no account-management layer between you and the work. The engineers in the first conversation are the people making decisions in your repository the following week.

Kalpa Perera on LinkedIn (opens in a new tab) Founder, OneSyntax

Fifteen years in - and still the most demanding code reviewer here

Kalpa remains hands-on across every project: shaping architecture, managing delivery and reviewing the work with the same care as when OneSyntax was one person and a laptop.

Clients notice two things quickly. He asks more questions than he answers at first. And he says what development teams often avoid: that a cheaper path exists, an estimate was wrong, or an idea should not be built.

I started OneSyntax to work the opposite way - senior-led engineering that tells you the truth before we take your money, and every week after.

Build good software. Grow with good people.

Join a team that cares about how software is built - and the people building it. Bring your curiosity, contribute your ideas, and take pride in work that lasts.

  • Work on products that matterUnderstand the business behind the code. Help build and improve real products through partnerships that continue beyond launch.
  • Learn through working togetherShare ideas, ask questions, and sharpen your skills through thoughtful code reviews and solving problems alongside your teammates.
  • Take ownership, with supportHave a voice in technical decisions and responsibility for your work, with a team you can turn to when the challenge gets harder.

Clients who stay and some who become friends

Leave DatesClient story

Phil Norton

Founder Leave Dates

Testimonial 2 of 3: Leave Dates video

Growth without adding distance

The company has grown, but the operating idea has not: stay senior-led, keep the work visible and remain close enough to tell the truth.

One partnership

The working model begins with direct access, visible progress and shared ownership.

A senior team

Long-running client relationships turn a personal way of working into a shared standard.

Products, not projects

A focused team supports active products across the UK and Europe without an account layer.

Book a call

Thirty minutes. Straight answers.

Book a call with Kalpa Perera on LinkedIn (opens in a new tab) Founder OneSyntax

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