Backend and API development in New York
In New York, the backend work that reaches us is rarely a fresh API. It is the job that runs overnight: pulling positions from a custodian, prices from a market data vendor and trades from an order system, then producing a number that operations checks before the market opens. When it fails, somebody finds out at their desk, and the fix is a manual rerun nobody fully trusts.
We make those jobs dull. Every feed is ingested idempotently, so a rerun cannot double-count. Every mismatch lands in a table a person can read, not a log line nobody opens. Each vendor file is kept exactly as it arrived, so a disputed figure can be traced to its source months later. And because every step is recorded, the question operations asks each morning, which figure changed and why, has an answer before the market opens.
Most software bought in New York is bought by companies that do not think of themselves as software companies. Banks, insurers, asset managers, publishers, agencies, fashion houses and property firms all run on systems that sit beside the real business: a client portal, a pricing engine, a reconciliation job, a content pipeline. Those systems rarely start from nothing. They connect to a vendor platform, a core system older than the team, and a folder of spreadsheets someone updates by hand, and the brief is usually to make all three agree.
What those companies need built follows the industry. Asset managers and insurers need client portals where a family office sees two funds and not a third, and overnight jobs that reconcile custodian, market data and order feeds before the market opens. Publishers and ad-tech firms need event pipelines whose delivery numbers agree across vendors, and front ends that stay fast under the ad stack. Property firms need apps for technicians working in basements with no signal. And founders who left one of these industries need a first version in front of a pilot customer before the interest cools.
Hiring is the constraint. Engineers here are courted by banks, big tech offices and funded start-ups at the same time, and Built In puts the average software engineer base salary in the city at about $160,000 before bonus. The shape this produces is a small in-house team that keeps the core systems running, and behind it a list of well-defined projects that nobody on that team will reach this year. That list is where we are useful: each project is a defined piece of work, it starts with a fixed-price two-week piece, and the code belongs to you from the first commit.
We are in Bengaluru and move our working day for New York. Four hours of every working day overlap with your morning in Eastern time, stand-up included, so decisions and code review happen live with the engineer who writes the code. Runbooks and architecture notes are written as we go, so your in-house team can run what we build long after the project is finished.
We are the right fit for the defined projects your in-house team is too stretched to reach this year: a client portal, a reconciliation job, an event pipeline, a first version for a pilot customer. Senior capacity starts within days, the first piece is a fixed-price two-week engagement, and agencies can ship the work under their own name.
Four ways this arrives.
We read the code, write down what it does versus what everyone believes it does, and give you the list of the five things most likely to page someone at night. Then we fix those first.
Usually queries, not architecture. We profile under real traffic, fix the plans and the indexes, and only then discuss whether anything needs splitting apart.
A mobile client, a partner integration, a public API. We design the contract first, version it properly, and write the docs your consumers will read.
Jobs that silently vanish, retries that duplicate charges, a queue nobody monitors. We make it idempotent, observable, and boring.
A moderated messaging backend where sends acknowledge in-band and the review runs behind them.
Read the write-up →Asked by New York teams.
How do you work with teams in New York?+
We are in Bengaluru and move our working day for New York, so four hours of every working day overlap with your morning in Eastern time, stand-up included. Calls, reviews and decisions happen in that window, and the rest of the conversation runs in your tools: Slack, GitHub, Linear. The person on every call is the engineer who writes your code, and the code sits in your repositories from the first commit.
Do you build for New York financial firms?+
Yes. The work is usually the systems beside the trading or underwriting desk: overnight jobs that reconcile custodian, market data and order feeds before the open, client portals where investors, brokers and their accountants each see exactly what they should, and internal tools that replace a pricing or renewals workbook only one person understands. We build them to be idempotent and traceable, so every figure can be followed back to the file it came from.
How does your rate compare to hiring in New York?+
Built In puts the average software engineer base salary in New York City at about $160,000, before bonus and benefits. Our published rate is $35/hour, or $5,400 a month for an embedded engineer, with a $5,000 minimum. There is no recruiting time and no employment overhead, and work starts within days of the call. The first piece is a fixed-price two-week engagement at $2,800, so you judge us on working code.
Can you take over a system another vendor built?+
Yes. In New York that is often a client portal or an internal tool built by an agency that has since moved on, with nobody in-house who knows how it runs. We start by reading the code and running it, then write down how it works and where it is fragile before changing anything. A good first two-week piece makes the riskiest part safe and leaves your team runbooks it can use.
Can you work in our existing codebase?+
Yes, and it is most of what we do. We do not require a rewrite as a condition of working with you. If we think a rewrite is genuinely the right call we will say so, with the reasoning and the cost, and you can decide.
What if the backend is in a language you do not list?+
Then we will tell you. We are useful in Node, Python and TypeScript. We can read Go and PHP well enough to migrate off them. We would not take a Rust or Elixir project and learn it on your budget.
Do you write tests?+
For anything with money, permissions or data loss in it, yes. We do not chase a coverage number. We will tell you which parts are covered and which are not in the handover notes.
Who owns the code?+
You do, from the first commit. Repositories live in your organisation. If we set them up, we transfer them before the first invoice.
What happens when the engagement ends?+
You get runbooks, architecture notes and a recorded walkthrough. We stay available for questions for a month at no cost, because a handover that needs us on retainer is not a handover.