Staff Augmentaion
Hire Dot Net API Developer in USA,
shipping code inside five business days.
An open API seat stalls every app and partner that calls it. When you hire .NET API developers in USA through Brain Station 23, senior engineers are shipping PRs into your repo by day five, on your standup, under your code review and inside your Azure DevOps or GitHub pipeline. A dedicated seat starts from $2,500 a month.
Get senior .NET API engineers by day five.
Tell us what you are shipping, a new public API, a partner integration or a WCF service that needs moving. We will line up senior engineers who match your stack.
Why Choose .NET API Developers in USA
Most line-of-business systems in your market expose their data through .NET. The engineers who design those APIs decide how fast every app, partner and report can move.
HIPAA, SOX, PCI DSS
Health records, financial reporting and card data move through .NET APIs, and each audit asks who can call what.
Support dates are fixed
.NET 8 support ends in November 2026. Every API still on it needs a plan for .NET 10 before then.
Engineers who have run live APIs
Timeouts, retry storms, expired tokens and breaking changes. Senior judgment is learned on endpoints with real callers.
Your code under federal law
Assignment terms enforceable under federal copyright law from the first commit.
Microsoft, Azure and NuGet
.NET is open source, maintained by Microsoft, with a new major release every November and a deep NuGet ecosystem.
4-hour live overlap
Bangladesh to Eastern Time gives you four shared hours a day, 9 AM to 1 PM New York, where both teams are at full capacity.
Four things that start working when the right team shows up.
Hover or tap a card to see what changes.
Velocity
Endpoints, fixes and integration tickets move in the same sprint. First PR by day five.
ShippingMath that works
One backlog, one pipeline, one release train. Throughput is the metric, not the hourly rate.
LiveRisk reframed
.NET APIs rarely fail on controllers. They fail on auth, versioning, data access and deployment.
WatchedPosition locked
A partner API live before a contract start date or a quarter close is a market position. A slipped release costs more than the sprint.
TrackedWhat a .NET API Development Company in USA Does
First PR ships in five days, not five sprints.
Understand the gap
A new public API, a stalled integration roadmap, a WCF service you cannot upgrade, or plain throughput.
Match seniority to the actual gap
Three CVs with production APIs we can walk you through. Two technical conversations with you. You pick.
First PR by day five
Engineer in your repo, on your Slack and in your standup, with the solution building locally and in your pipeline.
Senior judgment, your patterns
ADRs into your repo. PR reviews by your tech lead. Latency, error rates and deployment frequency on your dashboards.
Scale with demand
Need a QA engineer, an API Management specialist or a SQL Server DBA next month. Three days from request to start.
Handover or extend
Pipelines, OpenAPI specs, infrastructure as code, runbooks and ADRs checked into your repo. No black box. Most clients extend.
Which one of these sounds painfully familiar?
Click a scenario to see what changes.
Scaling startup
The product found its market. Partners want an API, the mobile app needs new endpoints, and the roadmap is committed for two quarters.
HotMid-market platform
Your senior .NET API engineer gave notice, and three partner integrations are due this quarter.
WatchingLegacy WCF services
Integrations still run through WCF and ASMX services on .NET Framework 4.x, and every partner change needs a Windows server nobody wants to touch.
TrackedThe API roadmap ships without a hiring freeze.
Two senior .NET API engineers shipping into your repo by day five, on the public API and the mobile endpoints at once. Your own team stays on the product decisions.
The bill you are already paying for being under-staffed.
Upgrade debt
Every month on an unsupported .NET version or a WCF endpoint adds security patches you cannot take and packages you cannot update.
Senior tax
Your most senior .NET engineer spends the week on production incidents and partner escalations. Architecture decisions wait.
Hiring overhead
Recruiter fees, interview loops and ramp time. Four months is quick. Six is normal.
Slow endpoints, lost partners
Unindexed queries and chatty endpoints turn into timeouts, retry storms and partners who start building around you.
30 days from hello to production.
20-minute call
The actual gap. Release timing. .NET version, hosting and who calls the API. No deck.
Three CVs
Each with production work we can walk you through. Two technical conversations. You pick.
Onboard
Repo access, local build, pipeline access, standup. First PR by Friday.
Release cadence
First production release out. Familiar by week 2, velocity stable by week 4.
Wins for USA teams, in the business not just the codebase.
Partner data API live eight weeks early.
Two senior .NET API engineers put an ASP.NET Core API with OAuth scopes and audit logging over existing clinical data, while the HIPAA controls stayed in place.
8 weeks ahead of the vendor quotePayments API versioned without breaking a partner.
A WCF payments service on .NET Framework 4.7. Three engineers rebuilt it as versioned REST and gRPC endpoints, and each partner moved over on its own schedule.
Zero partner integrations brokenDispatch API response times cut by more than half.
Entity Framework queries were timing out at peak. A pod of three rewrote the hot paths, added Redis caching and put load tests on every pull request.
p95 latency down by more than halfOrder API moved to Azure before the holiday peak.
Four engineers moved an on-premises order API to Azure App Service and Azure SQL behind API Management in nine weeks, with autoscaling tested before peak week.
4x normal traffic, zero downtimePick the one that matches your current chaos.
1 to 6 senior engineers into your team
Dedicated .NET API developers in your repo, your standup and your review queue. We handle hiring, payroll and performance.
A .NET API squad with its own lead
3 to 5 engineers with a tech lead, a QA engineer and a PM. Your roadmap, our delivery, a staging deploy for review every week.
Fixed scope, fixed timeline
An API or integration layer from contract to go-live, or one WCF migration. Two-week sprints, weekly demos, handover at the end.
Two-week paid API audit
Endpoint contracts, auth, performance data and the upgrade path to .NET 10, written up with ADRs in your repo.
Cost to hire Dot Net API Developers in USA in 2026
Published ranges from named sources, beside what an augmented seat costs. If you are comparing .NET API developers for hire in USA, compare the whole row, not only the price.
| Route | Typical cost | Time to first PR | Live overlap | Commitment |
|---|---|---|---|---|
| In-house hire | $96K to $128Kbase salary a year, before benefits and recruiting | Months, after the search | Full day | Permanent, plus a notice period |
| Freelance or contract | $60 to $100+per hour, vetted freelance networks | 1 to 3 weeks | Full day, if local | Per project, no bench behind them |
| Nearshore team | $35 to $80per hour, mid to senior, Mexico | 2 to 4 weeks | 6 to 8 hours | Usually 3 months minimum |
| Offshore marketplace | $17 to $35per hour, typical range, $25 median | Days, but unvetted | Varies | None, and no continuity |
| Brain Station 23 augmentation | From $2,500 a monthdedicated seat, fully loaded, no recruiting fee; or $25 to $40 an hour. Monthly is the better value | 5 days | 4 hours, 9 AM to 1 PM Eastern | 30-day notice, both ways |
Sources: ZipRecruiter, .NET Developer salary, 25th to 75th percentile, September 2026 (average $111,761), and Web API Developer pay, $54.57 to $67.31 an hour, September 2026; Arc.dev, .NET developer hiring page, September 2026; Curotec, nearshore developer hourly rates by country, 2026; Upwork, .NET developer cost page, 2026. Third-party ranges as published on the dates shown. You can also book .NET API developers by the hour at $25 to $40, though a dedicated monthly seat works out cheaper.
Pay for the time zone
A local senior hire gives you the full working day and the highest bill, before benefits and recruiting.
Pay for the overlap
Mexico and Colombia buy you six to eight shared hours at roughly double the offshore rate, usually with a three-month minimum.
Pay for the outcome
A dedicated seat from $2,500 a month, four live hours a day, a tech lead on the account and a replacement in three days.
What to Check Before You Hire .NET API Engineers in USA
Six questions that separate vendors who can answer them from vendors who cannot.
Which production APIs has this engineer run?
Endpoints with real callers and real data, not a list of frameworks. Ask which parts they built and what broke.
Who owns the repo, the Azure subscription, the API keys and the secrets?
You do, from day one. If a vendor hosts your system in its own tenant, your platform is not portable.
Have they versioned an API with live clients?
Breaking changes, deprecation windows and contract tests that kept partners running. Greenfield projects never meet the hard part.
Can I see latency and error rates, not a slide?
p95 latency, error rates, deployment frequency and test coverage from comparable APIs.
What is the actual time to first PR?
Five days. If it is three weeks, that is a recruiting agency, not a .NET API practice.
What happens at handover?
Pipelines, OpenAPI specs, infrastructure as code, runbooks and full ADR documentation checked into your repo, not held by the vendor.
How we vet .NET API Developers before you meet them
Four gates, in order. Every engineer we put forward has passed all four, and you still run your own interview.
CV and production portfolio screen
We read the CV against APIs the engineer has run in production, and check which endpoints and integrations they built.
Proves production shippingTechnical interview
A senior engineer covers C#, ASP.NET Core middleware, REST and gRPC design, authentication, Entity Framework, async code and profiling.
Proves depth, not keywordsPaid live coding on a real ticket
A paid session on a realistic ticket with a slow endpoint and a failing contract test, reviewed like any pull request.
Proves how they work under reviewReference and background check
Former leads confirm delivery, and a background check runs before any access to client systems.
Proves they are who they sayWhat to look for before the interview
Eight things to screen a .NET API developer CV against, whoever you hire from.
In the code
Beyond the code
Why teams renew after the first engagement.
Senior .NET API engineers live in your Eastern morning, 9 AM to 1 PM, every working day.
Planning, code review, release calls and incident response happen inside that window.
Vetting that is real
Production portfolio review, technical interview, paid live coding and reference checks on every engineer.
Flex on both sides
30-day notice, both ways. Add a QA engineer or an Azure specialist in 3 days when a release needs it.
Continuity built in
Two-engineer minimum on every account. A backup shadows for one sprint at any rollover.
The system is yours
Your repo, your Azure tenant, your API keys, your IP. ADRs documented. No black box at exit.
What changed in their business.
Rated 4.9 out of 5 across 21 reviews on our Clutch profile, including the one thing reviewers asked us to improve.
Paraphrase: reviewers score the quality of the work at 5.0 out of 5, the highest of the four Clutch sub-scores.
Paraphrase: reviewers rate value for cost at 4.9 out of 5, and describe budgets that held from the first estimate to delivery.
Paraphrase: reviewers asked for better internal coordination. That is why every account now has one named tech lead inside your overlap window.
What our .NET API Developers build, in plain language
Engineers embedded in your product team
1 to 6 senior engineers inside your existing squad, building REST and gRPC APIs, integrations and background services on your board and your review process.
API modernization crews
WCF and ASMX services moved to ASP.NET Core Web API and gRPC on .NET 10, versioned so existing clients keep working while the new contracts land.
APIs that stay up under load
Gateways, caching, rate limits and autoscaling on Azure or containers, with monitoring and rollback plans in place before launch.
What our .NET API Engineers cover, by name
The names buyers ask about most, and what we do with each.
ASP.NET Core Web API.NET 10
Controller and minimal APIs on the current long-term support release, with model validation, filters and ProblemDetails errors.
C#
Records, pattern matching, async streams and nullable reference types, used where they make the code clearer.
gRPC
Protobuf contracts for service-to-service calls, streaming where it pays, and JSON transcoding for REST clients.
GraphQL and Hot Chocolate
Code-first GraphQL servers with DataLoader batching to stop N+1 queries.
OpenAPI and Swagger
OpenAPI documents generated from code, typed clients and versioned docs partners can read.
Entity Framework Core and Dapper
EF Core for most data access, Dapper for the hot paths, migrations kept in source control.
SQL Server and PostgreSQL
Schema design, indexing and query plans, on premises, in Azure SQL or in Amazon RDS.
OAuth 2.0 and OpenID Connect
JWT bearer auth with Microsoft Entra ID or Duende IdentityServer, scopes and policy-based authorization.
Azure API Management and YARP
Gateways, keys, rate limits and a developer portal, or YARP for routing and staged migrations.
Service Bus, RabbitMQ and MassTransit
Asynchronous APIs and integration events with retries, dead-letter queues and the outbox pattern.
Docker and Kubernetes
Linux containers for .NET services, deployed to AKS or Azure Container Apps with health checks.
xUnit and contract tests
Unit, integration and consumer contract tests on every pull request.
Brain Station 23: Powerhouse of the Best .NET API Engineering in USA
Brain Station 23 has put engineers into client codebases since 2006, from Bangladesh and an office in Springfield, Virginia. As a .NET API development company in USA, we work under SOC 2 Type II, ISO 27001, CMMI Level 3 and GDPR-aligned controls.
Engagements across USA.
Nashville, Seattle, Chicago, New York and San Francisco. Same playbook and the same code review discipline on every account.
Questions you should ask before signing.
Five business days from the first call to the first PR. Three CVs inside three days, two technical conversations, and the engineer you pick is in your repo, your pipeline and your standup by day five.
With Brain Station 23, a dedicated full-time seat starts from $2,500 a month, fully loaded with no recruiting fee, or $25 to $40 an hour for hourly work. For comparison, ZipRecruiter put the base salary for an in-house .NET developer at $96,500 to $127,500 a year in September 2026, before benefits, equipment and recruiting.
Screen CVs against APIs they have run in production, interview on API design, authentication and data access, run a short paid task, then check references. Our vetting runs those four gates before you see a CV.
Yes. .NET 10 shipped in November 2025 as a long-term support release, and .NET 8 support ends in November 2026, so every API still on .NET 8 or on WCF needs engineers who can plan the move. ZipRecruiter lists average pay of $59.89 an hour for API developers in September 2026.
The eight-point checklist above covers it. If you check only one thing, ask which API they kept running after launch and how they shipped a breaking change.
Onshore gives the full working day at the highest cost. Nearshore in Mexico gives six to eight shared hours at $35 to $80 an hour. Offshore with a tech lead gives four live hours at a fraction of either.
All three. REST with OpenAPI for partners, gRPC between your own services, and GraphQL with Hot Chocolate when front ends need flexible queries.
Yes. A two-week audit first, then each service moves behind a gateway, contract by contract, while existing clients keep calling it. No big-bang rewrite.
Tell us inside the first two weeks and a replacement is in your repo three days later, at no extra cost, with one sprint of overlap.
You do, from day one. Code stays in your repo, APIs run in your Azure tenant and keys stay in your Key Vault, never ours. Every engineer signs an NDA governed by federal law.
30-day notice, both ways. Scale up by adding engineers, with a 3-day start. Scale down by giving notice. No minimum beyond the notice period.
Nearshore buys more overlap at a higher rate. We give four live hours with Eastern Time and twenty years of client work in USA. If you need six live hours a day, we will say so.
Every system on this page started with one phone call.
Twenty minutes. Your actual system, your actual gap, and what a senior .NET API engineer in your repo by Friday would change.
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