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Embedded Development Partner

Technical Partnership

Not a contractor. Not a freelancer. An embedded technical partner who owns the architecture, ships the features, and is accountable for results — month after month.

Hiring a CTO takes six months and $200,000 a year. Hiring a dev team takes longer and costs more. Meanwhile, the product sits still, the market moves, and the window closes.

OneChair operates as your embedded technical partner. We handle architecture, build execution, scaling decisions, and ongoing feature delivery — at a fraction of the cost of an in-house team and without the six-month hiring process.

What a Technical Partner Is (and Is Not)

The distinction matters because the relationship is different from anything in the typical contractor or agency model.

Technical Partner

Embedded, Accountable, Continuous

A technical partner is embedded in your business — aligned to your goals, accountable to outcomes, and present across the full product lifecycle. They make decisions, not just follow them.

What We Do That a Contractor Does Not

  • Own the technical roadmap, not just the current ticket
  • Attend planning sessions and flag problems before they become incidents
  • Make architecture decisions with long-term consequences in mind
  • Advise on vendor selection, integrations, and infrastructure choices
  • Hire and onboard in-house engineers when the time is right
  • Provide technical due diligence for investors or acquirers

What We Are Not

  • A ticket-taking body shop that builds whatever is in the backlog
  • An agency with a project manager between you and the engineers
  • A fractional CTO who advises but does not build
  • A monthly retainer that sends reports with nothing shipped

We build. We advise. We own the outcome.

Engagement Models

We offer two structures, designed for different stages of growth.

Monthly Retainer

The ongoing partnership model. We are embedded in your product indefinitely — handling architecture, feature delivery, infrastructure, and technical strategy. Retainer clients get priority capacity, a dedicated point of contact, and weekly syncs built into the engagement.

Retainer is right when:

  • You have a live product and need continuous development
  • You want a technical decision-maker without the cost of a full CTO hire
  • Your roadmap evolves continuously and a fixed scope does not make sense
  • You are growing fast and need someone who grows with you

Project-Based

For founders who have a defined scope — a major feature, a platform rebuild, a new product line — but do not yet need ongoing support. Fixed price, defined delivery, with the option to continue into retainer after delivery.

Project-based is right when:

  • You have a clear scope with a defined endpoint
  • You want to evaluate the relationship before committing to ongoing engagement
  • You have specific milestones tied to fundraising or launch events

What We Handle

Areas of Ownership

01

Architecture

System design, data models, API contracts, infrastructure decisions. We make these calls and document them so the reasoning is clear to any future team.

02

Feature Shipping

MVP builds, feature additions, integrations, and product iterations. Delivered to a live staging environment so you see progress continuously — not just at demo day.

03

Scaling

Database optimisation, infrastructure scaling, caching, CDN configuration, and performance under load. We handle the growth problems before they become incidents.

04

Maintenance

Dependency updates, security patches, monitoring, and incident response. Production reliability is an ongoing commitment, not a one-time project.

Who This Is For

Technical partnership works best for a specific profile. If you match this description, it is worth a conversation.

Founders Without a Technical Co-Founder

You have the product vision, the market insight, and the business relationships. You do not have someone to own the technical execution. Hiring a CTO is expensive, slow, and risky before you have revenue to justify the salary. A technical partnership gives you CTO-level accountability at a fraction of the cost — and you can terminate it if the fit is not right.

Startups Without an In-House Dev Team

You have outgrown no-code tools or an early contractor arrangement. You need consistent velocity, architecture that scales, and someone who understands the full product context — not a new freelancer every three months.

Companies That Have Been Burned Before

You hired an agency. The project ran over time and budget, the code quality was poor, and the handover was a disaster. You want a partner who is accountable for ongoing quality, not just the initial delivery.

How the Partnership Runs

Every technical partnership includes the same baseline operating structure, adapted to your working style.

Weekly Syncs

A standing session to review what shipped, what is in progress, and what is coming next. We keep these tight — typically 30 minutes unless there is a technical discussion worth extending.

Live Staging, Always

Every feature in development is visible on a staging URL that updates as we build. You can review, share with stakeholders, and give feedback without waiting for a formal demo. This eliminates the surprise factor at delivery.

Direct Communication

No account manager layer. No ticket system as the primary communication channel. You reach the people doing the work. We use whatever async tool fits your team — Slack, Linear, Notion, email — and we come to you, not the other way around.

Technical Documentation

Architecture decisions are documented as they are made. API contracts, data models, deployment runbooks, and onboarding guides are maintained continuously. If you ever want to bring development in-house, the knowledge transfers with it.

Real Partnership Results

WingmanAI — Replaced a Full Development Team

A B2B sales intelligence startup had been working with a contractor team for four months. Nothing had shipped. The client came to us with a working prototype in their head and a deadline that was three weeks away. We became their embedded technical partner, rebuilt the architecture, and delivered the full platform — AI call coaching, real-time analysis, Salesforce integration, and a multi-tenant admin layer — in 33 hours of build time. We continue to handle ongoing feature development under a monthly retainer.

Read the WingmanAI case study

Givunity — 400% User Growth, Infrastructure Held

A nonprofit engagement platform experienced rapid user growth following a media feature. The existing infrastructure was not designed for the load. As their technical partner, we re-architected the data layer, implemented caching, and scaled the infrastructure ahead of growth events. The platform handled a 400% increase in concurrent users without downtime.

Read the Givunity case study

Transitioning to In-House

A technical partnership is not meant to be permanent by design. Some clients stay with us indefinitely because the model works for them. Others grow into a place where building an in-house team makes sense.

When that happens, we make the transition as smooth as possible. Documentation is already in place. The codebase follows standard patterns that any competent engineer can navigate. We provide handover sessions with incoming engineers and stay available for questions during the ramp-up period.

There is no lock-in. We want clients to succeed — in whatever structure that success requires.

Looking for a single build rather than ongoing partnership? See our custom software development or MVP development services.

Common Questions

A contractor delivers a defined scope and moves on. A technical partner is embedded in your business — they understand your product strategy, make architectural decisions alongside you, and are accountable for outcomes rather than hours logged. We attend your planning sessions, own the technical roadmap, and flag problems before they become incidents.

We offer two models: a monthly retainer for ongoing partnership (architecture, feature shipping, scaling, maintenance), and project-based for defined scopes. Retainer clients get priority capacity and a dedicated point of contact. Both models include weekly syncs, real-time staging visibility, and direct communication — no account manager layer.

For many early-stage companies, yes. We handle the technical decision-making, architecture, vendor selection, team hiring advice, and build execution. We have replaced both full in-house dev teams and fractional CTOs for clients who needed execution speed rather than strategy alone. WingmanAI is an example — we replaced a team that had been building for four months and shipped in 33 hours.

Weekly syncs by default, more frequent during active build phases. You have direct access — no ticket system, no account manager layer. Staging environments are updated continuously so you can see progress without waiting for a call. Async updates for anything that does not need a meeting.

We actively support the transition. All code is documented, the architecture is standard and well-understood, and we provide handover sessions with any incoming team. We have helped clients hire their first in-house engineers and then guided those engineers through the codebase. There is no lock-in — we want clients to grow into whatever structure works for them.

No Commitment Required

Let's Talk Partnership

Tell us where you are and where you need to go. We will be direct about whether a technical partnership is the right fit — and what that would look like.

START THE CONVERSATION