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Sheet 01 · Chad Koslovsky

Frontend craft. Full-stack ownership.

Senior Frontend/Full Stack Engineer · AgentSync

React and TypeScript product engineer who owns the experience from interface design through APIs, identity and production support. Builds connected client workflows and stays close to the people using them, with practical AI orchestration and a systems background.

Sheet 02

Cover letter

I call myself a technomancer. Technology has felt like magic to me since I was a kid, and I still get a kick out of taking something complicated and making it feel natural to use.

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Hi AgentSync team,

I call myself a technomancer. Technology has felt like magic to me since I was a kid, and I still get a kick out of taking something complicated and making it feel natural to use. The interface is where that happens for most people. It is also where all the decisions underneath finally have to make sense.

Your posting caught my attention because you are asking for someone to own that whole experience, not just turn a design into components. A new React and TypeScript app, shared packages, a design system and the freedom to work out the UX alongside the code is the kind of responsibility I enjoy. I have spent years moving between frontend design, application logic and the systems that keep the product running. React is familiar territory, but I do not like stopping at the edge of a component when the real problem is somewhere else.

That interest in how interfaces fit together also led me to build my own framework: Kerf, formerly Weft, with its own TSX compiler and the Warp UI toolkit. It is still early, but working on reusable UI contracts, routing and useful diagnostics for coding agents has made me think much harder about the foundations I would normally take for granted. Your shared design system and AI-native way of building are a big part of why this role interests me.

Through Technomancy IT, I take client needs from the first incomplete conversation through the product, deployment and ongoing support. My own platform brings customer records, support, scheduling and billing together in TypeScript, Next.js and PostgreSQL. I have implemented OAuth/OIDC flows and tenant-aware services, so access boundaries are part of how I think about an experience, not something to bolt on after the screen works. I also bring in other specialists when the work benefits from their craft and make sure the pieces hold together.

Proofmark is a useful example of how I approach a complicated workflow. My completed client contribution connected identity, document fields, signing routes, audit history and verification across a React/Next.js interface and its APIs and data. The person signing needs to understand what is happening and what comes next. Keeping the underlying state and fallback paths explicit matters just as much as making the page look good. I see a similar design challenge in your producer onboarding: making the next step clear without hiding the rules that determine whether someone is ready to sell.

NuPrice taught me another side of that ownership. I built and operated the full reseller application for a long-term client, including pricing rules, accounts, subscriptions, billing and support. When you are also helping the people using the software, you learn quickly which decisions actually make their day easier.

I use AI as an extension of my engineering work, including tool-aware workflows, structured outputs and evaluation. I like the direction you describe: make the problem clear enough that another engineer or an agent can carry it forward, then take responsibility for what comes back. My backend strength is Node.js and API-driven systems; my Go and Java exposure is more limited. I would bring the frontend and product ownership you need while learning your service stack properly.

I am based in Milliken, Colorado. I would enjoy helping your team make all that insurance infrastructure feel straightforward for the people who rely on it. When the hard parts are handled well enough that someone can simply get on with their work, that still feels like magic to me. Let’s talk.

Chad

Sheet 03

Experience

Technomancy IT LLC · 2015-Present

Founder / Product Engineer / Systems Lead

Own client products from discovery through interfaces, APIs and production support. Build OAuth/OIDC flows and tenant-aware shared services; coordinate specialist contributions.

Deep dive

I built Technomancy around taking responsibility for the whole client problem, from understanding the workflow to building the application and supporting it in use. The work combines product decisions, typed APIs, deployment and direct client communication.

Application and API authentication includes OAuth/OIDC, PKCE and token exchange. Tenant-aware shared services keep client-facing products, internal tools and engineering workflows connected without treating their access boundaries as interchangeable. I bring in specialists where the project benefits from their craft and remain responsible for the delivery and support model.

NuPrice | Client engagement within Technomancy IT · 2019-2021

Product Engineering and IT (Long-Term Contract)

Built and operated a reseller application joining pricing rules, accounts, subscriptions, billing and embedded support. Sustained client ownership began alongside FRII.

Deep dive

NuPrice was a long-term client engagement from 2019 to 2021, beginning while I was still at FRII. I built and operated the reseller application and owned its billing, customer support and technical operations.

The application brought marketplace and competitor data into user-defined repricing rules and automated price decisions, with monitoring and analytics alongside accounts, subscriptions, a CMS and embedded support. That sustained responsibility meant following issues from the customer-facing workflow through the application and its operation. The product was acquired; my role was the client’s technical delivery, not ownership of the company.

Front Range Internet Inc. · 2015-2020

Senior Systems Engineer / Datacenter Architect

Led NOC operations and production escalations, migrated workloads into Docker and Kubernetes, and ran SOC 1/SOC 2 audits. Connected engineering changes with operating responsibility.

Deep dive

At Front Range Internet Inc., I ran the NOC and was a lead engineer through a company purchase. Later, after the senior engineer above me left, I took sole systems-engineering responsibility for approximately a year, with the NOC continuing first-line coverage and escalating issues to me. That was one period within my 2015–2020 tenure, not the whole engagement.

I migrated workloads from Hyper-V and VMware ESXi to Docker and Kubernetes, upgraded server and firewall infrastructure, and owned recovery verification, monitoring, escalations and engineering procedures. Terraform and Ansible supported repeatable infrastructure work. I also ran the SOC 1 and SOC 2 audits and worked with the CEO and CIO while keeping the operating environment supportable through change.

Office Evolution · 2014-2015

Systems / Software Engineer

Built SQL/MongoDB applications connecting CRM, provisioning, onboarding and service operations across locations; translated cross-department handoffs into explicit workflows.

Deep dive

Office Evolution’s operational work crossed departments and locations. I built centralized SQL- and MongoDB-backed applications connecting CRM, provisioning, onboarding and service operations so those handoffs were represented in shared systems.

The role combined software with the architecture around it: learning how people needed to work together, translating the handoffs into explicit workflows and supporting the surrounding systems across locations and client environments. I worked with the CEO and CIO as part of that delivery.

PlumChoice / Everon · 2012-2014

Network & Systems Engineer

Engineered SMB networks and endpoints, built diagnostic tools and handled on-call issues directly with clients.

Deep dive

At PlumChoice / Everon, I worked as a network and systems engineer across managed-service clients, supporting networks and endpoints and communicating directly with business owners and end users. The work required diagnosing a problem in its business context rather than stopping at a single device.

I used monitoring and diagnostic tooling, built support tools around recurring operational needs, and handled on-call issues. Working across client environments developed the practical troubleshooting and communication I still bring to software delivery and production support.

IBM · 2010-2012

Infrastructure and Systems Focal

Supported enterprise infrastructure, automated audit/backup workflows and coordinated cross-team changes.

Deep dive

At IBM, I was the infrastructure and systems focal for shared enterprise environments. The work crossed application, infrastructure, vendor and business teams, with incidents and changes requiring coordinated ownership rather than isolated fixes.

I automated audit and backup workflows, managed virtualization test labs and hosted desktop platforms, and supported access, change and escalation work around shared infrastructure. That experience established an operating perspective that complements my later full-stack product work.

Sheet 04

Selected work

Completed client contribution · Client project

Proofmark | Clear signing workflows

Connected identity, document fields, signing routes, audit history and verification across React/Next.js, APIs and data. Kept security-sensitive state and fallback paths explicit.

Deep dive

My completed client contribution to Proofmark connected document signing across identity, PDF fields, routing, audit history, verification, encryption, webhooks and embedded signing. The implementation spans React/Next.js, tRPC, Drizzle, PostgreSQL and Rust.

I kept security-sensitive state and fallback paths explicit so the interface and the system behind it describe the same workflow. This is a completed engineering contribution to an AGPL/open-source product, not a claim that I alone created or finished the entire product, or that it carries legal or regulatory certification.

Long-term client engagement · 2019-2021

NuPrice | Product ownership beyond the interface

Built and operated a reseller application joining pricing rules, accounts, subscriptions, billing and embedded support. Sustained client ownership began alongside FRII.

Deep dive

NuPrice was a long-term client engagement from 2019 to 2021, beginning while I was still at FRII. I built and operated the reseller application and owned its billing, customer support and technical operations.

The application brought marketplace and competitor data into user-defined repricing rules and automated price decisions, with monitoring and analytics alongside accounts, subscriptions, a CMS and embedded support. That sustained responsibility meant following issues from the customer-facing workflow through the application and its operation. The product was acquired; my role was the client’s technical delivery, not ownership of the company.

Project overview ↗

Independent framework and UI toolkit · In development

Kerf / Warp | Frontend architecture from the compiler up

Building an agent-oriented TSX framework with its own compiler and Warp UI toolkit. Reusable UI contracts, routing, authentication and data are part of the architecture; the project remains in early development.

Deep dive

After years of React and TypeScript work, I started building my own approach: Kerf, formerly Weft, a TSX framework with its own compiler, and Warp, the UI toolkit alongside it. The full-stack design includes routing, authentication and data.

I am interested in reusable UI contracts and developer experience, including compiler errors that give coding agents something actionable to work with. The project is in early development. It is an independent framework, not React, and the preview is not evidence of production adoption or performance benchmarks.

Kerf framework preview ↗

Sheet 05

Capabilities

  • React, TypeScript and responsive interface design
  • Node.js, typed APIs and PostgreSQL-backed workflows
  • OAuth/OIDC, PKCE and tenant-aware access
  • AI tool orchestration, structured outputs and evaluation
  • Product discovery, production support and technical ownership