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Sheet 01 · Chad Koslovsky

Business applications, from workflow to production

Senior Software Engineer · LendingTree

I build business applications and stay responsible for the systems behind them. My work connects customer workflows with data and service boundaries, informed by years of hands-on production support.

Sheet 02

Cover letter

I call myself a technomancer because technology has felt like magic since I was a kid. I still get that feeling from making complicated systems useful to people, and your Insurance team's mix of customer workflows, service integrations and care for existing applications is work I would enjoy.

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Hi LendingTree team,

I call myself a technomancer. Technology has felt like magic to me since I was a kid, and I still love the moment when something complicated becomes useful to someone else. That is what draws me to your Insurance engineering team: helping people compare their options depends on the less visible work of keeping applications, data and service handoffs dependable.

Your posting gives as much attention to supporting existing software as it does to building new features. That feels familiar. Through Technomancy IT, I take client needs from an unfinished idea into a working system and stay involved in the product, infrastructure and support behind it. I enjoy understanding why a process works the way it does before deciding which parts to change.

ProofMark is one example of that work. I completed a client engineering contribution to its document-signing workflow, connecting identity, PDF fields, recipient routing, audit history and integrations. The work crossed React interfaces, typed APIs and PostgreSQL data, with webhooks and embedded signing joining the surrounding workflow. Keeping security-sensitive state and fallback paths explicit mattered because a signing screen is only useful when the record behind it makes sense.

For my own practice, I have built a client-operations platform with TypeScript, Next.js and PostgreSQL. It connects support tickets with companies, contracts, invoices, devices and infrastructure context, while tenant-aware services preserve access boundaries. I also built delivery and restore-verification tooling: deployment scripts record image identity, apply migrations and check service health, and a separate workflow restores backups into a disposable database. Those are practical tools for understanding a release and investigating what happened afterward.

I am also building Kerf, an early-development TypeScript/TSX framework with its own compiler and full-stack routing, authentication and data architecture, alongside its UI tools. Its direct page updates and actionable compiler diagnostics reflect my interest in making UI code easier to reason about, including when coding agents help write it. I use AI heavily in my engineering work, but the design decisions and the responsibility for the result remain mine. Kerf is a separate framework from React; my longstanding React experience is part of my application work, including ProofMark.

Earlier, at Office Evolution, I connected CRM, onboarding, provisioning and service operations through centralized applications, working across departments and with the CEO and CIO. At Front Range Internet Inc., I ran the NOC, handled production escalations and migrated workloads from Hyper-V and ESXi into Docker and Kubernetes. Those roles taught me to connect a technical decision with the people who will operate and depend on it.

My strongest application experience is in TypeScript, React, Node.js and PostgreSQL. My C# and .NET exposure is limited, and I would need to learn your ASP.NET and SQL Server conventions. I appreciate that your team welcomes comparable experience and values the judgment to work carefully in an established codebase. I would bring that approach, curiosity about the Insurance business, and a willingness to make tradeoffs clear early.

I am based in Milliken, Colorado, and would welcome a conversation about the Denver team and the applications you are evolving. Thank you for taking the time to get to know my work.

Chad

Sheet 03

Experience

Technomancy IT LLC · Present

Founder / Product Engineer / Systems Lead

Lead a referral-based technical practice, carrying client needs through application design, delivery and ongoing support.

Build tenant-aware shared services and authenticated APIs; delivered access-controlled connectors and automation across client business tools.

Deep dive

I grew freelance work into a referral-based technical practice and remain accountable for product, data, infrastructure and support choices. The work includes OAuth/OIDC application and API authentication, PKCE and token exchange, as well as selected enterprise identity integrations. Tenant-aware policy and observability keep shared services usable across client products and internal workflows. Access-controlled connectors and automation span Slack, Google Workspace, Atlassian and internal tools. I bring in specialists when a project benefits from their craft, and clients also contact me directly for on-call IT support.

NuPrice | Client engagement within Technomancy IT · 2019-2021

Product Engineering and IT (Long-Term Contract)

Built and operated a client reseller application connecting marketplace and competitor data to user-defined repricing rules, monitoring and analytics.

Owned accounts, subscriptions, billing, embedded support and technical operations. The engagement began alongside FRII; the product was acquired.

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 full application, billing, support and technical operations. Marketplace and competitor-data ingestion fed user-defined repricing rules and automated pricing decisions, with monitoring, analytics, accounts, subscriptions, a CMS and embedded support around that core. The product was acquired. This was client engineering and operational ownership, not a claim that I founded or owned the client company.

Front Range Internet Inc. · 2015-2020

Senior Systems Engineer / Datacenter Architect

Ran the NOC and handled production escalations, with lead engineering responsibility through the company transition.

Migrated workloads from Hyper-V and VMware ESXi to Docker and Kubernetes, upgraded server and firewall infrastructure, and led SOC 1 and SOC 2 audits.

Deep dive

My FRII tenure ran from 2015 to 2020. I ran the NOC and served as an escalation engineer, working with the CEO and CIO and taking lead engineering responsibility through the company purchase. During the later period when I held sole systems-engineering responsibility, first-line NOC coverage continued. I migrated workloads from Hyper-V and VMware ESXi into Docker and Kubernetes and upgraded server and firewall infrastructure. I also led FRII's SOC 1 and SOC 2 audits, turning technical controls into auditor-readable evidence and SOPs. That describes audit ownership and readiness work, without implying a certification or independent external attestation.

Office Evolution · 2014-2015

Systems / Software Engineer

Built centralized applications joining CRM, onboarding, provisioning and service operations across locations.

Turned cross-department handoffs into explicit workflows and worked with the CEO and CIO on the systems supporting the business.

Deep dive

Office Evolution needed operational work to connect across departments and locations. I built centralized applications linking CRM, provisioning, onboarding and service operations and made the handoffs explicit. My systems/software engineering work included cross-location architecture and collaboration with the CEO and CIO. The resulting shared systems gave those operational processes a common application layer.

PlumChoice / Everon · 2012-2014

Network & Systems Engineer

Engineered and supported managed-service client networks and endpoints, communicating directly with business owners and end users.

Built diagnostic and support tooling around recurring problems, using monitoring and on-call response to investigate and recover client systems.

Deep dive

I worked as an engineer for the managed-service provider PlumChoice / Everon, handling client networking, systems and broad hands-on IT. Monitoring and repeatable diagnostic tooling supported investigation and recovery, alongside direct communication with business owners and end users and on-call responsibility. Network & Systems Engineer is the owner-authorized functional display title for that documented scope; Network Engineer was the employer-used description.

IBM · 2010-2012

Infrastructure and Systems Focal

Supported shared enterprise infrastructure across application teams and customer environments.

Automated audit and backup workflows and coordinated changes, incidents and escalations with application, infrastructure, vendor and business stakeholders.

Deep dive

At IBM, I served as the infrastructure focal for shared enterprise environments used by application teams and customers. I automated audit and backup workflows and managed virtualization test labs and hosted desktop platforms. Change, incident and escalation work required coordination across application, infrastructure, vendor and business stakeholders. That operational background informs how I approach application changes whose consequences extend beyond the code.

Sheet 04

Selected work

Completed client engineering contribution · Contribution completed

ProofMark | Document-signing workflows

Completed client engineering on a signing workflow connecting React interfaces, typed APIs and PostgreSQL records with PDF fields, recipient routing, audit history and webhooks. Kept security-sensitive state and fallback paths explicit across signing and verification, bringing the document, signer and evidence record into one connected product workflow.

Deep dive

ProofMark was client work, and my engineering contribution is complete. I designed a signing workflow spanning identity, document/PDF fields, recipient routing, audit history, verification, encryption, webhooks and embedded signing. The work involved Next.js, React, tRPC, Drizzle, PostgreSQL and Rust. Explicit security-sensitive state and fallback paths connect the interface to the evidence behind an agreement. The result is a contribution to an AGPL/open-source product surface across UI, APIs, data, verification and PDF workflows. The public website introduces the product and its signing process.

ProofMark product website ↗

Owner-built framework and distinct UI toolkit · Early development

Kerf | Compiler and UI architecture

Building Kerf, an early-development TypeScript/TSX framework with its own compiler, full-stack routing, authentication and data architecture, alongside its UI tools. The working preview shows direct page updates and actionable diagnostics for coding agents. The public npm scaffold provides an entry point to the framework; Kerf is a separate runtime from React.

Deep dive

Kerf is my agent-oriented TypeScript/TSX framework with its own compiler and full-stack routing, authentication and data architecture. Its UI tools support the framework. The current preview demonstrates direct page updates and compiler errors that explain a problem and a possible correction to coding agents. The create-kerf package is the public scaffold. I am developing these tools around the practical problem of making UI behavior and compiler feedback easier to work with. Kerf remains in early development; my longstanding React application work is separate experience.

Kerf framework preview ↗

Founder-built product for the technical practice · In development

Technomancy | Client-operations platform

Built a TypeScript/Next.js and PostgreSQL operating layer joining support tickets, companies, contracts, billing and infrastructure context behind tenant-aware services. Built deployment tooling that records image identity, applies migrations and checks service health, plus restore-verification tooling for a disposable database, supporting investigation and ongoing application ownership.

Deep dive

The platform is the client-facing support product and internal operating layer for my own technical practice. TypeScript, Next.js and PostgreSQL connect ticketing, CRM, scheduling, billing, analytics and infrastructure telemetry, so support records can be understood alongside companies, contracts, invoices, devices and service context. Tenant-aware services maintain client and internal access boundaries. Delivery tooling derives image tags from Git, can run project checks, builds a container image, applies SQL migrations, records image identity and checks health and public-host responses. Separate restore-verification tooling checks a backup checksum, restores into a disposable PostgreSQL instance and checks table counts. Together, the tools make deployment state and the contents of a restored backup easier to inspect.

Technomancy platform overview ↗

Sheet 05

Capabilities

  • TypeScript / React / HTML & CSS
  • SQL / PostgreSQL / data modeling
  • API design / third-party integrations
  • AI-assisted workflows / agent tooling
  • Application support / release & recovery