pilecki.me

Jakub Pilecki · Software architect & hands-on CTO

Clear decisions.
Practical plan.
Working product.

I work closely with founders and business teams to understand their goals and shape a practical plan. I turn that plan into sound technical decisions and reliable software that supports the business.

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Based in Warsaw. Working with teams worldwide.

Jakub Pilecki
A technical partner.
From the first decision to production.
20+

years turning ideas
into working software

4000+

U.S. providers on Qualo
across all 50 states

100K+

users on the
Recoveri platform

20

engineers led as CTO
at Advanced Metrics

01 / Selected work

Built with purpose.
Proven in production.

A few examples of the systems I’ve built,
the teams I’ve led, and the problems I’ve solved.

01 Verve / AI assessment & reporting

Complex information.
Clear next steps.

I architected Verve and wrote its core code, including OpenAI-based RAG pipelines that turn surveys and documents into stakeholder reports and practical improvement plans.

Zero to one

As a founder and the CTO, I led product planning, architecture, and core implementation through a live release in six months, as part of a three-engineer team.

6 monthsfrom concept to live product
3 engineersworking as one focused team
OpenAI & RAG.NET & C#PostgreSQLAzure
VerveAI assessment & reporting
Surveys &
assessments
Documents &
source material
Grounded AI pipelineRetrieve · Generate · Evaluate
Clarity you can act onReports & improvement plans
Grounded in your information

Workflow sketch

Behind the delivery

I owned the architecture, core implementation, and engineering delivery. Beyond connecting an AI model, the work included prompt engineering, confidence tests for generated outputs, and task-specific model selection to balance quality and cost.

The result was a live product delivered in six months by a three-person team, helping nonprofit organizations turn assessments into practical action.

QualoHealthcare SaaS
4000+

providers across 50 states.
One shared foundation.

02 Qualo / Healthcare SaaS

A platform built to serve.
A team built to deliver.

I designed the architecture and core services for a healthcare SaaS platform adopted by 4,000+ U.S. providers across 50 states. Later, as CTO, I led 20 engineers and oversaw a migration of 10 million records.

Zero to one

I designed the new platform’s architecture and core services and led engineering delivery through its first launch, then took on broader leadership and modernization.

.NET & C#SQL & NoSQLAzureRabbitMQ
Behind the delivery

I built shared libraries, dynamic forms, OData, messaging, notification, and event services. As Director of Technology and CTO, I connected technical strategy to delivery, managed a $500K budget, and oversaw the migration of five major customers and retirement of three legacy solutions.

The work also involved SOC 2 and HIPAA requirements and participation in audits.

RecoveriVehicle & asset security
1.3M+

registered vehicles.
Built for reliability.

03 Recoveri / Vehicle & asset security

A complete rebuild.
Ready for the real world.

I rebuilt the platform from the Angular frontend through microservices built with .NET & C#, identity, databases, and deployment. The new version shipped in around six months and grew to 100K+ users.

Zero to one

Within an existing business, I rebuilt a new generation of the platform from scratch and delivered it in around six months.

Angular.NET & C#DatabasesDocker
Behind the delivery

I owned architecture and core implementation, including identity and authorization, delivery pipelines, and integrations with Volkswagen, eNatis, and other vendors.

The platform supports 541 client organizations and more than 1.3 million vehicles. The work has included maintaining a 99.9% SLA over seven years.

More experience & career history

Advanced Metrics

From hands-on engineering to technical leadership across the company’s healthcare products.

  1. Jun 2017–Apr 2018

    Freelance Senior Software Engineer

    Built Maxwell’s offline Windows tablet assessments with reconnect sync and a reusable WYSIWYG forms editor; refactored legacy modules and delivered dedicated sync and email/SMS services.

  2. 2020–2023

    Lead Software Development Engineer / Solution Architect

    Designed Qualo’s architecture and core libraries, led Healthy Pathways delivery and frontend coordination, and built reusable dynamic forms, OData, RabbitMQ, notification, and event services.

  3. Jul 2023–Jun 2024

    Director of Technology

    Led a team of 10, overseeing delivery, customer migration, and legacy retirement while continuing architecture and core engineering work.

  4. Jun 2024–Jan 2025

    Chief Technology Officer

    Led 20 engineers and managed a $500K budget; oversaw migration of 10 million records and five major customers, retirement of three legacy solutions, and work on SOC 2/HIPAA requirements and audits.

DoNotCopyA complete SaaS product

As co-founder, I built the frontend, backend, database, and hosting, delivering an MVP in weeks for early validation and customer feedback.

inviPayOnline factoring & invoice financing

Core architecture, public APIs, bank integrations, and PostgreSQL/MongoDB data processing.

Visiting TeachersModernizing a legacy product

A replacement built with .NET & C# and Angular for Microsoft Access workflows, with a flexible plugin architecture.

UniDocIntelligent document intake

OCR, barcodes, layout matching, and algorithms that turn scanned documents into structured data.

DepowayMobile delivery for fintech

Xamarin apps for iOS and Android, connected to banks, financial-rating providers, and payment gateways.

PayoboxCurrency exchange & messaging

A JavaMoney-based currency exchange service and SendGrid/SMSApi.pl messaging integrations, with a shared layer for adding providers.

Vegan HouseConnected rooms & facilities

Raspberry Pi devices with custom PCBs, a central backend, and iOS/Android apps that let guests access rooms and resort facilities.

02 / How I help

Your next idea.
Taken all the way to production.

Bring me in to own a product from zero to one,
solve a difficult problem, or lead the way forward.

01 /

Zero to one · Complete product delivery

One technical partner for the whole build. I can help shape the idea, plan the product, design the architecture, and code the frontend, backend, databases, infrastructure, and deployment—from the first conversation to a working product in production. When broader expertise or more capacity is needed, I can bring people from my professional network into the project.

Planned and built.
From start to finish.
02 /

Architecture & product engineering

From the first technical decisions to the code that matters. I design systems, build core components, connect APIs, and modernize products that have outgrown their foundations.

A clear path from
idea to production.
03 /

Practical AI integration

AI features grounded in your business and your information. RAG pipelines, document-driven reports, output evaluation, and thoughtful model selection—with quality and cost considered from the start.

Useful capabilities.
Measurable value.
04 /

Hands-on technical leadership

An experienced technical partner for roadmaps, architecture, engineering teams, and difficult trade-offs. I can lead the discussion and implement the decision, keeping business priorities close to delivery.

Leadership that stays
close to the work.
05 /

Seasoned senior engineer

Bring me into the code. With more than 20 years of hands-on experience, I build features, untangle difficult bugs, improve performance, and turn unfamiliar codebases into software the team can confidently develop. I can own the difficult implementation or work alongside your engineers, from the first pull request to production.

Experienced hands.
Code that delivers.

A practical way of working

Close to the code.
Clear on the bigger picture.

You get someone who can discuss the roadmap, make the architectural call, and implement the difficult part. I stay involved where it matters.

01 — Understand

Start with the real problem.

The business goal, the people using the system, and the constraints we need to work with.

02 — Decide

Make the trade-offs clear.

A sound technical direction, a realistic scope, and a plan that the team can act on.

03 — Deliver

Build, test, and keep improving.

Working software, honest communication, and decisions informed by what happens in production.

03 / A little about me

An engineer by practice.
A partner by mindset.

Download my CV

I’m Jakub. I’ve spent more than 20 years building software—and taking responsibility for making it work.

My work has taken me from early product teams to CTO roles, across healthcare, fintech, asset security, and AI-powered products. I’m based in Warsaw and work with clients internationally.

I’m at my best where business priorities and technical complexity meet. I can plan and code the complete product from start to finish, or work alongside your existing team. The common thread is ownership: making the decisions, writing the core code, and staying with the problem through delivery.

I use AI assistants where they save time, such as research, prototypes and repetitive code, so your budget goes into the work that needs a senior engineer.

04 / Tools behind the work

Proven tools.
Chosen for the problem.

Engineering.NET & C# · ASP.NET Core · Entity Framework · Java · Spring Boot · TypeScript · Angular · React · Python · GraphQL · REST & OData · Microservices

Data & infrastructurePostgreSQL · SQL Server · MongoDB · Redis · RabbitMQ · Azure · Docker · Kubernetes

Applied AIOpenAI · RAG pipelines · Prompt engineering · Tool calling · Output evaluation & confidence tests · Model selection & cost control · Human-in-the-loop review · Codex, Claude & Copilot

Have something in mind?

Warsaw, Poland / Working worldwide

Let’s make it work.
Together.

Tell me what you’re building, where you are now, and where you need help. We can take it from there.

Start a conversation
hello@pilecki.me

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Ask anything about my work.

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