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Curriculum Vitae · 2026 · Gdańsk / Remote
Gustaw Beźnicki

Gustaw Beźnicki

Senior Software Engineer at KMD — building a cloud settlement & billing platform and leading a six-person Polish-Danish team. Seven years in distributed .NET systems. Two ventures on the side: B&B Digital and Lavamme.

gustaw.beznicki@gmail.com linkedin.com/in/gbeznicki Gdańsk · Poland
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01

Highlights

Engineering

Seven years of enterprise .NET — across banking, energy, e-commerce, and logistics.

Current Role

Leads a Polish-Danish team of six engineers at KMD — owns the architecture, coaches the team, and represents them in cross-team and delivery-management discussions.

AI Adoption

Brought AI into the team's daily workflow — shared Copilot instructions, agentic coding workflows, and an in-house agent that drafts High-Level Design documents from rough notes.

Side Ventures

Two ventures alongside the day job: B&B Digital, a productized web service for Polish SMBs (co-founded 2026), and Lavamme, a Shopify-based fashion e-commerce (co-founded 2024).

Leadership Growth

Spent 2024 building the leadership toolkit — certifications in NVC, effective communication, and Polish-Danish team dynamics.

02

Skills

Leadership & Comms
Technical decision-makingMentoring & coaching1-on-1sCross-team coordinationBacklog collaborationAI tooling adoptionNVCPL ↔ DK communication
Backend Engineering
C#.NET (4.5 – 10)ASP.NETEntity FrameworkMediatRDapperCQRSDDDEvent-drivenSOLIDDesign Patterns
Cloud / DevOps
Azure App ServiceAzure FunctionsEvent GridKey VaultDockerHelm ChartsArgoCDGitHub ActionsAzure DevOps Pipelines
Data & Messaging
MS SQLElasticSearchRedisKafkaRabbitMQ
Quality & Observability
Unit & integration testingMSTestNUnitAutoFixtureMoqFakeItEasyOpenTelemetryApp InsightsOpenSearchStructured logging
Frontend & Web
AngularTypeScriptAstroSanity CMSTailwind CSS
AI-Assisted Dev
Claude CodeGitHub CopilotCustom skills & agents
03

Experience

07 / 2025 — PresentNow

Senior Software Engineer & Solution Expert

KMD Poland · Warsaw

Cloud settlement & billing platform automating complex calculation flows for enterprise clients. Six-person engineering team within a wider multi-team setup.

Engineering & Technical Leadership
  • Owns architecture decisions across the team's major epics — weighing technical correctness against business priorities
  • Brought AI tooling into the team's daily workflow: shared Copilot instructions, agentic coding workflows, and an in-house agent that turns rough notes into draft High-Level Design documents
  • Pairs with the Product Owner on feature scoping — turning loose business asks into engineer-ready user stories
  • Still ships code: backend on the platform's critical paths, with growing time spent on Angular/TypeScript microfrontends
People & Team Growth
  • Coaches engineers through everyday collaboration, with focused 1-on-1s when someone needs the dedicated time — across both technical and personal challenges
  • Owns onboarding for new joiners — pair sessions and platform walkthroughs to shorten time-to-contribution
  • Acts as the team's main technical contact across teams and in delivery-management conversations on direction and capacity
Stack: .NET 10 · C# · Azure (App Service, Functions, Event Grid, Key Vault, App Insights) · MSSQL · ElasticSearch · Redis · Kafka · CQRS · DDD · MediatR · Entity Framework · Angular · TypeScript · Docker · Helm · ArgoCD · GitHub Actions · OpenTelemetry · OpenSearch · MSTest · AutoFixture · Moq
02 / 2023 — 06 / 2025

Software Engineer

KMD Poland · Warsaw

Same platform — settlement & billing. 5–7 person SCRUM team.

  • Delivered backend features on the settlement & billing platform
  • Contributed to frontend tasks as the team's frontend capabilities grew
  • Worked closely with three sibling teams to keep cross-service integration and orchestration solid
Stack: .NET/C# · Azure · MSSQL · CQRS · DDD · MediatR · Kafka · Entity Framework · MSTest · AutoFixture · Moq
2026 — Present · Remote

Co-founder & Tech Lead

B&B Digital

Co-founded a software house building productized websites for Polish independent professionals — lawyers, doctors, architects. Designed the white-label template system (Astro + Sanity CMS) that ships per-client deployments fast. Owns tech direction, delivery framework, and client scoping.

Stack: Astro · Sanity CMS · TypeScript · Tailwind CSS · Cloudflare Pages
03 / 2024 — Present · Remote

Co-founder & Tech Lead

Co-founded a fashion e-commerce brand and built the tech side from scratch. Delivered the Shopify storefront with payments, logistics, and customer-experience integrations. Stayed close to the business too — product, brand, pricing, customer journey — picking up commercial ownership alongside engineering.

04 / 2023 — 05 / 2024

Programming Trainer

ISA · Łódź

Taught .NET development alongside a team of trainers — courses, workshops, and one-to-one guidance. Built curriculum materials and ran sessions for students at varying skill levels.

Stack: C# · ASP.NET · .NET Core · Entity Framework · Visual Studio
08 / 2021 — 02 / 2023

Software Engineer

Sii Poland · Łódź

E-commerce SaaS engine — headless architecture, microservices. Led development in a 5-person SCRUM team.

  • Shipped new functionality across the platform
  • Maintained and optimised legacy services
Stack: .NET 6 · Docker · ElasticSearch · ArgoCD · MongoDB · MSSQL · Dapper · RabbitMQ · Azure DevOps
04 / 2020 — 07 / 2021

.NET Developer

BAKK · Łódź

Debt and loan management platform — desktop application + Web API. 5–8 person SCRUM teams.

  • Built key C# modules including an automatic loan disbursement system (Santander Bank integration) and an Invoice OCR Web API
  • Delivered features against functional and technical specs, extended existing systems, and kept documentation current
Stack: ASP.NET MVC · ASP.NET WebApi · .NET Core · .NET 4.5–4.7 · T-SQL · Hangfire · Entity Framework 6/Core · Azure DevOps
01 / 2020 — 03 / 2020

Software Engineer

Unit4 · Wrocław

Web and desktop HR system. 4-person SCRUM team.

Stack: ASP.NET WebApi · .NET Core · .NET 4.5–4.7 · T-SQL · Entity Framework 6/Core · MS-Test
03 / 2019 — 12 / 2019

Software Engineer

Internet Banking and Mobile Banking. 50-person ITIL team, 3–4 person subteams.

  • Delivered development work against system requirements, introduced PowerShell automation tooling, and ran regression and performance testing
Stack: ASP.NET WebApi · .NET 4.5–4.7 · T-SQL · Entity Framework 6 · MS-Test · Java · Android · PowerShell
08 / 2018 — 02 / 2019

Software Engineer

Rossmann SDP · Łódź

Analysed requirements, designed applications, delivered .NET and MS-SQL development, and maintained and supported legacy systems.

Stack: .NET 4.5–4.7 · C# · Visual Basic · T-SQL · DevExpress
04

Education

2020
Bachelor of Engineering · Computer Systems Technical University of Łódź President's stipend for outstanding students (awarded November 2018)
2016
Medical University of Łódź 5 semesters completed
05

Certifications

2026
Claude Code 101
Anthropic
2026
Introduction to Subagents
Anthropic
2024
Effective Communication
Soft Skills
2024
Nonviolent Communication (NVC)
Soft Skills
2024
Communication in Polish-Danish Teams
Soft Skills
2022
Domain-Driven Design & Event Storming
Engineering
2020
Azure Fundamentals
Microsoft
2019
Microservices with Spring Cloud and Docker
Engineering
2018
Programming in C# / 20483
Microsoft
2018
ITA 105 – OOP
Microsoft
06

Languages

PL
Polish
Native
EN
English
Advanced
07

Interests

Psychology · Cooking · Dog behaviour · Running · Strength training · Books & audiobooks