$ whoami

Marko Pađen

Engineer. Architect. Builder.

Software engineer and architect in Berlin, .NET since 2007. Twenty-plus years of large systems: telecom platforms, enterprise finance, sports betting, SaaS. Cloud delivery on Azure and Kubernetes, and teams of up to fifteen developers led. On the side: muxway, your tmux from anywhere, and Mile, an AI agent that answers for me when yours comes asking.

github linkedin toptal talk to my AI

Berlin.NET 19 yrstelecom 11betting & finance 10Azure 6M.Sc. Information Systems

what I do

$ nimbow · enterprise sms                         [prod]

 api ─▶ queue ─▶ routing ─▶ carriers ─▶ dlr
      rabbitmq   rules      42 routes    events

throughput  ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇  2 184 msg/s
queue depth ▇▇                             31
delivered   99.97 %    p95 lookup 11 ms

$ number-lookup · enum
 query ──udp──▶ lb ──▶ [a] [b] [c]   auto-scaled

$ payments · 2022 → now
 chargebee · stripe · multi-tenant release · aks

alerts   prometheus · 0 firing

$ az pipelines run --branch feature/142
  build      ✓  2m 10s
  test       ✓  1 842 passed
  sonar      ✓  quality gate
  env        ▶  pr-142 (disposable, aks)
  release    ·  tenant-a  tenant-b  tenant-c   [track]

$ terraform plan
  +12 ~3 -0    cosmos db · event hubs · aks

$ helm upgrade portal ./chart
  api      3/3 running
  worker   3/3 running
  portal   3/3 running

workflow  scrum · multi-tenant releases · tracking
          published on the visual studio marketplace

coaching portal   video   twilio webrtc
                  pay     stripe connect
                  chat    signalr
                  ui      vue

marketing product admin   blazor server · mediatr
                  jobs    hangfire · provider sync
                  data    ravendb · redis

finance ops       event   azure functions · event hubs
                  data    oracle pl/sql · ssis

car sharing       sec     patterns · tests · upgrades
content saas      api     regulators worldwide

$ git log --oneline | wc -l
a lot

sprint 42 ──────────────────────────────── 15 devs · 2 weeks

  todo        doing        review       done
  ┌─────┐     ┌─────┐      ┌─────┐      ┌─────┐
  │ 231 │     │ 228 │      │ 226 │      │ 220 │
  │ 232 │     │ 229 │      └─────┘      │ 222 │
  └─────┘     │ 230 │                   │ 225 │
              └─────┘                   └─────┘

head of software development   mitto
technology team lead, external roche
lead developer, up to 15 devs  coaching portal
scrum master · qa mentor       psm i

$ git blame -L1,1 release-process.md
2018 marko  "ship every tenant, every sprint"

$ curl marko.padjen.dev/.well-known/agent-card.json
{
  "name": "Mile",
  "url": "https://mile.padjen.dev/a2a",
  "skills": [ "professional-info",
              "scheduling", "project-inquiry" ],
  "authentication": { "schemes": ["bearer"] }
}

your agent > hello Mile. is Marko open to a project?
Mile > Hello. I'm Marko's agent. Tell me what you
       have in mind and I'll pass it on, or ask me
       about his work.

surfaces  telegram · glasses · http · voice
tools     mail · calendar · git · tickets
runs on   my own box, always

Platforms that carry traffic.

Eleven years in telecoms: the Nimbow enterprise SMS portal and the number lookup service at Mitto, a DNS ENUM load balancer, cloud migration, Prometheus; today payments and multi-tenant delivery for a leading telecommunication company. Ten years in sports betting and finance: betting software at IGT, enterprise finance operations at Wegmans. .NET, Redis, RabbitMQ, Elasticsearch, MySQL and MariaDB, AWS and Azure.

Delivery as a product.

CI/CD that teams keep using: a Scrum release workflow with multi-tenant releases and tracking, published on the Visual Studio Marketplace; disposable environments per pull request on AKS; Terraform environments with Cosmos DB and Event Hubs at Roche; gated pipelines with SonarCloud. Azure DevOps, Kubernetes, Docker, Terraform, TeamCity.

Products end to end.

An online coaching portal with Twilio video, Stripe Connect and SignalR chat. A marketing product's Blazor admin portal with a MediatR back end and Hangfire jobs. Event-driven finance services on Azure Functions and Event Hubs at Wegmans. Security hardening of a car-sharing fleet's legacy apps at Communauto. Regulator API integrations for a content SaaS. Front end, back end and the infrastructure under them.

Teams, led by example.

Head of Software Development at Mitto. Technology team lead, external, at Roche. Lead developer of teams of up to fifteen. Scrum master, QA mentor, the person who introduces AOP and then teaches it. Professional Scrum Master I, Elasticsearch Developer I, MCSD.

muxway: your tmux, from anywhere.

Open source, built like a remote shell service because it is one: a hub, a small agent per machine, and clients from the browser to an Android phone, a Wear OS watch, Even Realities G2 glasses and a Java ME phone from 2002. The AI coding agent in a pane tells you when it needs you, and you answer from whichever screen is in your hand. Go, one static binary per role.

github.com/notmarkopadjen/muxway

Mile: an agent your agent can talk to.

My personal AI runs on my own infrastructure, always on, with real tools: mail, calendar, git, tickets. It reaches me on Telegram, on the glasses, over HTTP, and publishes an A2A agent card right here, so another agent can find it, ask about my work and leave a message.

talk to Mile

career

2022 – nowFull-stack developer · leading telecommunication company
Payment integrations with Chargebee and Stripe, multi-tenant CI/CD on Azure DevOps and Kubernetes, front end to DevOps. .NET, Blazor, Redis, RabbitMQ, Elasticsearch, MariaDB, Azure.
2023 – 2024Senior developer, enterprise finance ops · Wegmans
Financial product code and pipelines, event-driven services on Azure Functions and Event Hubs, legacy modernisation. C#, Oracle PL/SQL, SSIS.
2022 – 2023Full-stack developer · marketing product
Server-side Blazor admin portal with a MediatR back end, marketing providers as Hangfire jobs, multi-stage AKS CI/CD with disposable environments. RavenDB, Redis.
2021 – 2022Senior .NET full-stack developer · Communauto
Security patterns in legacy applications, front-end framework upgrades, security testing of web and REST systems. ASP.NET Core, TypeScript, SQL Server.
2020 – 2021Senior back-end developer · leading content SaaS company
API integrations with regulators worldwide, event-based data processing, shared code standards. Azure Service Bus, Azure DevOps, TeamCity, Angular.
2020Senior full-stack developer · Gemini Diversified Services
Angular client and .NET back end, back-office features, gated CI/CD and Azure deployments with SonarCloud.
2019 – 2020Lead developer · online coaching portal
Led the team across front end, back end and DevOps: Twilio WebRTC video, Stripe Connect payments, SignalR chat, Vue, disposable Azure environments.
2019 – 2020.NET / Angular developer · Pantheon Software, Most Investments
ASP.NET Core REST API with Entity Framework Core, Angular front end, JMeter and Jasmine/Karma testing, Docker, AWS.
2019Technology team lead, external · Roche
Led an Angular and .NET Core project: REST API, a custom control, CI/CD, Terraform environments with Cosmos DB and Event Hubs.
2018 – 2019Head of software development · Mitto
Technical lead of the department, CI/CD and the multi-tenant release process, a DNS ENUM load balancer, Prometheus. AWS, RabbitMQ, Redis, Elasticsearch, MySQL, .NET Core.
2015 – 2018Senior software engineer · Mitto
Nimbow, the enterprise SMS portal; technology lead on the number lookup service; migration to the cloud; aspect-oriented programming with PostSharp.
2012 – 2015Senior software developer · IGT
Sports betting software: WPF, ASP.NET, Oracle Coherence and Oracle Database, tools for POS devices; mentoring on WPF and PostSharp.
2011 – 2012Software developer · IT Excellence
Kendo UI application for Excel import and OLAP cube creation, MDX, WCF, Silverlight; a web and Windows Phone social app.
2011 – 2012Software developer · Best Solution Team
Custom ASP.NET controls, Microsoft Office plugins, portal integrations. Entity Framework, SQL Server.
2010 – 2011Software developer · LMG Group
A configurable white-label site for selling mobile content, integrated with mobile carriers. ASP.NET, SQL Server.
2007 – 2010Software engineer · PR Padjen
A custom TCP/IP protocol for a distributed ERP, ERP data imports, a licensing system. ASP.NET, Silverlight, VB.NET, Access, SQL Server.

The full listing with references is on Toptal; the same on LinkedIn.

background

Since 2007

B.Sc. and M.Sc. in Information Systems and Technologies, Faculty of Organizational Sciences, University of Belgrade. Shipping since the second year.

Every hat

Software engineer and architect, technology lead, full-stack developer, scrum master, QA mentor, DevOps engineer. Usually several at once.

At scale

More than a decade of large systems: architecture, design, coding, testing, documentation, build and release. Certified: PSM I, Elasticsearch Developer I, MCSD, MCP.

Now

Berlin. Commercial work, mostly remote, and AI-native infrastructure on the side: always-on agents, multi-model orchestration, agents talking to agents.

stack

Languages & frameworks

C#.NET / .NET CoreASP.NET CoreBlazorEntity FrameworkWPFTypeScriptAngularVueSQLGoPythonJavaKotlin

Cloud & delivery

AzureAWSKubernetesAKSDockerTerraformAzure DevOpsTeamCitySonarCloudPrometheusCaddysystemd

Data & storage

SQL ServerMySQL / MariaDBPostgreSQLOracleRedisElasticsearchRavenDBCosmos DBOracle Coherence

Messaging & integrations

RabbitMQAzure Service BusEvent HubsAzure FunctionsSignalRHangfireMediatRStripeChargebeeTwilioREST

AI & agents

Claude CodeAgent hooksMCP serversA2A protocolAgent orchestrationLLM shimsMulti-surface AIFastAPIMicrosoft Graph

Practice

MicroservicesClean architectureAOPTest automationJMeterPlaywrightScrumMulti-tenant releaseWeb security

open source & writing

muxwayyour tmux, from anywhere: a hub, a host agent and clients from phone to glasses; android, glasses and java me clients in their own repositoriesGo · TypeScript · Kotlin · Java
imperfect-dollopdistributed in-memory cache for .NET CoreC#
dot-net-aspects-postsharpcommon aspects implemented with PostSharp; the companion to Caching and Connection Handling in .NET: an Aspect-Oriented Programming Tutorial on the Toptal Engineering BlogC#
Azure DevOps workflowa Scrum workflow with multi-tenant releases and release tracking, built at Mitto, published on the Visual Studio Marketplaceextension
Redis Insightsopen-source tool for analysing key distribution in Redis, built at MittoC#

your AI can talk to my AI

Mile knows my background, my projects and my calendar. If you are an agent, fetch the card and open a conversation over A2A. If you are a human, just say hello.

agent card https://marko.padjen.dev/.well-known/agent-card.json

a2a https://mile.padjen.dev/a2a (bearer; ask for a key)

human t.me/mile33bot · p@djen.email

view agent card message on telegram

questions

Can I hire you?

A private mail to p@djen.email or an instant message is best. Mile can tell you about my availability and pass a message on when I am away.

What kind of work?

Back end and full stack on .NET, the cloud and delivery around it on Azure, AWS and Kubernetes, and the lead role when a team needs one. Telecoms, finance, betting and SaaS so far; the domain matters less than the scale.

Is muxway something I can use today?

Young, and used daily by its author. The hub, the agent, the protocol, the web client, hooks for Claude Code, Codex, Gemini CLI and the others, the inbox, a command-line client and an MCP server are in. Expect the protocol to grow, not to break. Start at the repository.

What does an agent get from the agent card?

Mile's A2A card lists three skills: my professional background, scheduling across time zones, and project inquiries it relays to me. The endpoint takes a bearer token; ask for one.