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Miloš Živković
Software & Cloud Engineerfounder & owner, ProtoCode
I work on secure, compliant and scalable systems, with twelve years of experience in software and cloud engineering. Today I work with SaaS companies, startups and enterprise clients that need scale and compliance.
- role
- Software & Cloud Engineer
- based in
- Zrenjanin, Serbia · remote only, mostly with international clients and open to clients anywhere
- company
- Founder and owner of ProtoCode, since January 2021
- experience
- 12 years
- works across
- Cloud infrastructure, platform engineering, DevOps, distributed systems, TypeScript, Node.js, AWS and AI implementation
- how I build
- Agents first, with tests, CI and my review on every change
- works with
- SaaS companies, startups and enterprise clients
span 07.1 capabilities four areas · twelve capabilities
What I work on
Most systems need all three areas at once: software that is built well, infrastructure that runs it at a sensible cost, and the security and compliance work around both. The fourth area is how I build all of it.
Software
Node.js & TypeScriptBack-end development in Node.js and TypeScript.
AI implementationSoftware that uses AI services such as OpenAI, ElevenLabs and Deepgram.
DatabasesServerless and non-serverless: DynamoDB, MongoDB, DocumentDB, PostgreSQL, MySQL.
Cloud
Cloud architectureOn AWS or other cloud providers.
DevOps & CI/CDFully automated CI/CD; infrastructure as code with Terraform.
Cost optimisationCloud cost optimisation, including a 58% cut in monthly infrastructure costs for a SaaS platform.
Security
DevSecOpsSecure infrastructure and platforms, with vulnerability management.
Compliance readinessGetting platforms ready for an ISO/IEC 27001 or SOC 2 audit. Readiness, not audit or certification.
Reliability & recoveryReliability and disaster recovery, including regular recovery tests.
Agents-first
Context before codeArchitecture, conventions and context files come before the code.
Parallel agentsSeveral agents at once, each on a separate, well-scoped task.
Tests, CI & reviewAgent-written code passes tests, type checks, linters and CI, and I review every change.
span 07.2 engineering log newest first
Engineering log
Period, role, organisation, what I was responsible for, and the system it ran in.
Jan 2021 – nowFounder & ownerProtoCodeSoftware development, cloud architecture, server administration, DevOps and security for client companies.Studio for startups, SaaS platforms and enterprises
2022 – nowTechnical LeadSaaS platformBack-end development in Node.js, DevOps, cloud engineering and architecture, compliance readiness. Led the security initiatives and the DevOps, DevSecOps and integration projects.SaaS product for marketers · AWS, Terraform, microservices · through ProtoCode
2022 – 2023Full Stack DeveloperClient projectBuilt a business jet charter platform end to end: front-end, back-end, cloud architecture and database.PHP, Laravel, Node.js · Hetzner Cloud · PostgreSQL with PostGIS · through ProtoCode
Aug 2019 – 2022Back-end DeveloperThe same SaaS platformBack-end development and DevOps.Node.js, TypeScript, microservices, AWS, CI/CD · freelance, then through ProtoCode from 2021
Before 2019Full Stack DeveloperFreelanceFull stack development on various freelance projects.PHP, JavaScript, Laravel, React, Vue
open spanCurrent entries keep a line running off the page: the work is ongoing.
span 07.3 engineering perspective five principles
How I think about systems
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Infrastructure decisions have business consequences.
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Reliability requires explicit failure assumptions.
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Security belongs in architecture and process, not in documentation alone.
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Compliance controls should map to real systems and responsibilities.
span 07.4 method agents first · engineering around them
How I build: agents first
Before an agent writes any code, I define the system it works in: the architecture, the conventions, the boundaries and the context it needs. The goal is a codebase an agent can understand before a person has to read it.
- Context firstarchitecture, conventions, context files
- Parallel agentsseparate, well-scoped tasks
- Tests & CItests, type checks, linters
- My reviewevery change
- Shipped
That is how I ship much faster than a conventional workflow. The speed comes from the engineering around the agents, not from skipping it: nothing an agent writes reaches production until it has passed the tests and CI and I have reviewed it.
span 07.5 bridge engineering → compliance readiness
Compliance readiness as engineering work
A compliance control eventually has to exist in an architecture, an infrastructure and an operating process. That is why I treat compliance readiness as engineering work.
On the SaaS platform where I am Technical Lead, I am taking the platform through readiness aligned with ISO/IEC 27001: security policies, system and architecture documentation, and the technical controls in AWS and the back-end services.readiness, not audit or certification
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Miloš and ProtoCode
Related, not interchangeable. This site is about me; ProtoCode is the studio through which all my client work runs.
Miloš Živković
Software & Cloud Engineer
- role
- Founder and owner
- offers
- Development, architecture and implementation; consultancy for teams that need to implement AI or get ready for a compliance audit
- this site
- Who I am and what I can do
Founderthe connection
ProtoCode
Studio · services and projects
- what it is
- A studio providing software development, cloud architecture, DevOps, DevSecOps, compliance readiness, FinOps and AI implementation, usually for startups, SaaS platforms and enterprises
- client work
- All of it is contracted and invoiced through ProtoCode
- team
- Miloš, with sub-contractors when a project needs them
- website
- protocode.rs ↗
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Where to verify
Each line points to something you can check. No badges, no logos.
signalvaluehow to verify
RolesFounder of ProtoCode; Technical Lead for a SaaS platform; earlier client and freelance workEngineering log; LinkedIn profile ↗
Compliance experienceISO/IEC 27001 readiness for a SaaS platform, 2026 (ongoing)Ask by email; case study on protocode.rs, once published
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Get in touch
Work with meProjects and services go through ProtoCode · protocode.rs
Write to memilos@protocode.rs
Find me on LinkedInlinkedin.com/in/milos-zivkovic