Sine Cera.
G GEORGI GEORGIEV  ·  EST. 2012  ·  VARNA, BG

Georgi Georgiev

Software architect, consultant, builder of useful things.

Writing production software since 2012. The last few years spent making other people's software faster, more correct, more maintainable, and — recently — built largely with AI as a co-pilot rather than from scratch by hand.

§ 01 · ABOUT

Georgi Georgiev. Based in Varna, Bulgaria. Working remotely across the EU and US.

Currently CTO at Devista — a 30-person Romanian software-consulting company — and operating Sine Cera Ltd. (Bulgarian EOOD) as the entity for direct independent engagements.

Languages
English, Bulgarian, Spanish, Italian.
Certified
AWS Solutions Architect.
Earlier
Java/Spring + AWS at Tarya Fintech (loan-management module for a major Israeli bank, 2022). Critical national internet infrastructure, 2012 – 2022. University web-development semester (post-graduation, returning to teach).
Mentorship
Mentored or managed 20+ engineers across the disciplines I work with (backend, frontend, DevOps, team-lead transitions, business analysis). Authored and delivered Practical RAG, a multi-session course for Devista's technical staff (Dec 2024 – Jan 2025).
§ 02 · HOW I WORK

A few principles that show up in everything I touch.

Documentation as a deliverable, not an afterthought.

Every project I've owned ships with structured in-tree documentation — feature reference, architectural decision records, runtime fix playbooks, onboarding guides. The discipline was forged early in my career at a place where documentation was a primary deliverable — every function had both a prose specification and a literal flowchart. AI-augmented development has collapsed the cost of producing rigorous documentation, so the bar for "is it worth documenting?" has dropped — and I'm well-positioned to leverage that.

AI-augmented since December 2025.

I haven't manually written a line of code in months. Productivity has gone up dramatically. The shift reshapes everything — what gets done, how code is reviewed, what's worth automating, how knowledge is captured. I make every architectural decision personally; AI handles the implementation, the boilerplate, the test scaffolding, the documentation first-draft. The thinking stays mine.

Honest scope, honest seats.

Not every engagement needs an architect. Some need a senior IC who can walk into a complex codebase and ship the right fix; others need someone to take a product from concept to production; others need just a senior infra hand who keeps the deployment topology sane. Recognizing the right shape — and not over-extending into someone else's territory — is part of the practice.

Open by default.

Personal tools are MIT. Consulting work runs on the same principles where commercially possible — open-source contributions back, vendor-neutral architecture, no lock-in for the sake of lock-in. The Sine Cera brand is "without wax" because the goal is software that works honestly, not software that hides where it's flawed.

§ 03 · SELECTED WORK

A representative slice.

Some clients named publicly, others kept anonymous out of professional courtesy. Concrete detail preserved either way.

2025 — present
Architect & Team Lead
Brokerage industry

An AI-driven course-builder SaaS (active)

Architect and Team Lead on a NestJS + React + AI-services platform for the brokerage industry. Document-ingestion pipeline through to vector embeddings, RAG chatbot with source citation, LLM-driven course generation with quizzes, Romanian text-to-speech for voice content. Provider-abstracted AI services layer designed for the model market's volatility. Multi-tenant row-level security via Prisma + CASL. AWS Cognito + Fargate + Qdrant + Redis. Most AI-dense commercial engagement to date.

NestJSReactTypeScriptPostgreSQLQdrantAWS FargateGemini AI
2025 — present
Senior Consultant
Global tire manufacturer

A major global tire manufacturer

Senior consultant on the European B2B platform — a SAP Commerce + Spartacus storefront serving tire retailers across Europe. Concentrated on the highest-traffic surfaces: the Product Listing Page in 2025, the Product Detail Page currently. Around the page-level work, owned several architectural pieces — Redis-based cross-pod caching design replacing pod-local Ehcache (cache hit rate moving from ~3.9% to projected >80%, eliminating a 7–10 second page-load penalty) and an async order-replication architecture proposal.

SAP CommerceSpartacusJavaSpringRedis
2024 — present
Sr. SAP Commerce Consultant
US golf-equipment retailer

A major US golf-equipment retailer

Ongoing engagement since early 2024 with ~400 commits across two parallel platform streams (Infor M3 ERP and SAP S/4HANA ERP). Owned the JDK 17 → JDK 21 platform migration — 36 distinct runtime fix patterns documented as a replay playbook. Built the Commerce-DB integration extension (pre/post-persist hooks plus 12+ configuration patches exposing Hybris data through SAP's Cloud Integration framework). Replaced the address-validation integration end-to-end. Authored the Spartacus migration analysis covering ~58 storefront pages.

SAP CommerceJavaSpringSAP S/4HANASAP CPISpartacus
2023 — 2024
Architect & Team Lead
Devista

A Romanian public-procurement marketplace

Architect and Team Lead on a Devista delivery — Java/Spring backend with full xlf-locale-per-bundle Angular frontend, AWS-deployed with MFA-gated infrastructure scripts and SSM-only operational access. Domain built around the EU Common Procurement Vocabulary classification system, RFQ workflow, subscription tiers, and Romanian payment-processor integration.

JavaSpringAngularPostgreSQLAWSTerraform
2023 — 2024
Originator & Architect
Devista (internal)

Nova M4 — Management RPG

Originator and architect of a Devista-internal multi-tenant SaaS reframing workplace gamification as a real RPG: experience events, configurable level-up strategies, missions with objectives, peer recognitions, leaderboards, configurable challenges. Three repos (Spring on AWS Lambda + SAM, Ionic+Capacitor mobile, Tagus-Angular admin), per-tenant Cognito user pool isolation. Functional end-to-end; abandoned commercially when the market signal didn't justify continued investment. Counted here for what it shows about full-cycle product capability — concept through architecture through team direction through honest decision to stop.

JavaSpringAWS LambdaIonicAngularCapacitorAWS Cognito
2023
SAP Commerce IC
Romanian luxury retailer

A Romanian luxury fragrance retailer

Six-month engagement delivering the first SAP Commerce Cloud + Spartacus implementation of a multi-brand luxury retailer. Sole implementer of the payment-integration extension end-to-end — built from scratch and maintained through the engagement, handling card flows, retry semantics, structured error-code mapping, and currency restrictions enforced at order creation rather than at payment time. Concentrated work on order lifecycle, returns, promotions, vouchers, and gift-card edge cases across five integrated systems (Hybris, NAV ERP, WMS, Salesforce, the payment processor).

SAP CommerceSpartacusJavaSpringMS Dynamics NAVSalesforce
2022
Team Lead, Java/Spring
Tarya Fintech

A major Israeli bank — loan management module

Eight months at Tarya Fintech delivering loan management for a major Israeli bank. Promoted from Java/Spring developer to Team Lead in five months. Owned two microservices in the loan-management module — loan creation and payment-schedule calculation against contract parameters — plus the AWS integration of the application end-to-end. The career-pivot engagement: bridge between a decade of legacy stack and the modern Java + Spring + Kubernetes + AWS world that defines every engagement since. Foundation for the AWS Solutions Architect certification.

JavaSpring BootKubernetesAWSPostgreSQL
2012 — 2022
Senior Engineer
Critical infrastructure

Critical national internet infrastructure

A decade at the company operating one of Bulgaria's foundational public internet services. Owned the payment-processing subsystem end-to-end — multiple payment types including card, cash-fiscal, and automated bank transfer. Owned the domain lifecycle engine, which managed hundreds of states with complex conditional transitions. Six-engineer team responsible for the full platform stack, with documentation as a primary deliverable alongside code. The foundation for everything since.

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