HRISTIJAN
MIJALKOV

Full-stack & AI Engineer

About

Who I am

Full-stack and AI engineer with 4+ years of production experience across banking, SaaS, ERP integration, CMS and AI — shipping a banking platform used by multiple client banks and on-prem AI tooling for an SAP environment, alongside freelance web development, volunteer disaster-relief tooling and a few products of my own.

At Vista Point I build and maintain a multi-tenant banking platform with Angular frontends, NestJS and Node.js services, and MySQL, MongoDB and Redis behind them, covering KYC workflows, wire transfers, webhooks and OAuth 2.0 security. At Xient GmbH I connected an on-premise SAP system to a local LLM, built Copilot Studio agents for purchasing and finance staff, and shipped a Teams dashboard, a documentation export tool and a RAG assistant. I also founded Redproof, security checks for apps built with AI coding tools (live at redproof.dev), ColdLatch, cold-chain monitoring that blocks affected batches in SAP (NestJS, Angular, MySQL, live at coldlatch.com), and DAWN, a bilingual teaching platform with its own CMS (Go, Angular, PostgreSQL), and I'm building Close, a financial close engine.

Comfortable with microservices, multi-tenant SaaS and event-driven design. Strongest in Angular, Node.js, TypeScript, Go and Python (FastAPI), on AWS with Terraform. Drawn to products where careful data handling matters: banking, ERP and AI that keeps company data private.

English

C1 · German A2

Based

North Macedonia

AngularNestJSTypeScriptPythonPySparkApache SparkApache FlinkKafkascikit-learnDeep LearningDockerKubernetesAWSCI/CDMySQLRedisREST APIsNode.jsPostgreSQLMongoDBC/C++JavaLinuxMLOpsData MiningETLBioinformaticsStatisticsAngularNestJSTypeScriptPythonPySparkApache SparkApache FlinkKafkascikit-learnDeep LearningDockerKubernetesAWSCI/CDMySQLRedisREST APIsNode.jsPostgreSQLMongoDBC/C++JavaLinuxMLOpsData MiningETLBioinformaticsStatistics
AngularNestJSTypeScriptPythonPySparkApache SparkApache FlinkKafkascikit-learnDeep LearningDockerKubernetesAWSCI/CDMySQLRedisREST APIsNode.jsPostgreSQLMongoDBC/C++JavaLinuxMLOpsData MiningETLBioinformaticsStatisticsAngularNestJSTypeScriptPythonPySparkApache SparkApache FlinkKafkascikit-learnDeep LearningDockerKubernetesAWSCI/CDMySQLRedisREST APIsNode.jsPostgreSQLMongoDBC/C++JavaLinuxMLOpsData MiningETLBioinformaticsStatistics

Experience

Where I've worked

Redproof

Founder

North Macedonia (Remote)

Oct 2026 – Present
  • Founded and built Redproof (redproof.dev), launch and security checks for apps built with AI coding tools such as Lovable, Bolt and Cursor. Paste a GitHub repo and get a free launch score in about a minute, with a fix prompt for every finding.
  • Built the scan engine: 44 checks that read code without running it, including a table-by-table map of who can read and change data under Supabase row level security. Sandboxed, with size and zip-bomb limits.
  • Added an AI review with the Claude API (cached prompt passes plus a verifier pass) on paid scans, at about $0.25 per review in testing, with daily and monthly budget caps.
  • Measured quality on 34 hand-labelled public repositories and a golden test suite, raising rule precision from 71% to 95%.
  • Runs on AWS with Docker, Caddy and Terraform: Angular SSR with prerendered SEO pages, payment webhooks, email through Amazon SES and a strict Content Security Policy.
NestJSAngularMySQLClaude APISupabaseAWSDockerTerraform

ColdLatch

Founder

North Macedonia (Remote)

2026 – Present
  • Founded and built ColdLatch (coldlatch.com), cold-chain monitoring software for pharma and food distributors. It turns a confirmed temperature excursion into a signed batch block in the ERP, with a tamper-evident audit log.
  • Designed and built the multi-tenant web application: NestJS backend, Angular 21 portal, MySQL, and MQTT and HTTPS intake for temperature loggers.
  • Built the SAP S/4HANA integration on SAP's standard OData services (stock lookup and material documents), and checked the read path against SAP's own sandbox system.
  • Implemented signed decisions (password and reason), a hash-chained audit log, PDF excursion reports, and notifications by email, Slack, Teams and webhooks.
  • Runs in production on AWS with Docker and Terraform, with a public live demo and about 1,200 automated tests across the backend and portal. Available in five languages, with a public integration API for other ERP systems.
NestJSAngularMySQLMQTTSAP S/4HANAODataAWSDockerTerraform

DAWN

Founder

North Macedonia (Remote)

Jul 2026 – Present
  • Founded and solo-built DAWN, a bilingual (EN/MK) teaching platform for coding and economics, from system design through deployment, including the Terraform-managed infrastructure.
  • Built a Go REST backend on a Postgres-backed schema paired with an Angular SSR/SSG frontend, optimizing public content for SEO and fast first-load performance.
  • Own the full product as sole engineer: architecture, content model, and infrastructure as code. Has delivered lessons to 30+ students.
GoAngularPostgreSQLTerraformSSR/SSG

Vista Point

Senior Full Stack Engineer

North Macedonia

May 2022 – Present
  • Built and maintained, together with the founder, a multi-tenant banking platform used by multiple client banks, covering identity verification, cross-border wire transfers, and FX trading.
  • Built KYC and wire-transfer workflows: profile approvals, document management, bulk uploads, and configurable cut-off times by time zone.
  • Designed webhook events for KYC status changes, signed with HMAC, and documented the public API with OpenAPI.
  • Hardened security with OAuth 2.0 (user login, service-to-service and bank-client access), two-factor authentication, JWT and refresh-token rotation.
  • Migrated client websites from Adobe Experience Manager to Contentful with .NET: content import, APIs, page rendering, authentication, and hosting on Azure.
  • Fixed a peak-load performance bottleneck with Redis read-through caching and rewritten MySQL queries.
  • Built features on the company website (Angular SSR): a planning calendar, email workers and EN/MK translations. Mentored interns.
AngularNestJSNode.js.NETContentfulAzureMySQLMongoDBRedisJWTOAuth 2.0Docker

Xient GmbH

Backend and AI Engineer

Germany (Remote)

Jun 2024 – Sep 2026
  • Shipped a Microsoft Teams tab application (FastAPI, Python) embedding a BW/4HANA KPI dashboard as both a personal and channel tab, surfacing real-time business intelligence data directly within Teams.
  • Delivered a full-stack documentation PDF export tool (Go, React, Next.js, Python, Playwright) with BFS site crawling, per-section ZIP packaging, and SSE-streamed generation progress.
  • Wired an on-premise SAP S/4HANA + BW system to a locally-hosted LLM (Ollama on Nvidia DGX Spark) via RFC/BAPI and OData; built Python extraction pipelines enabling zero-cloud AI-powered data analysis.
  • Built Microsoft Copilot Studio agents backed by Power Automate flows that query the on-premise SAP system (OData through a data gateway, read-only), so purchasing and finance staff can ask plain-language questions about contracts, account balances, and production orders.
  • Built a multi-format (docx/xlsx/pdf) RAG pipeline with a tool-calling agent loop combining document retrieval and live SAP queries; evaluated a knowledge-graph RAG approach against a ChromaDB baseline and shipped a from-scratch cross-encoder reranker to close a retrieval-quality gap, entirely on-prem via local Ollama models.
FastAPIPythonGoAWSReactNext.jsSAPCopilot StudioTerraform

Support Kocani

Volunteer Developer

North Macedonia

Mar 2025 – Apr 2025
  • Designed and launched a donation-tracking website in 72 hours during a local disaster, so families could track relief donations in real time.
  • Used AI to auto-read bank transfer screenshots, cutting manual data entry by about 4 hours a day.
PHPLaravelAWSOpenAI Vision API

Freelance

Full Stack Engineer & Tutor

North Macedonia

Sep 2021 – Present
  • Delivered 2 production websites end-to-end (solar energy provider, PVC construction company) covering requirements, UI/UX, full-stack development (HTML, CSS, JavaScript, PHP), and deployment, enabling clients with no prior web presence to generate online leads.
  • Taught web development (Angular, Node.js, HTML/CSS/JS) and data science (Python, Pandas, SQL, ML, Deep Learning, LLMs, RAG systems) across 1-on-1 and small-group sessions, adapting curriculum to individual skill levels.
  • Building Close independently, a month-end financial close engine for course and membership businesses (Python, FastAPI).
AngularNode.jsPythonFastAPIPHPSQL

Loka & nf-core Bioinformatics Hackathon

Open-source Contributor

North Macedonia

Mar 2026
  • Contributed code improvements, bug fixes, and documentation to nf-core Nextflow pipeline modules at an international hackathon, collaborating with researchers on reproducible bioinformatics workflows.
Pythonnf-coreNextflowBioinformatics

Projects

Things I've built

28 / 28
01
Redproof

Launch and security checks for apps built with AI tools like Lovable, Bolt and Cursor. Reads the code without running it (44 checks, including a Supabase row level security access map), adds a Claude-based AI review on paid scans, and explains every finding in plain words with a fix prompt. Live, with a free score.

02
ColdLatch

Cold-chain monitoring for pharma and food distributors. Turns a confirmed temperature excursion into a signed batch block in the ERP, with a hash-chained audit log, PDF excursion reports and alerts. SAP S/4HANA integration on standard OData services. Multi-tenant, in production on AWS, with a public live demo.

03
Serverless Observability Stack

Serverless items API (API Gateway to Lambda to DynamoDB) with a full observability layer on top: a CloudWatch dashboard, percentage-based metric-math alarms, and SNS email alerting.

04
AWS VPC Foundation

Reusable, secure-by-default multi-AZ VPC Terraform module for AWS with private subnets that have no route to the internet, plus a minimal EC2 instance proving it works.

05
Terraform CI/CD Pipeline

GitHub Actions pipeline for Terraform: every PR gets a plan, format check, and security scan; merging to main auto-deploys dev and requires human approval before touching prod, authenticating via separate OIDC roles instead of long-lived keys.

06
SAP LLM Connector

Scripts that pull data out of an on-premise SAP system (S/4HANA and/or BW-on-HANA) and hand a pandas-summarized version to a local Ollama LLM for analysis, so no SAP data ever leaves the network.

Skills

What I work with

Languages

PythonGoTypeScriptJavaScriptJavaC#C/C++SQLPHPBash/ShellHCL

Web & APIs

Spring BootAngularRxJSNestJSNode.js.NETFastAPIFlaskHTMLCSSAccessibility (WCAG)Tailwind CSSREST APIsOpenAPIWebSocketsNginxSEO

Databases

MySQLPostgreSQLMongoDBRedisAWS RDSAWS Aurora

Data & ML

PySparkApache SparkApache FlinkKafkascikit-learnPandasMatplotlibSeabornDeep LearningLLMsRAGData MiningETLMLOpsDatabricksStatisticsData VisualizationBioinformatics

Cloud & DevOps

AWS (S3, EC2, IAM, CloudFront, Lambda, ELB)TerraformDockerKubernetesCI/CDJenkinsGitGitHubLinux/UnixSSH

Architecture

MicroservicesMulti-Tenant SaaSEvent-DrivenMVCREST APIsETL PipelinesLambda ArchitectureHexagonal/Clean Architecture

Tools

SAPHypatosGitHubClickUpPostmanJiraConfluenceGitLabBitbucketOpenAI APIContentful

Education

Academic background

B.Sc. Software Engineering & Information Systems

Faculty of Computer Science and Engineering (FINKI), UKIM

Skopje, North Macedonia

Graduated

Key coursework

Algorithms & Data Structures

Complexity analysis, trees, graphs, dynamic programming, sorting and search algorithms.

Operating Systems

Process and memory management, scheduling, file systems, concurrency and synchronisation.

Computer Networks

TCP/IP stack, routing protocols, socket programming, and network security fundamentals.

Databases

Relational modelling, SQL, query optimisation, transactions, and NoSQL fundamentals.

Software Engineering

SDLC, agile methodologies, requirements engineering, testing, and design patterns.

Artificial Intelligence

Search algorithms, knowledge representation, logic programming, and planning.

Machine Learning

Supervised and unsupervised learning, model evaluation, feature engineering, neural networks.

Data Mining

Association rules, clustering, classification, and pattern recognition in large datasets.

Big Data Mining

Distributed processing with Apache Spark, Flink, and Kafka, batch and streaming pipelines at scale.

DevOps Software Development

CI/CD pipelines, infrastructure as code, containerisation, automated testing, and release management.

Information Security

Cryptography, access control, network security, threat modelling, and compliance.

Statistics & Probability

Statistical inference, probability theory, hypothesis testing, and regression analysis.

Web Programming

Client-server architecture, REST APIs, JavaScript frameworks, and authentication.

Bioinformatics

Biological sequence analysis, genomic data pipelines, and computational biology tools.

Computer Architecture

CPU design, instruction sets, memory hierarchy, pipelining, and parallel processing.

Languages

Macedonian (Native) · English (C1) · German (A2)

hristijanmijalkov2@gmail.com© 2026 Hristijan Mijalkov