Open for contract work· Bangkok, Thailand

I buildSaaS platformsthat actually ship.

Denes Feher. Senior Full-Stack Engineer with 15+ years building software at scale. Founded startups, shipped games on Steam, built a platform that got acquired. Now I do the same for you.

Get in touch Resume

TypeScriptGoC++React / AngularKubernetesUnreal Engine 5

Years shipping

Projects delivered

€0.0M

Seed raised at Zeuz

Games on Steam

Unreal Engine 5C++GASReplicationClient PredictionDedicated ServersEOSSteamworksUnityC#VulkanDirectXHLSLGoTypeScriptReactNext.jsAngularVueNode.jsNestJSPythonPHPLaravelRustPostgreSQLMariaDBRedisMongoDBKubernetesDockerTerraformAWSGCPGraphQLgRPCWebSocketsStripeClaude APIMCPReact NativeSwiftKotlinUnreal Engine 5C++GASReplicationClient PredictionDedicated ServersEOSSteamworksUnityC#VulkanDirectXHLSLGoTypeScriptReactNext.jsAngularVueNode.jsNestJSPythonPHPLaravelRustPostgreSQLMariaDBRedisMongoDBKubernetesDockerTerraformAWSGCPGraphQLgRPCWebSocketsStripeClaude APIMCPReact NativeSwiftKotlin

About

Ownership, speed, and range.

Full-stack engineer with 15+ years building web applications, SaaS platforms, game infrastructure, and cloud systems. Founded companies, shipped games on Steam, built platforms that got acquired.

Founder DNA

Founded, funded, and exited.

Zeuz.io
Co-founded, €2.5M raised, acquired by Improbable
Virtual Reality Central
Founded 2016, $340K Széchenyi grant
Antler & Entrepreneur First
Founder in Residence, Singapore

Right now in Bangkok

--:--:--

Hungarian, based in Bangkok, Thailand. Fully remote, async-first. I overlap with US, EU or APAC hours, whichever your team runs on.

AI-native

Claude Code and Cursor in the daily loop. Built MCP servers and LLM features into production SaaS.

18 languages

TypeScriptJavaScriptGoC++C#PythonPHPRustJavaKotlinSwiftRubyLuaPawnGLSLHLSLSQLBash

How I work

→ I learn any stack in days, not weeks
→ MVP in weeks, not months
→ Give me the problem, I'll solve it
→ Lead or IC, I ship either way
→ Async-first, overlap with US, EU or APAC

Since 2008

Self-taught since 2008. Learned by shipping: Source Engine mods, Steam bots, then startups.

US & EU clients, worked on-site in Munich, Singapore, Hong Kong

Stack

Any stack, every layer.

From shader code to Kubernetes manifests. Pick the tool for the job, ship it, and keep it running.

Game Engineering

Unreal Engine 4/5UE C++BlueprintsGameplay Ability SystemCharacter Movement ComponentReplication & RPCsClient PredictionServer ReconciliationRollbackLag CompensationHit RegistrationAnimation BlueprintsState MachinesChaos PhysicsNiagaraMaterials & ShadersLevel StreamingDedicated ServersEpic Online ServicesSteamworks SDKUnitySource EngineSourcePawnOpenVR / SteamVROculus SDKDirectXVulkanOpenGLHLSLGLSLPerforceUnreal InsightsProfiling & Optimization

Multiplayer Infrastructure

Game Server OrchestrationMatchmaking (ELO, regional)Hybrid Cloud Burst ScalingBare-Metal ProvisioningLarge-File Distribution (20-100GB)Rolling DeploymentsFleet ManagementSession ManagementLeaderboardsAnti-Cheat IntegrationKubernetesHelmDockerTerraformAWSGCPNginxHAProxyPrometheusGrafanaRedisPostgreSQLMariaDBgRPCProtobufWebSocketsUDP Netcode

Languages

C++C#GoTypeScriptJavaScriptPythonPHPRustJavaKotlinSwiftRubyLuaPawnSQLBashHLSLGLSLPowerShell

Web & SaaS

ReactNext.jsAngularVue.jsSvelteNestJSNode.jsLaravelRxJSReduxTailwindCSSGraphQLREST API DesignOpenAPI / SwaggerOAuth 2.0JWTWebhooksStripePayPalCustom Payment GatewaysMulti-Currency BillingCarrier API Integrations (UPS, FedEx, DHL, USPS)EDIHIPAA CompliancePDF GenerationSEOi18nRealtime Dashboards

Cloud & DevOps

AWS (EC2, EKS, S3, RDS, Lambda, CloudFront)GCP (GKE, Compute, Cloud Storage)CloudflareKubernetesDockerTerraformCI/CDGitHub ActionsGitLab CINginxLinuxAuto-scalingMonitoring & AlertingZero-Downtime DeploysBackups & DRCost Optimization

AI Engineering

Claude APIOpenAI APIMCP ServersTool Calling / Function CallingAgentsDocument ParsingEmbeddingsRAGPrompt EngineeringLLM EvaluationClaude CodeCursorAI Editor Tooling (UnrealPilot)

Mobile & Desktop

React NativeSwift / iOSKotlin / AndroidXbox App DevelopmentElectronPWA

Data

PostgreSQLMySQLMariaDBRedisMongoDBSQLiteQuery OptimizationSchema DesignMigrationsETL

Creative & Tools

FigmaBlenderPhotoshopAfter EffectsGitPerforceJiraLinearNotion

Featured

Two platforms, built from zero.

One got acquired. The other serves a hundred enterprise clients. Both started as an empty repo and me.

3plguys.com

3PLGuys

Visit site

VP of Engineering. Built the entire platform solo.

Freight logistics SaaS platform serving 100+ enterprise clients. Built from zero to 1M+ monthly visitors. I designed, developed, deployed and marketed the entire product solo.

1M+

Monthly visitors

100+

Enterprise clients

50+

API integrations

99.9%

Uptime SLA

Full SaaS Platform · React + Angular frontend, NestJS backend, MariaDB

Public API · REST API for third-party integrations with full documentation

MCP Server · Claude AI integration for shipment management

AI Features · LLM-powered carrier matching, document parsing, chat support

50+ Carrier APIs · UPS, FedEx, DHL, USPS, LTL carriers, customs brokers

Real-time Tracking · Live shipment updates via webhooks and polling

Warehouse Management · Inventory, pick/pack, receiving, returns

Infrastructure · Kubernetes on AWS, CI/CD, monitoring, auto-scaling

ReactAngularTypeScriptNestJSMariaDBRedisKubernetesAWSDockerClaude APIMCP

www.gamesindustry.biz/improbable-acquires-game-hosting-service-company-zeuz

Zeuz.io

Read about the acquisition

Co-Founder & Lead Engineer. Acquired by Improbable.

Next-generation game server hosting platform. Container-based orchestration for multiplayer games, built in conjunction with G-Portal, Europe's largest game server provider. Scaled from zero to $200K monthly revenue in 3 months. Raised €2.5M seed. Acquired by Improbable in 2020.

€2.5M

Funding raised

$200K

Monthly revenue

3 mo

Time to scale

EXIT

Acquired

Hybrid Cloud Platform · Multi-cloud orchestration across AWS, GCP and bare metal

Container Orchestration · Kubernetes-based game server deployment and scaling

Game SDKs · Node.js, Go, Java, PHP, C++ SDKs plus Unreal and Unity plugins

Matchmaking · Custom matchmaking service with ELO and regional routing

World War 3 · Powered server infrastructure for a AAA multiplayer FPS

Admin Dashboard · Real-time monitoring, server management, analytics

GoTypeScriptReactAngularKubernetesDockerAWSGCPRedisPostgreSQL

Experience

A decade and a half of shipping.

Startups, studios, and SaaS. Usually the first engineer in the room, often the only one.

Nov 2020 - Present

Remote · Los Angeles

Nov 2020 - Present

Remote · Los Angeles

VP of Engineering

3PLGuys

Built the entire freight logistics SaaS single-handedly from scratch. Scaling to 1M+ visitors, 50+ API integrations, 100+ enterprise clients.

TypeScriptAngularNestJSMariaDBKubernetesAWS

Jan 2023 - Present

Remote · Los Angeles

Jan 2023 - Present

Remote · Los Angeles

Head of Engineering

KidneyCare Dialysis

Built HIPAA-compliant healthcare SaaS and mobile apps in 2 months. Staff scheduling, payroll, workflow automation across multiple care centers.

AngularNestJSMariaDBKubernetes

Feb 2022 - Dec 2023

Remote · Washington DC

Feb 2022 - Dec 2023

Remote · Washington DC

Lead Engineer

Bubbadutch Studios

Rescued Golden Tides from cancellation. Rebuilt C++ foundation, implemented GAS with network prediction, ship physics, EOS matchmaking. Trained the team, shipped within the year.

C++GoUnreal Engine 5AWSPerforce

2021 - 2022

Remote

2021 - 2022

Remote

Lead Engineer

Playdome.io

Built a game server hosting platform billed by the hour. 40+ games, 10 global locations, sub-60-second deploys. Customer panel, provisioning, billing, backend.

Next.jsReactTypeScriptGoKubernetesDocker

Dec 2019 - Oct 2020

Singapore

Dec 2019 - Oct 2020

Singapore

Founder in Residence

Antler & Entrepreneur First

Two VC founder programmes back to back. Validated ideas, built technical prototypes for investor pitches, took concepts from ideation to MVP.

Jan 2018 - Oct 2019

Munich, Germany

Jan 2018 - Oct 2019

Munich, Germany

Co-Founder & Lead Engineer

Zeuz.io

Sole developer of a hybrid-cloud game server platform, built with G-Portal. Raised €2.5M seed, powered World War 3, acquired by Improbable.

GoTypeScriptAngularReactC++KubernetesRedis

Jan 2018 - Oct 2019

Munich, Germany

Jan 2018 - Oct 2019

Munich, Germany

Lead Engineer, Platform

G-Portal / Ociris GmbH

Custom payment solutions, customer portal, Xbox app, game engine SDKs and an automated bare-metal provisioning platform for Europe's largest game server host.

LaravelPHPReactNode.jsPython

Aug 2016 - Sep 2017

Hong Kong

Aug 2016 - Sep 2017

Hong Kong

VP of Engineering

Gauss Labs

Led engineering for a VR headset accessories startup. VR applications and hardware integration.

Feb 2016 - Dec 2022

Budapest, Hungary

Feb 2016 - Dec 2022

Budapest, Hungary

Founder

Virtual Reality Central

VR game studio. Shipped VR Retreat on Steam, built AI pattern-recognition and animation tools, 3D Ed-Tech for automotive students. $340K funding.

C++C#UnityUnreal EngineOpenGL

2008 - 2018

Remote

2008 - 2018

Remote

Freelance Developer

100+ projects

SourceMod plugins for TF2, CS:GO and Garry's Mod, Steam trading bots, webshops, ad platforms for game servers, custom web services for large gaming communities.

Projects

More things live on the internet.

A selection of products and platforms I've built or led. Screenshots are of the live sites.

3plguys.com

3PLGuys

VP of Engineering

Freight logistics SaaS built solo from zero. 100+ enterprise clients, 1M+ monthly visitors, 50+ carrier API integrations, public API, MCP server and AI features.

1M+ visitors100+ clients50+ integrationsBuilt solo

AngularReactTypeScriptNestJSMariaDBKubernetesAWSClaude API

kidneycaredialysis.com

KidneyCare

Head of Engineering

HIPAA-compliant healthcare SaaS. Employee scheduling, payroll automation, patient workflow, multi-center admin.

HIPAA compliantBuilt in 2 monthsMulti-center

ReactTypeScriptNestJSMariaDBKubernetes

chartts.com

Chart.ts

Creator

TypeScript charting library. Beautiful charts, zero config, under 15kb gzipped, SVG-first and framework-native.

Zero deps< 15kb gzipped65+ chart typesMIT

TypeScriptSVGReactVueSvelte

playdome.io

Playdome

Lead Engineer

Game server hosting by the hour. 40+ games, 10 global locations, servers deployed in under 60 seconds. Customer panel, provisioning, hourly/daily/monthly billing. Building since 2021.

40+ games10 locations<60s deployHourly billing

Next.jsReactTypeScriptGoKubernetesDocker

raidframe.com