Remote Backend Developer jobs open to Bulgaria.

Unreal Engine, C++, Streaming solutions, Memory system, Physics (ChaosPhysics), World building tools, AAA title experience, Multithreaded programming, System architecture, Debugging and optimization

CD PROJEKT REDCD PROJEKT RED is a Warsaw-based video game developer specializing in story-driven RPGs, including The Witcher series and Cyberpunk 2077, operating primarily in the B2C gaming industry with a global target market.

Unreal Engine, C++, Streaming solutions, Memory system, Physics (ChaosPhysics), World building tools, Multithreaded programming, System architecture, Debugging and optimization

CD PROJEKT REDCD PROJEKT RED is a Warsaw-based video game developer specializing in story-driven RPGs, including The Witcher series and Cyberpunk 2077, operating primarily in the B2C gaming industry with a global target market.

RTL design, CPU architecture, Microarchitecture development, Power-saving techniques, High-speed processor design, Design verification, Synthesis and timing closure, Problem-solving skills

Rust

3 years of experience, Rust, Network services, Asynchronous code, Security-first mindset, Distributed systems, RPC protocols, Kafka, Event-Driven Systems, End-to-end ownership, Mentorship

KrakenKraken is a global fintech B2B and B2C cryptocurrency exchange platform, dedicated to accelerating crypto adoption and headquartered remotely with a presence in over 70 countries.

3 years of experience, Full-stack or backend proficiency, Custom integrations experience, Technical implementation ownership, Technical discovery sessions, C1+ English proficiency

PearlPearl is a dental AI company specializing in SaaS solutions for dental x-ray analysis, headquartered in an unspecified location, operating in the B2B healthtech industry with a global market presence.

TypeScript · React · Node.js

5 years of experience, React, TypeScript, Node.js, REST, GraphQL, MongoDB, CI/CD, iPaaS, AI coding tools, Healthcare integrations, Security awareness

AWS · Kubernetes

8 years of experience, Go, Trust Accounting, Financial systems, AWS, Kubernetes, CI/CD, Cross-team influence, Backend architecture, Production-grade services

HostawayHostaway is a USA-based B2B SaaS provider specializing in vacation rental management software, serving property managers with 2-5,000+ properties globally.

Go · AWS · Kubernetes

8 years of experience, Trust Accounting subsystem, Production-grade financial infrastructure, AWS, Kubernetes, CI/CD pipelines, Golang, Financial systems familiarity, Architectural design, Cross-team influence

HostawayHostaway is a USA-based B2B SaaS provider specializing in vacation rental management software, serving property managers with 2-5,000+ properties globally.

PHP

6 years of experience, PHP, Go, High-traffic systems, Decomposing monoliths, API design, AI coding tools, Cloud environment, Event-driven architecture

HostawayHostaway is a USA-based B2B SaaS provider specializing in vacation rental management software, serving property managers with 2-5,000+ properties globally.

Python · Salesforce

5 years of experience, Python, Django, REST APIs, MySQL, SaaS backend services, Event-driven architectures, Technical initiative leadership, Distributed systems troubleshooting, Git, Salesforce integration

Muck RackMuck Rack is a Miami-based SaaS platform specializing in media monitoring and public relations tools for B2B clients in the global communications industry.

Python · Kubernetes · Docker

7 years of experience, Bash, Python, CI/CD systems, Container image building, Docker, Podman, Kubernetes, Linux systems, Security compliance, Cloud-native compatibility, Open source project contributions

CanonicalCanonical is a London-based B2B open-source software company specializing in Ubuntu and providing commercial support services to global enterprises in sectors like cloud, IoT, and data science.

Java · Kotlin

7 years of experience, Kotlin, Java, Distributed systems, Cloud infrastructure, Platform engineering principles, CI/CD, Observability, AI tools, Web3 passion

OpenseaOpenSea is a Miami-based B2C NFT marketplace specializing in buying, selling, and trading digital assets across multiple blockchains, serving the global crypto collectibles and digital art markets.

Java · Kotlin

7 years of experience, JVM languages (Kotlin, Java), Distributed systems design, Cloud infrastructure, Platform engineering principles, AI tools and workflows, Web3 passion, CI/CD and observability

OpenSeaOpenSea is a leading NFT marketplace headquartered in either Miami or New York, specializing in B2C transactions of digital assets across multiple blockchains in the crypto/Web3 industry.

Python

3 years of experience, Compiler optimizations, MLIR, C/C++, Python, AI workload implementation, LLM inference, Compiler framework design

NVIDIANVIDIA Corporation is a Santa Clara-based technology company specializing in designing GPUs and AI solutions for gaming, professional visualization, and cloud services, operating in both B2B and B2C markets globally.

TypeScript · Node.js

Staff-level architectural ownership, Distributed systems depth, Data architecture at scale, Configurable systems at scale, TypeScript & Node.js depth, Cross-team technical leadership, Platform enablement mindset, Long-horizon engineering

n8nn8n is a Germany-based B2B SaaS workflow automation platform that integrates over 400 tools and services, targeting industries like IT and fintech with a focus on low-code and AI functionalities.

Python · Kubernetes · Docker

5 years of experience, Python, Linux, Automated testing frameworks, Distributed systems, Kubernetes, Docker, AI-assisted coding tools

NVIDIANVIDIA Corporation is a Santa Clara-based technology company specializing in designing GPUs and AI solutions for gaming, professional visualization, and cloud services, operating in both B2B and B2C markets globally.

Python · AWS · Azure

8 years of experience, HPC and AI solution technologies, Job scheduling tools (Slurm, K8s), Linux networking (Redhat/CentOS, Ubuntu), Storage solutions (Lustre, GPFS, Weka.io), Python programming, Automation tools (Jenkins, Ansible), Networking Protocols (InfiniBand, Ethernet), Virtual systems (VMware, Hyper-V), Cloud computing platforms (AWS, Azure)

NVIDIANVIDIA Corporation is a Santa Clara-based technology company specializing in designing GPUs and AI solutions for gaming, professional visualization, and cloud services, operating in both B2B and B2C markets globally.

Python

Python, Linux, AI-assisted development tools, System design, Technical product ownership, C language code review, End-to-end project ownership, Scalable architecture design

Java

5 years of experience, Java, Spring Boot, Asynchronous messaging, Microservices, Financial services understanding, Crypto experience, Design patterns knowledge, Product lifecycle experience

BVNKBVNK is a UK-based fintech B2B platform specializing in stablecoin payment infrastructure, enabling businesses to send, receive, and convert currencies globally.

Python

Strong C proficiency, Linux kernel development, Backporting patches, Git, GNU build tools, Building Linux kernels, Python, Go, Shell scripting, AI-assisted development tools, Intermediate English

SQL

5 years of experience, C#, Microservices architecture, AI tools usage, Architectural decision-making, Data modeling, MS SQL, Unit & integration testing, CI/CD, Web security fundamentals, Integrating LLM/AI features, Strong OOD principles, Good communication skills

Access SoftekAccess Softek is a remote-first B2B fintech company specializing in digital banking solutions and real-time payment systems for financial institutions, headquartered in an unspecified location.

5 years of experience, InfiniBand, Fortinet solutions, HPC networking, TCP/IP, BGP, OSPF, VLANs, QoS, network design, network performance analysis, Linux, scripting, automation, AI/ML infrastructure, RDMA, MPI, low-latency networking

MirantisMirantis is a Campbell, California-based B2B company specializing in open source cloud computing and Kubernetes-native AI infrastructure, serving diverse sectors including automotive, healthcare, and financial services.

Python

Python, Go, Agentic systems, Self-improvement loops, Backend architecture, Cross-functional leadership, Research workflows

poolsidePoolside AI is a Paris-based B2B SaaS company specializing in enterprise AI solutions for software development, targeting businesses globally.

Rust

3 years of experience, Rust, Network services, Asynchronous code, Security-first mindset, Distributed systems, End-to-end ownership, B2B fintech experience

KrakenKraken is a global fintech B2B and B2C cryptocurrency exchange platform, dedicated to accelerating crypto adoption and headquartered remotely with a presence in over 70 countries.

Python · Kubernetes · Docker

Python, Linux, public clouds, containers (docker, kubernetes), devops automation, open source projects

CanonicalCanonical is a London-based B2B open-source software company specializing in Ubuntu and providing commercial support services to global enterprises in sectors like cloud, IoT, and data science.

Python

Python, Distributed systems, Real-time analytical systems, AI tools usage, Fluent in English and Spanish, On-call rotation participation, Performance and reliability focus

TinybirdTinybird is a serverless real-time analytics platform headquartered in Madrid, specializing in B2B solutions for developers and data teams to build scalable analytics applications using ClickHouse.

TypeScript · React

Full-stack product engineering, TypeScript, React, Backend language proficiency, Product sense, Ability to thrive in ambiguity, Understanding of ML model workflows

poolsidePoolside AI is a Paris-based B2B SaaS company specializing in enterprise AI solutions for software development, targeting businesses globally.

AWS

3 years of experience, C#, User-facing product development, GitHub, CI/CD understanding, Fluent English communication, Clean code philosophy, Experience with .NET Framework, Experience with AWS CloudWatch

SQL

5 years of experience, AI engineering stack, Strong SQL, Spec-driven workflow, Judgement in AI usage, Product sense, Low-ego collaboration

cargo.onecargo.one is a Berlin-based B2B SaaS platform specializing in air cargo management, offering tools for freight agents to streamline bookings and operations in the logistics industry.

TypeScript · JavaScript

JavaScript/TypeScript, API integrations, Platform engineering, Energy sector experience, Systematic debugging, Observability improvements, Automation development, Collaboration and communication

EnodeEnode is an Oslo-based climate tech company providing B2B and B2C APIs for connecting and optimizing energy devices, targeting the global market for sustainable energy solutions.