Remote Backend Developer jobs open to Bulgaria.

Python · Go · AWS

6 years of experience, Golang, Python, Event-driven systems, CI/CD tooling, Web application security, SAST/SCA/secret-scanning tooling, AI-assisted engineering, AWS, Kubernetes, Fintech experience, PCI DSS knowledge, Software supply-chain integrity, Policy-as-code familiarity, Threat modeling

SezzleSezzle is a payments platform offering installment plans, credit-building and rewards features to shoppers while connecting merchants to its customer network.

Python · Go · AWS

6 years of experience, Golang, Python, Event-driven systems, CI/CD tooling, Web application security, SAST/SCA/secret-scanning tooling, AI-assisted engineering, AWS, Kubernetes, Fintech experience, PCI DSS knowledge, Software supply-chain integrity, Policy-as-code familiarity, Threat modeling

SezzleSezzle is a payments platform offering installment plans, credit-building and rewards features to shoppers while connecting merchants to its customer network.

Python · Kubernetes

Python, Backend development, Software design patterns, Cloud infrastructure, Test design, Security fundamentals, Authentication/authorization experience, Kubernetes, Internal platform development

ElevenLabsElevenLabs builds AI voice, conversational-agent, creative-media, and developer API products.

Rust

Rust, Backend engineering, System reliability, Scalable systems, UI systems design, Data pipelines, Project leadership, Professional editing tools

ElevenLabsElevenLabs builds AI voice, conversational-agent, creative-media, and developer API products.

Rust

3+ years software engineering, Rust network/async services, modern C++, low-latency trading systems

KrakenKraken is a financial platform where individuals and institutions trade crypto, stocks, ETFs, and futures.

SQL

10 years of experience, ABAP4, ABAP OO, AI-driven development, SAP add-on development, SQL optimization, XBP, XMI, RFC programming, German fluency, Technical architecture ownership, Job scheduling expertise

StonebranchStonebranch is an Atlanta-based B2B SaaS provider specializing in IT automation and orchestration solutions for enterprises across industries such as financial services, healthcare, and technology.

Rust · SQL · AWS

5 years of experience, Rust, async Rust, Tokio, performance profiling, memory management, production-grade services, SQL/NoSQL databases, Docker, Linux, cloud provider (AWS/GCP/Azure)

Python

Python scraping of Google or protected sites, Playwright/Selenium, HTTP/TLS, anti-bot and CAPTCHA handling

AdthenaAdthena is an AI-powered search intelligence platform giving brands, marketers and agencies competitive insight into the paid search market.

React · Node.js · Java

Bulgaria work eligibility, Golang/Java/C/Node.js, microservices, React familiarity, Linux, fluent English

SmartsheetSmartsheet provides enterprise work management software for managing projects, programs and processes.

5+ years distributed systems in production, sharding and replication, performance tuning, Elasticsearch/Vespa a plus

AlphaSenseAlphaSense is a New York City-based B2B fintech platform specializing in AI-driven market intelligence and search solutions for financial institutions and top companies globally.

Backend generalist, complex data-heavy systems, usage reporting/accounts, media pipelines a plus

ElevenLabsElevenLabs builds AI voice, conversational-agent, creative-media, and developer API products.

Rust

6+ years backend, deep Rust, async network services, distributed systems and Kafka, AI-first development workflow

KrakenKraken is a financial platform where individuals and institutions trade crypto, stocks, ETFs, and futures.

Backend-leaning full stack, high-traffic production systems, system design and database fundamentals, production ops

ElevenLabsElevenLabs builds AI voice, conversational-agent, creative-media, and developer API products.

GCP

Google Cloud, Cloud Infrastructure, Cloud Architecture, DevOps, Cybersecurity, Data Engineering, AI-related technical fields

Productive PlayhouseProductive Playhouse is a California-based global data and language-services company specializing in transcription, localization and AI evaluation.

Go

Shipped LLM/agent features to 10k+ users, Golang backend, RAG and tool calling, LLM evals, 1 year Web3 preferred

Trust WalletTrust Wallet is a non-custodial, multi-chain cryptocurrency wallet that lets people self-custody and manage digital assets across 100+ blockchains.

Python · Go

Europe/UK with right to work, senior backend in Golang or Python, production LLM apps, AI coding agents

Refurbedrefurbed runs an online marketplace for refurbished products, letting customers in 23 European countries buy for less while cutting CO2 emissions.

Python

Python, End-to-end ownership, Client-facing communication, Full-stack development, Cloud infrastructure, AI-powered development, Production-minded development, Business thinking, Self-management, Timezone flexibility

AE StudioAE Studio is a custom software development and design agency specializing in AI integration and data science, operating as a B2B provider for clients ranging from startups to Fortune 10 companies.

TypeScript · JavaScript · Node.js

5 years of experience, JavaScript, TypeScript, Node.js, AWS, AI application patterns, LLM-powered features, AI observability, Production AWS, REST/API design, Ownership mindset, English B2

WildixWildix is a Tallinn-based B2B UCaaS provider specializing in AI-powered VoIP and collaboration solutions for businesses across 135+ countries.

Rust

6+ years backend Rust/distributed systems; AI-assisted development. Also eligible: Cyprus, Hungary, Slovakia, Slovenia

KrakenKraken is a financial platform where individuals and institutions trade crypto, stocks, ETFs, and futures.

5+ years backend/AI systems, LLM inference, APIs/distributed systems; also eligible in Cyprus and Hungary

KrakenKraken is a financial platform where individuals and institutions trade crypto, stocks, ETFs, and futures.

AWS · Azure

2 years of experience, MuleSoft Anypoint Platform, API design, Integration Design patterns, Microservices architecture, Public cloud experience (AWS/Azure), Non-profit sector experience, Excellent debugging skills, Strong communication skills

fusionSpanfusionSpan is a Rockville, MD-based B2B technology consulting firm specializing in Salesforce implementations and managed services for nonprofits and membership organizations.

Unity, AI focus, Social gaming

Java · AWS

4 years of experience, Java, Spring Boot, RESTful APIs, Microservices, Distributed systems, Asynchronous processing, PostgreSQL, Redis, Kafka, AWS, High throughput systems, Idempotent transaction processing

Java · AWS

7 years of experience, Java, Spring Boot, RESTful APIs, Microservices, High-throughput systems, Idempotent transaction-processing, AWS, Kafka, Redis, Distributed systems

Python

~1 year production software engineering, Python, European work authorization, B2B contract, 40+ hours/week

KalepaKalepa builds AI-powered underwriting software that helps commercial insurers assess risks and manage decisions from submission through portfolio management.

Python · SQL

Python, Linux troubleshooting, API design and integration, Asynchronous processing, CI/CD, SQL, AI coding agents, Django, Django REST Framework, Celery, RabbitMQ

Java

5+ years backend, Java, Spring Boot, card issuing/payments, out-of-hours on-call

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

3 years of experience, LLMs, CUDA-X APIs, API design, High-quality code, AI-assisted software engineering, Code generation, Programming language design

NVIDIANVIDIA builds accelerated-computing platforms for AI, data centers, gaming, robotics and autonomous vehicles.

TypeScript · Rust

3 years of experience, Rust, Node/Typescript, Security-first mindset, Debugging across OS, network, and application layers, Distributed systems familiarity

KrakenKraken is a financial platform where individuals and institutions trade crypto, stocks, ETFs, and futures.

Python

Enterprise SaaS administration (1,000+ seats), Python or comparable language, Integrating LLM and SaaS APIs, Identity and access management (Okta, OAuth, SCIM, SSO), Operational discipline (intake queues, SLAs), Teaching ability for technical concepts, Clear written communication for documentation, Judgment on capability needs

KrakenKraken is a financial platform where individuals and institutions trade crypto, stocks, ETFs, and futures.