Remote Backend Developer jobs open to Poland.

React

3 years of experience, React, React Native, Blockchain fundamentals, Web3 integration, Prediction markets experience, DeFi protocols, Performance optimization

MetaMaskMetaMask is a self-custodial financial platform that allows users to hold, spend, save, and grow both crypto and traditional assets.

Ruby

Backend architecture, APIs, Performance tuning, Modular backend boundaries, Agentic AI systems, Asynchronous communication

GitLabGitLab provides a DevSecOps platform for planning, building, securing and delivering software.

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 leading B2C multi-chain, non-custodial cryptocurrency wallet enabling users to manage over 10 million digital assets, headquartered remotely with a global user base.

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.

US/Canada Eastern region or Warsaw, 5+ years, in-path authz/policy enforcement, Cedar or OPA/Rego, LLM security

RedpandaRedpanda builds a streaming data platform and agentic data plane that let enterprises connect AI agents to data while governing what they access and do.

10+ years software, AuthN/AuthZ and identity systems, OAuth 2.1/OIDC, token exchange/OBO, Okta/Entra federation

RedpandaRedpanda builds a streaming data platform and agentic data plane that let enterprises connect AI agents to data while governing what they access and do.

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 · Kubernetes

5+ years production code, Python backend, OpenStack or another cloud control plane, Kubernetes, Linux virtualization

GcoreGcore is a Luxembourg-based B2B cloud and edge computing company specializing in web performance, content delivery, and security solutions for global industries.

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.

Java

Java, Spring Boot, event-driven architecture, RabbitMQ, relational and NoSQL databases, scalable application design, healthcare solutions, Polish fluency, English fluency

NFQNFQ builds digital products and platforms, including software for commerce, logistics and AI.

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 · Node.js · SQL

2 years of experience, Node.js, TypeScript, Express.js, NestJS, SQL, NoSQL, AI integration, OOP principles, Design patterns, Docker, GitHub Actions

MasterBorn SoftwareMasterBorn is a Nashville-based B2B custom software development company specializing in scalable digital products for the SportsTech, FinTech, and MedTech sectors.

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.

Python · Rust · Ruby

Linux build toolchains, Container images, Debian/RHEL packaging, Continuous integration systems, Shell scripting, Cloud provider experience, Ruby/Go/Python/Rust

GitLabGitLab provides a DevSecOps platform for planning, building, securing and delivering software.

4+ years backend, scalable production services, ads systems (bidding, ranking, serving)

WhatnotWhatnot is a live shopping marketplace where sellers stream to sell trading cards, collectibles, fashion, electronics, and more to buyers in North America and Europe.

Python · GCP · Docker

3 years of experience, Python, FastAPI, PostgreSQL, MongoDB, Celery, Redis, OpenAI, Google Cloud Platform, Docker, Nginx, Asynchronous architectures

SBC PerformanceSBC Performance provides performance marketing, creative and ad-tech services across ecommerce, health, education and entertainment.

Python · Kotlin · Rust

Go, Kotlin, Rust, Python, SQL, Orchestration systems, Data lifecycle management, Schema evolution, Data correctness, Stateful stream processing, Distributed systems, AI tools proficiency, Clear written communication

DuneDune is a remote-first B2B SaaS platform specializing in multi-chain crypto data analytics, empowering developers and investors with insights into blockchain ecosystems.

JavaScript · PHP · SQL

PHP 8, Laravel, JavaScript, CSS, HTML, Debugging, Incident response, Root-cause analysis, Relational databases, SQL, Git, CI/CD, Autonomous work, Professional English (B2+)

Intel 471Intel 471 is a Wilmington, DE-based B2B cybersecurity company specializing in SaaS-based cyber threat intelligence solutions for enterprises and government agencies worldwide.

GCP · Kubernetes

Go, Kubernetes, Large-scale backend development, Microservices architecture, Performance analysis, Security product architecture, GCP services, Distributed systems optimization, API integration with SaaS applications

CyberhavenCyberhaven provides an AI-native data security platform for protecting data across human and AI-agent workflows.

SQL

Database performance optimization, Strong SQL, Backend engineering, Data architecture design, Lakehouse experience, Schema design for semi-structured data, Streaming ingestion experience, Migration or re-architecture track record

OscilarOscilar is a US-based fintech B2B SaaS provider specializing in AI-native risk decisioning for fraud prevention, credit underwriting, and AML compliance, serving banks and digital organizations.