Remote Backend Developer jobs open to Poland.

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

Python · Kotlin · AWS

4 years of experience, Python, Kotlin, AWS, MySQL, Kubernetes, Distributed systems, Technical planning, Code quality, Mentorship, On-call rotation

AffirmAffirm is a U.S.-based fintech company offering a buy now, pay later (BNPL) service that allows consumers to make purchases in installments, primarily targeting the retail sector with both B2C and B2B business models.

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.

Python · Java · Azure

5 years of experience, SailPoint IdentityIQ, Java, Python, PowerShell, REST API, SCIM, LDAP, Git, CI/CD, Active Directory, Azure AD, SAML 2.0, OIDC, OAuth 2.0, RBAC, Polish language proficiency

InPostInPost is a Kraków-based logistics company specializing in out-of-home delivery solutions through a network of Automated Parcel Machines, serving the e-commerce industry across Europe with both B2B and B2C services.

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.

Java · SQL · GCP

8 years of experience, Java 21, Spring Boot/Cloud 3.3, GCP, Kubernetes, SQL/NoSQL, Testing expertise, C1 English proficiency

UncappedUncapped is a fintech company headquartered in an unspecified location, specializing in B2B revenue-based financing for high-growth online businesses and retailers across North America and Europe.

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.

JavaScript · PHP

1 years of experience, PHP, Javascript, Relational databases, Security principles, Abuse fighting familiarity, Cross-team objectives, User and product impact

Wikimedia FoundationThe Wikimedia Foundation is a San Francisco-based nonprofit organization providing free, multilingual educational content through its wiki-based projects, including Wikipedia, targeting a global audience.

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.

Kubernetes

Go, Kubernetes, Large-scale backend architecture, Security features for AI models, Performance analysis, API integration with SaaS/AI platforms, Microservices, Distributed systems optimization, Graph dataset handling

CyberhavenCyberhaven is a remote-based B2B cybersecurity company specializing in AI-powered data protection and advanced threat detection for organizations globally.

TypeScript · AWS

TypeScript, Node, AWS, API design, Home energy systems, Integration with OEMs, Backend services, Scalability and performance design, Customer-focused development, Debugging production features

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.

Python · Kotlin · AWS

Python, Kotlin, AWS, MySQL, Kubernetes, Distributed systems knowledge, Code review proficiency, Strong communication skills

AffirmAffirm is a U.S.-based fintech company offering a buy now, pay later (BNPL) service that allows consumers to make purchases in installments, primarily targeting the retail sector with both B2C and B2B business models.

TypeScript · JavaScript · Python

5 years of experience, Python, TypeScript, JavaScript, AI-assisted engineering tools, Scalable backend systems, Relational database design, Technical design documentation, Insurance tech experience

EvolutionIQEvolutionIQ is a New York-based B2B insurtech company specializing in AI-driven solutions for disability and injury claims management, serving the U.S. and global insurance markets.

Kubernetes

Go, Kubernetes, AI security architecture, Large-scale system design, Microservices, Performance optimization, API integration with AI platforms, Database management at scale, Real-time data processing, Mentorship and technical leadership

CyberhavenCyberhaven is a remote-based B2B cybersecurity company specializing in AI-powered data protection and advanced threat detection for organizations globally.

TypeScript · React · Python

5 years of experience, Python, Django, TypeScript, React, PostgreSQL, AWS, CI/CD (GitHub Actions), Data modeling, Frontend architecture, Financial services experience

WayflyerWayflyer is a Dublin-based fintech B2B company specializing in revenue-based financing for e-commerce businesses, offering flexible funding solutions globally.

Python

Python, Go, Production APIs, Distributed systems, Backend architecture, API design, Database design, ML research workflows

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

Rust

8 years of experience, Rust, C++, DeFi experience, Web3 experience, Asynchronous programming, Concurrency patterns, High-availability systems, Security measures, Relational databases, Low-latency messaging technologies, Cloud platforms, Containerization tools, Network programming, Latency-sensitive trading systems, Blockchain technology, Finance knowledge

MLabsMLabs is a remote fintech company specializing in DeFi solutions, providing a unified API for financial institutions to access on-chain liquidity across major blockchains.

Ruby

5 years of experience, Ruby, Ruby on Rails, PostgreSQL, Redis, Hotwire, Tailwind CSS, Tech scale-up experience, User-centricity, Ownership mindset, Doer mindset, Comfort with uncensored content

EverAIEverAI is a leading AI companionship platform based in a remote-first environment, offering Candy.AI, the world's largest AI girlfriend/boyfriend app, targeting a global B2C market with over 40 million users.

Python · Kotlin · AWS

8 years of experience, Python, Kotlin, AWS, MySQL, Spark, Kubernetes, Financial systems experience, Distributed systems design, Technical strategy development, Cross-functional collaboration, Code quality advocacy

AffirmAffirm is a U.S.-based fintech company offering a buy now, pay later (BNPL) service that allows consumers to make purchases in installments, primarily targeting the retail sector with both B2C and B2B business models.

TypeScript

TypeScript, API integrations, AI fluency, Platform engineering, Observability, Debugging across services, Clear 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.

TypeScript · JavaScript

JavaScript/TypeScript, API integrations, Platform engineering, Observability, Debugging, Energy sector experience, AI utilization in engineering

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.

SQL

Backend systems, Distributed systems, Strong SQL, AI coding assistants, Data pipelines, Growth mindset, Debugging skills, Collaboration across functions

TraackrTraackr is a global B2B SaaS platform headquartered in multiple locations including San Francisco and Paris, specializing in data-driven influencer marketing solutions for brands across various industries.

SQL

3 years of experience, Backend systems, AI coding tools, Data pipelines, SQL, Distributed systems, Version control (Git), CI/CD workflows, Problem-solving, Growth mindset

TraackrTraackr is a global B2B SaaS platform headquartered in multiple locations including San Francisco and Paris, specializing in data-driven influencer marketing solutions for brands across various industries.