Remote Backend Developer jobs open to Poland.

Java · Kotlin · Kubernetes

Strong backend, Java or Kotlin, microservices, PostgreSQL, Kafka, Kubernetes, fintech/payments a plus

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

Java · Kotlin

7+ years backend, Java/Kotlin, Spring Boot, Kafka, billing/payments/ledger systems

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

Java

Java and Spring Boot backend, event-driven microservices, Kafka, real-time systems, employee contract (no B2B)

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

Java · Kotlin

Java or Kotlin, Spring Boot, Kafka, event-driven microservices, high-integrity financial systems

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

TypeScript · Go

5+ years backend services in production with on-call, TypeScript or Golang, OAuth/OIDC/JWT, PostgreSQL

SupabaseSupabase is a Postgres development platform providing databases, authentication, storage, APIs and related developer tools.

Python · Kotlin · AWS

8 years of experience, Python, Kotlin, AWS, MySQL, Kubernetes, Correctness-sensitive systems, Data-processing systems, Cross-team collaboration, Technical strategy development, Code quality advocacy

AffirmAffirm operates a payment network that gives consumers flexible ways to pay and helps merchants grow.

React · Vue · Python

1.5 years of experience, Python, Kotlin, React, Vue, Declarative UI frameworks, Mobile application development, Code review, Debugging, Collaboration with product management, Agile methodology

AffirmAffirm operates a payment network that gives consumers flexible ways to pay and helps merchants grow.

Python

6-7+ years commercial development, Python 3.x, Django, high-load systems, fluent Russian, intermediate+ English

TorreroTorrero provides white-label casino and sportsbook platforms and B2B game aggregation for iGaming operators.

Python

5+ years commercial development, Python 3.x, Django, high-load systems, fluent Russian, intermediate+ English

TorreroTorrero provides white-label casino and sportsbook platforms and B2B game aggregation for iGaming operators.

Java · Kotlin · AWS

Java, Kotlin, AWS, Event-driven architecture, REST APIs, Kafka, Terraform, Distributed systems, Cloud-native systems, Scalable systems

MasabiMasabi is a London-based B2B technology company specializing in fare collection solutions for public transport systems, with a global presence in major cities.

SQL

6-8+ years software development, C#/.NET, SQL Server and T-SQL, AI-assisted dev tools, English B2+

Aras CorporationAras provides product lifecycle management software for engineering and manufacturing companies.

Python · Go · Kubernetes

5 years of experience, Golang, Python, Kubernetes, AI-assisted coding, Distributed systems

Lemon.ioLemon.io is a Ukraine-based B2B platform connecting startups with vetted freelance developers, offering services globally across various sectors.

Go

Golang or comparable backend language, distributed systems, Kafka, Pub/Sub or SQS messaging

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

GraphQL · Ruby

Ruby on Rails, testable Rails code, relational databases (PostgreSQL a plus), GraphQL a plus, Tier 2 on-call

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

Python · SQL · Azure

4 years of experience, Python, FastAPI, Azure, Databricks, REST APIs, SQL Server, Docker, Asynchronous processing, Messaging systems, CI/CD

Mutt DataMuttdata is a data and AI consultancy that builds data platforms and machine learning systems, such as forecasting and recommendation models, for client companies.

Python · SQL · Azure

4 years of experience, Python, FastAPI, Azure Databricks, Asynchronous processing, SQL Server, Docker, Azure services, CI/CD participation

Mutt DataMuttdata is a data and AI consultancy that builds data platforms and machine learning systems, such as forecasting and recommendation models, for client companies.

Python · Java · AWS

HPC, AWS, Java, Python, C++, Web API architecture, Containerization, Distributed systems, Linux, Infrastructure automation, Cloud integration

Node.js

5+ years backend with Node.js in production, distributed systems, PostgreSQL tuning, observability

SupabaseSupabase is a Postgres development platform providing databases, authentication, storage, APIs and related developer tools.

3+ years Haskell, C, PostgreSQL/plpgsql, open-source contributions, Linux debugging

SupabaseSupabase is a Postgres development platform providing databases, authentication, storage, APIs and related developer tools.

Rust · AWS · Kubernetes

Rust, Postgres compatibility, Deterministic Simulation Testing, Formal verification methods, Fuzz testing, Differential testing, AWS, Kubernetes, Embedded databases, Remote team collaboration, Cloud systems observability, Cloud systems reliability, Cloud systems performance

SupabaseSupabase is a Postgres development platform providing databases, authentication, storage, APIs and related developer tools.

Python

Python, Django, Postgres, RabbitMQ, Celery, REST APIs, CI/CD practices, Billing systems

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

GraphQL · Ruby

Ruby and GraphQL, relational databases, full-stack experience, AI coding agents, Tier 2 on-call

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

TypeScript · Python · Java

Open Source Contributions, Backend Development and API Design, Python, Java, C++, Go, Rust, TypeScript, Debugging and Troubleshooting, Automated Testing and Code Validation, Performance Optimization

Weekday AIWeekday provides AI-assisted candidate sourcing and recruiting services for employers.

Python · Kotlin · AWS

2+ years software engineering, backend in Python or Kotlin, AWS, MySQL, Kubernetes, on-call

AffirmAffirm operates a payment network that gives consumers flexible ways to pay and helps merchants grow.

JavaScript · Rust · AWS

3 years of experience, PostgreSQL Expert, Nix packaging, Ansible, Docker, AWS, Kubernetes, C/C++ builds, Go, JavaScript, Rust, Infrastructure management, Customer engagement, Proactive problem-solving

SupabaseSupabase is a Postgres development platform providing databases, authentication, storage, APIs and related developer tools.

Python

5 years of experience, Trust & Safety systems, Python, Distributed systems, Cloud applications, End-to-end system ownership, APIs design, Collaboration with non-technical stakeholders, Problem-solving in ambiguous situations

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

Python

Python, Backend development, Payment processing experience, Stream processing, Debugging complex production issues, Test design fundamentals, Attention to detail in financial systems

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

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.