Senior Backend Engineer Jobs in Poland

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Imachines·Poland· +1 country·Remote · Poland

Senior Backend Engineer, Security Automation

Intuition Machines builds enterprise security products with an AI/ML focus. We apply our research to systems that serve hundreds of millions of people, with a team distributed around the world. You are probably familiar with our best-known product, the hCaptcha security suite. Our approach is simple

upside·Poland·On-site

Senior Backend Engineer

Upside is a software consultancy built by engineers, for engineers. We partner with global companies to solve real, complex technical challenges. We’re deep into Applied AI and R&D, building both production-grade platforms for clients and our own open-source tools like Enthusiast (Agentic AI framewo

xflow·Poland·On-site

Senior Backend Engineer (Go)

X-FLOW is a mobile game development company established in 2018. We gained recognition after the release of Happy Color, the most popular digital coloring book and one of the most successful ad-driven mobile apps in the world. We are currently looking for a Senior Backend Engineer (Go) for our flags

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Cxmdirect·Poland· +5 countries·Remote · Belarus

Senior Backend Engineer-Payments

We are an international broker. Our clients fund and withdraw through roughly 60 payment methods across Asia, Africa, LATAM and the Middle East. Payments is now a standalone function, and we are building the team around it. We are looking for a Senior Backend Engineer who will own our connector laye

The-Cypress-Group·Poland·On-site

Senior Backend Engineer

Shelf·Poland·On-site

Backend Engineer (Python)

About Shelf Shelf is the operating system for agentic AI: a platform that models your policies, workflows, and operational logic into an AI Data Model so AI agents don't just respond—they reason. The result is AI that understands how your business actually operates and delivers precise, compliant, a

Uncapped·Poland·Remote · Poland

Senior Backend Engineer

Remote role based in Poland with occassional visits to the office Join Our Mission 🚀 Help ambitious founders scale their businesses through innovative financing solutions. We value curiosity, continuous learning, and impactful problem-solving. Tech You’ll Use 🔧 Core: Java 21, Spring Boot/Cloud 3.3 I

first connect insurance services·Poland·On-site

Senior Backend Engineer (Poland, Remote)

About First Connect: First Connect Insurance Services is a digital marketplace providing independent insurance agents access to top US carriers and the optionality necessary to grow their businesses. Agents can work with 130+ carriers, selling various insurance policies, including home, auto, small

trust-wallet·Remote · open to Poland

Senior Backend Engineer (Go)

About the company Trust Wallet is the leading non-custodial cryptocurrency wallet, trusted by over 200 million people worldwide to securely manage and grow their digital assets. Our vision is to give individuals the freedom to own their assets, confidently participate in the future economy, and acce

toogeza·Remote · open to Poland

Senior Backend Engineer

We are toogeza, a Ukrainian recruiting company that is focused on hiring talents and building teams for tech startups worldwide. People make a difference in the big game, we may help to find the right ones.Currently, we are looking for Senior Backend Engineer for Elva. Location: RemoteJob Type: Full

playson·Remote · open to Poland

Senior Backend Engineer (Boosters)

About the RoleOur promotional features team is seeking a Senior Backend Engineer. This role is focused on developing and optimising promotional features for our gaming platforms, where performance, scalability, and cutting-edge solutions are paramount.If you’re a product-passionate person, your mind

grupo moss·Poland·Hybrid

Senior Backend Engineer (f/m/d)

At Moss, we give finance professionals the power to automate their day-to-day and make forward-thinking decisions. Our culture is what makes that possible: we play to win, we obsess over quality, and we win as One Moss, and it works. Moss closed a €35 million Series C in August 2026, crossing a €1 b

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Fuse Energy·Poland· +5 countries·Remote · France

Senior/Lead Backend Engineer (Remote)

Fuse Energy is an energy startup on a mission to make energy abundant and affordable, fast. We combine first-principles thinking with cutting-edge technology to build a radically better energy system. We've raised over $200M from top-tier investors including Balderton, Lakestar, Accel, Creandum, Low

netwrix-corporation·Poland·On-site

Senior Backend Engineer — 1Secure Platform

About Us At Netwrix, our mission is to revolutionize data security by placing identity at the core - providing unparalleled visibility and control. Engineered and supported by over 900 highly talented, motivated employees and hundreds of trusted partners in nearly every geography, Netwrix solutions

GitLab·Poland·Remote · Poland

Senior Backend Engineer (Ruby), Production Engineering:Tenant Controls

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the

GitLab·Poland·Remote · Poland

Senior Backend Engineer, Trusted Agentic Development

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the

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Box·Poland·On-site

Senior Fullstack Engineer, HomeWeb

What is Box? Box (NYSE:BOX) is the leader in Intelligent Content Management. Our platform enables organizations to fuel collaboration, manage the entire content lifecycle, secure critical content, and transform business workflows with enterprise AI. We help companies thrive in the new AI-first era o

Fresha·Poland·Remote · Poland

Senior Backend Engineer (Remote - Poland)

Location: Warsaw, Poland — Onsite (4 days on-site) Contract: B2B · 25–40 k PLN net / month + RSUs The AI-powered OS for beauty, wellness and self-care Fresha is the operating system for the global beauty, wellness and self-care industry, connecting and powering everything from salons and barbers to

GitLab·Poland·Remote · Poland

Senior Backend Engineer (Go), Tenant Scale: Gitaly

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the

GitLab·Poland·Remote · Poland

Intermediate-Senior Backend Engineer (Ruby), Plan: Spec-Driven Development

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the