Lead the creation of Payward's Developer & Agent Interface from the ground up: define discovery and interaction models for developers and AI agents, drive adoption (API usage, SDK installs, integrations, GitHub engagement, agent retrievals), build quickstarts, SDKs, CLIs, MCP servers and tooling, partner with Product and Engineering, and own technical storytelling, launches, demos, and ecosystem engagement. Requires strong technical credibility, experience scaling developer adoption, and familiarity with agent-era/AI-native developer experiences.

Remote Senior Solutions Architect in Poland for MongoDB Pre-Sales. Role includes designing scalable systems with MongoDB/Atlas, advising customers on architecture and value, partnering with sales on account strategy and technical discovery, generating demand, and ensuring customer success. Requires substantial customer-facing and pre-sales experience, fluency in Polish, and up to 25% travel. Base salary range for Poland: 287,000–357,000 PLN per year.

BlueCat is hiring an Enterprise Sales Engineer to act as a trusted technical advisor for enterprise customers and partners across network observability, telemetry, AI-assisted operations and infrastructure automation. The role leads technical discovery, proofs-of-value, workshops, solution architecture and collaborates with Sales, Product, Engineering and Customer Success to drive adoption and expansion across hybrid and multi-cloud environments. Moderate travel is expected for strategic customer engagements and events.

Cast AI is hiring a Europe-remote Product Manager to own product areas end-to-end for a cloud-native, Kubernetes-powered platform. Candidates must have proven B2B product experience, strong Kubernetes knowledge (CKA preferred/required within 6 months), experience using AI/LLMs in product work, and enterprise customer engagement skills. Role accepts applicants residing in specified European countries. Cast AI does not provide visa sponsorship.

Wikimedia Foundation is hiring a Senior Site Reliability Engineer for Wikimedia Enterprise to design, develop, and maintain reliable, scalable infrastructure for high-volume API services. Responsibilities include defining SLOs/SLIs, building observability, running Kubernetes and cloud infrastructure, implementing CI/CD/GitOps (e.g., GitLab, ArgoCD), incident response and on-call duties, and collaborating with distributed teams. Strong SRE, cloud, IaC, observability, and automation skills are required.

Wikimedia Foundation seeks a Senior Site Reliability Engineer for remote-first work on Wikipedia’s public-facing infrastructure, focused on data persistence. Responsibilities include deployment, configuration, maintenance, automation, architectural collaboration, and participation in a shared 24/7 on-call rotation. Requires 6+ years in SRE/Operations/DevOps, Linux troubleshooting (Debian), configuration management (Puppet), scripting (primarily Python), Kubernetes, distributed caching, monitoring, and incident response. Role expects travel 1–2 times per year. US-based applicants have an indicated salary range of USD 113,082–175,725; Wikimedia lists a set of non-US countries where it can hire via EOR.

Lead a multi-team Orchestration organisation that powers core payments (checkout, routing, processor integrations, merchant APIs). Accountable for technical roadmap, security, reliability, scalability, architectural evolution, and developing engineering leaders while running high-throughput production systems. Role reports to the CTO and is fully remote with distributed hiring across listed countries.

Lead and grow a team of software engineers owning delivery, technical direction, and operational excellence for the Account Experience surface (Primer Companion, merchant setup, monitors, workflows, auditing). Role requires hands-on technical credibility for system design and reliability, partnering with Product on roadmap and hiring as the company scales. Remote-first role available across the listed countries.

Join the Account Experience team to design and deliver backend services (Primer Companion, Merchant Account Setup, Monitors, Workflows, Auditing) with end-to-end ownership from scoping to production. The role emphasizes reliability, performance, observability, distributed-systems fundamentals and working with REST APIs; payments/fintech experience is a plus.

Work on Primer's Orchestration team owning backend features end-to-end: design, implementation, monitoring, and incident resolution for services that handle real payment volume. Role emphasizes distributed systems fundamentals, reliability, observability, API design, and contributing to architecture and engineering standards.

Time & material freelance role designing and shipping firmware for connected devices (wearables, audio, health-tech). Requires 4+ years professional firmware development, strong C/C++, hands-on ESP32 (ESP-IDF/ADF) and STM32 experience, BLE and IoT protocol knowledge, and English at B2+. Fully remote, flexible hours; potential path to permanent contract after an initial freelance period.

Freelance Senior Android Developer role working remotely (Warsaw-based office optional). Responsibilities include designing, building and maintaining Android apps that communicate with hardware over BLE, writing Kotlin, using Jetpack Compose, applying unit testing/TDD, reviewing code, and using AI tools in the workflow. Initial freelance/time & material engagement (paid by hours); potential path to permanent contract and benefits after ~3 months. English (B2+) required.

Freelance Senior Flutter Developer to deliver cross-platform Flutter apps that interact with firmware and physical devices via BLE (experience with flutter_blue_plus preferred). Fully remote (Warsaw office & Gdansk cowork optional), paid on B2B hourly basis (90–180 PLN/h). Path to permanent contract possible after initial 3 months. Role requires commercial Flutter and Dart experience, platform debugging (iOS/Android), and strong problem-solving and collaboration skills.

Freelance Senior iOS Developer role (fully remote, Warsaw office available). Paid hourly B2B (90–180 PLN/h). Responsibilities: build and maintain iOS apps communicating with BLE hardware, write unit tests (XCTest/Quick/Nimble) with a TDD mindset, maintain CI/CD (GitHub Actions/Bitrise/Travis), review PRs, and collaborate with firmware, design, QA, and PMs. Path to permanent contract possible after initial 3 months.

Senior backend engineer (freelance, T&M) to own end-to-end backend architecture for IoT/connected-device projects: data ingestion, APIs, cloud infra on AWS (EKS, Aurora, DynamoDB, Timestream, S3), Kubernetes, Docker, Terraform, MQTT and CI/CD. Requires 7+ years backend experience, strong Node.js in production, deep AWS and infra experience, English B2+. Fully remote with optional Warsaw office/coworking in Gdansk. Initial freelance period may lead to a permanent contract.

Join as a freelance Mobile Developer owning the mobile side of connected-product projects (wearables, sensors, health-tech). Design and implement robust BLE communication flows, debug device interactions, and work alongside firmware, backend, design, QA and PMs. Role is fully remote (optional Warsaw/Gdansk offices), paid 90–180 PLN/h B2B, with a path to a permanent contract after a successful initial 3-month period. Recruitment and day-to-day work in English (B2+).

Lead and mentor engineers to plan, schedule, and execute projects to create, optimize, and deploy training and inference deep learning workloads. Coordinate across teams and geographies, work on optimized numerical and DL algorithms, interact with scientific teams, and occasionally travel to conferences or customers. Minimum BSc and 8 years related experience (including 3 years management).

Senior data science leader role requiring 10+ years in data science/ML engineering and 4+ years managing teams. Responsibilities include setting multi-team roadmaps, mentoring, overseeing statistical modeling, experiment design, classifier implementation, LLM/AI work, improving data pipelines, and ensuring privacy-aware analytics across product and revenue areas. Position is remote with listed country eligibilities and includes an annual compensation figure disclosed for the US.

Join Kraken's Payments & Blockchain team to design, develop, and maintain payment processing systems using React, React Native and related frontend technologies. Responsibilities include building secure, scalable transaction experiences, integrating with payment providers and blockchains, influencing technical decisions, and mentoring engineers. Requires 5+ years of software development experience and strong English communication skills.

Precision for Medicine seeks a Senior Clinical Project Manager with 5+ years industry experience and at least 4 years full-service project management in a CRO to lead global/regional Oncology clinical trials (phase I–IV). Responsibilities include end-to-end project oversight, budgeting, stakeholder and client management, coordination of cross-functional teams, proposal development, and ensuring compliance with GCP/ICH. Remote role based in Poland with domestic and international travel expected.