Top Software Engineer Jobs in Warsaw

Design and implement core Web3 protocol features and secure smart contracts in Solidity. Integrate blockchain solutions with cross-functional teams, ensure scalability and performance, stay current on EVM internals, conduct code reviews, and mentor junior engineers.

Design and build key features for an AI coding platform, focusing on user experience and product growth in a collaborative environment.

The Senior Software Engineer will focus on optimizing databases, addressing complex issues, and contributing to a new project in a fast-paced environment.

Design and implement real-time telemetry pipelines and fault-tolerant integration layers between IT and OT systems for datacenter power and grid-aware workload control. Own architecture and delivery of safe, reliable control systems from edge to control plane.

Design and implement a video processing engine, develop a cross-platform rendering engine, integrate systems, and optimize performance while collaborating with other engineers.

Design, implement, test, deploy, and operate import/export services for a cloud-native SaaS. Build React+TypeScript UIs, architect resilient distributed systems, own production reliability and on-call duties, improve CI/CD and observability, mentor engineers, and collaborate on product and design system development.

Be the hands-on technical owner of the LiteAPI product: design, implement, and operate backend/API infrastructure, lead technical decisions, work closely with product, stakeholders, and customers, and mentor engineers while shipping high-impact features in a fast-moving startup.

Design, architect, and deploy end-to-end AI solutions (RAG pipelines, autonomous agents) to improve risk management. Translate regulatory and capital requirements into technical specifications and prompts, build infrastructure and testing strategies, and collaborate with regulators, senior risk managers, and engineering teams on distributed AI systems.

Designs and executes test plans for Power BI reports, dashboards, ELT pipelines and web-based data tools. Validates data integrity using SQL, verifies transformations and mappings, logs defects, performs regression/integration testing, and collaborates with engineers and analysts to improve reporting and data validation frameworks while ensuring governance and performance.

Design and build the developer-facing project, secrets, and observability platform connecting Magic Containers, Edge Scripting, and Bunny Database. Implement environment management, secrets APIs, unified logs/metrics, fine-grained API keys/permissions, and multi-tenant secure systems. Drive API design, testing, and architecture decisions across the Core API team.

Lead design and implementation of core backend services for high-performance distributed systems. Own technical decisions, build for scale, write well-tested code, use modern practices (BDD/TDD), collaborate cross-functionally, conduct code reviews, and produce internal documentation.

Develop core backend components for a blockchain network, focusing on reliability and scalability, mainly using Rust. Ensure code quality through testing and debugging.

The Senior Full-stack Engineer will design and build features in TypeScript, driving projects with a product mindset and collaborating in a dynamic startup environment.

The Staff Software Engineer will lead technical direction, improving system design and mentoring others while writing code and collaborating across teams for a cloud-based generative coding platform.

Build and maintain user-facing features and interfaces for Restream web services. Design and implement UI and business logic, collaborate with product designers and engineers, perform code reviews, improve reliability and scalability, and evaluate emerging technologies.

Build and optimize the core edge platform for a hybrid edge-cloud video security system. Implement streaming, recording, on-device AI, and low-latency communication. Profile and tune CPU/memory, improve concurrency and performance, containerize workloads, and collaborate with AI/ML engineers to deploy models on resource-constrained devices.

Build and maintain full-stack product features for Assessments, Interviews, and Learn. Drive identity and authentication systems, write clean maintainable code, perform code reviews, collaborate cross-functionally, and lead technical design discussions to deliver business-impacting features.

The Senior Software Engineer will design and develop high-quality web and mobile applications, ensuring code quality while collaborating with product teams and mentoring junior engineers.

Design and implement core cloud platform services, control-plane components, and internal APIs. Build platform abstractions and production-grade Go tooling, drive architectural initiatives (gRPC, eventing, cluster-api), improve scalability and developer experience, and support production incidents when needed.

Work on YDB distributed storage and database systems to maximize performance on modern and legacy hardware (NVMe, HDD, DPUs). Reengineer components for low-latency, high-throughput workloads, profile and debug production systems, and design resilient distributed storage primitives. Collaborate on incident resolution and production deployments to support Nebius cloud services.

Build and maintain a distributed, fault-tolerant, high-performance block and filesystem storage system. Work on virtualization (virtio-blk, virtio-fs, QEMU, vhost-user), high-throughput VM-to-storage networking (TCP, RoCEv2/RDMA), and core storage features like replication, consensus, self-healing, and data migration. Debug and optimize performance-critical I/O paths while writing reliable, maintainable code in a collaborative team environment.

Own and evolve a custom Chromium fork to evade anti-bot detection, reverse-engineer JavaScript challenges, build automated tooling and pipelines for evasion, develop observability for fingerprint mismatches, and mentor engineering on browser internals and stealth techniques.

Lead analysis and resolution of system performance issues across Akamai's distributed Linux platform. Design and implement scalable software and tools for performance detection, mentor engineers, and collaborate across teams to deploy efficient solutions.

Build foundational agent infrastructure for LLM-driven developer assistant: orchestration, tool execution, context management, evaluation, and trust/permissions. Ship reliable, observable backend systems, own core infra, participate in on-call, and mentor peers while launching agentic features to customers.

Design, build, ship, and own end-to-end product features across frontend, backend, and data. Translate ambiguous product requirements into reliable, well-tested systems; deploy, monitor, and maintain production services; participate in design and architecture, code reviews, and mentor peers while working closely with product and design teams.