Top Software Engineer Jobs in Bucharest

Senior software engineer responsible for designing, developing, and maintaining business-critical applications. Collaborate with product, QA, DevOps, and stakeholders to translate requirements, implement scalable Java/Python solutions on AWS, address technical debt, improve performance, participate in code reviews, support releases, and ensure application stability and continuous improvement.

Design, implement, and optimize complex algorithms for automated treatment-planning software using modern C++ (C++17+). Participate in end-to-end development, architecture, prototyping, testing, documentation, and regulatory-compliant medical device software practices. Collaborate with clinicians, product, QA, and mentor engineers while improving reliability, performance, and production monitoring.

Design, implement, and maintain desktop applications, cloud services, and automation testing. Lead architecture and feature implementation, perform code reviews, write unit/integration tests, support CI/CD and DevOps, and collaborate within Agile/Lean Scrum teams to improve product quality.

Design and build LLM-powered agents to automate cybersecurity workflows within the Secure Software Development Life Cycle, with priority on vulnerability detection and remediation. Prototype, evaluate, and integrate agentic tools with SSDLC tooling, collaborate in Agile ceremonies, and share best practices on LLMs, agentic patterns, and cloud delivery.

Senior Software Engineer to design and implement C++/Python software, accelerate workloads with CUDA, develop and maintain Linux kernel modules and system services, optimize system and GPU performance, manage Linux systems, mentor junior engineers, and integrate AI technologies across products.

Develop and execute low-level automated tests for secure cryptographic libraries on microcontrollers and emulators, extend and maintain the C/Python test framework, define test specifications, and perform first-level debugging of crypto library issues with developers.

The Embedded Software/Firmware Engineer will deliver new Unifi switch products, collaborate with hardware teams, and communicate with customers for feature implementation and bug fixes.

Design, maintain, and improve CI/CD pipelines, containerization, infrastructure-as-code, and release engineering. Apply platform engineering and SRE practices to ensure reliability for critical systems. Work with GitLab CI/Jenkins, Docker, Kubernetes, Ansible/Terraform, and Linux; cloud experience (GCP) is a plus.

Design, develop, test, and support highly scalable, secure, and compliant cloud services. Build and operate highly available distributed systems used by millions, analyze production performance, troubleshoot across networking, storage, caching, queuing and application layers, and participate in pair programming and code reviews.

Senior SDET responsible for building scalable test automation frameworks, improving test reliability, integrating testing into CI/CD, defining quality standards, coaching teams, and driving adoption of testing best practices across distributed systems.

Design, implement, and own platform-level, performance-critical networking features in C/C++ for hardware-near systems. Work across the full development lifecycle, debug embedded systems, collaborate with field teams, and implement datapath forwarding for ASICs, FPGAs, and network processors.

Design, build, ship, and maintain end-to-end product features across frontend, backend, and data layers. Own projects from definition through production, improve reliability and scalability, collaborate with product and design, mentor engineers, and engage with customers to solve real user problems.

Build foundational agent infrastructure for an AI assistant: orchestration, tool execution, context management, evaluation, and trust/permissions. Ship reliable, observable, and secure backend systems, launch agentic features, own core infrastructure, participate in on-call, and mentor others.

Join the QA team to own manual testing across the full test lifecycle for web and on‑premise pathology products. Design and execute functional, regression, integration and exploratory tests; manage defect lifecycle; collaborate across the SDLC; support incident investigation; maintain traceability and regulated‑grade test documentation. Work closely with automation engineers to inform coverage and interpret results in a fast‑paced, agile environment.

Design, build, deploy, and operate Cloudbeds' POS: React Native/Expo frontend, Python/FastAPI backend, Terraform/AWS infrastructure, and Kubernetes/Argo CD deployments. Deliver offline-first synchronization, reliable APIs, payments, hardware integrations, observability, testing, and production support while partnering with cross-functional teams and mentoring engineers.

Develop and maintain software components for the TACTICOS combat management, radar and sensor systems. Work in an Agile multidisciplinary team to design, implement, test and integrate features with sensor and weapon systems, applying cybersecurity best practices. Use Linux-based environments, C/C++, CI/CD and container tooling to deliver robust naval systems.

Lead design, development, testing, and maintenance of enterprise-grade backend services and APIs in a microservices architecture. Drive technical ownership, mentor developers, apply TDD/BDD and CI/CD practices, troubleshoot complex issues, and contribute to platform architecture and continuous improvement.

Verify customer software builds across platforms by following technical documentation, diagnose and resolve build issues, perform feature testing, analyze dependencies, and communicate results. Contribute to process improvement and stay current with relevant technologies.

Design, develop, and maintain high-quality web applications using CodeIgniter and PHP. Collaborate with cross-functional teams to define and ship features, ensure application performance and quality, identify and fix bugs, and maintain code quality and automation.

Own and improve Langfuse SDKs (Python and TypeScript), ensuring reliability, performance, API design, integrations with AI frameworks, OpenTelemetry support, documentation, and developer experience.

Lead optimization of concurrent systems, scale backend microservices, and collaborate with developers and engineers on deployment for retail solutions.

Develop and improve algorithms for automated treatment-planning software using modern C++ (C++17+). Work in an agile team, engage with clinical experts and product owners, design and implement complex algorithms, create prototypes, participate in architecture and code reviews, write tests and technical documentation, follow medical-device regulatory guidelines, mentor peers, and support production monitoring and maintenance.

Develop, test, and deliver C++ features for a Windows-based 3D CAD system and supporting cloud services. Implement and prototype functionality, improve algorithms for performance, write unit tests, participate in code reviews, and collaborate with QA, product, and cross-functional teams to clarify requirements and ensure high-quality releases.

Lead design and execution of test plans for 3D CAD applications, APIs and AI features. Develop and maintain Python-based automated tests, manage datasets for AI, validate AI algorithms, set up CI, perform non-functional testing, analyze results, and collaborate with cross-functional teams to ensure production-ready releases.

Develop and improve algorithms for automated treatment planning software for Invisalign. Participate in end-to-end development, design, prototyping, code reviews, testing, documentation, and production support. Collaborate with clinical experts and product teams, implement complex algorithms in modern C++17 with full test coverage, follow medical-device regulatory and quality guidelines, mentor other developers, and drive performance, reliability, and architectural improvements.