Top Software Engineer Jobs in Bucharest

Lead development of a low-latency, high-availability FX trading aggregator. Design, build, and support distributed systems; troubleshoot production incidents; mentor team members; participate in Agile development, CI/CD, and operational excellence.

Design, build and maintain AI-embedded Regulatory News applications across the full Agile development lifecycle. Define AI best practices, collaborate with product owners, perform design and peer code reviews, improve code quality, support releases, and reduce operational workload through AI-driven features.

The Software QA Engineer ensures the quality and performance of software through manual and automated testing, collaborating with teams to identify defects and improve quality testing processes.

Develop and maintain key components of a financial exchange platform, coach team members, and ensure design meets security needs.

As a Senior Software Engineer, you will develop and manage a MongoDB solution on various platforms, ensuring reliability and security while contributing to a small team focused on impactful projects.

Lead backend development for ING Banks mobile app frameworks and APIs in multidisciplinary agile squads. Design architectures, implement CI/CD pipelines, ensure automated testing and code quality, mentor junior engineers, collaborate with product and mobile teams, and drive technical standards and knowledge sharing.

Design, build and maintain components of the Elektron real-time data distribution system within an Agile team. Engage with product owners and architects, deliver secure, reliable code, participate in Scrum, maintain CI/CD and automation, document knowledge, and resolve technical issues with minimal supervision.

Build and improve Restream’s web interfaces and user-facing features for the AI Clips team. Design UI and business logic, collaborate with product designers, participate in code reviews, improve system reliability, and evaluate emerging technologies. The role requires strong JavaScript and TypeScript expertise, advanced React knowledge, CSS preprocessor experience, and familiarity with backend development, cloud infrastructure, containers, and continuous deployment.

Lead design and ownership of shared libraries, Spring Boot starters, and agentic frameworks. Set standards for agent orchestration, evaluations, and guardrails. Mentor teams on Python-based agents (LangChain/LangGraph), drive adoption, prototype research directions, and improve developer experience across Kotlin backend and client libraries.

Lead architectural and code-level performance engineering for Elasticsearch, from design through production. Develop performance models, profile distributed systems, identify bottlenecks, optimize logging, metrics, vector search, and ES|QL, and build benchmarks and regression detection for stateful and serverless architectures. Drive AI-assisted optimization automation, collaborate across teams, and mentor engineers. The role emphasizes Java and JVM internals, concurrency, thread-safe and lock-free programming, distributed systems, and large-scale data-store performance.

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 and implement macOS endpoint security systems, ensuring performance and reliability while processing data securely and communicating with backends.

Senior full-stack product engineer owning features end-to-end: research customer problems, write product specs and wireframes, design and implement frontend and backend solutions, collaborate with product, design and infra, and ship high-quality, scalable features for tens of thousands of users.

Senior full‑stack product engineer owning large product areas end-to-end: research, specs, wireframes, implementation, and shipping reliable features. Collaborate with product, design, and infra; balance speed and quality; solve ambiguous customer problems and build scalable abstractions.

Build and scale the internal developer platform: create tools, services and automation (CI/CD, canaries, feature flags, access workflows) using IaC (Pulumi/Python) and Kubernetes to enable safe, fast shipping. Drive platform initiatives, mentor teams, lead AI tool adoption for engineering, participate in on-call and design/code reviews, and ship major improvements across the organization.

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

Architect and build core Decision Intelligence platform capabilities: heterogeneous data integration, semantic modeling, simulation and optimization services, scalable distributed backend systems, AI/ML and LLM-powered production deployments, data pipelines, and operational tooling. Provide technical leadership, own full lifecycle from design to production, improve reliability, observability, and drive engineering excellence.

Design, implement, and optimize Elasticsearch core storage and query engine for observability workloads. Lead architecture, resolve performance bottlenecks in indexing, serialization, and resource utilization, mentor engineers, drive cross-organizational initiatives, collaborate globally on issues and PRs, and write idiomatic modern Java.

Design, implement, test, and maintain cloud-first web applications. Build secure, maintainable code using event-driven architecture and cloud services (AWS/Azure). Collaborate with cross-functional teams, mentor junior engineers, and support CI/CD and PWA development.

Design, build, and operate Threat Protection and ShadowAI services: scalable distributed systems and APIs that detect and control risky web and generative AI usage. Own features end-to-end, maintain availability and latency SLOs, write tests, perform code reviews, use AI-assisted tools, and collaborate with cross-functional teams to improve detection accuracy and production reliability.

The Senior Backend Software Engineer will design and maintain backend services and APIs, optimize data storage, collaborate with teams, and improve system architecture.

Develop cloud-native production systems that process large data volumes. Engage in backend development with Rust and frontend with Angular. Collaborate on product development.

As a Senior Software Engineer, you'll design and build scalable market data systems, improve API architecture, and enhance overall system performance, contributing to Alpaca's infrastructure for trading financial assets.

Build and maintain core post-trade clearing systems and securities-finance infrastructure. Own projects end-to-end, design reliable distributed services and RESTful APIs, integrate new clearing partners, participate in on-call rotation, and improve systems to enable new product offerings.

Build and own end-to-end features across Sona’s platform using AI-assisted development. Direct and correct agent-produced code, work cross-functionally, engage customers in discovery and workshops, and contribute across scheduling, payroll, HR, and mobile domains.