Top Software Engineer Jobs in Hungary

The Frameworks Software Engineer will build complex backend solutions, maintain code quality, architect abstractions, and collaborate with engineering and product teams.

Build end-to-end full-stack AI features on a Ruby on Rails backend and React frontend, including LLM inference infrastructure, RAG, AI agents, and evaluation/observability. Design and run experiments (A/B tests), optimize systems for production performance and reliability, and iterate rapidly with product and design partners.

Build and evolve Circle Discover marketplace features: high-converting purchasing flows, algorithmic recommendations, content feeds, and listings. Work across a Ruby on Rails backend and React/Next.js front-ends, optimize performance and SSR/SSG, collaborate with designers and leaders, and improve codebase quality while shipping at pace in a distributed remote team.

Develop, test, deploy, and maintain full-stack SaaS software. Integrate LLM APIs and external services, troubleshoot and improve existing systems, collaborate with product and design, and produce technical documentation.

As a Backend Engineer, you will build and maintain scalable backend systems, work on significant development tasks, and collaborate with teams to enhance the Wise platform while ensuring code quality and stability.

Design, build, and maintain scalable data infrastructure and ETL/ELT pipelines (Snowflake, dbt, Airflow). Develop backend APIs and cloud-native services on AWS, collaborate with data scientists and engineers, implement resilient distributed systems, and support the full software lifecycle.

Lead design, build, and deploy scalable microservices and AI-driven contact automation for the Wise Assistant. Own intent detection, contact processing, routing logic, LLM/RAG integrations (AWS Bedrock), third-party AI agent integrations, performance and reliability optimizations, and mentor engineers while collaborating with cross-functional teams to automate customer support issues.

Build and maintain AI-powered spam and scam detection infrastructure: design, implement, deploy, monitor distributed pipelines, support data science workflows, handle production incidents, and improve system resilience and scalability.

Build and own end-to-end features across backend and frontend: design backend services and data models (Python/Django), implement RESTful APIs, create reusable frontend components (TypeScript/React), write tests, participate in code reviews, maintain production reliability and security, and collaborate with product and design.

Develop and maintain C# applications, design robust solutions with the team, write unit tests and occasional end-to-end test plans, conduct code reviews, and diagnose and resolve technical issues to ensure code quality and reliability.

As a Senior Software Engineer, you will design and deliver secure microservices for Diligent's platform, leveraging AWS and AI tools while mentoring peers.

Design and deliver data-driven solutions by partnering with subject-matter experts; develop data pipelines, ML models, and visualizations; track solution impact using attribution methodologies and manage technical communications in a knowledge management system.

As a Staff Software Engineer, you will enhance replication support for Cloudera Data Platform, mentor junior engineers, and build robust replication systems.

Build and maintain hardened Ubuntu-based container images and the automated CI/CD pipelines to build, test, scan, sign, publish, and retire them. Integrate upstream open-source projects, ensure security and cloud-native compatibility, collaborate with cross-functional teams, document and share knowledge, mentor colleagues, and contribute to hiring. Work in a distributed agile environment with occasional travel.

Build and scale a blockchain data platform handling petabytes of on-chain data. Design and implement distributed systems, data ingestion/decoding pipelines, and performant SQL processing. Write production code (Kotlin, Go, Java, Rust), improve developer experience, automate operations (including AI-driven automation), and own platform components.

The role involves designing and implementing cloud-native Java applications, conducting code reviews, mentoring juniors, and collaborating with teams for project delivery.

Develop and optimize algorithms for battery and renewable energy projects, analyze market data trends, and ensure algorithm performance.

As a Backend Software Engineer, you'll design scalable backend systems, optimize database performance, and collaborate with front-end and DevOps teams.

Design, build, and own DevOps and infrastructure for greenfield internal tools and backend services. Implement CI/CD, IaC, containerization, observability, automated deployments, and secure networking while collaborating with backend and frontend teams and internal sysadmins.

As a Senior Java Software Engineer, you will enhance software systems used in financial strategies, focusing on performance, scalability, and reliability.

Build, modernize, and maintain secure, scalable backend microservices in C#/.NET Core on AWS. Contribute to Angular front-end features, participate in code reviews and testing, improve legacy systems, use AI-assisted tools responsibly, and collaborate with Product, DevOps, and QA to deliver reliable SaaS solutions.

Contribute to Juju's development, collaborate with teams on distributed systems, debug issues, and enhance cloud automation features.

Build ML prototypes and data pipelines, collaborate with researchers and product engineering to integrate models into Fusion, containerize and deploy applications, implement best practices, and document architectures to accelerate research-to-production workflows.

Build backend features for Reconciliation and Global Accounts, improve merchants' reporting dashboards, deploy and monitor production code, and ensure high correctness for financial data under PCI/GDPR constraints.

Software Engineers at QuantCo will design and develop scalable solutions, integrate models into client businesses, and improve products based on client feedback.