Backend Engineer

• Design and develop scalable backend solutions using Java
• Work with microservices architecture and contribute to technical solution design
• Build, maintain, and optimise REST APIs and backend systems
• Support delivery through CI/CD pipelines and modern engineering practices
• Work with containerised environments using Docker and Kubernetes
• Apply software security principles and development best practices
• Collaborate with team members and stakeholders in a long-term project setup

Senior Java Developer

• Design, build, and operate the backend systems that power the Investigation Agent.
• Build the frontend surface that makes the agent's work legible.
• Own features end-to-end.
• Make the agent reliable.
• Partner closely with Product/UX, Data Science, and Engineering.
• Champion an AI-native engineering workflow.
• Help establish engineering best practices for agentic products at Hawk.

Senior Full-Stack Engineer, Python, React

Android Engineer

• Develop and maintain Android applications using Kotlin and Java
• Work with RESTful APIs, networking, and XML / JSON data formats
• Build modern UI components using Jetpack Compose
• Implement reactive and asynchronous patterns using Coroutines, Flow, ViewModel, and LiveData
• Apply architectural patterns including MVVM, MVI, and Clean Architecture
• Integrate APIs using Retrofit and OkHttp
• Implement dependency injection using Hilt or Dagger and apply modularization principles
• Write and maintain unit tests (JUnit, MockK) and UI tests
• Ensure solutions meet high standards of performance, security, and user experience
• Maintain high code quality and contribute to knowledge sharing within the team
• Manage source code and collaborate using Git

Android Developer

Full-stack Engineer

• Design, develop, and maintain full-stack applications using Java and Angular.
• Deliver new features and enhancements for enterprise applications following agile methodologies.
• Develop and integrate RESTful APIs and event-driven solutions using Kafka.
• Design, optimize, and maintain PostgreSQL databases and write PL/SQL where required.
• Collaborate with cross-functional teams to translate business requirements into technical solutions.
• Write clean, maintainable, and well-tested code following engineering best practices.
• Participate in code reviews, technical discussions, and architectural improvements.
• Contribute to CI/CD pipelines and engineering enablement initiatives.
• Support application performance optimization, reliability, and scalability.
• Stay up to date with modern development practices and emerging technologies.

Full Stack Engineer

• Lead the design, development, and delivery of enterprise-grade applications using Java and Angular.
• Drive continuous product development, feature enhancements, and technical improvements across multiple applications.
• Design and implement scalable integrations between internal and external systems.
• Lead application refactoring and modernization initiatives to improve performance, maintainability, and scalability.
• Develop and maintain backend services, APIs, and frontend components.
• Support the implementation of event-driven solutions and messaging-based architectures using Kafka.
• Analyze, troubleshoot, and resolve complex production and application issues.
• Collaborate with architects, product owners, and stakeholders to define technical solutions and roadmaps.
• Mentor development teams, conduct code reviews, and promote engineering best practices.
• Contribute to architectural decisions and ensure alignment with enterprise standards.
• Participate in Agile ceremonies and support the delivery of high-quality software throughout the SDLC.
• Ensure code quality, security, reliability, and performance through testing and continuous improvement practices.

Senior Full-Stack Engineer – Tech Lead, Java/Angular

• Design, develop, and maintain backend services and integration solutions using Java.
• Implement and support REST-based APIs and event-driven integrations using Kafka.
• Contribute to the development of new product modules and enhancements within existing platforms.
• Participate in the integration of enterprise applications and business-critical systems.
• Develop and optimize database components, including SQL and PL/SQL procedures.
• Support SCP Cluster-related development and implementation activities.
• Analyze, troubleshoot, and resolve application and integration issues.
• Collaborate with cross-functional teams to define, develop, and deliver technical solutions.
• Contribute to application modernization initiatives and the adoption of modern technologies.
• Ensure high standards of code quality, performance, and maintainability.

Back-End Engineer, Java

• Play a key role in the Forms team, influencing product development decisions.
• Build a product that enables merchants to capture, convert, and grow their audience through signup forms, popups, and multi-step flyouts.
• Build the systems behind AI-powered form creation and AI-driven recommendations for merchants.
• Use your technical expertise to solve complex problems.
• Leverage AI to streamline your daily operations.

Senior Software Engineer, Forms Team

Frontend Engineer

• Build high-performance TV and web applications using React and TypeScript in a demanding, large-scale streaming environment:
• Develop scalable applications for the Telia Play platform across TV environments (Samsung, LG, Android)
• Create fast, intuitive, and visually polished user interfaces optimized for media consumption
• Collaborate with cross-functional teams to deliver responsive and reliable streaming experiences
• Optimize performance for high-load, cross-platform TV applications and continuously improve existing solutions

React Developer

• Build high-performance TV and web applications using React and TypeScript in a demanding, large-scale streaming environment
• Lead and manage team of React developers: coaching, 1-to-1s, implementing best practices
• Run regular 1:1s, provide actionable feedback, and support career development to help engineers reach their full potential
• Drive effective delegation and task distribution, ensuring balanced workloads and avoiding knowledge silos or bottlenecks
• Develop scalable applications for the Telia Play platform across TV environments (Samsung, LG, Android)
• Create fast, intuitive, and visually polished user interfaces optimized for media consumption
• Collaborate with cross-functional teams to deliver responsive and reliable streaming experiences
• Optimize performance for high-load, cross-platform TV applications and continuously improve existing solutions

Lead React Developer

• Work on core Linux kernel subsystems — including memory management, scheduling, networking, and filesystems.
• Tweak and tune container isolation mechanisms until they’re practically airtight.
• Help Linux scale harder, faster, stronger.
• Optimize resource usage across thousands of virtual machines and containers.
• Collaborate with upstream maintainers to merge your patches into the kernel.
• Representing Virtuozzo at professional conferences, such as Open Source Summit, FOSDEM, and other Linux Foundation events.

C Developer – Linux Kernel Team

• Design, develop, and maintain back-end services and RESTful APIs using Node.js and TypeScript.
• Build and optimize API endpoints for client-facing products.
• Work with PostgreSQL databases and Prisma ORM – schema design, query optimization, migrations.
• Develop and maintain integrations with third-party services (payment systems, email services, CRM).
• Develop and support front-end features using React.js and Next.js.
• Leverage AI tools and contribute to integrating AI-powered features into products.
• Collaborate with Product Managers and Design team to plan and refine requirements for new features.
• Take ownership of delivering features through all development phases, including code review, QA, and production.
• Monitor alert systems and respond proactively to errors or incidents.
• Proactively research and introduce new tools, technologies, and solutions to enhance our tech stack.
• Share knowledge, insights, and best practices with fellow team members to foster a collaborative environment.
• Participate in creating well-thought-out technical plans for feature implementation.

Full Stack Engineer – Backend Focused, Node.js, React

• help shape the future of Telia Play by building high‑performing Android experiences used by millions across the Nordics
• develop, enhance, and maintain Telia Play for Android devices, with a strong focus on Android TV
• design and optimize applications for performance, scalability, automation, and smooth release flows
• collaborate closely within a cross‑functional team, working with designers and backend developers to implement modern architectural patterns and coding standards
• build with a modern Kotlin-based tech stack using Jetpack Compose, our design system, Firebase, and GraphQL
• create exceptional user experiences that delight and engage our customers

• Develop and evolve customer information management and data aggregation capabilities using data from internal systems and external registries
• Design, implement, and maintain scalable backend services using Java Spring, with event-driven integrations leveraging Kafka
• Define and implement microservices architecture and API integration strategies, aligned with TM Forum specifications
• Lead database design, performance tuning, and optimization using Hibernate and PostgreSQL
• Collaborate with cross-functional teams across Telia’s BSS landscape to align technical solutions with business objectives
• Provide technical guidance, promote best practices, and perform code reviews to ensure high-quality deliverables
• Ensure compliance with security, reliability, and operational standards throughout the software development lifecycle
• Coordinate cross-team project activities and perform system maintenance to ensure continuous service reliability

Software Engineer

• Build and maintain backend services, APIs, webhooks and integration services.
• Develop secure, scalable foundations for multi-tenant education products.
• Build and improve integrations with learning platforms, third-party services, AI providers and internal systems.
• Design reliable data flows for assessment, feedback, learner activity, reporting and operational workflows.
• Build and maintain authentication, authorisation, permissions and audit capabilities appropriate for education products.
• Work with PostgreSQL, BigQuery and modern cloud application infrastructure.
• Build and deploy containerised services in cloud environments.
• Improve reliability, observability, performance and maintainability across backend systems.
• Investigate production issues, identify root causes and implement durable fixes.
• Work closely with Product and AI Engineers to turn product needs into scalable technical systems.
• Engage with education partners where useful to understand real workflows and improve integrations.
• Use AI-assisted development tools appropriately while maintaining strong standards for testing, security and code quality.
• Write clean, tested and maintainable code.

Backend Engineer II

• Build education products and product features from early concept through to production.
• Work directly with teachers, technical teams and education partners to understand workflows, pain points and priorities.
• Turn complex or incomplete requirements into clear, practical and usable product solutions.
• Design and build product experiences that integrate naturally with learning platforms and education systems.
• Work across frontend, backend, APIs, integrations and data models where needed.
• Build prototypes quickly, test them with users and turn successful concepts into reliable, maintainable products.
• Work closely with Backend and AI Engineers to make technical and AI capabilities genuinely useful in real education workflows.
• Improve usability, reliability, performance and product quality through active iteration.
• Investigate issues independently, identify the underlying problem and drive practical improvements.
• Use AI-assisted development tools where appropriate to accelerate delivery while maintaining strong engineering judgement and product quality.
• Write clean, tested and maintainable code.

Product Engineer

• Design and implement scalable Python microservices in a distributed architecture.
• Build and optimize high-performance backend systems, ensuring scalability and reliability under high load.
• Integrate and manage third-party APIs and external services.
• Collaborate with cross-functional teams to define technical solutions and system design approaches.
• Work with AWS services (e.g. Lambda, cloud infrastructure) to architect and deploy solutions.
• Improve and maintain CI/CD pipelines and deployment processes in collaboration with DevOps.
• Lead and contribute to code reviews, ensuring high engineering standards.
• Identify system bottlenecks and drive performance and scalability improvements.
• Troubleshoot complex production issues in distributed systems.
• Contribute to technical discussions and guide best practices within the team.

Senior Python Backend Developer

• Migrate and re-architect legacy Perl batch jobs and crontab pipelines into modern Python-based services.
• Design and implement orchestration using Prefect or Airflow, including alerting, observability dashboards, and safe job re-run capabilities.
• Instrument services with structured logging and metrics (CloudWatch, or Grafana) to eliminate the need for direct production server access.
• Manage the data layer for file ingestion: landing raw scheme files to S3, parsing/transforming them, and persisting to PostgreSQL or RDS for reconciliation.
• Process and reconcile payment scheme files (clearing, settlement, chargebacks) from card schemes and acquirers.
• Contribute to architecture decisions, write technical documentation, and establish best practices across the team.

Senior Backend Developer – File Processing

• Design, build, and maintain high-performance Python microservices (FastAPI, AsyncIO)
• Analyze legacy systems and extract business logic into modern architectures
• Refactor and migrate existing modules into clean, scalable, and maintainable services
• Ensure system reliability through idempotency, fault tolerance, and robust error handling
• Design and integrate external APIs, handling edge cases, retries, and failures
• Implement and manage webhooks, callbacks, and complex retry mechanisms
• Write high-quality unit and integration tests
• Collaborate with cross-functional teams to ensure service stability and performance
• Contribute to architectural discussions and continuous system improvements
• Take ownership of services end-to-end, from design to production

Senior Backend Developer – Services

• System Implementation: Support the re-architecture of legacy Perl batch jobs into modern, maintainable Python services.
• Operational Reliability: Assist in implementing workflow orchestration (Prefect/Airflow) to ensure safe job re-runs and system stability.
• Observability: Help instrument our services with logging and alerting (Grafana/CloudWatch) so we can monitor systems without direct production access.
• Data Transformation: Work on data ingestion pipelines, moving raw data to S3 and transforming it into relational database records.
• Collaboration: Participate in agile sprints and maintain clear English communication with the team and stakeholders.

Python Backend Developer, File Processing

• Dual-Track Maintenance: Support and extend the existing Perl-based payment gateway debugging production issues and adding features while the migration is ongoing.
• Modernization: Design, develop, and maintain modern server-side components in Python, ensuring high performance and scalability.
• Integrations: Integrate third-party APIs and external payment services into both legacy and modern platform layers.
• Agile Collaboration: Maintain clean and strong English communication to effectively collaborate with multiple stakeholders across departments working in agile sprints.
• Product Thinking: Go beyond the "what" and "how" of the code bring a product-focused mindset to understand the business logic and user impact of what you build.
• Engineering Standards: Participate in code reviews, uphold high code quality standards, and contribute to a culture of continuous improvement.
• Infrastructure: Work closely with DevOps on CI/CD pipelines, containerization, and cloud deployments.

Software Engineer jobs in Lithuania

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Senior Java Developer

Senior Full-Stack Engineer, Python, React

Android Developer

Full Stack Engineer

Senior Full-Stack Engineer – Tech Lead, Java/Angular

Back-End Engineer, Java

Senior Software Engineer, Forms Team

React Developer

Lead React Developer

C Developer – Linux Kernel Team

Full Stack Engineer – Backend Focused, Node.js, React

Android Developer

Software Engineer

Backend Engineer II

Product Engineer

Senior Python Backend Developer

Senior Backend Developer – File Processing

Senior Backend Developer – Services

Python Backend Developer, File Processing

Senior Backend Engineer, Python – Core Gateway