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

• 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

• 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

• 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

• 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.

Senior Backend Engineer, Python – Core Gateway

• Develop scalable scrapers.
• Define resilient scraping strategies, unblock websites for scraping.
• Improve observability in the system.
• Develop back-end solutions for scraping & parsing problems of various magnitudes.
• Maintain the current system and develop new features related to scraping & parsing.

Web Scraping Engineer – Python, Mid/Senior

• Provide **technical leadership** across the engineering team.
• Review and approve **code**, requirements documentation, and integration documentation.
• Prepare **Solution Design** documents and contribute as a hands-on development team member.
• Design and develop **microservices** using **Java 21** and **Spring Boot 3.x.**
• Implement and maintain **REST API** integrations and asynchronous messaging with **Kafka** or **RabbitMQ.**
• Manage database interactions with **SQL**, **MS SQL**, and/or **MySQL.**
• Deploy and operate services on **AWS**, including **ECS**, **VPC**, and **CloudWatch.**
• Implement and maintain **OAuth2** and **JWT** authentication and authorization flows.
• Maintain and improve **CI/CD** pipelines using **Bitbucket Pipelines.**

Payment Microservices Tech Lead, Java

• Design, develop, and maintain **Java**-based applications and services.
• Support development of enterprise solutions related to investment services and securities processes.
• Collaborate with cross-functional teams to refine and implement technical requirements.
• Troubleshoot and optimize application performance while ensuring code quality.
• Contribute to robust, scalable, and maintainable software systems.

• Create and build Python-based tools to normalize, cleanse, and standardize large-scale global vehicle data;
• Design, implement, and manage highly available backend services capable of scaling seamlessly across international markets.
• Write robust, efficient, and maintainable code in strict adherence to industry best practices..
• Participate in code reviews to ensure code quality and adherence to standards.

Senior Python Engineer

• Work alongside team members to implement new technologies and systems within the GovTech sector, using Java as the main back-end technology stack
• Contribute to the design and development of secure, scalable, and efficient solutions for public-sector digital transformation
• Collaborate with your team and clients to identify the right technical approaches and deliver impactful results
• Ensure code quality, performance, and reliability across the system architecture
• Act as a trustworthy and proactive team player, communicating risks, challenges, and improvements early
• Take part in R&D initiatives, exploring innovative tools and methods to enhance existing systems
• Participate in code reviews, architecture discussions, and continuous improvement efforts
• Support and mentor junior colleagues, helping them grow technically and professionally

Senior Software Engineer, Java

• Develop and maintain backend services using Golang
• Support migration activities for a growing SaaS product
• Build scalable, reliable, and maintainable backend solutions
• Collaborate with cross-functional teams to refine and deliver technical requirements
• Contribute to a flexible delivery setup as project needs evolve
• Participate in technical discussions and interviews where needed to ensure strong team fit

Backend Engineer, Golang

• Design, develop, and maintain Java-based applications and services
• Support development of enterprise solutions related to investment services and securities processes
• Collaborate with cross-functional teams to refine and implement technical requirements
• Troubleshoot and optimize application performance while ensuring code quality
• Contribute to robust, scalable, and maintainable software systems

Java Developer

• You will be a member of an agile engineering team, working on strategic projects including helping to build API-first services that form part of a new target architecture.
• You will have the opportunity to contribute towards building and scaling customer products and services, collaborating with other Engineering and Mobile, DevOps and Data teams.
• You'll engage with cutting edge technologies and utilize CI/CD pipelines built with Terraform and Kubernetes on GCP.
• You'll navigate complex challenges and drive development process improvements, working with your team to achieve common objectives.

Scala Software Engineer

• Work on robust back-end solutions, ensuring scalability and security
• Deliver high-quality code solutions and make decisions on the architecture
• Write clean, efficient, and well-tested code while adhering to best practices
• Understand the functionalities being developed, both from business and technical perspectives
• Participate in technical decisions by providing alternatives, specific opinions, as well as reasoning behind those
• Collaborate closely with cross-functional teams to ensure alignment between business objectives and technical implementations

Backend Engineer jobs in Lithuania

See all jobs on JobTailor

Senior Java Developer

Senior Full-Stack Engineer, Python, React

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

Back-End Engineer, Java

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

Backend Engineer II

Senior Python Backend Developer

Senior Backend Developer – File Processing

Senior Backend Developer – Services

Python Backend Developer, File Processing

Senior Backend Engineer, Python – Core Gateway

Web Scraping Engineer – Python, Mid/Senior

Payment Microservices Tech Lead, Java

Senior Java Developer

Senior Python Engineer

Senior Software Engineer, Java

Backend Engineer, Golang

Java Developer

Scala Software Engineer

Back-end Developer – Mid/Senior