Ciklum is looking for a Senior Java Engineer to join our team full-time in Ukraine. We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live. About the role: As a Senior Java Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. ou will drive the migration off Salesforce as a system of record for several core domains into purpose-built Java microservices backed by PostgreSQL. You own the data side of that migration end-to-end extraction, target-side modelling, the migration pipeline, and the parallel-run reconciliation that proves the migration is correct before cutover. Responsibilities: Inventory the Salesforce data footprint relevant to each bounded context — objects, fields, relationships, automations, validation rules. Document what has to come out and what stays behind Design PostgreSQL target schemas that match the new microservices bounded contexts — not the legacy Salesforce shape Build the migration pipeline — extract via Salesforce Bulk API, transform, load, and verify. Idempotent, restartable, observable Run parallel-run reconciliation: the new system and Salesforce are both writing for a defined window, and you prove they agree before cutover Own data-quality gates and rollback playbooks. Cutover is a non-event because you've already proven the data is right Partner with the backend engineers on the contracts at the boundary — data ownership, eventual consistency, and idempotency Build the dashboards that show migration progress and reconciliation health to leadership Requirements: Backend & Data: Java 21, Spring Boot 3, and PostgreSQL Cloud & Infrastructure: AWS cloud-native environments (including VPCs, IAM, ECS/EKS, RDS, SNS/SQS, EventBridge) and GitHub Actions for CI/CD Async Messaging: Expertise in event flows and streaming using Kafka, RabbitMQ, or AWS SNS/SQS Observability: Built-in observability using OpenTelemetry, Datadog, and Grafana. This includes JSON-structured logging (never println), distributed tracing across service hops, and symptom-based alerting tied to Service Level Objectives (SLOs) AI Integration: Hands-on experience with AI agents, LangGraph, and multi-agent orchestration Language Skills: Upper-Intermediate (B2+) or Advanced (C1) level of English, with strong verbal and written communication skills What`s in it for you? Strong community: Work alongside top professionals in a friendly, open-door environment Growth focus: Take on large-scale projects with a global impact and expand your expertise Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies Flexibility: Enjoy radical flexibility – work remotely or from an office, your choice Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations About us: At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress. As one of Ukraine’s largest IT companies and a top employer recognized by Forbes, we’ve spent over 20 years delivering meaningful tech solutions. We proudly support diverse talent and military veterans, recognizing their unique skills and perspectives they bring to shaping the future. Explore, empower, engineer with Ciklum! Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum. #LI-NO1