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Java Backend Engineer with 3 years of commercial experience delivering Spring Boot and Guidewire-based backend systems for insurance and SaaS products. Strong in REST/SOAP integrations, PostgreSQL, Redis, Kafka, testing, and cloud/containerized delivery. Experienced in policy administration, underwriting features, secure API design, and large-scale data migration. Builds reliable microservices with Spring Security (OAuth2/JWT), event-driven architecture, and comprehensive unit/integration test coverage to stabilize releases.…Java Backend Engineer with 3 years of commercial experience delivering Spring Boot and Guidewire-based backend systems for insurance and SaaS products. Strong in REST/SOAP integrations, PostgreSQL, Redis, Kafka, testing, and cloud/containerized delivery. Experienced in policy administration, underwriting features, secure API design, and large-scale data migration. Builds reliable microservices with Spring Security (OAuth2/JWT), event-driven architecture, and comprehensive unit/integration test coverage to stabilize releases.

Ihnat Baikou

Back-End Developer, Software Engineer, Programmer, +4

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Java Backend Engineer with 3 years of commercial experience delivering Spring Boot and Guidewire-based backend systems for insurance and SaaS products. Strong in REST/SOAP integrations, PostgreSQL, Redis, Kafka, testing, and cloud/containerized delivery. Experienced in policy administration, underwriting features, secure API design, and large-scale data migration. Builds reliable microservices with Spring Security (OAuth2/JWT), event-driven architecture, and comprehensive unit/integration test coverage to stabilize releases.…Java Backend Engineer with 3 years of commercial experience delivering Spring Boot and Guidewire-based backend systems for insurance and SaaS products. Strong in REST/SOAP integrations, PostgreSQL, Redis, Kafka, testing, and cloud/containerized delivery. Experienced in policy administration, underwriting features, secure API design, and large-scale data migration. Builds reliable microservices with Spring Security (OAuth2/JWT), event-driven architecture, and comprehensive unit/integration test coverage to stabilize releases.

Available to hire

Java Backend Engineer with 3 years of commercial experience delivering Spring Boot and Guidewire-based backend systems for insurance and SaaS products. Strong in REST/SOAP integrations, PostgreSQL, Redis, Kafka, testing, and cloud/containerized delivery.

Experienced in policy administration, underwriting features, secure API design, and large-scale data migration. Builds reliable microservices with Spring Security (OAuth2/JWT), event-driven architecture, and comprehensive unit/integration test coverage to stabilize releases.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Beginner

Language

English

Fluent

Polish

Fluent

Russian

Fluent

Work Experience

Software Developer (Java/Gosu) at SollerS Consulting

April 1, 2025 - Present

Developed policy administration and underwriting features on Guidewire PolicyCenter for an international P&C insurer, using Java and Gosu within a distributed Agile/Scrum team. Built REST and SOAP integrations connecting the policy core to rating, document generation, and payment systems to ensure reliable data exchange. Implemented data migration and mapping logic transferring policy and party records from legacy systems into the new core, including validation rules to preserve data integrity at scale. Wrote automated unit and integration tests for policy rules and integrations using JUnit and GUnit to stabilize releases and reduce regression defects.

Junior Java Developer at Matseboss Solutions

December 1, 2023 - February 28, 2025

Built a containerized Spring Boot backend from scratch, delivering PostgreSQL schemas, Flyway migrations, API key authentication, and structured request logging for production use. Implemented a currency exchange service with scheduled external rate synchronization, Redis caching, and fallback strategies to maintain calculation consistency during upstream outages. Standardized API response and exception handling across the service to improve HTTP status correctness and error consistency. Delivered unit and integration tests using SpringBootTest and MockMvc for authentication, caching behavior, and critical API paths.

Java Developer Intern at eGodziny

May 1, 2023 - November 30, 2023

Optimized SQL queries and database indexes on high-traffic operational endpoints, reducing average API response time by 23% and improving throughput across an HR SaaS platform. Redesigned logging for centralized log aggregation and faster event correlation during incident triage. Contributed to an HR automation SaaS product supporting time tracking, workforce monitoring, and operational coordination for temporary employment agencies.