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Back-End Software Engineer specialising in reliable, data-heavy systems with a strong focus on concurrency control, parallel processing, and system resilience. Experienced in designing worker-based background job pipelines, batching and streaming large workloads, and building idempotent workflows with safe retry semantics. Proven record of reducing Elasticsearch reindexing time by over 90% and delivering fault-tolerant bulk processing and reporting systems. Primary experience in ColdFusion Lucee and Java with PostgreSQL, MongoDB, and Elasticsearch.…Back-End Software Engineer specialising in reliable, data-heavy systems with a strong focus on concurrency control, parallel processing, and system resilience. Experienced in designing worker-based background job pipelines, batching and streaming large workloads, and building idempotent workflows with safe retry semantics. Proven record of reducing Elasticsearch reindexing time by over 90% and delivering fault-tolerant bulk processing and reporting systems. Primary experience in ColdFusion Lucee and Java with PostgreSQL, MongoDB, and Elasticsearch.

Antreas Christodoulou

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Back-End Software Engineer specialising in reliable, data-heavy systems with a strong focus on concurrency control, parallel processing, and system resilience. Experienced in designing worker-based background job pipelines, batching and streaming large workloads, and building idempotent workflows with safe retry semantics. Proven record of reducing Elasticsearch reindexing time by over 90% and delivering fault-tolerant bulk processing and reporting systems. Primary experience in ColdFusion Lucee and Java with PostgreSQL, MongoDB, and Elasticsearch.…Back-End Software Engineer specialising in reliable, data-heavy systems with a strong focus on concurrency control, parallel processing, and system resilience. Experienced in designing worker-based background job pipelines, batching and streaming large workloads, and building idempotent workflows with safe retry semantics. Proven record of reducing Elasticsearch reindexing time by over 90% and delivering fault-tolerant bulk processing and reporting systems. Primary experience in ColdFusion Lucee and Java with PostgreSQL, MongoDB, and Elasticsearch.

Available to hire

Back-End Software Engineer specialising in reliable, data-heavy systems with a strong focus on concurrency control, parallel processing, and system resilience. Experienced in designing worker-based background job pipelines, batching and streaming large workloads, and building idempotent workflows with safe retry semantics. Proven record of reducing Elasticsearch reindexing time by over 90% and delivering fault-tolerant bulk processing and reporting systems. Primary experience in ColdFusion Lucee and Java with PostgreSQL, MongoDB, and Elasticsearch.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Software Engineer (Back-End Focus) at CRM / CMS Platform

July 1, 2023 - Present

Reduced Elasticsearch reindexing time by 90% (from ~10 hours to ~40–50 minutes) through batched, parallel processing, streaming, and removing metadata from the hot path. Designed and maintained Elasticsearch indexes, analyzers, aggregations, and reindexing pipelines for search and analytics. Built worker-based background job systems with queued and parallel execution for large-scale workloads, with idempotent operations, locking, exponential backoff, and robust retry strategies. Developed a Bulk Actions Manager featuring parallel item processing, persistent state, resume/retry support, continue-on-error behavior, and detailed error reporting. Implemented a CalDAV-based calendar synchronization engine enabling cross-account event syncing. Enhanced observability via structured logging and job-level status tracking; designed a generic reporting framework for multi-section reports. Contributed backend APIs and data-access layers with a focus on performance, and supported a lightweight in