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Denis Fomichev

@denisfomichev

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Senior software engineer specializing in high-availability integrations and scalable backend systems.

Portugal

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What I'm looking for

I am seeking a role building scalable, reliable backend/integration systems where I can lead technical efforts, mentor engineers, and deliver measurable product and operational improvements.

I am a senior software engineer with extensive experience designing and building high-availability, high-load integration and microservice platforms for telecom and e-commerce environments. I have led small teams, mentored colleagues, and been responsible for end-to-end delivery of integration/migration solutions connecting systems such as NMS, SAP, CRM, ERP and cloud services using Java, Kotlin, Spring, Kafka and various databases.

My work includes development of internal products for notification management, migration of databases to cloud-managed services, and creating monitoring and production-support processes. I focus on pragmatic architecture, code quality through reviews and testing, and delivering measurable business value through reliable, scalable systems.

Experience

Work history, roles, and key accomplishments

Current

IT Developer

Current

DSV

May 2024 - Present (1 year 9 months)

Development of integration services and internal
systems to increase company profit.

Building new services from scratch.
Helping to design a project, finding edge
cases.
Used technological stack: Java 21, Spring
Framework, Spring Boot, Apache Kafka,
KStreams, MondoDB, Azure, PostgreSQL.
Code review of teammate

Java 21+Spring Boot Apache Kafka MongoDB Azure Pl SQL REST SOAP

Senior Software Engineer

Ecwid by LightSpeed

Aug 2022 - Dec 2023 (1 year 4 months)

Developed and scaled a high‑load, high‑availability microservice platform for creating online stores used by millions of merchants; implemented core features and resolved legacy issues to improve reliability and performance.

Kotlin Spring Framework PostgreSQL AWS Microservices Apache SOLR MongoDB

Software Engineer

Netcracker Technologies

Feb 2019 - Jul 2022 (3 years 5 months)

Developed Netcracker notification management product and participated in design and implementation of high‑availability, horizontally scalable systems; led DB migration from Apache Cassandra to Amazon Keyspaces.

Java 8 Kotlin Apache Kafka Cassandra Keyspaces Docker Kubernetes Pl SQL

Junior Software Engineer

Netcracker

Jul 2017 - Feb 2019 (1 year 7 months)

Contributed to integrations and application‑level ETL between platform and third‑party vendors (WFM, SAP, NMS) and implemented features to support merchant platform functionality.

Java 8 Spring Framework Pl SQL JavaScript ETL Integration