Alexander Kapincev - Senior Fullstack Developer

Q: Where is Alexander based?

Alexander is based in Darmstadt, Germany and prefers 100% remote projects.

Q: What languages does Alexander speak?

Alexander speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Alexander have?

Alexander has at least 8 years of experience. During this time, Alexander has worked in at least 2 different roles and for 8 different companies . The average length of individual experience is 1 year and 11 months . Note that Alexander may not have shared all experience and actually has more experience.

Q: What is Alexander's latest experience?

Alexander's most recent position is Senior Fullstack Developer at Deutsche Vermögensberatung AG (DVAG) .

Q: What companies has Alexander worked for in recent years?

In recent years, Alexander has worked for Deutsche Vermögensberatung AG (DVAG) , Fraunhofer-Institut für Experimentelles Software Engineering IESE , Techem X GmbH , DG Verlag / DGNexolution , and DB Regio Bus .

Q: Which industries is Alexander most experienced in?

Alexander is most experienced in industries like Banking and Finance , Information Technology (IT) , and Insurance . Alexander also has some experience in Energy , Telecommunication , and Transportation and Logistics .

Q: Which business areas is Alexander most experienced in?

Alexander is most experienced in business areas like Information Technology (IT) , Product Development , and Accounting . Alexander also has some experience in Research and Development (R&D) and Customer Service .

Q: Which industries has Alexander worked in recently?

Alexander has recently worked in industries like Banking and Finance , Information Technology (IT) , and Insurance .

Q: Which business areas has Alexander worked in recently?

Alexander has recently worked in business areas like Information Technology (IT) , Product Development , and Accounting .

Recommended expert

Darmstadt, Germany

Experience

Sep 2024 - Present

1 year 7 months

Senior Fullstack Developer

Deutsche Vermögensberatung AG (DVAG)

Further development and maintenance of a complex sales platform focused on digital closing processes, customer portal interactions, and document generation for financial and insurance products
Development and maintenance of microservices with Spring Boot 3 and Kotlin
Frontend development with Angular 20 to display products, applications, and documents
Conducting end-to-end tests with Playwright and integration tests with WireMock
Creating and optimizing Quartz jobs and CronJobs
Refactoring the security configuration in a multi-realm Keycloak setup with custom FilterChain, permission evaluator, and factory routing
Creating dynamic emails with Thymeleaf
Extensive error analysis with Application Insights, Log Analytics, and direct SQL debugging
Introducing a dynamically controllable security architecture with flexible token processing based on path and realm
Stabilizing and clearly structuring the closing process for complex product models
Significantly increased maintainability and readability of code through modular refactorings
Improved test stability and depth by combining Playwright, WireMock, and integration tests
Targeted performance optimization through analysis of Hibernate statistics, query tuning, and use of SQL execution plans
Technologies used: Java 21, Kotlin, Spring Boot 3, Angular, TypeScript, REST API, JSON, Kubernetes, Docker, PostgreSQL, Liquibase, Keycloak, OAuth2, GitHub Actions, Testcontainers, Azure Application Insights, Thymeleaf, Tilt, Microsoft SQL Server

Oct 2023 - Sep 2024

1 year

Senior Fullstack Developer

Fraunhofer-Institut für Experimentelles Software Engineering IESE

Development of a digital platform in the BMEL-funded project "Smarte.Land.Regionen" to promote digitization in rural areas
Implementation of microservices with Spring Boot 2/3 and Java 19
Extensive frontend development with React including creating and extending numerous components
Integration of a payment service provider (Secupay) and full automation of payment processing
Migration of existing systems to newer versions and restructuring of the database schema using Liquibase
Creation and implementation of user stories
Significant improvement of the user interface and user experience through custom React components
Successful migration from Spring Boot 2 to 3 and increased test coverage with Testcontainers
Contribution to improving platform efficiency and user satisfaction
Technologies used: Java 19, Spring Boot 2/3, React, TypeScript, JavaScript, REST API, JSON, Kubernetes, Docker, PostgreSQL, Liquibase, Keycloak, GitLab CI, Testcontainers, GreenMail, Thymeleaf

Jul 2022 - Sep 2023

1 year 3 months

Senior Fullstack Developer

Techem X GmbH

Revolutionizing the private customer business with fully digital solutions for heating cost billing and smoke detector management
Designing and developing cloud-native backend systems on the Azure platform
Implementing microservices with Spring Boot 3 and Java 17/19
Integrating various third-party systems (Heiztec, Ortec, SAP, Microsoft Calendar, CRM)
Developing GraphQL interfaces and Kubernetes configurations
Designing and implementing complex business logic for billing and device management processes
Implementing Azure Functions
Contributing to frontend development with React
Successfully digitizing and automating the customer acquisition process
Migrating the entire system to Kubernetes for improved scalability and maintainability
Technologies used: Java 17/19, Spring Boot 2/3, Azure Cloud, Terraform, Docker, Kubernetes, Helm, Grafana, PostgreSQL, Cosmos DB, MS SQL, Drools (BRMS), GraphQL, React, GitLab CI, Testcontainers, SOAP, XML, WSDL, REST API, Application Insights

Jul 2021 - Jul 2022

1 year 1 month

Senior Fullstack Developer

DG Verlag / DGNexolution

Further development of an e-accounting tool for cooperative banks to generate and process electronic invoice data online
Development of an MVP for a sustainability portal to support sustainable businesses
Implementing new features and requirements in the e-accounting tool and introducing a new invoice data format for Atruvia
Backend development with Spring Boot 2 and Java 11/Kotlin, frontend development with Angular 13
Developing Magnolia CMS apps, REST endpoints, and light modules
Integrating Hibernate Search and Lucene and implementing security measures with Spring ACL
Database design and optimization with PostgreSQL and Ltree
Successful rollout of the new invoice data format and production launch of the MVP
Technologies used: Java 11, Kotlin, Spring Boot 2, TypeScript, Angular 13, Docker, Kubernetes, Spring ACL, PostgreSQL, Hibernate Search, Lucene, Magnolia, REST API, JSON

Apr 2021 - Jun 2021

3 months

Fullstack Developer

DB Regio Bus

Further development of a cloud-based data lake and integration platform for digital transformation
Analyzing and assessing data quality and transformations for data cleansing
Designing and implementing a Java-based microservice for CSV and XML processing
Adapting and optimizing existing Python and Groovy modules
Developing a Groovy script to automate user imports into the Tenfold system
Integrating security measures with Keycloak and containerization with Docker
Successful implementation and production deployment of the Java microservice and automation of user imports
Technologies used: Java 8, Spring Boot 2, Python, Groovy, JavaScript, Linux shell, Keycloak, Docker, Tenfold, SOAP, REST API, XML, JSON

Dec 2019 - Mar 2021

1 year 4 months

Fullstack Developer

Unzer GmbH

Modernization and automation of data import processes for the standard debtor management and billing system
Designed the software architecture for the new import solution
Developed microservices with Java and Spring Boot 2 and implemented complex business logic
Set up and optimized CI/CD pipelines with GitLab CI and Jenkins
Integrated Keycloak using OpenID Connect and implemented message queue-based communication with ActiveMQ and Kafka
Automated merchant data imports and deployed to AWS Cloud
Significantly reduced manual interventions and improved scalability and data security
Technologies used: Java 11, Spring Boot 2, Spring Cloud Config, AWS (SQS, SNS, DynamoDB), MariaDB, ActiveMQ, Apache Kafka, Maven, Keycloak, OAuth2, Testcontainers, Docker, Kubernetes, GitLab CI, Jenkins, REST API, JSON

Mar 2019 - Dec 2019

10 months

Fullstack Developer

Unzer GmbH

Developed the Merchant Onboarding Service Hub (MOSH) to automate the merchant onboarding process
Backend development with Java and Spring Boot 2, frontend with Angular 8 and Bootstrap 4
Implemented complex business logic and modeling with Flowable
Integrated Keycloak using OpenID Connect
Set up and optimized CI/CD pipelines
Developed and integrated AWS services (DynamoDB, SQS, SNS, S3)
Launched the MVP in September 2020 for self-onboarding capability and continuously expanded the processes
Technologies used: Java 8, Spring Boot 2, Angular 8, Bootstrap 4, AWS (DynamoDB, SQS, SNS, S3), Elastic Beanstalk, Flowable, Keycloak, Docker, Kubernetes, Testcontainers, GitLab, Jenkins, SonarQube, Postman, REST API, JSON

Jan 2019 - Mar 2019

3 months

Fullstack Developer

Detim Consulting GmbH

Further developed a web application for managing employee data
Backend development with Java and Spring Boot 2, implementing complex business logic
Developed and optimized RESTful APIs
Frontend development with Angular 6 and responsive interfaces using HTML and SCSS
Integrated Keycloak using OAuth 2.0 and optimized the database with Hibernate
Implemented continuous integration and version control with Git and BitBucket
Improved the UI, made backend services more efficient, and increased security
Technologies used: Java 8, Spring Boot 2, Angular 6, Hibernate, Maven, HTML, SCSS, Keycloak, OAuth 2.0, Git, BitBucket, REST API, JSON

Feb 2018 - Dec 2018

11 months

Fullstack Developer

Deutsche Telekom

Enhanced and adapted the cBSI platform for automated business process integration in customer care & billing
Backend development with Java 7, Java EE, and implemented business logic
Developed and extended web services and frontends using JavaServer Faces and ICEfaces
Adapted and migrated C++ adapters to Java
Developed shell scripts for automatic processing of CSV files
Supported the rollout and deployment of new features
Successfully migrated C++ adapters, extended platform functionality, and improved integration
Technologies used: Java 7, Java EE, C++, JBoss, Hibernate, Oracle DB, JavaServer Faces, ICEfaces, HTML, CSS, JavaScript, Linux Shell, SED, Subversion, SOAP, XML, JSON, REST API

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Banking and Finance (4.5 years), Information Technology (2 years), Insurance (1.5 years), Energy (1 year), and Telecommunication (1 year).

Banking and Finance

Information Technology

Insurance

Energy

Telecommunication

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (8 years), Product Development (5 years), Research and Development (1 year), Accounting (1 year), and Customer Service (1 year).

Information Technology

Product Development

Research and Development

Accounting

Customer Service

Summary

As an experienced fullstack developer and cloud engineer, I bring a wide range of experience and skills in implementing distributed systems and cloud applications. My many years of expertise include developing microservices with Java and Spring Boot as well as integrating cloud technologies such as AWS and Azure.

My expertise covers the entire Java ecosystem, modern web development with Angular and React, as well as DevOps practices with Docker and Kubernetes. I have extensive knowledge in CI/CD, database design (relational and NoSQL), security implementations, and messaging systems.

Skills

Java Ecosystem: Java 8-24, Kotlin, Spring Boot 2+, Spring (Data, Cloud, Mvc, Security), Jpa/hibernate
Web Development: Angular, React, Typescript, Javascript, Html5, Css
Cloud & Devops: Aws, Azure, Docker, Kubernetes, Helm, Terraform
Ci/cd: Gitlab Ci, Github Actions, Jenkins, Maven, Gradle, Git
Agile Methods: Experience In Scrum/kanban Projects
Architecture And Planning: Knowledge In Architecture, Planning, Execution, Quality Assurance Of Complex Software Solutions.
Databases: Design And Construction Of Relational And Nosql Databases (Postgresql, Mysql, Mariadb, Oracledb, Dynamodb, Mongodb, Cosmosdb)
Programming Languages: Java 8-24, Typescript, Javascript, Kotlin, Python
Web And Frontend Development: Angular 2+, React, Html5, Bootstrap 4+, Css, Scss, Sass, Nodejs, Npm, Freemarker / Thymeleaf
Backend Development: Spring Boot 2+, Spring Data, Spring Cloud, Spring Security, Spring Acl, Jpa / Hibernate, Liquibase, Apache Pdfbox, Quartz
Devops: Docker, Terraform, Kubernetes (Helm, Kustomize), Linux Shell, Grafana, Prometheus, Tilt
Ci/cd: Gitlab Ci, Github Actions, Jenkins, Maven, Gradle, Git
Databases: Mysql, Mariadb, Oracle Db, Postgresql/postgis, Dynamodb, Mongodb, Cosmos Db, Azure Sql
Cloud Computing: Aws (S3, Cloudfront, Ecs, Ec2, Eb, Rds, Lambda), Azure (Azure Functions, Cosmos Db, Azure Blob Storage, Application Insights, Aks, Workbooks, Key Vault)
Security: Keycloak, Azure Ad, Json Web Token, Oauth 2.0, Openid Connect, Spring Acl
Communication: Rest Api, Graphql, Soap, Websocket, Activemq, Aws Sns/sqs, Azure Service Bus, Azure Event Grids, Kafka
Search Engine: Hibernate Search, Lucene
Test / Quality Management: Junit 5, Mockito, Wiremock, Playwright, Selenide, Selenium, Sonarqube, Openapi/swagger, Testcontainers
Tools / Standard Software: Intellij Idea, Atlassian Jira, Confluence, Openlens, Plantuml, Postman

Languages

German

Native

English

Advanced

Education

Oct 2016 - Sep 2018

Hochschule Darmstadt

M.Sc. in Computer Science · Computer Science · Darmstadt, Germany

Oct 2012 - Sep 2016

Hochschule Darmstadt

B.Sc. in Computer Science · Computer Science · Darmstadt, Germany

Certifications & licenses

Certified Kubernetes Application Developer

Terraform Certified Associate HOTAO-003

Profile

Created

September 2025

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Frequently asked questions

Do you have questions? Here you can find further information.

Where is Alexander based?

Alexander is based in Darmstadt, Germany and prefers 100% remote projects.

What languages does Alexander speak?

Alexander speaks the following languages: German (Native), English (Advanced).

How many years of experience does Alexander have?

Alexander has at least 8 years of experience. During this time, Alexander has worked in at least 2 different roles and for 8 different companies. The average length of individual experience is 1 year and 11 months. Note that Alexander may not have shared all experience and actually has more experience.

What roles would Alexander be best suited for?

Based on recent experience, Alexander would be well-suited for roles such as: Senior Fullstack Developer, Fullstack Developer.

What is Alexander's latest experience?

Alexander's most recent position is Senior Fullstack Developer at Deutsche Vermögensberatung AG (DVAG).

What companies has Alexander worked for in recent years?

In recent years, Alexander has worked for Deutsche Vermögensberatung AG (DVAG), Fraunhofer-Institut für Experimentelles Software Engineering IESE, Techem X GmbH, DG Verlag / DGNexolution, and DB Regio Bus.

Which industries is Alexander most experienced in?

Alexander is most experienced in industries like Banking and Finance, Information Technology (IT), and Insurance. Alexander also has some experience in Energy, Telecommunication, and Transportation and Logistics.

Which business areas is Alexander most experienced in?

Alexander is most experienced in business areas like Information Technology (IT), Product Development, and Accounting. Alexander also has some experience in Research and Development (R&D) and Customer Service.

Which industries has Alexander worked in recently?

Alexander has recently worked in industries like Banking and Finance, Information Technology (IT), and Insurance.

Which business areas has Alexander worked in recently?

Alexander has recently worked in business areas like Information Technology (IT), Product Development, and Accounting.

What is Alexander's education?

Alexander holds a Master in Computer Science from Hochschule Darmstadt and a Bachelor in Computer Science from Hochschule Darmstadt.

Does Alexander have any certificates?

Alexander has 2 certificates. These include: Certified Kubernetes Application Developer and Terraform Certified Associate HOTAO-003.

What is the availability of Alexander?

Alexander is immediately available for suitable projects.

What is the rate of Alexander?

Alexander's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.