Looking for a job

Stefan Ramač

@stefanrama

Message

Integration Engineer at A1 Telekom Austria Group, who cut API response times by 60–80%.

Serbia

Message

At A1 Telekom Austria Group - CompetenceDeliveryCenter (CDC), I own development and maintenance of OCC and Memphis, core systems serving 5M+ end users. I optimized API flows, reducing response times by approximately 60–80%, and am modernizing OCC into an independent service.

At Erste Banka Srbija, I led integration design and delivery oversight for banking systems, including Temenos T24 integrations with the bank's ESB. I also delivered the integration architecture for an online lending application.

I co-developed Thermowool ERP, taking ownership of its backend architecture and development. The platform went live in August 2025 and brings operational and employee data together for 150+ daily users.

Experience

Work history, roles, and key accomplishments

Current

DevOps Engineer

Current

A1 Telekom Austria Group

Nov 2025 - Present (1 year)

Own development and maintenance of core systems including OCC and Memphis TIBCO-based ESB platform. Lead modernization, optimize API flows, and implement CI/CD pipelines.

Tibco Business Works TIBCO EMS Java Spring Boot SOAP REST APIs Git Jenkins Gitlab CI GitOps SQL Oracle Unix Linux GitHub Co Pilot API Gateway Event Driven Architecture

Current

Backend Developer / Solution Owner

Current

Freelance

Jan 2025 - Present (1 year 10 months)

Co-developed and deployed a production web-based ERP platform for a manufacturing company, owning backend architecture. Implemented role-based access control and automated workflows.

NodeJS Next.js JavaScript MongoDB Web Applications ERP Role Based Access Control Backend Development Automation

Technical Business Analyst / Integration

Erste Banka Srbija

Jul 2025 - Nov 2025 (4 months)

Led functional analysis and integration design for banking systems, including Temenos T24 integration and online lending application architecture. Facilitated design workshops and mentored junior team members.

T24 ESB REST APIs Kafka Event Streaming Integration Design Technical Documentation Banking Sector

Software Engineer

TNation

Aug 2024 - May 2025 (9 months)

Designed and maintained REST/SOAP web services and integration flows using webMethods and MuleSoft. Contributed to XL-BYG Denmark project, developing API and backend functionality for B2B and B2C integrations.

WebMethods MuleSoft Java Spring Boot NodeJS AWS Cloud MongoDB Soap Rest OpenAPI Jenkins GitHub Actions

Software Engineer

NLB DigIT

Dec 2023 - Aug 2024 (8 months)

Developed and supported enterprise ESB integrations, exposing a unified API layer on Azure API Management and Google Apigee. Led production support and root-cause analysis.

Azure API Management Azure Functions Google Apigee SOAP REST SQL PL SQL mTLS OAuth Java Spring Boot

Integration Architect

Schneider Electric

Dec 2022 - Dec 2023 (1 year)

Held technical leadership for projects integrating client APIs into ADMS platform. Led a 5-person delivery team and conducted requirements workshops and solution design reviews.

Solutions Architect ADMS Technical Leadership C# .NET SQL API Development Utility Industry Scrum