Filip Konkowski

Senior Back-End Engineer | Kotlin & AWS

Salary / Daily rate

London, UK

Freelance

Remote only

Skills

KotlinSpring BootTerraformAWS

Languages

EnglishPolish

About me

Intro

Back-end engineer with 7+ years in enterprise banking and fintech, specializing in Kotlin/Spring Boot microservices and AWS infrastructure. Currently developing Direct Bank Integrations at Crown Agents Bank with expertise in CI/CD, RESTful APIs, and compliance-focused solutions. Ready to deliver scalable, secure banking solutions with modern tech stack.

Links

Work experience

Software Engineer

Crown Agents Bank

Sep 2023 - Present

3 years 2 months

London, UK

Develops and supports Direct Bank Integrations and FX adapter servicers. - Kotlin and Spring Boot to develop backend services. Delivering performant and maintainable solutions that meet our business requirements efficiently. - AWS cloud services and infrastructure as code (IaC) principles with Terraform to build scalable and resilient architectures that support our integration workflows. - CI/CD pipelines using GitHub Actions, enabling streamlined development, testing, and deployment processes for our integration projects. - RESTful APIs for secure and efficient data exchange with external banking partners, ensuring reliability and compliance with industry standards.

Software Engineer

iCabbi

May 2023 - Oct 2023

6 months

London, UK

Worked extensively on iCabbi's core software, Dispatch. - Contributed to maintaining, debugging, and enhancing the Dispatch system to improve its efficiency and reliability. - Collaborated with cross-functional teams to understand user requirements and translated them into robust software solutions. - Identified and resolved software anomalies, ensuring the seamless operation of the Dispatch system for taxi companies. - Contributed to the optimization of the system, ensuring fast and efficient dispatching of taxis in real-time.

Back End Developer

Lendable

Nov 2021 - Mar 2023

1 year 5 months

Greater London, England, United Kingdom

I successfully delivered a Continuous Integration (CI) pipeline for a Kotlin project. In addition, I took the lead in creating customer-facing features and also worked on the development of REST API endpoints that integrated with core business partners. - Delivering CI pipe line for project written in Kotlin - Leading on creation of features exposed directly to customers - Creation of REST API endpoints to integrate with core business partners

Back End Developer

Reward Gateway

May 2019 - Oct 2021

2 years 6 months

London, UK

Develops new features as well as refactors legacy code in the SAAS setting. Works as a core team member in the fastest growing product within Reward Gateway. Takes a part of the API-driven process in developing our react-native application. Main tasks include: • Building new recognition products and workflows for enterprise clients • Building REST API used in web and mobile applications • Refactoring core Reward&Recognition functionalities: optimising memory and processing usage • Building financial reports later used in company financial audits; Has been recognised for outstanding contribution

Back End Developer

VIPR Ltd

Mar 2017 - May 2019

2 years 3 months

London, UK

Design and development of various IT solutions for insurance industry. Implementation of event sourcing system using CQRS. Working with Domain Drive Design and Test Driven Development as main principles in creating new solutions. Using tools such as: • Symfony 2/3/4, Doctrine, MySQL • Git, Bitbucket • Jira • Envoyer for continues integration • PHPUnit, PHPspec, Behat • API, Dredd tests

Junior Programmer

Fachowcy.pl Ventures S.A.

Jan 2016 - Mar 2017

1 year 3 months

Warsaw, Poland

Implementation of new features as well as modification, enhancement and support of the existing components. • Collaborating with internal clients to ensure best design of implemented solutions; • Engage in pair-programing with senior engineer; • Working with languages and tools such as PHP, Symfony2, Yii, MySQL, Postgres, Doctrine, JavaScript, jQuery, PHP Unit, HTML, CSS, Bootstrap, Linux, GIT

Project Coordinator / Scrum Master

MCX Systems

Apr 2015 - Jul 2015

4 months

Warsaw, Poland

Facilitation of work in Energy Trading System project with special attention on strengthening sense of urgency in the team members. By using a servant leadership style provide support to the team whenever possible. • Facilitate scrum ceremonies (backlog refinement, sprint planning, retrospectives, daily stand-ups); • Track and communicate team velocity and sprint/release progress; • Remove obstacles that affect the development teams; • Improving transparency, and radiating information; • Ensuring focus of the team on delivering business value, sprint goals and improving daily work.

Technical Development Manager

COAM

Sep 2013 - Oct 2014

1 year 2 months

Bamyan, Afghanistan

• Redesigned and field tested three prototypes of ram pump, three prototypes of cookstoves, three prototypes of solar cooker, one gravity feed drip irrigation system; • Strong stress on cost approach and analyses of cost efficiency of new designs –20% reduction of product costs of cookstoves, ram pump, and drip system, • Completed WENR and LND projects within time line and expected results; • Conducted trainings and presentations of Design Lab green innovations for COAM partners such as GERES, BORDA and local government authorities; • Advice the Principal Technical Conservation Advisor and the Director in project development, research, analysis and dissemination of results. • Achieve 10% increase of workshop capacity of cookstoves by changing production processes and purchasing new hand machines and tools;

Technical Advisor

InfoXpress

Aug 2013 - Jan 2014

6 months

Kabul, Afghanistan

• Technical support in installing and maintenance of PV systems; • In charge of training technical staff of company; • Responsible for presenting technical aspects of PV systems for customers and business partners; • Computer tool analyse of PV systems;

Technical Advisor

Alez Limited

May 2013 - Aug 2013

4 months

Kabul, Afghanistan

• Technical advisor in installing and maintenance of solar water pumps; • Responsible for optimization of cost in solar water pumps projects; • Responsible for contract negotiation with suppliers; • In charge of finding new solar panels suppliers; • Technical analyse of solar panels manufacturers capacity;

Import - Export Project Manager

Helya Logistic Service Co. Ltd.

Sep 2012 - May 2013

9 months

Baghdād, Afghanistan

• Report status of cargo to the customers; • Responsible for cargo tracking procedures; • In charge of creation documents and managing document flow between ISAF, MOFA, MOF; • Managing flow of documentation for trans-loading cargo;

CEO

Euklides sp. z o.o.

Oct 2009 - May 2013

3 years 8 months

Warsaw, Poland

• Designed of e-learning/training internet platform for small and middle size enterprises; • Responsible for proposal writing – creation of the budget proposals and marketing strategies – for European Founds; • In charge of cooperation with Incubator of Innovation in e-business field; • Organization of training courses;

Renewable Energy Engineer

Tvindkraft

Feb 2012 - Jul 2012

6 months

Tvind, Denmark

• Installation of 4,5kW rooftop grid tied system; • Design and installation stand alone system containing PV (solar) panels and windmill; • “Bus for developing countries” – project with Necessary Teacher Training College - design and installation stand alone PV system in bus for inside lighting; • In charge of reparation and redesign solar water heating systems for college dormitory; • Responsible for an assistance during half year inspection of 1MW windmill; • Reparation hydraulic system of windmill emergency stop; • Windmill operator license;

Quality Inspector

P.P.H Radmot

Jan 2011 - Mar 2012

1 year 3 months

Radom, Poland

• In charge of preparation PPAP documentation (Production Part Approval Process); • Created PPAP documentation CP (Control Process); • Responsible for ccalculations of machine capability indices; • Practically used knowledge base about FMEA (Failure Mode and Criticality Analysis) and 8D report; • Responsible for analysis of SPC documentation; • Operated measuring instruments and devices (CMM, conturograph, transametr, micrometer); • Filled and actualized instruments and measuring devices in ERP system;

Bank office assistant

JJM sp. z o.o.

Sep 2007 - Dec 2007

4 months

Warsaw, Poland

Skills: Teamwork · Professional Services

Assistant of project engineering documentation affairs

Engineering Sp. z o.o.

May 2007 - Aug 2007

4 months

Warsaw, Poland

Skills: Professional Services

Assistant of project engineer

Zych S.j.

Jun 2006 - Aug 2006

3 months

Otwock, Poland

Assistant of project engineer

Lima-pol sp. z o.o.

May 2005 - Aug 2005

4 months

Masovian District, Otwock County, Poland


Education

Coders Lab

Back-End Development

2015 - 2015

1 month

Griffith University

Course online - Introduction to Business in Asia

2013 - 2013

1 month

Vanderbilt University

Couse online - Leading Strategic Innovation in Organizations

2013 - 2013

1 month

The George W. Woodruff School Of Mechanical Engineering - Georgia Institute Of Technology

Course on-line - Energy 101

2013 - 2013

1 month

Stanford University

Course on-line - Solar Cells

2012 - 2012

1 month

Warsaw University of Technology

Master of Engineering (M.Eng.)

2003 - 2012

9 years 1 month

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