blog/me

Evrim Öztamur — December 2022

Professional Experience

§ asm33

Founder and Software Developer

Mar 2020–Present

asm33 is a software consulting firm which works with financial services firms and provides process automation tools, significantly reducing the time spent on administration work for our B2B customers. Successful projects are released publicly as SaaS tools, such as:

batch2sepa, a tool that integrates with Xero to enable bookkeepers to create SEPA-compliant pain.001 and .008 files for batch payments and direct debit requests directly from their bookkeeping administrations. We got listed on the Xero marketplace for the first time.
Currently serving 150+ companies from 10 countries across the EU, processing 2,600+ transactions per month.
Redis + Flask with Python for backend.
Payrollmate, a scheduler to manage payroll entries in bulk, synchronising Xero with Nmbrs. Payroll journal entries generated by Nmbrs are filed automatically through a direct connection between Nmbrs and Xero. Especially useful for companies managing the bookkeeping for multiple subsidiaries or clients. Got listed on the Xero marketplace for the second time.
Redis + Flask + Zeep (SOAP API client) with Python for backend.
samba.link, which performs file conversions for various bank statement formats and can export the results or upload them into Xero and Exact Online, one of the biggest cloud accounting providers in the Netherlands. It operates over email, simplifying the conversion workflow.
Currently serving 50+ companies in the Netherlands.
SQLite (via SQLAlchemy) + Flask with Python for backend. Selenium for browser automation.
Developed a payment integration module with Stripe to collect fees for our different apps under one platform, and fully automating invoicing and VAT and EC-sales list compliance.
It exposes an API that allows our tools to process payments and record usage metrics with minimal logic in their architecture.
The module architecture also allows white-labelling the user interface based on which application is connecting to the module, unifying the logic and reducing redundancies in deploying separately for each app.
SQLite + Flask with Python for backend.
Developed several commissioned projects with Python, Rust, and Go to securely integrate multiple API data sources and ELT/ETL systems, extend functionality to client tooling, and improve performance of existing systems.

§ AsjesBisseling

Valuation Analyst

Jun 2022–Present

Collaborating with various private equity and tax advisory firms to prepare valuations for tech, bio-tech, and family businesses.

Developed quantitative parts of various company, share class, and intellectual property valuation products
Assisted in substantiating these valuations and similar credit risk assessment calculations to the Belastingdienst (Dutch Tax and Customs Administration)
Delivered 20+ valuation analyses for successful tax ruling requests to the Belastingdienst
Used models ranging from complex discounted cash flow setups to scenario analyses to money multiple calculations

§ CCOUNT

Financial Consultant

Sep 2019–Jul 2022 (2 years and 11 months)

Managed financial services for several tech-oriented start-ups and providing equity structuring, valuations, and fiscal advice.
Supported several start- and scale-ups through their funding rounds and acquisition processes.

Junior Financial Consultant

Jun 2018–Aug 2019 (1 year and 3 months, part-time alongside MSc studies)

Used online accounting tools and learned about Dutch tax accounting rules and handled bookkeeping and corporate finance tasks.
Tackled general IT systems and used Microsoft Azure services to set up internal- and freelancer-use VM architectures to further develop CCOUNT’s tech focused approach, and optimise our finance workflows.

§ University of Amsterdam

Teaching Assistant

May 2018

Supervised the academic skills part of the second-year International Money course, also involving the grading for the students’ personal presentations on the subject material.

Teacher

Sep 2017–Jan 2018 (5 months)

Direct teacher for more than one hundred and fifty students over the course of the entire first semester.

Taught the first-year Economics and Business Economics and Business Administration course Principles 2, concerning academic writing in English and relevant research-related skills.

Education and Training

§ University of Amsterdam

Master of Science (MSc) in Finance (Quantitative Finance)

2018–2019

8.5 GPA with cum laude, and 8.5 for MSc thesis “Jumping into dynamism – An alternative approach to the timing of portfolio rebalancing strategies,” which extends my BSc thesis subject by using the recent advancements in the field of signal processing and machine learning.

By predicting 10-day volatility spikes, utilising a combination of GARCH and Pruned Exact Linear Time (PELT), I was able to increase the utility of passive portfolio rebalancing. The result was a highly significant and substantial increase in portfolio returns compared to the infamous periodic 1/N model.
Used Python for processing and collection of more than 20 GBs of procedurally generated financial performance data, simulating portfolios, statistical analysis, and visualisation of processes and results. Created a novel graph type to demonstrate the evolution of portfolios and their performance metrics over time.

Bachelor of Science (BSc) in Economics and Business (Economics and Finance)

2015–2018

7.5 GPA, and 8.5 for BSc thesis “Passive stock portfolio optimisation through re-investment strategies on return series’ variance changes,” focusing on the time frames over which the statistical moments used in portfolio optimisation techniques.

Used Python and associated data analysis libraries to process data and execute the strategies, and Stata to perform the final descriptions.

Volunteer Experience

§ Rostra Economica

Editor-in-Chief

Jan 2018–Aug 2018 (8 months)

Rostra Economica is the student magazine of the Faculty of Economics and Business at the UvA, operating for 70 years to date. As the editor-in-chief, I helped facilitate a better environment and create a stronger organisational structure for the magazine in order to increase editor commitment and participation

We recovered the brand image of Rostra Economica in the student body and ended up increasing our website’s active users and sessions by 22% and 27% respectively.
After a grand 65th anniversary lustrum edition, we ended up distributing 2,000 copies of our magazine to the students of not on ours, but also other faculties.
We managed the one of the most diverse student committees on campus, and successfully executed marketing campaigns, professionalisation efforts, and social events for the magazine.
Handled the organisational matters and general communications for the magazine throughout this period.
Scheduling meetings, taking the minutes, and issuing reservations were the most common tasks.
Designed and executed the layout of the two paper editions that were published with InDesign, still used today!