Full-Time
Backend Engineer
Multiple Teams
Posted on 9/22/2025
Taxfix
201-500 employees
Guided digital tax filing platform
No salary listed
Stuttgart, Germany
In Person
 Software Engineering (1) |
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- strong knowledge in at least one object-oriented or functional programming language (C, C++, Java, Kotlin, JavaScript/TypeScript, Scala, Python) – ideally with experience in Go
- enjoy writing high-performance, maintainable code
- experience designing and implementing complex systems
- expertise in container orchestration with Kubernetes, Docker Swarm, or similar tools
- Fluent in German Language
- a diversity champion
- Further developing and maintaining our backend services
- Actively shaping a scalable, future-ready architecture and infrastructure
- Collaborating closely with our product and frontend teams to design and implement new features
- Thinking holistically to provide the best possible usability for our users
- Being involved from the very beginning in the development of entirely new features or products, making a significant contribution.
Taxfix is a financial technology platform in Germany that simplifies tax filing for individuals. It guides users through a step-by-step question-based process to understand and complete their tax returns, with an option to use an independent tax advisor for expert help. The platform also supports automatic data retrieval from the tax office to pre-fill returns and enforces strong data security. The service is offered on a fee-for-service basis: users can try the platform for free and pay 39.99 euros upon submission (59.99 euros for joint filings), while the expert-advisor option charges 20% of the tax refund with a minimum of 59.99 euros. Taxfix is distinguished by its user-friendly guided workflow, integration with official data sources, and optional professional support, catering to both individual taxpayers and couples. Its goal is to make filing taxes in Germany easy, fast, and secure, reducing the time and effort required while ensuring accurate submissions.
Company Size
201-500
Company Stage
Series D
Total Funding
$326M
Headquarters
Berlin, Germany
Founded
2016
Simplify's Take
What believers are saying
- Over 8 million tax filings completed, securing €3.5 billion in refunds for customers.
- Appointed Markus Berger-de León as COO to unify AI-first operations in four markets.
- Rebranded TaxScouts under Taxfix, streamlining customer experience in UK and Spain.
What critics are saying
- 120 employee layoffs in 2023 post-Steuerbot acquisition strain TaxScouts integration.
- HMRC deadline compression triggers UK filing failures and penalties in April 2026.
- AI tax calculations trigger HMRC audits and €50M litigation within 12 months.
What makes Taxfix unique
- Taxfix combines AI-driven self-service with independent tax advisors for complex cases.
- Acquired TaxScouts in July 2024, adding 150 accountants for UK and Spain expansion.
- Automatic data retrieval and photo upload enable fully digital tax returns across Europe.
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Benefits
Mental Health Support
Flexible Work Hours
Remote Work Options
Employee Stock Options
Professional Development Budget
Paid Vacation
Wellness Program
Growth & Insights and Company News
6 month growth
↑ 0%1 year growth
↑ 0%2 year growth
↓ -2%Markus Berger-de León named COO as Taxfix aims to strengthen UK and european expansion. Taxfix has appointed Markus Berger-de León as its new Chief Operating Officer as the company advances its strategy for profitable growth across Germany, the UK and Spain. The move follows the integration of London-based TaxScouts earlier this year and reflects the company's effort to unify its operations under an AI-first framework. Berger-de León will oversee customer service, tax operations, and the expansion of Taxfix's advisory capabilities as the platform evolves to support a wide range of taxpayers, including self-employed workers, landlords, investors and small business owners. He steps into the role previously held by Daniel Kreter, who is departing after seven years to pursue his own venture. Berger-de León brings experience from leadership roles at McKinsey, MyHammer, StudiVZ and Jamba, where he worked on scaling digital products and operational systems. Taxfix views his appointment as a key step in strengthening its cross-market coordination while deepening its use of AI to deliver faster and more personalized tax services. Highlighting his motivation, he remarked, "The opportunity to bring that clarity and support to millions of people by making one of the most complex areas of finance - taxes - simpler and more accessible, was very compelling."
Taxfix Group (“Taxfix”), Europe’s leading financial platform for digital tax filing, has entered into a definitive agreement to acquire TaxScouts (“TaxScouts”), the market leader in accountant-assisted digital tax filing. TaxScouts is headquartered in London, UK, with offices in Madrid, Spain and Tallinn, Estonia.With this strategic move, Taxfix enters the UK market and cements its position as a leading force in European financial technology, offering a range of tax filing services in four of the biggest European markets: Germany, UK, Spain and Italy. The terms of the transaction will not be disclosed.The acquisition accelerates Taxfix’s international strategy and will unlock significant growth opportunities across Europe. With over 12 million people required to file a self assessment tax return every year, the UK presents significant growth potential, especially with 46% of filers struggling with the process*.Since its founding in 2017, TaxScouts has established a significant presence in the UK and Spain, achieving high customer satisfaction (4.8/5 on TrustPilot) with the support of over 150 tax accountants. With TaxScouts’ expertise in tax accountant support alongside Taxfix’s proven self-service tax filing and expanding tax expert-services, the combined Taxfix Group will provide even better customer experiences and help more people file their taxes.Martin Ott, CEO at Taxfix: “The acquisition of TaxScouts marks a significant step in our European expansion. Tax filing can be a daunting and painful process for so many people across Europe, and with TaxScouts, we share the same mission: to break down barriers and empower users to take control of their finances, starting with their tax return
Berlin-based Taxfix, a financial tax platform for tax filing, announced on Tuesday, July 2, that it has reached an agreement to acquire London-based TaxScouts, a company specialising in accountant-assisted digital tax filing.With this acquisition, the Berlin-based firm enters the UK market and aims to cement its position in European financial technology, offering a range of tax filing services in four of the biggest European markets: Germany, the UK, Spain, and Italy.However, the terms of the transaction will not be disclosed.The acquisition accelerates the German company’s international strategy and growth opportunities across Europe.Since its inception in 2017, TaxScouts has established a significant presence in the UK and Spain with the support of over 150 tax accountants.With TaxScouts’ expertise in tax accountant support alongside Taxfix’s proven self-service tax filing and expanding tax expert services, the combined Taxfix Group will provide even better customer experiences and help more people file their taxes.- A message from our partner -Post-acquisition, TaxScouts’ 40-people strong team will join forces with Taxfix.Malcolm Cowley, CEO of TaxScouts, will continue to spearhead TaxScouts at Taxfix Group.Kaupo Korv and Daniel Karger, founders of TaxScouts, will continue to serve as CPO and CTO at TaxScouts and work closely with the German company’s leadership team.TaxScouts: Tax and accounting platformLed by Malcolm Cowley, TaxScouts is a tax and accounting platform with a network of over 150 accredited accountants. The platform provides expert tax advice and tax filing solutions.Founded by former employees of fintech unicorns Wise and MarketInvoice, TaxScouts has raised £9.2M in funding and is supported by investors, including Octopus Ventures, SpeedInvest, Seedcamp, and a community-led CrowdCube Campaign.The company operates from offices in London, Madrid and Tallinn.Malcolm Cowley, CEO at TaxScouts, says, “We are thrilled to join the Taxfix family. Delivering exceptional service to our customers remains at the heart of what we do, and this partnership allows us to leverage Taxfix’s innovative approach and extensive resources to enhance our services in the UK and Spain.”“Our teams are a great fit, sharing a common mission to simplify tax filing and alleviate the associated stress for everyone. Enhanced by the scale and strength of Taxfix, we can achieve this goal on a larger scale together, making a significant impact across Europe and beyond,” adds Cowley.Taxfix: Financial tax platformFounded in 2016, Taxfix is a financial tax platform for tax filing – with over 6 million app downloads in Germany, Italy, and Spain.The company claims to be on a sustainable growth trajectory, bolstered by the successful acquisition of Steuerbot in 2023.To date, Taxfix has assisted over 5 million customers and secured more than €3.5 billion in refunds for European tax filers.The company is supported by well-known investors such as Index Ventures, Valar Ventures, Creandum, Redalpine, and Teachers’ Venture Growth (TVG).Martin Ott, CEO at Taxfix says, “The acquisition of TaxScouts marks a significant step in our European expansion. Tax filing can be a daunting and painful process for so many people across Europe, and with TaxScouts, we share the same mission: to break down barriers and empower users to take control of their finances, starting with their tax returns. I am personally very excited to officially welcome our new TaxScouts colleagues to the Taxfix Group
Berlin-based Taxfix, a financial tax platform for tax filing, announced on Tuesday, July 2, that it has reached an agreement to acquire London-based TaxScouts, a company specialising in accountant-assisted digital tax filing.With this acquisition, the Berlin-based firm enters the UK market and aims to cement its position in European financial technology, offering a range of tax filing services in four of the biggest European markets: Germany, the UK, Spain, and Italy.However, the terms of the transaction will not be disclosed.The acquisition accelerates the German company’s international strategy and growth opportunities across Europe.Since its inception in 2017, TaxScouts has established a significant presence in the UK and Spain with the support of over 150 tax accountants.With TaxScouts’ expertise in tax accountant support alongside Taxfix’s proven self-service tax filing and expanding tax expert services, the combined Taxfix Group will provide even better customer experiences and help more people file their taxes.- A message from our partner -Post-acquisition, TaxScouts’ 40-people strong team will join forces with Taxfix.Malcolm Cowley, CEO of TaxScouts, will continue to spearhead TaxScouts at Taxfix Group.Kaupo Korv and Daniel Karger, founders of TaxScouts, will continue to serve as CPO and CTO at TaxScouts and work closely with the German company’s leadership team.TaxScouts: Tax and accounting platformLed by Malcolm Cowley, TaxScouts is a tax and accounting platform with a network of over 150 accredited accountants. The platform provides expert tax advice and tax filing solutions.Founded by former employees of fintech unicorns Wise and MarketInvoice, TaxScouts has raised £9.2M in funding and is supported by investors, including Octopus Ventures, SpeedInvest, Seedcamp, and a community-led CrowdCube Campaign.The company operates from offices in London, Madrid and Tallinn.Malcolm Cowley, CEO at TaxScouts, says, “We are thrilled to join the Taxfix family. Delivering exceptional service to our customers remains at the heart of what we do, and this partnership allows us to leverage Taxfix’s innovative approach and extensive resources to enhance our services in the UK and Spain.”“Our teams are a great fit, sharing a common mission to simplify tax filing and alleviate the associated stress for everyone. Enhanced by the scale and strength of Taxfix, we can achieve this goal on a larger scale together, making a significant impact across Europe and beyond,” adds Cowley.Taxfix: Financial tax platformFounded in 2016, Taxfix is a financial tax platform for tax filing – with over 6 million app downloads in Germany, Italy, and Spain.The company claims to be on a sustainable growth trajectory, bolstered by the successful acquisition of Steuerbot in 2023.To date, Taxfix has assisted over 5 million customers and secured more than €3.5 billion in refunds for European tax filers.The company is supported by well-known investors such as Index Ventures, Valar Ventures, Creandum, Redalpine, and Teachers’ Venture Growth (TVG).Martin Ott, CEO at Taxfix says, “The acquisition of TaxScouts marks a significant step in our European expansion. Tax filing can be a daunting and painful process for so many people across Europe, and with TaxScouts, we share the same mission: to break down barriers and empower users to take control of their finances, starting with their tax returns. I am personally very excited to officially welcome our new TaxScouts colleagues to the Taxfix Group
Title: "Taxfix: Berlin-based Tax Start-up Expands to the UK" Since its founding in 2016, Taxfix has raised over $320 million. Investors include Teachers’ Venture Growth (TVG), the venture capital arm of the Ontario Teachers Pension Plan (OTPP), Peter Thiel's Valar Ventures, Creandum, and Index Ventures. In a significant 2022 funding round, Taxfix achieved unicorn status, being valued at over $1 billion.