softstack

We invent, build, integrate and scale software

We build tailored software and craft mobile and web apps to match your needs. Beyond development, our team delivers high-level guidance across product strategy, UX, visual design, and end-to-end engineering, turning bold ideas into working products. We bring ambitious concepts to life as innovative applications with Node, React, Electron, Python, C++, and other modern technologies.

Location

Flensburg, Germany

Founding Year

Founded 2017

Company size

11-50

Hourly rate

€25 - €49

Minimum budget

> €1,000

5.0

7 reviews

You might want to ask

Services

Software Development25%

App Development25%

Blockchain & Web325%

Web Design25%

Frameworks

ASP.NET Core9%

Symfony9%

Flutter9%

Django9%

Node.js18%

VueJs14%

React14%

Laravel9%

Flask9%

Industry Expertise

ConsultingBanking and Financial ServicesInternet and Information TechnologyPublic Sector and AssociationsOther IndustriesConsumer Goods and RetailAudit, Tax and Legal

Client Segments

40%

Mid-market

30%

Small Businesses

30%

Enterprise

Reviews

CTO, Detix

5.0

Blockchain Development for Stablecoin Protocol

Budget

Decentralized Finance +$1

Services

Blockchain, Decentralized Finance, +1,

Timeline

Less than $10,000

Company Size

1-10 Employees

Industry

Banks

Location

Lisbon, Portugal

Cost 5.0

Quality 5.0

Schedule 5.0

Recommendation 5.0

Softstack audited a smart contract for a stablecoin protocol to ensure a safe launch without security risks. The team also provided a written report with their findings and support to fix them.

Softstack successfully found a couple of intermediate findings, which were fixed immediately. The team delivered on time and maintained very transparent, constant communication via email and messaging apps. Moreover, their fast onboarding process was extraordinary and unique in the industry.

Feb 12, 2026| Clutch

CPO, DeFi Company

5.0

Blockchain Dev & Cloud Consulting for DeFi Company

Budget

AWS Cloud Consulting & Implementation +$3

Services

Blockchain, Cloud Consulting & SI, AWS Cloud Consulting & Implementation, +3,

Timeline

$50,000 to $199,999

Company Size

11-50 Employees

Industry

Banks

Location

Germany

Cost 5.0

Quality 5.0

Schedule 5.0

Recommendation 5.0

softstack provides blockchain development and AWS cloud services for a DeFi company. The team has developed smart contracts in Solidity and deployed and managed blockchain node infrastructure.

softstack has successfully helped meet deadlines deemed impossible; they've saved four deadlines through their swift intervention and agility in taking on more work. The team's technical expertise and flexibility have been crucial to ensuring high-quality results and a smooth collaboration.

Feb 2, 2026| Clutch

CPO, Buddy Green

5.0

Cybersecurity Services for DeFi Protocol

Budget

Application Security +$2

Services

Cybersecurity, Application Security, +2,

Timeline

Less than $10,000

Company Size

11-50 Employees

Industry

Banks

Location

United Kingdom

Cost 5.0

Quality 5.0

Schedule 4.5

Recommendation 5.0

softstack audited a DeFi protocol's token core protocol and staking emissions. The team provided written reports and advice and re-audited after changes were implemented.

softstack's audit findings were precise and impact-focused. The team was responsive, thorough in retesting, and proactive about hardening the client's upgrade and treasury controls. As a result, the client was able to ship their product with confidence thanks to softstack's efforts.

Jan 28, 2026| Clutch

Account Manager, Neurotree

5.0

Blockchain for Mental Health Platform

Budget

Ethereum Development +$3

Services

Blockchain, Ethereum Development, +3,

Timeline

Confidential

Company Size

1-10 Employees

Industry

Other industries

Location

Duesseldorf, Germany

Cost 5.0

Quality 5.0

Schedule 5.0

Recommendation 5.0

softstack developed smart contracts from scratch for a mental health platform. They created a data vault using IPFS and Ethereum/Polygon for encrypted off-chain storage. They also integrated API hooks.

softstack's work reduced the client's admin time by 70%. The team delivered on time and communicated via virtual meetings, emails, and messaging apps. The client praised their deep expertise and friendliness.

Jan 12, 2026| Clutch

Head of Business Development, Blockchain Software Company

5.0

Cybersecurity for Blockchain Software Company

Budget

Application Security +$2

Services

Cybersecurity, Application Security, +2,

Timeline

$10,000 to $49,999

Company Size

201-500 Employees

Industry

Other industries

Location

Norway

Cost 5.0

Quality 5.0

Schedule 5.0

Recommendation 5.0

Softstack performed a comprehensive security assessment of a blockchain software company's new multi-purpose token standard. The team reviewed the architecture and code, checked for vulnerabilities, and more.

Softstack's efforts helped the client enhance their security and confidence in launching, marking the project's success. The team was responsive and professional throughout the process, and their pricing was competitive compared to other companies. They also delivered on time.

Nov 7, 2025| Clutch

COO, Buddy Green

5.0

DeFi Protocol Audit for Blockchain Company

Budget

Decentralized Finance +$3

Services

Blockchain, Cybersecurity, Decentralized Finance, +3,

Timeline

Less than $10,000

Company Size

51-200 Employees

Industry

Banks

Location

London, England

Cost 5.0

Quality 5.0

Schedule 5.0

Recommendation 5.0

Softstack audited a blockchain company’s cross-chain DeFi protocol, focusing on core protocol and staking mechanisms to ensure security and reliability.

Softstack delivered thorough audits with precise findings and clear remediation guidance. The team was highly responsive, met deadlines, and provided valuable insights missed by other auditors. Communication was friendly and efficient, and their attention to detail and fast turnaround were notable.

Oct 27, 2025| Clutch

Executive, Yumo

5.0

Blockchain Development for Crypto Trading Platform

Budget

$10,000 to $49,999

Services

Blockchain, Cybersecurity

Timeline

June 2025

Company Size

11-50 Employees

Industry

Other industries

Location

Serbia

Cost 5.0

Quality 5.0

Schedule 5.0

Recommendation 5.0

softstack provided blockchain development services for a crypto trading platform. The team audited smart contracts and off-chain infrastructure and reviewed on-chain withdrawal and deposit programs.

softstack successfully identified a couple of medium and low-risk findings, marking the project's success. The team was professional, responsive, and quick to turn around tasks. Moreover, their strong sense of professionalism and timeliness stood out in the partnership.

Oct 21, 2025| Clutch