Freelance Software Engineer

3 days ago


Athens, Attica, Greece Optimal Version Full time €60,000 - €80,000 per year

About Us

We're Optimal Version, a newly founded remote-only software company. Already working with established clients, we're now scaling up and expanding our capabilities. Our focus is on AI-driven development and cutting-edge infrastructure, using whatever tools help us build smarter and faster.

The Role

We're looking for freelance engineers in Athens to collaborate with us on an ad-hoc basis. Some months the workload spikes, and when it does, we need sharp engineers who can deliver at high pace without compromising quality.

This is a demanding role — designed for curious, ambitious engineers who thrive in fast-moving environments and love experimenting with new tech.

What You'll Do


• Design, develop, and test code.


• Help us scale up by shaping processes, tools, and best practices.


• Continuously explore emerging AI trends, staying ahead of the curve and putting them into action.


• Apply curiosity across both AI infrastructure and "normal" software builds — we use everything that gives us an edge.


• Collaborate closely during busy phases.

What We're Looking For


• Strong foundation in software engineering, OOP principles, and performance optimization.


• Hands-on Java + Spring Boot back-end experience.


• Familiarity with CI/CD pipelines (Jenkins, GitLab, etc.), testing, and databases (SQL & NoSQL).


• Curiosity and excitement for AI and modern developer tools.


• Independent, reliable, and comfortable working remotely.


• Based in Athens, Greece (preferred - not strict).


• A public GitHub/GitLab profile with demonstrated work is a strong plus.


• Moderate experience with Coding CLIs , LLM APIs and agentic workflows would be considered a plus.

What to Expect


• Remote-first: Work from anywhere.


• Flexible pay: Hourly rate negotiable based on experience and level.


• Extra rewards: For specific high-impact projects, completed deliveries are rewarded with dividend-style bonuses.


• Scaling together: Starts ad-hoc, but can evolve into repetitive or even near full-time collaboration as projects grow.


• Bring your own gear: No equipment provided — you work with your own setup.



  • Athens, Attica, Greece SGI Full time

    Software Engineering Team Lead (Contract) – Greece / HybridI'm currently supporting a major international GameTech organisation who are scaling their engineering capability in Greece. They're building next-generation entertainment platforms used by millions of players worldwide — and looking for a Software Engineering Team Lead to help drive technical...


  • Athens, Attica, Greece Entersoft Full time €35,000 - €55,000 per year

    Τhe merger of SOFTONE and ENTERSOFT has formed the largest provider of business software products and services in Greece. This newly unified organization now boasts over 1,500 employees and an extensive network of 700+ specialized partners, effectively serving a growing customer base of 90,000+ businesses across four countries (Greece, Cyprus, Bulgaria, and...


  • Athens, Attica, Greece Natech Financial Software Full time €60,000 - €120,000 per year

    Natech Banking Solutions is a leading European fintech company with nearly 20 years of experience in developing advanced banking systems for major financial institutions. Headquartered in Ioannina, with offices in Athens, Switzerland and Germany, Natech is at the forefront of digital banking innovation. Our comprehensive product suite includes core banking...


  • Athens, Attica, Greece Natech ∙ Financial Software Full time €60,000 - €120,000 per year

    Natech Banking Solutions is a leading European fintech company with nearly 20 years of experience in developing advanced banking systems for major financial institutions. Headquartered in Ioannina, with offices in Athens, Switzerland and Germany, Natech is at the forefront of digital banking innovation. Our comprehensive product suite includes core banking...


  • Athens, Attica, Greece Egon Software Greece Full time €45,000 - €75,000 per year

    Company Overview:Egon Software Pvt. Ltd. (ESL) is a wholly owned subsidiary of Egon Holdings SA, a Luxembourg-based company. Egon Holdings (EHS) is a privately owned conglomerate with diverse interests inDiamonds & Jewelry, Mining, Real Estate, and Investments, conducting operations in13 countrieswith a strong reputation for service reliability and...

  • Cloud Engineer

    2 weeks ago


    Athens, Attica, Greece SequeLab Full time €60,000 - €80,000 per year

    Cloud EngineerAbout SequeLabSequeLab is a center of excellence in genomics and preventive health, combining advanced biotechnology with AI-driven data analysis. We collaborate nationally and internationally to turn complex biological data into meaningful insights that support personalized health and scientific innovation. Our multidisciplinary team works...

  • Chemical Engineer

    3 days ago


    Athens, Attica, Greece Unicorn Domain Full time €60,000 - €80,000 per year

    Chemical Engineer (Freelance / Consulting – R&D Project)Location: Hybrid - minimum, Based on Project needs | Type: Project-based / FreelanceAre you a Chemical Engineer passionate about applying your expertise in materials, safety, and chemical processes to innovative challenges? We're working on a confidential R&D initiative in the field of fire protection...

  • Software Engineer

    2 weeks ago


    Athens, Attica, Greece Paymentology Full time €25,000 - €45,000 per year

    Paymentology is the first truly global issuer-processor, giving banks and fintechs the technology, team and experience to rapidly issue and process Mastercard, Visa cards across more than 60 countries, at scale. Our advanced, multi-cloud platform, offering both shared and dedicated processing instances, vast global presence and richer, real-time data, set...

  • Software Engineer

    1 week ago


    Athens, Attica, Greece Paymentology Full time €40,000 - €80,000 per year

    At Paymentology, we're redefining what's possible in the payments space. As the first truly global issuer-processor, we give banks and fintechs the technology and talent to launch and manage Mastercard, Visa cards at scale — across more than 60 countries.Our advanced, multi-cloud platform delivers real-time data, unmatched scalability, and the flexibility...

  • Software Engineer

    3 days ago


    Athens, Attica, Greece Pixelocracy Full time €25,000 - €50,000 per year

    Introduction: We welcome you to join Pixelocracy A powerful software company changing things across selected industries such as health, mobility and government.We are first and foremost a team of professionals working together to both improve our lives and our industry. As part of your onboarding process, the team and leadership will thoroughly help, guide...