Software & Performance Engineer, Fintech

Athens, Attica, Greece on site Until 8/22/2026 5+ years exp First posted February 7, 2026 Last posted February 7, 2026
Job description

Optasia is a fully enabled B2B2X financial technology platform covering scoring, financial decisioning, disbursement and collection. We are committed to enabling financial inclusion for all. We are changing the world our way.

We are seeking for enthusiastic professionals, with energy, who are results driven and have can-do attitude, who want to be part of a team of likeminded individuals who are delivering solutions in an innovative and exciting environment. As a Software & Performance Engineer, you will be pivotal in the development of software that provides real solutions. You will be deeply involved in the entire software development lifecycle and an integral part of all procedures to design, code, analyze and document application programs in Spring Framework. Working closely with other teams, you will be actively contributing to the process of evolving the company's products and you will play an important role in identifying and applying appropriate modern technologies and techniques for software development.

What you will do

  • Monitor and support production environments
  • Collaborate with other engineers to design, implement and publish to the world, demanding fintech services using Spring Framework
  • Identify and apply appropriate modern technologies and techniques for software development
  • Perform load-tests, analyze results, find root cause of performance issues and provide appropriate solutions proactively
  • Troubleshoot challenging performance and stability issues in real world environments

What you will bring

  • At least 5 years' of experience in a similar role
  • Passion about software development
  • Passion about application performance, reliability and scalability
  • Strong software development skills in Java, Spring and bash scripting
  • Solid foundation regarding computer science fundamentals including systems and networks
  • Experience with distributed high concurrency and high throughput applications
  • Experience and understanding of Relational databases, modeling and tuning for high throughput applications (Postgres)
  • Experience and understanding of load balancers and reverse proxies (httpd, nginx)
  • Experience with NoSQL databases (Elastic, Cassandra, Mongo) will be considered a plus
  • Experience with queueing and event streaming systems
  • Knowledge of using, configuring and setup of container orchestration tools (Docker Swarm, Kubernetes) will be considered a plus
  • Familiarity with CI/CD tools would be considered a plus
  • Experience in working with secure code development guidelines and coding practices (i.e. OWASP, NIST)

Your key attributes

  • Strong desire for exploring, evaluating and understanding in depth old and new technologies
  • Passion for learning new technologies and eagerness to collaborate with other creative minds
  • Excellent judgment, organizational and problem-solving skills
  • Ability to hit tight deadlines and work under pressure and strict attention to detail
  • Excellent communication skills and team working mentality

Why you should apply
What we offer:
πŸ’Έ Competitive remuneration package
🏝 Extra day off on your birthday
πŸ’° Performance-based bonus scheme
πŸ‘©πŸ½β€βš•οΈ Comprehensive private healthcare insurance
πŸ“² πŸ’» All the tech gear you need to work smart

Optasia’s Perks:
🎌 Be a part of a multicultural working environment
🎯 Meet a very unique and promising business and industry
🌌 🌠 Gain insights for tomorrow market’s foreground
πŸŽ“ A solid career path within our working family is ready for you
πŸ“š Continuous training and access to online training platforms
πŸ₯³ CSR activities and festive events within any possible occasion
🍜 Enjoy comfortable open space restaurant with varied meal options every day
🎾 πŸ§˜β€οΈ Wellbeing activities access such as free on-site yoga classes, plus available squash court on our premises

About this role

Summary

Develop and maintain high-performance fintech software; troubleshoot issues; collaborate on modern tech solutions.

Job title

Software & Performance Engineer, Fintech

Experience level

5+ years

Minimum experience

5+ years exp

Industry

financial technology

Location requirements

Athens, Greece; remote work not specified

Salary

Not specified

Management role

No

Skills & keywords

Required skills

JavaSpringbash scriptingrelational databasesload balancersHTTPDnginxsystem fundamentals

Preferred skills

NoSQL databasesqueueing systemsKubernetesCI/CDsecure coding

Specializations

JavaSpringperformancescalabilitydistributed systems
Locations

Structured locations inferred from the posting.

Athens, Greece

On-site City