Senior Banking and Brokerage API Developer

wealthAPI GmbH

. Develop and improve APIs to banks, brokers and crypto-platforms .

Posted 10/23/2026full-timeBerlin • GermanySenior💰 €80,000 - €100,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive software development expertise with a strong focus on API development for financial institutions, utilizing technologies such as Ruby on Rails and Spring Boot. Capable of leading projects, mentoring team members, and improving code quality while balancing delivery speed and architectural integrity.

Highest-signal resume keywords

API DevelopmentRuby On RailsSpring BootFinancial ExpertiseTest-Driven Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software DevelopmentUnit TestingIntegration TestingMachine LearningBig Data Technologies

Soft Skills

Team LeadershipProblem SolvingDecision MakingMentoringCommunication

Tools & Technologies

PostgresGoogle CloudKubernetesDockerAstra DBAstra Vector DB

Industry Keywords

FinanceWealth ManagementBanking APIsBrokerage APIsCustomer Experience

Tech Stack

Tools & technologies

CassandraCloudDockerJavaKubernetesMongoDBPostgresRubyRuby on RailsSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

Develop and improve APIs to banks, brokers and crypto-platforms
Investigate, interpret and reverse-engineer banking and brokerage APIs
Guide and support team members using financial and technical expertise
Take product assignments and lead them to completion in a small team
Own planning, interpretation, development and delivery phases
Participate in architectural design and decision-making
Conduct code peer reviews and attend retrospectives
Support junior and mid-level team members in achieving high code quality
Use Spring Boot, Ruby on Rails, Postgres, Google Cloud, Kubernetes, Docker, Astra DB and Astra Vector DB
Improve architecture, scalability and security through technological projects
Think about the product and improve customer experience

Requirements

What you’ll need

7+ years of software development experience
Strong background in finance or wealth management
Development experience in Ruby on Rails
Development experience in Java and preferably Spring Boot
Test-Driven Development
Extensive unit and integration testing skills
Machine learning experience or related statistical training is beneficial
Experience with a big-data stack such as MongoDB or Cassandra is beneficial
Willingness to learn about new technologies
Use data or reliable sources of information to drive decision-making
Ability to take on complex problems, learn quickly, and persist toward a good solution
Ability to balance speed of delivery against code quality
English is mandatory
German should be good enough to interpret a bank's accounting statements

Benefits

Comp & perks

30 days of paid leave
Virtual shares program
Flexible working times
Fully remote or hybrid positions
Urban Sports Club membership
Modern Apple hardware
Personal and professional growth
Equal career opportunity regardless of gender, identity, race or religion