Über Jojoo
Are you looking for a friendly and thoughtful professional to support your backend development initiatives, product or teams? I can help your growing startup or enterprise team by mapping your existing codebase and identifying bottlenecks tied directly to business goals. I can support your team to implement targeted improvements, aligning the technical roadmap with your runway, revenue milestones and upcoming releases.
I have experience leading software development teams and also executing as a senior engineer, so I bring to your product, team or scoped project both leadership and hands-on delivery.
Satisfied clients like working with me, because I pay very close attention to their needs and create long-lasting, reliable solutions.
Englisch
Muttersprachlich oder zweisprachig
Deutsch
Konversationssicher
Vor Ort möglich
Berlin (bis zu 50 km)
Projekt- und Berufserfahrung
- HelloFresh SEEngineering Manager + Stream LeadFebruar 2022 - Dezember 2024 (2 Jahre und 10 Monate)Berlin, Germany
- Directed a cross-functional team of 10+ backend, frontend, and QA engineers, tripling delivery velocity and serving millions of customers through clear planning, roadmap execution, and agile collaboration.
- Co-led delivery of a company-wide marketing initiative that increased customer lifetime value.
- Documented 130 test cases (covering 11% of test coverage across 3 departments), and drove adoption of documentation best practices to improve QA collaboration and visibility.
- Reviewed and enhanced five technical onboarding modules (Kafka, Vault, Unit Testing, Grafana Loki, Agile) and unblocked Kafka training path after a 3-month delay.
- Authored and reviewed Architectural Decision Records (ADRs), created and delivered 60+ roadmap tickets.
- Conducted more than fifteen advanced-stage interviews (System Design, Live Coding, General Tech) across five alliances and submitted 100% of scorecards within 10 hours, accelerating VP and Director-level hiring decisions.
- Mentored 5+ engineers and cross-functional professionals through 80+ sessions in formal mentorship programs.
- HelloFresh SELead Software EngineerMai 2019 - Februar 2022 (2 Jahre und 9 Monate)Berlin, Germany
- Led migration of a legacy revenue and dunning system from PHP monolith to Go microservices and Python pipelines, improving maintainability and accelerating deployment by 6x.
- Delivered roadmap milestones for €200M revenue initiatives, including fraud detection features in the Payments and Finance domain.
- Collaborated with product leads and engineers to define business-critical KPIs, visualizing metrics that drove a 3x improvement in team operational performance within 12 months.
- Developed a custom Python Prometheus metrics library to enhance observability, enabling proactive incident prevention and improving system resilience; collaborated closely with SRE and backend leads.
- Optimized CI/CD pipelines using data-driven analysis and devops pairing sessions, achieving a 5x deployment speedup and reducing deployment errors by 20%.
- Established a strong engineering culture grounded in TDD, pair and mob programming, reducing change failure rate (CFR) by 40% and significantly improving production reliability and customer experience.
- HelloFresh SEBackend Engineer + Incident ManagerAugust 2017 - Mai 2019 (1 Jahr und 9 Monate)Berlin, Germany
- Managed 24/7 incident response, resolving 100+ business-critical issues through engineer-stakeholder coordination.
- Contributed full-stack support for launches in five markets, made early contributions to Klepto and mentored peers in Go and Kubernetes testing.
- Promoted secure development practices via IAM role design with Terraform and participated in security and compliance training.
- Presented internal developer enablement tools that reduced Kubernetes feedback loops from ~7 minutes to 7 seconds (60x improvement).
- Defined and rolled out a communication policy for 400+ engineers, streamlining culture and reducing noise and improving efficiency during high-pressure incident mitigation.
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Ausbildung und Abschlüsse
- Master of ScienceSwansea University2017Master of Science
- Bachelor of ScienceKNUST2009Bachelor of Science