Senior Backend Developer – Typescript

osapiens

Senior Backend Developer at osapiens developing AI-driven solutions for enterprise software. Working in Mannheim with a focus on sustainability and collaborative teamwork.

Posted 6/2/2026full-timeMannheim • 🇩🇪 GermanySeniorWebsite

Tech Stack

Tools & technologies

JavaScriptNode.jsTypeScript

About the role

Key responsibilities & impact

Design, build, and optimize backend features using modern back-end technologies, ensuring scalability and maintainability.
Develop and enhance innovative software solutions that automate complex compliance workflows for businesses of all sizes.
Collaborate closely with product managers, designers, and engineers in small, agile squads (5-7 people) to define, refine, and implement features.
Ensure high-quality, secure, and efficient code through rigorous reviews, automated testing, and continuous integration/deployment (CI/CD) practices.
Own the architecture and design of solutions, optimizing for performance, reliability, and user experience.
Contribute to technical strategy and decision-making, identifying opportunities for innovation and process improvements.
Mentor and support junior developers, fostering a culture of learning and technical excellence within the team.

Requirements

What you’ll need

Strong experience in backend development with a focus on Node.js and TypeScript
Hands‑on experience leveraging AI‑guided development practices and collaborating within agentic, AI‑driven engineering environments.
Expertise in web services development and integration (REST etc.)
Familiarity with Git for version control and collaboration
Strong product mindset – you think beyond code, considering user experience, business impact, and scalability
Agile experience – comfortable working in sprints, participating in stand-ups, and iterating quickly
Excellent communication skills in English (C1). German is a bonus, but not necessary

Benefits

Comp & perks

A purpose-driven mission tackling complex sustainability challenges while working alongside global industry pioneers at a fast-growing unicorn company
Room for creativity through collaborative teamwork and an open communication culture
Flexibility and team bonding with our hybrid work options
Sustainable mobility options, promoting eco-friendly commuting solutions
Fun team events and outings with our global teams
An inspiring working environment in Mannheim (and globally!)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

backend developmentNode.jsTypeScriptAI-guided developmentweb services developmentRESTautomated testingcontinuous integrationcontinuous deploymentarchitecture design

Soft Skills

collaborationmentoringcommunicationproduct mindsetagile experienceinnovationprocess improvementlearning cultureuser experience focusteam support