Senior Back End Engineer (Integrations)

AbacumBusiness Planning

Remote SpainFull-TimeSenior

SalaryCompetitive compensation including equity package

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Job Details

Experience: 7+ years of experience, at least 2+ of which are on integrations roles
Required Skills: Backend DevelopmentPythonData modeling

7+ years of software engineering experience.
2+ years of specific experience in integration roles.
Strong hands-on experience in Python and modern backend systems.
Proven background building integrations for data-heavy use cases.
Experience architecting or working on integration platforms, data platforms, or large-scale API ecosystems.
Proficiency with authentication and identity flows such as OAuth 2.0, OIDC, SSO, SAML, and JWT.
Experience managing token lifecycles and secret management.
Knowledge of secure communication protocols including TLS and HTTPS.
Ability to work across multiple programming languages and ecosystems beyond Python.
Demonstrated curiosity and persistence in tackling ambiguous technical problems like low-code builder design and LLM-assisted workflows.

Lead the design and development of Abacum's integrations platform for ingesting, normalizing, and annotating business data.
Build and scale bidirectional integrations with billing, accounting, ERP, commerce, and HRIS platforms.
Architect low-code/no-code tools (e.g. connector builder, declarative DSLs, LLM-assisted workflows) to accelerate integration development.
Manage authentication and identity flows (OAuth 2.0, OIDC, SSO, SAML, JWT) and ensure secure communication protocols.
Ensure integrations are secure, resilient, and performant for high-volume financial and transactional data.
Establish technical standards and guide architecture for integrations and data-heavy systems.
Collaborate with product, design, and financial experts to translate complex workflows into intuitive software experiences.

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