Senior Software Engineer (Identity and Access Management system)

Praxy; Helsinki; Hybrid; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Healthcare package

Equity options

Hybrid workplace

Opportunity to work abroad up to 30 + 

Job summary

Smartly.io in Helsinki is seeking a Senior Software Engineer to strengthen our Identity and Access Management system within a secure, scalable, distributed service platform.

You will design and implement backend services using NodeJS and TypeScript, contribute to architecture decisions, and collaborate closely with product and infrastructure teams to deliver secure authentication and authorization capabilities.

Qualifications

• Minimum of 5 years of experience in designing, architecting, and building robust, distributed web apps.
• Proven ability to document and implement architectural patterns.
• Strong backend with NodeJS/TypeScript and familiarity with frontend tech (React).
• Experience with IAM solutions (OAuth/OpenID/SAML) is a plus and knowledge of RBAC is valued.
• Excellent written and spoken English; proactive, initiative-taking.

Responsibilities

• Architect, design, and document features and system enhancements for scalable distributed systems.
• Apply professional software engineering practices and patterns.
• Translate designs into robust, maintainable code (NodeJS/TypeScript).
• Develop and maintain APIs for internal and frontend use.
• Collaborate with product, infrastructure, and support teams.

Skills

NodeJS

TypeScript

React

IAM

OAuth

OpenID

SAML

Architectural patterns

System design

Tools

Kubernetes

PostgreSQL

Kafka

KnexJS

Koa

Job description

# Senior Software Engineer (Identity and Access Management system): Helsinki, Uusimaa, Finland: Jul 14, 2026: Sep 10, 2026## About the roleAre you an enthusiastic Software Engineer who’s ready to embark on new challenges and take your career to new heights? Join our team at Enigma in Helsinki as a Senior Software Engineer , and play a pivotal role in building our secure and scalable Identity and Access Management system.About the Team:As part of the Infrastructure Group at Smartly, Enigma is dedicated to managing Identity and Access Management (IAM) and Billing operations. We tackle complex challenges to ensure secure authentication, flexible authorization, and an efficient Billing Engine for our leading SaaS platform. For references on what problem we’re trying to solve:* User Identity and Access Management , including Role-Based Access Control ( RBAC ).* Authentication and login methods, including Single Sign-On (SSO) with SAML and OpenID .* Authorization mechanisms to control access to various modules of our platform to fit the needs of different customers.We develop and maintain several microservices built mainly using TypeScript, NodeJS, Koa, KnexJS, Postgres, Kafka and run in our Kubernetes clusters. This job position is targeted for a role in the Identity and Access Management domain of the team.Check out our Engineering at Smartly site to learn how our engineering and product development work.As a Senior Software Engineer, You Will:* Architect, design, and document new features and system enhancements, ensuring scalability, security, and maintainability for our complex, distributed systems.* Apply professional software engineering practices, including the selection, design, and implementation of various architectural and design patterns.* Translate architectural designs into maintainable, robust, high-quality code primarily using NodeJS and TypeScript .* Develop and maintain APIs for consumption by other backend services or frontend code.* Collaborate with diverse stakeholders, including product management, infrastructure, and support functions.What We’re Looking For:* Minimum of 5 years of experience in designing, architecting, and building robust, complex, and distributed web applications, where system-level design was a core responsibility. Writing code is not enough; we need proven expertise in system thinking.* Demonstrable professionalism in knowing how to design, document, and implement different architectural and design patterns.* Strong backend development skills with NodeJS & TypeScript with a good understanding of frontend technologies ( React ). Experience with Rust is considered an advantage* Bonus points for knowledge about different IAM-related solutions/technologies (such as Auth0, OAuth, OpenID & SAML, Google Zanzibar ).* Excellent written and verbal communication skills in English.* Proactive attitude and a passion for taking initiative.* Ability to work hybridly, spending at least 3 days a week in our Helsinki office.What We Offer You:* Inclusive Culture: Join a team of over 750 Smartlies representing more than 60 nationalities across 24 locations in 13 countries, and we foster a culture built on trust, transparency, and open feedback.* Global Impact: Be part of a company making a global impact, directly influencing our customers and business growth.* Wellbeing Focus: Enjoy generous healthcare packages, mental health services, and a healthy work-life balance with paid holidays and family leave.* Total Rewards: Benefit from equity options, performance-based rewards, competitive compensation, and ample career development opportunities.* Hybrid Workplace: Experience a hybrid work model, balancing office and remote work, with the option to work abroad for up to 30 days.Smartly is committed to being the best place to work for growth-minded individuals to thrive - explore more in our Culture Handbook !What to Expect from Our Recruitment Experience:* Meet your Recruiter: Get to know each other and learn about working at Smartly.io.* Meet the Team Lead: Gain deeper insights into your future team.* Meet the Team in Technical Interviews: Engage in interactive coding and Systems Design discussions with the team.* Meet the Leadership in a Final Meeting: A brief discussion with our Engineering Director.Apply Now and Shape Your Future with Smartly.io!