Open to opportunities

Jonathan Ström

@jonathanstrm

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Backend-focused software developer specializing in reliable cloud systems.

Sweden

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What I'm looking for

I'm looking for a senior backend or technical leadership role where I can design reliable cloud systems, mentor teams, solve hard problems, and work with collaborative, product-focused teams.

I'm a software developer who loves fixing tough problems and building backend systems in C#, Go, and Python that run reliably in AWS and Azure environments. I focus on long-lived, maintainable systems and take pride in digging into how things work behind the scenes.

I've led technical work across product and startup contexts, including data migrations, system architecture, CI/CD, serverless platforms, and integrations for payment, property, and industrial solutions. Notable contributions include migrating legacy systems to decoupled architectures, designing infrastructure and pipelines, and improving performance and observability.

I value working with great teams and clients, enjoy mentoring and technical leadership roles, and balance work with board games, biking, and woodworking in my spare time.

Experience

Work history, roles, and key accomplishments

Software Developer

HSB

Jan 2023 - Dec 2023 (11 months)

Maintained HSB's digital core services including authentication and user/role management; led secure data migrations from legacy systems to a decoupled architecture, reducing technical debt and improving reliability.

Azure Go C .NET Core MSSQL Docker Terraform Open Policy Agent Redis GitOps Kubernetes

Software Developer

Leaban

Jan 2022 - Dec 2022 (11 months)

Maintained and improved a platform of ~20 web APIs and services in Azure; improved performance and sustained integrations with loan agents, debt management systems and customer registries to ensure scalability and stability.

Azure .NET Core C Docker MSSQL React API Development Performance Optimization Integration

Technical Lead / Fullstack Developer

Fremsy

Jan 2022 - Dec 2022 (11 months)

Designed system architecture and implemented backend integrations for BioLens, automating biogas certificate workflows to improve data-driven decision-making and trading efficiency.

AWS .NET Core C Docker MSSQL React System Architecture Backend Integrations CI CD RESTful APIs

Software Developer

Worldline

Jan 2021 - Dec 2021 (11 months)

Worked on AML/KYC solutions handling large-volume clearing and transaction data transfers; contributed to long-term strategy for customer data storage and data pipeline reliability.

AWS Python Java BASH Terraform Docker Data Pipelines ETL Monitoring WSL

Fullstack Developer

SKF

Jan 2017 - Dec 2017 (11 months)

Built core platform foundations for Enlight across the bearing lifecycle; implemented CI/CD, automated deployments, logging, monitoring, testing and serverless AWS infrastructure to prevent failures and enable cross-team delivery.

AWS Terraform Go gRPC PostgreSQL Neo4j C Docker Datadog CI CD

Fullstack Developer

Matpriskollen

Jan 2017 - Dec 2017 (11 months)

Developed web and backend systems for price-analysis service, implementing parsers and data pipelines to track price changes and present comparisons across grocery stores.

C MSSQL Docker Linux React ETL Backend Development Excel Integration

Technical Lead / Fullstack Developer

TrueFlow

Jan 2015 - Dec 2015 (11 months)

Led architecture, app development and map generation for indoor positioning at large events; delivered real-time positioning, maps and backend services for venue deployments.

AWS Docker Go PostgreSQL ReactJS gRPC Android Elasticsearch Redis Real Time Systems

CTO / Mobile Developer

Merithon

Jan 2014 - Dec 2014 (11 months)

Led technical development and recruiting for a cross-platform fitness app; designed architecture, infrastructure and mobile app features to enable user activity tracking and competition.

AWS Python AngularJS Cordova Nagios Mobile Development System Architecture Recruitment

Software Developer

Volvo Car

Jan 2013 - Dec 2013 (11 months)

Developed in-car infotainment prototypes and HUD applications; collaborated with UI and test teams to ensure quality and security across embedded frameworks.

C QML Embedded Systems Security Prototyping WebSockets

Fullstack Developer

KeyFlo

Jan 2012 - Dec 2012 (11 months)

Maintained and enhanced web and backend systems for digital guestlists; implemented identity and access management, feature flags, invite functionality and social integrations.

MongoDB Python AngularJS Identity Management RESTful APIs Dedicated Servers

Software Engineer

Acosense

Jan 2011 - Dec 2011 (11 months)

Planned and implemented server environment for measurement equipment handling big data with encryption and redundancy; delivered monitoring, notification systems and web UIs for process-industry analysis.

Linux Java Monitoring Nagios RAID Networking Database Management Big Data